Dynamic Generation of Text Fields and Saving the Values to database[Answered] RSS

• • Reply
  teenajohn198...

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  Dynamic Generation of Text Fields and Saving the Values to database

  Jul 15, 2020 02:10 AM|teenajohn1989|LINK

  Hi,

  I have to dynamically generate three textfields placed inside a panel.This text fields are displayed only when the approval column of three approvers are checked .

  If any of the approver is not checked then the panel wont be displaying.

  I want to dynamically generate the textfileds on a button click and want to save the data to the database.

  Appreciate help on this.

  This is the aspx code for panel.

  <asp:Panel ID="pnlPartnerDetails" runat="server">
                                      <!--Partners Name-->
                                      <tr>
                                          <td class="auto-style9" style="text-align:left;">Partners Name</td>
                                          <td class="auto-style12">
                                              <asp:TextBox ID="txtPartnerName" ValidationGroup="editCustomer"  runat="server"></asp:TextBox>                                    
                                          </td>
                                          <td style="text-align:left;">
                                              <asp:ImageButton ID="imgBtnSalesChannelHead" ImageUrl="~/images/plus.png"  runat="server"/>
                                          </td>
                                          <td style="text-align:left;">                                    
                                          </td>
                                      </tr>
  
                                      <!--Partners Email-->
                                      <tr>
                                          <td class="auto-style9" style="text-align:left;">Partners Email</td>
                                          <td class="auto-style12">
                                              <asp:TextBox ID="txtPartnerEmail" ValidationGroup="editCustomer"  runat="server"></asp:TextBox>                                    
                                          </td>
                                          <td></td>
                                          <td style="text-align:left;">                                    
                                          </td>
                                      </tr>
  
                                      <!--Partners Designation-->
                                      <tr>
                                          <td class="auto-style9" style="text-align:left;">Partners Designation</td>
                                          <td class="auto-style12">
                                              <asp:TextBox ID="txtPartnersDesignation" ValidationGroup="editCustomer"  runat="server"></asp:TextBox>                                    
                                          </td>
                                          <td></td>
                                          <td style="text-align:left;">                                    
                                          </td>
                                      </tr>
                                  </asp:Panel>

• • Reply
  XuDong Peng

  Member

  690 Points

  209 Posts

  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 15, 2020 03:49 AM|XuDong Peng|LINK

  Hi teenajohn1989,

  You could use the Visible property of the panel to control whether it is displayed on the page.

  And what is the approver you mentioned, is it CheckBox? If this is the case, you could determine and set whether the panel is displayed in the OnCheckedChanged event.

  If you want to dynamically generate controls, you could choose where to place them, use something like:

  Page.FindControl(position).Controls.Add(control);

  Or you could define the control in advance and then use the display panel method to display it.

  For more details, please refer to the following code:

  Page code:
  
  <body>
      <form id="form1" runat="server">
          <asp:CheckBox ID="CheckBox1" runat="server" OnCheckedChanged="CheckBox1_CheckedChanged" AutoPostBack="true"/>:approver1<br />
          <asp:CheckBox ID="CheckBox2" runat="server" OnCheckedChanged="CheckBox1_CheckedChanged" AutoPostBack="true"/>:approver2<br />
          <asp:CheckBox ID="CheckBox3" runat="server" OnCheckedChanged="CheckBox1_CheckedChanged" AutoPostBack="true"/>:approver3<br />
          <div>
              <asp:Panel ID="pnlPartnerDetails" runat="server" Visible="false">
                  <table>
                      <!--Partners Name-->
                      <tr>
                          <td class="auto-style9" style="text-align: left;">Partners Name</td>
                          <td class="auto-style12">
                              <asp:TextBox ID="txtPartnerName" ValidationGroup="editCustomer" runat="server"></asp:TextBox>
                          </td>
                          <td style="text-align: left;">
                              <asp:ImageButton ID="imgBtnSalesChannelHead" ImageUrl="~/images/plus.png" runat="server" OnClick="imgBtnSalesChannelHead_Click"/>
                          </td>
                          <td style="text-align: left;" runat="server" id="TextField1"></td>
                      </tr>
  
