required field validator on group of checkbox RSS

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  SuchiSayami

  Member

  54 Points

  102 Posts

  required field validator on group of checkbox

  May 29, 2012 05:53 PM|LINK

  Hi,

  I am getting hard time using required field validator in the radio buttons which are under the gridview. My codes is like this:

  <asp:GridView ID="gViewEval" runat="server" AutoGenerateColumns="False" Visible="true">
          <Columns>
          <asp:TemplateField >
              <HeaderTemplate>
                  <asp:Label ID="lblQHeader" runat="server" Text="Columns/Row" />
              </HeaderTemplate>
              <ItemTemplate>
                  <asp:Label ID="lblQDetails" runat="server" Text = '<%# DataBinder.Eval(Container.DataItem,"text") %>' />
              </ItemTemplate>
          </asp:TemplateField>
          <asp:TemplateField >
              <HeaderTemplate>
                  <asp:Label ID="lbltxt1" runat="server" Text = 'text1'/>
              </HeaderTemplate>
              <ItemTemplate >
                  <asp:RadioButtonList ID="radA" runat="server" >
                  <asp:ListItem Value = "1" Text="" />
                  </asp:RadioButtonList>
                  
              </ItemTemplate>
          </asp:TemplateField>
          <asp:TemplateField >
              <HeaderTemplate>
                  <asp:Label ID="text2" runat="server" Text = 'text2'/>
              </HeaderTemplate>
              <ItemTemplate>
                  <asp:RadioButtonList ID="radA" runat="server">
                  <asp:ListItem Value = "2" Text="" />
                  </asp:RadioButtonList>
              </ItemTemplate>
          </asp:TemplateField>
              <asp:TemplateField >
              <HeaderTemplate>
                  <asp:Label ID="text3" runat="server" Text = 'text3'/>
              </HeaderTemplate>
              <ItemTemplate >
                  <asp:RadioButtonList ID="radA" runat="server">
                  <asp:ListItem Value = "3" Text="" />
                  </asp:RadioButtonList>
              </ItemTemplate>
          </asp:TemplateField>
              <asp:TemplateField >
              <HeaderTemplate>
                  <asp:Label ID="text4" runat="server" Text = 'text4'/>
              </HeaderTemplate>
              <ItemTemplate >
                  <asp:RadioButtonList ID="radA" runat="server">
                  <asp:ListItem Value = "4" Text="" />
                  </asp:RadioButtonList>
              </ItemTemplate>
          </asp:TemplateField>
              <asp:TemplateField >
              <HeaderTemplate>
                  <asp:Label ID="text5" runat="server" Text = 'text5'/>
              </HeaderTemplate>
              <ItemTemplate >
                  <asp:RadioButtonList ID="radA" runat="server">
                  <asp:ListItem Value = "5" Text="" />
                  </asp:RadioButtonList>
                 <asp:RequiredFieldValidator ID="rfv" runat="server" ControlToValidate="radAns"
                          ErrorMessage="atleast one radio buttons should be selected in each row" CssClass="valError"
                          Display="Dynamic" ForeColor="">!</asp:RequiredFieldValidator>
              </ItemTemplate>
          </asp:TemplateField>
          </Columns>
            
      </asp:GridView>

  I wanted to add requiredFieldValidator on those radiobuttons. So I put "rfv" as requiredFieldValidator but it gave error when i ran the program. Error is:

  Exception Details: System.Web.HttpException: Multiple controls with the same ID 'radA' were found. FindControl requires that controls have unique IDs.

  
  If that is not the right way, how can we put requiredFieldValidator in this scenario?

  Please help.

  
  
  

  Suchita
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  amosCabanban...

  Member

  441 Points

  142 Posts

  Re: required field validator on group of checkbox

  May 29, 2012 06:04 PM|LINK

  The error youre getting is because you have multiple radiobutton lists with the same ID. Simple rename the ID's of each radiobutton list in your templates with a unique name.  Or if you need to create them dynamically, remove the ID field and let Visual studio create them for you, specify the ClientIDMode = Predictable.

• • Reply
  

  SuchiSayami

  Member

  54 Points

  102 Posts

  Re: required field validator on group of checkbox

  May 29, 2012 06:08 PM|LINK

  I am using the gridview and it is pulling data from the database. The number of rows in the gridview is unknown and since it is based on the database value, the radio button is dynamic. So i am using one radio button and the values are in the group. And the way I can use radiobutton in the different cells of the gridview is by using radio button with the same IDs. but how would i be able to use required field validator in this case?

  Suchita
• • Reply
  

  amosCabanban...

  Member

  441 Points

  142 Posts

  Re: required field validator on group of checkbox

  May 29, 2012 06:27 PM|LINK

  This is a snippet on a project I created with dynamic controls.  See if it applies to you

   public void CreateAnswers(UserControl userControl, QUESTION question, IEnumerable<ANSWER> answers, Control control, string extension = "")
          {
              var controlType = question.QUESTION_TYPE;
   
              var getTypeByStringName = TypeMapper(controlType);
              if (getTypeByStringName != null)
              {
                  var newControl = Activator.CreateInstance(getTypeByStringName);
                  var castedControl = newControl as Control;
                  if (castedControl != null)
                  {
                      if (castedControl is DropDownList)
                      {
                          var dropDown = castedControl as DropDownList;
   
                          //in cases where the relationship is 1:N e.g a user is to its employment history
                          //dynamically set the controlID with an extension string
                          //e.g 24-2, 24-2, 24-2 (24 is the control id plus the extension)
                          //e.g 25-3. 25-3, 25-3 (25 is the control id plus the extension)
                          //else use the default naming scheme which is the question ID only
                          
