gridview current row delete

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asp.ambur

Member

399 Points

1101 Posts

gridview current row delete

Oct 31, 2016 08:19 PM|asp.ambur|LINK

Hello

This is my code to remove current row

 protected void Gridview1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        if (ViewState["CurrentTable"] != null)
        {
            DataTable dt = (DataTable)ViewState["CurrentTable"];
            DataRow drCurrentRow = null;
            int rowIndex = Convert.ToInt32(e.RowIndex);
            if (dt.Rows.Count > 1)
            {
                dt.Rows.Remove(dt.Rows[rowIndex]);
                drCurrentRow = dt.NewRow();
                ViewState["CurrentTable"] = dt;
                Gridview1.DataSource = dt;
                Gridview1.DataBind();

                for (int i = 0; i < Gridview1.Rows.Count - 1; i++)
                {
                    Gridview1.Rows[i].Cells[0].Text = Convert.ToString(i + 1);
                }
                SetPreviousData();
            }
        }
    }

but when i click delete it removing upper row not current rows

Please check and give me write code

Thank You

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codemovement...

Contributor

2290 Points

794 Posts

Re: gridview current row delete

Oct 31, 2016 08:35 PM|codemovement.pk|LINK

I can place few lines that can delete your current row.

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
    dt.Rows.RemoveAt(e.RowIndex);
    GridView1.DataSource = dt;
    GridView1.DataBind();
}

Also In below mentioned way

Gridview1.DeleteRow(e.RowIndex);
Gridview1.DataBind();

Also you can delete from DB and rebind gridview.

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
      int ID = int.Parse(GridView1.Rows[e.RowIndex].FindControl("ID").toString());
      string delete_command = "DELETE FROM your_table WHERE ID = " + ID;
      SqlDataSource1.DeleteCommand = delete_command;
}

Hope it Helps

Hope it helps.

If my solution works for you, please mark it as answer! It will help others.
Get more information: http://codemovement.pk

Thanks,

Reply

asp.ambur

Member

399 Points

1101 Posts

Re: gridview current row delete

Oct 31, 2016 08:44 PM|asp.ambur|LINK

im using this tutoral remove current row not from database

http://www.aspsnippets.com/Articles/Adding-Dynamic-Rows-in-ASP.Net-GridView-Control-with-TextBoxes.aspx

Reply

codemovement...

Contributor

2290 Points

794 Posts

Re: gridview current row delete

Oct 31, 2016 08:45 PM|codemovement.pk|LINK

Let me go through it.

If my solution works for you, please mark it as answer! It will help others.
Get more information: http://codemovement.pk

Thanks,

Reply

asp.ambur

Member

399 Points

1101 Posts

Re: gridview current row delete

Oct 31, 2016 08:48 PM|asp.ambur|LINK

i want to remove current row in gridview instead of above row

my current code is like this

protected void Gridview1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        if (ViewState["CurrentTable"] != null)
        {
            DataTable dt = (DataTable)ViewState["CurrentTable"];
            DataRow drCurrentRow = null;
            int rowIndex = Convert.ToInt32(e.RowIndex);
            if (dt.Rows.Count > 1)
            {
                dt.Rows.Remove(dt.Rows[rowIndex]);
                drCurrentRow = dt.NewRow();
                ViewState["CurrentTable"] = dt;
                Gridview1.DataSource = dt;
                Gridview1.DataBind();

                for (int i = 0; i < Gridview1.Rows.Count - 1; i++)
                {
                    Gridview1.Rows[i].Cells[0].Text = Convert.ToString(i + 1);
                }
                SetPreviousData();
            }
        }
    }