                      <!--Partners Email-->
                      <tr>
                          <td class="auto-style9" style="text-align: left;">Partners Email</td>
                          <td class="auto-style12">
                              <asp:TextBox ID="txtPartnerEmail" ValidationGroup="editCustomer" runat="server"></asp:TextBox>
                          </td>
                          <td></td>
                          <td style="text-align: left;"></td>
                      </tr>
  
                      <!--Partners Designation-->
                      <tr>
                          <td class="auto-style9" style="text-align: left;">Partners Designation</td>
                          <td class="auto-style12">
                              <asp:TextBox ID="txtPartnersDesignation" ValidationGroup="editCustomer" runat="server"></asp:TextBox>
                          </td>
                          <td></td>
                          <td style="text-align: left;"></td>
                      </tr>
                  </table>
              </asp:Panel>
          </div>
      </form>
  </body>

  Code behind:
  
  protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
          {
              if (CheckBox1.Checked && CheckBox2.Checked && CheckBox3.Checked)
              {
                  pnlPartnerDetails.Visible = true;
              }
              else
              {
                  pnlPartnerDetails.Visible = false;
              }
          }
  
          protected void imgBtnSalesChannelHead_Click(object sender, ImageClickEventArgs e)
          {
              //save data to database
              using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["conStr"].ToString()))
              {
                  ......
              }
              //generate the TextBox
              TextBox box = new TextBox();
              box.Attributes.Add("ID", "text1");
              Page.FindControl("TextField1").Controls.Add(box);
          }

  Result:

  

  If I misunderstood what you meant, please let me know.

  Hope this can help you.

  Best regards,

  Xudong Peng

• • Reply
  teenajohn198...

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  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 15, 2020 02:34 PM|teenajohn1989|LINK

  Hi XuDong Peng,

  Thanks for your reply.

  I managed to display the textfields based on the approval.What i need is , i want to create three textfields on a single click.

  that means replicating  all the three textfields inside the panel.

  i want to generate as many textfields,not just one .

  Hope it is clear.Thanks in advance.

• • Reply
  asteranup

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  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 15, 2020 02:45 PM|asteranup|LINK

  you can simply try-

  var panel = Page.FindControl("TextField1");
  int numberOfTextBox = 5;
  for(int i =0; i<numberOfTextBox; i++)
  {
      TextBox box = new TextBox();
      box.Attributes.Add("ID", $"text{i}");
      panel.Controls.Add(box);
  }

  Thanks,
  Anup Das Gupta
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• • Reply
  teenajohn198...

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  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 15, 2020 03:15 PM|teenajohn1989|LINK

  Hi asteranup,

  I cannot hardcode the no:of textbox,if the user wants to add more than 5 textboxes ,then this wont work.

  and also i want to generate the entire textboxes inside the panel,which means when i click on the add button it should generate the three textboxes - Partner Name,Partner Email,Partner Designation.

  Thanks in advance

• • Reply
  asteranup

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  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 15, 2020 07:11 PM|asteranup|LINK

  You don't need to hard code number to 5. That's why I have added it as a variable. You can get a number of textboxes from any sources. I believe you need a set of three text boxes and you need to set to be dynamic. Logic follows the same process-

  You can check working code here-

  https://github.com/anupdg/dotnetsamples/blob/master/WebFormSamples/WebFormSamples/2169001-Dynamic%2BGeneration%2Bof%2BText%2BFields%2Band%2BSaving%2Bthe%2BValues%2Bto%2Bdatabase.aspx.cs

  Thanks,
  Anup Das Gupta
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• • Reply
  teenajohn198...

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  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 16, 2020 08:14 AM|teenajohn1989|LINK

  Hi asteranup,

  Thanks for your response.

  I tried your code.It works !But my requirement is different.

