Question

In my grid view I’ve a checkbox column, and am binding the gridview with a dictionary. I need to get the corresponding Id from the checked boxes.

In my dictionary I’ve the key values like

Id         Name
--         ----
 1         Arts
 2         Science
 3         Engineering

Here, I tried to bind the value for this checkbox as

<asp:TemplateField>
    <ItemTemplate>
      <asp:CheckBox ID="chkSelItem" value="<%# Eval("Key.Id") %>" 
                                                       runat="server" />
    </ItemTemplate>
</asp:TemplateField>

<asp:TemplateField HeaderText="Department">
    <ItemTemplate>
         <%# Eval("Key.Name") %>
    </ItemTemplate>
    <HeaderStyle HorizontalAlign="Left" />
</asp:TemplateField>

and from the codebehind, I tried like

foreach (GridViewRow row in gridDepartments.Rows)
        {
            CheckBox chkSelItem = (CheckBox)row.FindControl("chkSelItem");

            if (chkSelItem.Checked)
            {
                int departmentId = int.Parse(chkSelItem.Text);
                ////
                ////                 
            }
        }

its throwing error, or not showing any value for the checkbox.

I also trid with FindControl, but no use of it, coz in the key & Value pair am using a class(which inherits another class) and a bool. thats what am trying like this, can anyone help me here, thanks in advance…..

Answer 1

You can try this one...

Bind id to lable instead of to checkbox as below.

<asp:TemplateField>     
<ItemTemplate>       
<asp:CheckBox ID="chkSelItem" runat="server" />     

<asp:Label ID="lblSelectedItem" value=<%# Eval("Key.Id")) %> visible="False"/>
</ItemTemplate> </asp:TemplateField>



In codebehind try this

foreach (GridViewRow row in gridDepartments.Rows)         
{             
      CheckBox chkSelItem = (CheckBox)row.FindControl("chkSelItem");
       Label lblSelectedItem= (Label)row.FindControl("lblSelectedItem");

      if (chkSelItem.Checked) 
      {
                 int departmentId = int.Parse(lblSelectedItem.Text); 
      }
} 



Hope this is what u want...