Reply

Nasser Malik

Star

13440 Points

2760 Posts

Re: gridview current row delete

Oct 31, 2016 08:51 PM|Nasser Malik|LINK

Try this

protected void Gridview1_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            if (ViewState["CurrentTable"] != null)
            {
                DataTable dt = (DataTable)ViewState["CurrentTable"];
                DataRow drCurrentRow = null;
                int rowIndex = Convert.ToInt32(e.RowIndex);
                if (dt.Rows.Count > 1)
                {
                    dt.Rows.Remove(dt.Rows[rowIndex]);
                    drCurrentRow = dt.NewRow();
                    ViewState["CurrentTable"] = dt;
                    Gridview1.DataSource = dt;
                    Gridview1.DataBind();

                    for (int i = 0; i < Gridview1.Rows.Count; i++)
                    {
                        Gridview1.Rows[i].Cells[0].Text = Convert.ToString(i + 1);
                    }
                    SetPreviousData();
                }
            }
        }

see demo here

Please Mark as Answer if find helpful -- Nasser --
Skype: maleknasser1
LinkedIn: https://www.linkedin.com/in/maliknasser

Reply

asp.ambur

Member

399 Points

1101 Posts

Re: gridview current row delete

Oct 31, 2016 09:03 PM|asp.ambur|LINK

still its not removing the current row its removing above row

Reply

codemovement...

Contributor

2290 Points

794 Posts

Re: gridview current row delete

Oct 31, 2016 09:06 PM|codemovement.pk|LINK

Here is the full Code

ASPX PAGE

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default16.aspx.cs" Inherits="WebApplication4.Default16" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      <asp:gridview ID="Gridview1"  runat="server"  ShowFooter="true"  
                             AutoGenerateColumns="false"  
                             OnRowCreated="Gridview1_RowCreated">  
    <Columns>  
        <asp:BoundField DataField="RowNumber" HeaderText="Row Number" />  
        <asp:TemplateField HeaderText="Header 1">  
            <ItemTemplate>  
                <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>  
            </ItemTemplate>  
        </asp:TemplateField>  
        <asp:TemplateField HeaderText="Header 2">  
            <ItemTemplate>  
                <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>  
            </ItemTemplate>  
        </asp:TemplateField>  
        
        <asp:TemplateField HeaderText="Header 4">  
            
            <FooterStyle HorizontalAlign="Right" />  
            <FooterTemplate>  
                <asp:Button ID="ButtonAdd" runat="server"   
                                     Text="Add New Row"   
                                     onclick="ButtonAdd_Click" />  
            </FooterTemplate>  
        </asp:TemplateField>  
        <asp:TemplateField>  
            <ItemTemplate>  
                <asp:LinkButton ID="LinkButton1" runat="server"   
                                        onclick="LinkButton1_Click">Remove</asp:LinkButton>  
            </ItemTemplate>  
        </asp:TemplateField>  
    </Columns>  
</asp:gridview>  
    </div>
    </form>
</body>
</html>

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

namespace WebApplication4
{
    public partial class Default16 : System.Web.UI.Page
    {
        private ArrayList GetDummyData()
        {

            ArrayList arr = new ArrayList();

            arr.Add(new ListItem("Item1", "1"));
            arr.Add(new ListItem("Item2", "2"));
            

            return arr;
        }

       

        private void SetInitialRow()
        {

            DataTable dt = new DataTable();
            DataRow dr = null;

            dt.Columns.Add(new DataColumn("RowNumber", typeof(string)));
            dt.Columns.Add(new DataColumn("Column1", typeof(string)));//for TextBox value   
            dt.Columns.Add(new DataColumn("Column2", typeof(string)));//for TextBox value   
           

            dr = dt.NewRow();
            dr["RowNumber"] = 1;
            dr["Column1"] = string.Empty;
            dr["Column2"] = string.Empty;
            dt.Rows.Add(dr);

            //Store the DataTable in ViewState for future reference   
            ViewState["CurrentTable"] = dt;

            //Bind the Gridview   
            Gridview1.DataSource = dt;
            Gridview1.DataBind();

            
        }

        private void AddNewRowToGrid()
        {

            if (ViewState["CurrentTable"] != null)
            {

                DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
                DataRow drCurrentRow = null;

                if (dtCurrentTable.Rows.Count > 0)
                {
                    drCurrentRow = dtCurrentTable.NewRow();
                    drCurrentRow["RowNumber"] = dtCurrentTable.Rows.Count + 1;