  Please check this screenshot

  There wont be any sources to get the no:of textboxes to be generated. When i click on the plus button it has to generate the next set.

  Hope this is clear.

• • Reply
  asteranup

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  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 16, 2020 09:06 AM|asteranup|LINK

  It should be similar, instead of looping through and creating control, you need to add a set of controls on the click of a button. You can use the same List<YourDataClass> to hold all the dynamically added controls. Remember to add regenerate the controls from init as dynamically created control will live through every postback

  Thanks,
  Anup Das Gupta
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• • Reply
  teenajohn198...

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  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 16, 2020 09:56 AM|teenajohn1989|LINK

  Hi asteranup,

  Im didnt get what you are saying.Could you please explain a bit more,i'm new to this technology.

  protected void btnGenerateControls_Click(object sender, EventArgs e)
          {
              container.Controls.Clear();
              Session["ControlGenerated"] = Convert.ToInt32(txtNimberOfGroup.Text);
              GenerateControls();
          }

  How i can set this txtNimberOfGroup.Text value.Because this value is using for the loop.

  Thanks in advance!

• • Reply
  asteranup

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  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 16, 2020 11:10 AM|asteranup|LINK

  What I mean is this-

  https://github.com/anupdg/dotnetsamples/blob/master/WebFormSamples/WebFormSamples/2169001-Dynamic%2BGeneration%2Bof%2BText%2BFields%2Band%2BSaving%2Bthe%2BValues%2Bto%2Bdatabase1.aspx.cs

  You can run and see.

  Thanks,
  Anup Das Gupta
  Visit My Blog
  You can also connect with me in LinkedIn
• • Reply
  teenajohn198...

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  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 16, 2020 11:23 AM|teenajohn1989|LINK

  Hi asteranup,

  I tried out ,when i click on the add button,the whole content is gone and its dispalying empty page.

  Here is my code,i made some changes.

  <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication6.WebForm1" %>
  
  <!DOCTYPE html>
  
  <html xmlns="http://www.w3.org/1999/xhtml">
  <head runat="server">
      <title></title>
  </head>
  <body>
      <form id="form1" runat="server">
          <div>
              <asp:Panel ID="pnlPartnerDetails" runat="server">
                  <table>
                                      <!--Partners Name-->
                                      <tr>
                                          <td class="auto-style9" style="text-align:left;">Partners Name</td>
                                          <td class="auto-style12">
                                              <asp:TextBox ID="txtPName" ValidationGroup="editCustomer"  runat="server"></asp:TextBox>                                    
                                          </td>
                                          <td style="text-align:left;">
                                              <asp:ImageButton ID="imgBtnSalesChannelHead" ImageUrl="~/images/plus.png" OnClick="imgBtnSalesChannelHead_Click"  runat="server"/>
                                          </td>
                                          <td style="text-align:left;">                                    
                                          </td>
                                      </tr>
  
                                      <!--Partners Email-->
                                      <tr>
                                          <td class="auto-style9" style="text-align:left;">Partners Email</td>
                                          <td class="auto-style12">
                                              <asp:TextBox ID="txtPEmail" ValidationGroup="editCustomer"  runat="server"></asp:TextBox>                                    
                                          </td>
                                          <td></td>
                                          <td style="text-align:left;">                                    
                                          </td>
                                      </tr>
  
                                      <!--Partners Designation-->
                                      <tr>
                                          <td class="auto-style9" style="text-align:left;">Partners Designation</td>
                                          <td class="auto-style12">
                                              <asp:TextBox ID="txtPDesignation" ValidationGroup="editCustomer"  runat="server"></asp:TextBox>                                    
                                          </td>
                                          <td></td>
                                          <td style="text-align:left;">                                    
                                          </td>
                                      </tr>
  </table>
                                  </asp:Panel>
              