                          dropDown.ID = string.IsNullOrEmpty(extension)
                                            ? question.Q_ID.ToString()
                                            : string.Format("{0}{1}", question.Q_ID, extension);
   
       
                          foreach (var answer in answers)
                          {
                              dropDown.Items.Add(new ListItem {Text = answer.ANSWER_TEXT, Value = answer.VALUE});
                          }
   
                          dropDown.ClientIDMode = ClientIDMode.Static;
                          dropDown.Items.Insert(0, new ListItem { Text = "Select", Value = "" });
                          dropDown.Items.FindByText("Select").Selected = true;
                          dropDown.CssClass = "answerCss";
                          control.Controls.Add(dropDown);
   
                          if (question.REQUIRED == "Y") CreateValidator(dropDown, control,userControl,extension);
                          if (question.CONTINGENT_Q.HasValue) dropDown.Visible = false;
   
                      }
                      else if (castedControl is RadioButtonList)
                      {
                          var radioButtonList = castedControl as RadioButtonList;
                          radioButtonList.ID = string.IsNullOrEmpty(extension)
                                            ? question.Q_ID.ToString()
                                            : string.Format("{0}{1}", question.Q_ID, extension);
                          radioButtonList.SelectedIndexChanged += rbl_SelectedIndexChanged;
                          radioButtonList.AutoPostBack = true;

                          foreach (var answer in answers)  /// THIS IS PROBABLY WHAT YOURE LOOKING FOR
                          {
                              radioButtonList.Items.Add(new ListItem { Text = answer.ANSWER_TEXT, Value = answer.A_ID.ToString() });
                          
                          }
                          radioButtonList.ClientIDMode = ClientIDMode.Static;
                          radioButtonList.CssClass = "answerCss";
                          control.Controls.Add(radioButtonList);
   
                          if (question.REQUIRED == "Y") CreateValidator(radioButtonList, control,userControl,extension);
                      
                      }
                      else if (castedControl is TextBox)
                      {
                          var textBox = castedControl as TextBox;
                          textBox.ClientIDMode = ClientIDMode.Static;
                          textBox.ID = string.IsNullOrEmpty(extension)
                                            ? question.Q_ID.ToString()
                                            : string.Format("{0}{1}", question.Q_ID, extension);
                          textBox.CssClass = "answerCss";
                          control.Controls.Add(textBox);
   
                          if (question.REQUIRED == "Y") CreateValidator(textBox, control,userControl,extension);
                      }
                      else if (castedControl is Calendar)
                      {
                          var calendar = castedControl as Calendar;
                          calendar.ClientIDMode = ClientIDMode.Static;
                          calendar.ID = string.IsNullOrEmpty(extension)
                                     ? question.Q_ID.ToString()
                                     : string.Format("{0}{1}", question.Q_ID, extension);
                          calendar.CssClass = "answerCss";
                          control.Controls.Add(calendar);
                     
                      }
                      else if (castedControl as Label != null)
                      {
                          var label = castedControl as Label;
                          label.ClientIDMode = ClientIDMode.Static;
                          label.ID = string.IsNullOrEmpty(extension)
                                            ? question.Q_ID.ToString()
                                            : string.Format("{0}{1}", question.Q_ID, extension);
                          label.CssClass = "answerCss";
                          control.Controls.Add(label);
                   
                      }
                  }
              }
          }
  

   /// <summary>
          /// This method creates the required field validator based on the REQUIRED field of a given question
          /// </summary>
          /// <param name="controlToValidate">the dynamically created control that needs to be validated</param>
          /// <param name="parentControl">the parent container control</param>
          private static void CreateValidator(Control controlToValidate,Control parentControl, UserControl userControl, string extension)
          {
   
              var rfv = new RequiredFieldValidator
                            {
                                ClientIDMode = ClientIDMode.Static,
                                ID = String.Format("rfv{0}", controlToValidate.ClientID),
                                ControlToValidate = controlToValidate.ID,
                                Display = ValidatorDisplay.Static,
                                Text = "*Required Field",
                                ErrorMessage = "Required field: " + controlToValidate.ID + " is empty",
                                ForeColor = System.Drawing.Color.Red,
   
                                //set the validation group as the name of the usercontrol if there is no extension, otherwise append the extension
                                ValidationGroup = string.IsNullOrEmpty(extension) ? userControl.ClientID : string.Format("{0}{1}",userControl.ClientID,extension)
                                
                            };
              parentControl.Controls.Add(rfv);
          }

  • Edited by amosCabanban86 on May 29, 2012 06:28 PM
• • Reply
  

  SuchiSayami

  Member

  54 Points

  102 Posts

  Re: required field validator on group of checkbox

  May 29, 2012 06:59 PM|LINK

  Is there any way I can do it using gridview?

  Suchita
• • Reply
  

  Qin Dian Tan...

  All-Star

  113532 Points

  12480 Posts

  Microsoft

  Re: required field validator on group of checkbox

  May 31, 2012 08:57 AM|LINK

  Hi,

  Why do you use several RadioButtonLists for only one option each? I think you can just use one RadioButtonList with 5 options in ListItems. Then the error will go.

  Thanks,

  Please mark the replies as answers if they help or unmark if not.
  If you have any feedback about my replies, please contactmsdnmg@microsoft.com.
  Microsoft One Code Framework
  • Marked as answer by Qin Dian Tang - MSFT on Jun 05, 2012 01:32 AM