                    //add new row to DataTable   
                    dtCurrentTable.Rows.Add(drCurrentRow);
                    //Store the current data to ViewState for future reference   

                    ViewState["CurrentTable"] = dtCurrentTable;


                    for (int i = 0; i < dtCurrentTable.Rows.Count - 1; i++)
                    {

                        //extract the TextBox values   

                        TextBox box1 = (TextBox)Gridview1.Rows[i].Cells[1].FindControl("TextBox1");
                        TextBox box2 = (TextBox)Gridview1.Rows[i].Cells[2].FindControl("TextBox2");

                        dtCurrentTable.Rows[i]["Column1"] = box1.Text;
                        dtCurrentTable.Rows[i]["Column2"] = box2.Text;

                        //extract the DropDownList Selected Items   

                        DropDownList ddl1 = (DropDownList)Gridview1.Rows[i].Cells[3].FindControl("DropDownList1");
                        DropDownList ddl2 = (DropDownList)Gridview1.Rows[i].Cells[4].FindControl("DropDownList2");

                        // Update the DataRow with the DDL Selected Items   

                      

                    }

                    //Rebind the Grid with the current data to reflect changes   
                    Gridview1.DataSource = dtCurrentTable;
                    Gridview1.DataBind();
                }
            }
            else
            {
                Response.Write("ViewState is null");

            }
            //Set Previous Data on Postbacks   
            SetPreviousData();
        }

        private void SetPreviousData()
        {

            int rowIndex = 0;
            if (ViewState["CurrentTable"] != null)
            {

                DataTable dt = (DataTable)ViewState["CurrentTable"];
                if (dt.Rows.Count > 0)
                {

                    for (int i = 0; i < dt.Rows.Count; i++)
                    {

                        TextBox box1 = (TextBox)Gridview1.Rows[i].Cells[1].FindControl("TextBox1");
                        TextBox box2 = (TextBox)Gridview1.Rows[i].Cells[2].FindControl("TextBox2");

                       

                        if (i < dt.Rows.Count - 1)
                        {

                            //Assign the value from DataTable to the TextBox   
                            box1.Text = dt.Rows[i]["Column1"].ToString();
                            box2.Text = dt.Rows[i]["Column2"].ToString();

                           

                        }

                        rowIndex++;
                    }
                }
            }
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                SetInitialRow();
            }
        }

        protected void ButtonAdd_Click(object sender, EventArgs e)
        {
            AddNewRowToGrid();
        }

        protected void Gridview1_RowCreated(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                DataTable dt = (DataTable)ViewState["CurrentTable"];
                LinkButton lb = (LinkButton)e.Row.FindControl("LinkButton1");
                if (lb != null)
                {
                    if (dt.Rows.Count > 1)
                    {
                        if (e.Row.RowIndex == dt.Rows.Count - 1)
                        {
                            lb.Visible = false;
                        }
                    }
                    else
                    {
                        lb.Visible = false;
                    }
                }
            }
        }

        protected void LinkButton1_Click(object sender, EventArgs e)
        {
            LinkButton lb = (LinkButton)sender;
            GridViewRow gvRow = (GridViewRow)lb.NamingContainer;
            int rowID = gvRow.RowIndex;
            if (ViewState["CurrentTable"] != null)
            {

                DataTable dt = (DataTable)ViewState["CurrentTable"];
                if (dt.Rows.Count > 1)
                {
                    if (gvRow.RowIndex < dt.Rows.Count - 1)
                    {
                        //Remove the Selected Row data and reset row number  
                        dt.Rows.Remove(dt.Rows[rowID]);
                        ResetRowID(dt);
                    }
                }

                //Store the current data in ViewState for future reference  
                ViewState["CurrentTable"] = dt;