          </div>
      </form>
  </body>
  </html>
  

  Here is my aspx.cs file

  using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Web;
  using System.Web.UI;
  using System.Web.UI.WebControls;
  
  namespace WebApplication6
  {
      public partial class WebForm1 : System.Web.UI.Page
      {
          class PertnerData
          {
              public string PName { get; set; }
              public string PEmail { get; set; }
              public string PDesignation { get; set; }
          }
          protected void Page_Load(object sender, EventArgs e)
          {
  
          }
          private void AddLabel(string label, Panel p)
          {
              Label lbl = new Label();
              lbl.Text = label;
              p.Controls.Add(lbl);
          }
          private void AddTextBox(string id, Panel p)
          {
              TextBox box = new TextBox();
              box.ID = id;
              p.Controls.Add(box);
          }
  
          protected void Page_PreInit(object sender, EventArgs e)
          {
              if (Page.IsPostBack)
              {
                  GenerateControls();
              }
          }
  
          private void GenerateControls()
          {
              int numberOfControls = Convert.ToInt32(Session["ControlGenerated"]);
              pnlPartnerDetails.Controls.Clear();
              for (int i = 0; i < numberOfControls; i++)
              {
                  Panel p = new Panel();
                  p.Style.Add("border", "solid 1px blue");
                  p.Style.Add("margin", "5px");
                  pnlPartnerDetails.Controls.Add(p);
  
                  AddLabel($"Name {i}", p);
                  AddTextBox($"txtPName{i}", p);
                  AddLabel($"Email {i}", p);
                  AddTextBox($"txtPEmail{i}", p);
                  AddLabel($"Designation {i}", p);
                  AddTextBox($"txtPDesignation{i}", p);
                  pnlPartnerDetails.Controls.Add(new LiteralControl("<br />"));
              }
  
          }
          protected void imgBtnSalesChannelHead_Click(object sender, ImageClickEventArgs e)
          {
              int numberOfControls = Convert.ToInt32(Session["ControlGenerated"]);
              numberOfControls++;
              Session["ControlGenerated"] = numberOfControls;
              GenerateControls();
          }
  
          protected void btnGetValues_Click(object sender, EventArgs e)
          {
              int numberOfControls = Convert.ToInt32(Session["ControlGenerated"]);
  
              List<PertnerData> data = new List<PertnerData>();
  
              PertnerData pd;
              for (int i = 0; i < numberOfControls; i++)
              {
                  pd = new PertnerData();
                  pd.PName = GetValue($"txtPName{i}");
                  pd.PEmail = GetValue($"txtPEmail{i}");
                  pd.PDesignation = GetValue($"txtPDesignation{i}");
                  data.Add(pd);
              }
          }
          string GetValue(string id)
          {
              return ((TextBox)pnlPartnerDetails.FindControl(id)).Text;
          }
  
      }
  }

  Couldnt figure out why its displaying a blank page on button click.

• • Reply
  asteranup

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  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 16, 2020 12:05 PM|asteranup|LINK

  The code I have shared is the working code. You can run my application by cloning from git. I want to believe that you can copy the code and make the necessary changes to add to your project.

  Thanks,
  Anup Das Gupta
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• • Reply
  teenajohn198...

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  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 17, 2020 04:41 AM|teenajohn1989|LINK

  Hi asteranup,

  I managed to get it done.

  i have few doubts ,

  1)Whenever i change the for loop intialisation value to 1,the fields are not generating on the first click.When i click for the second time fields are generating.

  Webform1.aspx

  Webform1.aspx.cs

  2)how can i remove the control dynamically? Please see this screenshot

  Thanks in advance

• • Reply
  asteranup

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  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 17, 2020 04:52 AM|asteranup|LINK

  Hi,

  I have already shared a working code. Please clone the repo to your local, run and debug, you can easily find out what you are missing.

  https://github.com/anupdg/dotnetsamples/blob/master/WebFormSamples/WebFormSamples/2169001-Dynamic%2BGeneration%2Bof%2BText%2BFields%2Band%2BSaving%2Bthe%2BValues%2Bto%2Bdatabase1.aspx.cs

  Thanks,
  Anup Das Gupta
  Visit My Blog
  You can also connect with me in LinkedIn
• • Reply
  teenajohn198...