                //Re bind the GridView for the updated data  
                Gridview1.DataSource = dt;
                Gridview1.DataBind();
            }

            //Set Previous Data on Postbacks  
            SetPreviousData();
        }

        private void ResetRowID(DataTable dt)
        {
            int rowNumber = 1;
            if (dt.Rows.Count > 0)
            {
                foreach (DataRow row in dt.Rows)
                {
                    row[0] = rowNumber;
                    rowNumber++;
                }
            }
        }
    }
}

Hope it helps

If my solution works for you, please mark it as answer! It will help others.
Get more information: http://codemovement.pk

Thanks,

Reply

asp.ambur

Member

399 Points

1101 Posts

Re: gridview current row delete

Oct 31, 2016 09:12 PM|asp.ambur|LINK

there is no row at position 1

error

Reply

asp.ambur

Member

399 Points

1101 Posts

Re: gridview current row delete

Nov 01, 2016 04:53 AM|asp.ambur|LINK

On load of first time gridview first row not showing remove button if i go to second row then its showing remove button in first row if click remove its not removing current row

Please check the code

Reply

Nan Yu

All-Star

17835 Points

3408 Posts

Microsoft

Re: gridview current row delete

Nov 01, 2016 09:19 AM|Nan Yu|LINK

Hi asp.ambur,

If gridview has only one row , then you could hide /disable the remove button,since that has no sense to remove the only one row . You could refer to below code sample :

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>

            <asp:GridView ID="Gridview1" runat="server" ShowFooter="true" AutoGenerateColumns="false">
                <Columns>
                    <asp:BoundField DataField="RowNumber" HeaderText="Row Number" />
                    <asp:TemplateField HeaderText="Header 1">
                        <ItemTemplate>
                            <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField HeaderText="Header 2">
                        <ItemTemplate>
                            <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField HeaderText="Header 3">
                        <ItemTemplate>
                            <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
                        </ItemTemplate>
                        <FooterStyle HorizontalAlign="Right" />
                        <FooterTemplate>
                            <asp:Button ID="ButtonAdd" runat="server" Text="Add New Row" OnClick="ButtonAdd_Click" />
                        </FooterTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField>
                        <ItemTemplate>
                            <asp:LinkButton ID="LinkButton1" runat="server"
                                OnClick="LinkButton1_Click">Remove</asp:LinkButton>
                        </ItemTemplate>
                    </asp:TemplateField>

                </Columns>
            </asp:GridView>
        </div>
    </form>
</body>
</html>

Code behind :

        private void SetInitialRow()
        {
            DataTable dt = new DataTable();
            DataRow dr = null;
            dt.Columns.Add(new DataColumn("RowNumber", typeof(string)));
            dt.Columns.Add(new DataColumn("Column1", typeof(string)));
            dt.Columns.Add(new DataColumn("Column2", typeof(string)));
            dt.Columns.Add(new DataColumn("Column3", typeof(string)));
            dr = dt.NewRow();
            dr["RowNumber"] = 1;
            dr["Column1"] = string.Empty;
            dr["Column2"] = string.Empty;
            dr["Column3"] = string.Empty;
            dt.Rows.Add(dr);
            //dr = dt.NewRow();

            //Store the DataTable in ViewState
            ViewState["CurrentTable"] = dt;

            Gridview1.DataSource = dt;
            Gridview1.DataBind();

            LinkButton lb = (LinkButton)Gridview1.Rows[0].FindControl("LinkButton1");
            lb.Enabled = false;
        }
       
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                SetInitialRow();
            }
        }

        private void AddNewRowToGrid()
        {
            int rowIndex = 0;

            if (ViewState["CurrentTable"] != null)
            {
                DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
                DataRow drCurrentRow = null;
                if (dtCurrentTable.Rows.Count > 0)
                {
                    for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
                    {
                        //extract the TextBox values
                        TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("TextBox1");
                        TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("TextBox2");
                        TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("TextBox3");