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  4 Points

  39 Posts

  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 17, 2020 06:01 AM|teenajohn1989|LINK

  Hi asteranup,

  Yes,your code is working.

  i had made the changes by editing your working code only,my doubt is 

  private void GenerateControls()
  {
  int numberOfControls = Convert.ToInt32(Session["ControlGenerated"]);
  container.Controls.Clear();
  for (int i = 1; i < numberOfControls; i++)
  {
  }
  }

  in this for loop i have changed the value of int i=1,clicking for first time it wont generate the textfields,but when i click for the second time it will generate.

  if i revert my change that is int i = 0,everything works fine.first click itself it will generate the textfileds with id 0.

  and in your code ,the page first load with only Addnew and Getvalues link.

  So i have changed it to my requirement.In my page at first it will have a panel with three textfields .then i click on the button it will add another panel.This is exactly what i need.

  and in your code there is no option to remove the controls. thats what i asked as my second doubt.

  Thanks for your kind and quick responses

• • Reply
  asteranup

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  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 17, 2020 06:31 AM|asteranup|LINK

  Don't change the index. Instead of that add the following code-

          protected void Page_Load(object sender, EventArgs e)
          {
              if (!IsPostBack) {
                  Session["ControlGenerated"] = 1;
                  GenerateControls();
              }
          }

  Thanks,
  Anup Das Gupta
  Visit My Blog
  You can also connect with me in LinkedIn
• • Reply
  teenajohn198...

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  4 Points

  39 Posts

  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 17, 2020 07:57 AM|teenajohn1989|LINK

  Hi asteranup,

  Thank you so much :) . Finally i got it done. :)

  One more help i need,for deleting the dynamic text field generated i have wriiten the following code

  private void RemoveControls()
          {
              int numberOfControls = Convert.ToInt32(Session["ControlGenerated"]);
              container.Controls.Clear();
              for (int i = 1; i < (numberOfControls - 1); i++)
              {
                  Panel p = new Panel();
                  p.Controls.Remove(new LiteralControl($"<tr id='partnerName{i}'>"));
  
              }
  
  
          }
  
  

  protected void imageButton_Click(object sender, ImageClickEventArgs e)
          {
              int numberOfControls = Convert.ToInt32(Session["ControlGenerated"]);
              numberOfControls--;
              Session["ControlGenerated"] = numberOfControls;
              RemoveControls();
  
          }

  
  
  

  But when i click on the remove button.its deleting the entire textfields generated dynamically.

  Could you please help me to figure out the issue?

• • Reply
  XuDong Peng

  Member

  690 Points

  209 Posts

  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 17, 2020 09:34 AM|XuDong Peng|LINK

  Hi teenajhn1989,

  According to your description above, I created a simple example to meet your needs.

  For more details, please refer to the following code:

  Page code:
  
  <head runat="server">
      <title></title>
      <script src="Scripts/jquery-3.4.1.min.js"></script>
      <script>
          function DeleteRows() {
              $('<%="#"+hf_deleteCommand.ClientID%>').val("DeleteRow");
          }
      </script>
  </head>
  <body>
      <form id="form1" runat="server">
          <div runat="server" id="mainDiv">
              <asp:Panel ID="pnlPartnerDetails" runat="server">
                  <table>
                      <!--Partners Name-->
                      <tr>
                          <td class="auto-style9" style="text-align: left;">Partners Name</td>
                          <td class="auto-style12">
                              <asp:TextBox ID="txtPartnerName" ValidationGroup="editCustomer" runat="server"></asp:TextBox>
                          </td>
                          <td style="text-align: left;">
                              <asp:ImageButton ID="imgBtnSalesChannelHead" ImageUrl="~/images/plus.png" runat="server" OnClick="imgBtnSalesChannelHead_Click" />
                          </td>
                          <td style="text-align: left;" runat="server" id="TextField1"></td>
                      </tr>
  
                      <!--Partners Email-->
                      <tr>
                          <td class="auto-style9" style="text-align: left;">Partners Email</td>
                          <td class="auto-style12">
                              <asp:TextBox ID="txtPartnerEmail" ValidationGroup="editCustomer" runat="server"></asp:TextBox>
                          </td>
                          <td></td>
                          <td style="text-align: left;"></td>
                      </tr>
  
                      <!--Partners Designation-->
                      <tr>
                          <td class="auto-style9" style="text-align: left;">Partners Designation</td>
                          <td class="auto-style12">
                              <asp:TextBox ID="txtPartnersDesignation" ValidationGroup="editCustomer" runat="server"></asp:TextBox>
                          </td>
                          <td></td>
                          <td style="text-align: left;"></td>
                      </tr>
                  </table>
              </asp:Panel>
              <asp:HiddenField ID="hf_deleteCommand" runat="server" />
          </div>
      </form>
  </body>

  Code behind:
  
  public static int controlNum;
          protected void Page_Load(object sender, EventArgs e)
          {
              if (!Page.IsPostBack)
              {
                  controlNum = 0;
              }
  
              if (IsPostBack)
              {
                  if(hf_deleteCommand.Value == "DeleteRow")
                  {
                      controlNum--;
                      hf_deleteCommand.Value = "";
                      GenerateControl();
                  }
              }
  
          }
  
          private void AddLabel(string label, Panel p)
          {
              Label lbl = new Label();
              lbl.Text = label;
              p.Controls.Add(lbl);
          }
          private void AddTextBox(string id, Panel p)
          {
              TextBox box = new TextBox();
              box.ID = id;
              p.Controls.Add(box);
          }
  
          protected void imgBtnSalesChannelHead_Click(object sender, ImageClickEventArgs e)
          {
              controlNum++;
              GenerateControl();
          }
  
          private void GenerateControl() {
              for (int i = 0; i < controlNum; i++)
              {
                  Panel p = new Panel();
                  p.ID = $"panel{i}";
                  p.Style.Add("border", "solid 1px blue");
                  p.Style.Add("margin", "5px");
                  mainDiv.Controls.Add(p);
  
                  AddLabel($"Name {i}:", p);
                  AddTextBox($"txtPName{i}", p);
                  
                  AddLabel($"Email {i}:", p);
                  AddTextBox($"txtPEmail{i}:", p);
  
                  AddLabel($"Designation {i}:", p);
                  AddTextBox($"txtPDesignation{i}", p);
  
                  Button btn = new Button();
                  btn.Text = "Delete";
                  btn.OnClientClick = "DeleteRows()";
  
                  p.Controls.Add(btn);
                  mainDiv.Controls.Add(new LiteralControl("<br />"));
              }
          }

  Result:

  

  Best regards,

  Xudong Peng

• • Reply
  teenajohn198...

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  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 17, 2020 09:49 AM|teenajohn1989|LINK

  Hi XuDong Peng,

  Thanks for your reply .

  In your demo,its not deleting the correct index.

  when you click delete button for the second row,its deleting third row.

  and i want to implement this without using jquery .

  Thanks again for your quick response .

• • Reply
  asteranup

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  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 17, 2020 11:12 AM|asteranup|LINK

  You can add link button also as a part of each rows. Done some changes on the existing code you can check below-

  https://github.com/anupdg/dotnetsamples/blob/master/WebFormSamples/WebFormSamples/2169001-Dynamic%2BGeneration%2Bof%2BText%2BFields%2Band%2BSaving%2Bthe%2BValues%2Bto%2Bdatabase1.aspx.cs