                        drCurrentRow = dtCurrentTable.NewRow();
                        drCurrentRow["RowNumber"] = i + 1;

                        dtCurrentTable.Rows[i - 1]["Column1"] = box1.Text;
                        dtCurrentTable.Rows[i - 1]["Column2"] = box2.Text;
                        dtCurrentTable.Rows[i - 1]["Column3"] = box3.Text;

                        rowIndex++;
                    }
                    dtCurrentTable.Rows.Add(drCurrentRow);
                    ViewState["CurrentTable"] = dtCurrentTable;

                    Gridview1.DataSource = dtCurrentTable;
                    Gridview1.DataBind();
                }
            }
            else
            {
                Response.Write("ViewState is null");
            }

            //Set Previous Data on Postbacks
            SetPreviousData();
        }
        private void SetPreviousData()
        {
            int rowIndex = 0;
            if (ViewState["CurrentTable"] != null)
            {
                DataTable dt = (DataTable)ViewState["CurrentTable"];
                if (dt.Rows.Count > 0)
                {
                    if (dt.Rows.Count==1)
                    {
                        LinkButton lb = (LinkButton)Gridview1.Rows[0].FindControl("LinkButton1");
                        lb.Enabled = false;

                    }
                    for (int i = 0; i < dt.Rows.Count; i++)
                    {
                        TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("TextBox1");
                        TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("TextBox2");
                        TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("TextBox3");

                        box1.Text = dt.Rows[i]["Column1"].ToString();
                        box2.Text = dt.Rows[i]["Column2"].ToString();
                        box3.Text = dt.Rows[i]["Column3"].ToString();

                        rowIndex++;
                    }
                }
            }
        }
        protected void ButtonAdd_Click(object sender, EventArgs e)
        {
            AddNewRowToGrid();
        }
        protected void LinkButton1_Click(object sender, EventArgs e)
        {
            LinkButton lb = (LinkButton)sender;
            GridViewRow gvRow = (GridViewRow)lb.NamingContainer;
            int rowID = gvRow.RowIndex;
            if (ViewState["CurrentTable"] != null)
            {

                DataTable dt = (DataTable)ViewState["CurrentTable"];
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    //extract the TextBox values
                    TextBox box1 = (TextBox)Gridview1.Rows[i].Cells[1].FindControl("TextBox1");
                    TextBox box2 = (TextBox)Gridview1.Rows[i].Cells[2].FindControl("TextBox2");
                    TextBox box3 = (TextBox)Gridview1.Rows[i].Cells[3].FindControl("TextBox3");


                    dt.Rows[i]["Column1"] = box1.Text;
                    dt.Rows[i]["Column2"] = box2.Text;
                    dt.Rows[i]["Column3"] = box3.Text;

                }
                if (dt.Rows.Count > 1)
                {
                  
                    if (gvRow.RowIndex <= dt.Rows.Count - 1)
                    {
                        //Remove the Selected Row data and reset row number  
                        dt.Rows.Remove(dt.Rows[rowID]);
                        ResetRowID(dt);
                    }
                }

                //Store the current data in ViewState for future reference  
                ViewState["CurrentTable"] = dt;

                //Re bind the GridView for the updated data  
                Gridview1.DataSource = dt;
                Gridview1.DataBind();
            }

            //Set Previous Data on Postbacks  
            SetPreviousData();
        }

        private void ResetRowID(DataTable dt)
        {
            int rowNumber = 1;
            if (dt.Rows.Count > 0)
            {
                foreach (DataRow row in dt.Rows)
                {
                    row[0] = rowNumber;
                    rowNumber++;
                }
            }
        }

Result :

Best Regards,

Nan Yu

MSDN Community Support
Please remember to "Mark as Answer" the responses that resolved your issue.

Reply

asp.ambur

Member

399 Points

1101 Posts

Re: gridview current row delete

Nov 01, 2016 10:00 AM|asp.ambur|LINK

on add new row

error

row arrangement cannot be null parameter name row

gridview current row delete [Answered]RSS

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