      public partial class _2169001_Dynamic_Generation_of_Text_Fields_and_Saving_the_Values_to_database1 : System.Web.UI.Page
      {
          class PertnerData
          {
              public string PName { get; set; }
              public string PEmail { get; set; }
              public string PDesignation { get; set; }
          }
          protected void Page_Load(object sender, EventArgs e)
          {
              if (!IsPostBack) {
                  Session["ControlGenerated"] = new Dictionary<int, PertnerData> { { 1, new PertnerData() } };
                  GenerateControls();
              }
          }
          private void AddLabel(string label, Panel p)
          {
              Label lbl = new Label();
              lbl.Text = label;
              p.Controls.Add(lbl);
          }
          private void AddTextBox(string id, Panel p, string data)
          {
              TextBox box = new TextBox();
              box.ID = id;
              box.Text = data;
              p.Controls.Add(box);
          }
  
          protected void Page_PreInit(object sender, EventArgs e)
          {
              if (Page.IsPostBack)
              {
                  GenerateControls();
              }
          }
  
          private void GenerateControls()
          {
              Dictionary<int, PertnerData> numberOfControls = (Dictionary<int, PertnerData>)Session["ControlGenerated"];
              container.Controls.Clear();
              foreach (var i in numberOfControls)
              {
                  Panel p = new Panel();
                  p.ID = $"container{i.Key}";
                  p.Style.Add("border", "solid 1px blue");
                  p.Style.Add("margin", "5px");
                  container.Controls.Add(p);
  
                  AddLabel($"Name {i.Key}", p);
                  AddTextBox($"txtPName{i.Key}", p, i.Value.PName);
                  AddLabel($"Email {i.Key}", p);
                  AddTextBox($"txtPEmail{i.Key}", p, i.Value.PEmail);
                  AddLabel($"Designation {i.Key}", p);
                  AddTextBox($"txtPDesignation{i.Key}", p, i.Value.PDesignation);
                  AddDeleteButton(i.Key, p);
                  container.Controls.Add(new LiteralControl("<br />"));
              }
          }
  
          private void AddDeleteButton(int id, Panel p)
          {
              LinkButton button = new LinkButton();
              button.ID = $"Delete{id}";
              button.Attributes.Add("DataId", id.ToString());
              button.Text = $"Delete {id}";
              button.Style.Add("margin-left", "5px");
              button.Click += new EventHandler(delete_Click);
              p.Controls.Add(button);
          }
          protected void delete_Click(object sender, EventArgs e) {
              var btn = sender as LinkButton;
              var idToDelete = Convert.ToInt32( btn.Attributes["DataId"]);
              Dictionary<int, PertnerData> numberOfControls = (Dictionary<int, PertnerData>)Session["ControlGenerated"];
              numberOfControls = numberOfControls.Where(c => c.Key != idToDelete).ToDictionary(x => x.Key, x => x.Value);
              Session["ControlGenerated"] = numberOfControls;
              GenerateControls();
          }
  
          protected void btnAddAnother_Click(object sender, EventArgs e)
          {
              Dictionary<int, PertnerData> numberOfControls = (Dictionary<int, PertnerData>)Session["ControlGenerated"];
              numberOfControls.Add(numberOfControls.Keys.Max() + 1, new PertnerData());
              Session["ControlGenerated"] = numberOfControls;
              GenerateControls();
          }
  
          protected void btnGetValues_Click(object sender, EventArgs e)
          {
              var keys = ((Dictionary<int, PertnerData>)Session["ControlGenerated"]).Keys;
  
              Dictionary<int, PertnerData> numberOfControls = new Dictionary<int, PertnerData>();
              PertnerData pd;
              foreach (var i in keys)
              {
                  pd = new PertnerData();
                  pd.PName = GetValue($"txtPName{i}");
                  pd.PEmail = GetValue($"txtPEmail{i}");
                  pd.PDesignation = GetValue($"txtPDesignation{i}");
                  numberOfControls[i] = pd;
              }
              Session["ControlGenerated"] = numberOfControls;
          }
          string GetValue(string id)
          {
              return ((TextBox)container.FindControl(id)).Text;
          }
      }

  Thanks,
  Anup Das Gupta
  Visit My Blog
  You can also connect with me in LinkedIn
• • Reply
  teenajohn198...

  Member

  4 Points

  39 Posts

  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 18, 2020 04:28 PM|teenajohn1989|LINK

  Hi asteranup,

  Thanks for your reply.The delete button is working fine.

  But i have one more issue,when the page loads,it loads with the generated textfields with deletebutton,even if i didnt click the add new button.

  Please see this screenshot

  And whenever i add details in the textfields and click the add new button ,the previously entered details are removed.

  my sincere thanks for your effort.

• • Reply
  teenajohn198...

  Member

  4 Points

  39 Posts

  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 20, 2020 07:11 AM|teenajohn1989|LINK

  Hi astreanup,

  Could you please help me to  resolve this -  whenever i add details in the textfields and click the add new button ,the previously entered details are removed.

  Thanks in advance

• • Reply
  asteranup

  All-Star

  20943 Points

  4984 Posts

  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 20, 2020 05:41 PM|asteranup|LINK

  teenajohn1989

  But i have one more issue,when the page loads,it loads with the generated textfields with deletebutton,even if i didnt click the add new button.

  Change -

  Session["ControlGenerated"] = new Dictionary<int, PertnerData> { { 1, new PertnerData() } };

  to-

  Session["ControlGenerated"] = new Dictionary<int, PertnerData> {  } };

  Thanks,
  Anup Das Gupta
  Visit My Blog
  You can also connect with me in LinkedIn
• • Reply
  asteranup

  All-Star

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  4984 Posts

  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 20, 2020 06:08 PM|asteranup|LINK

  teenajohn1989

  the previously entered details are removed.

  As subsequent postback data gets lost for a dynamic control. You need to retain data (in session) while adding new control-

          protected void btnAddAnother_Click(object sender, EventArgs e)
          {
              Dictionary<int, PertnerData> numberOfControls = (Dictionary<int, PertnerData>)Session["ControlGenerated"];
              numberOfControls.Add(numberOfControls.Keys.Max() + 1, new PertnerData());
              fillData(ref numberOfControls);
              Session["ControlGenerated"] = numberOfControls;
              GenerateControls();
          }
  
          private void fillData(ref Dictionary<int, PertnerData>  numberOfControls) {
  
              foreach (var controls in numberOfControls) {
                  controls.Value.PName = GetValue($"txtPName{controls.Key}");
                  controls.Value.PEmail = GetValue($"txtPEmail{controls.Key}");
                  controls.Value.PDesignation = GetValue($"txtPDesignation{controls.Key}"); 
              }
          }
  
          string GetValue(string id)
          {
              return ((TextBox)container.FindControl(id))?.Text;
          } 

  Thanks,
  Anup Das Gupta
  Visit My Blog
  You can also connect with me in LinkedIn
• • Reply
  teenajohn198...

  Member

  4 Points

  39 Posts

  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 21, 2020 02:28 AM|teenajohn1989|LINK

  Hi asteranup,

  Thank you so much ,I have one request,can you please make a tutorial for this in your blog.It would be more helpful for beginners like me.

  I came to know about dictionary concepts from your coding only ,thank you so much for all the help.

• • Reply
  teenajohn198...

  Member

  4 Points

  39 Posts

  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 21, 2020 02:31 AM|teenajohn1989|LINK

  Hi ateranup,

  i have changed the code as you mentioned,

  Change -

  Session["ControlGenerated"] = new Dictionary<int, PertnerData> { { 1, new PertnerData() } };

  to-

  Session["ControlGenerated"] = new Dictionary<int, PertnerData> {  } };

  but getting this error System.InvalidOperationException: 'Sequence contains no elements'  when i click on the add button.

  Thanks in Advance!

• • Reply
  asteranup

  All-Star

  20943 Points

  4984 Posts

  Re: Dynamic Generation of Text Fields and Saving the Values to database

  Jul 21, 2020 09:46 AM|asteranup|LINK

  Please debug and compare.

  Thanks,
  Anup Das Gupta
  Visit My Blog
  You can also connect with me in LinkedIn