not finding id gridview in asp.net

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Hello friends,

I am using this code to gatch the value in id from a grid view.but i am getting an error(Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index)Here in mu code check box is working but i not getting the value id the id of the row.please help me out , where i am going wrong.And plese do not be angry if you are getting problem in understanding, my english is not so good.

ASP.NET

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
            BackColor="White" BorderColor="White" BorderStyle="Ridge" BorderWidth="2px" 
            CellPadding="3" CellSpacing="1" GridLines="None">
            <footerstyle backcolor="#C6C3C6" forecolor="Black" />
            <rowstyle backcolor="#DEDFDE" forecolor="Black" />
            <columns>
            <asp:TemplateField HeaderText="Select">
                                <itemtemplate>
                                    <asp:CheckBox ID="chk" runat="server" />
                                </itemtemplate>
            
                <asp:BoundField HeaderText="id" DataField="id" />
                
                <asp:BoundField HeaderText="Question" DataField="Question" />
                
                <asp:BoundField DataField="Option1" HeaderText="Option1" />
                
                <asp:BoundField DataField="Option2" HeaderText="Option2" />
                <asp:BoundField DataField="Option3" HeaderText="Option3" />
                <asp:BoundField DataField="Option4" HeaderText="Option4" />
                <asp:BoundField DataField="Correct" HeaderText="Answer" />
            </columns>
            <pagerstyle backcolor="#C6C3C6" forecolor="Black" horizontalalign="Right" />
            <SelectedRowStyle BackColor="#9471DE" Font-Bold="True" ForeColor="White" />
            <HeaderStyle BackColor="#4A3C8C" Font-Bold="True" ForeColor="#E7E7FF" />

Dfault.aspx.cs code

C#

 for (int num = 0; num &lt; i; num++)
       {

     CheckBox chk_box = (CheckBox)GridView1.Rows[num].FindControl("chk");
     string ques_id=GridView1.DataKeys[num].Values["id"].ToString();
           if (chk_box.Checked == true)
           {
            // code
           }
}

</pre>

Posted 27-Apr-12 22:57pm

kadiyan1

Updated 27-Apr-12 23:23pm

Mohamed Mitwalli

v5

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Rahul Rajat Singh · Answer 1 · 2012-04-27T23:13:00

Solution 1

Looks like you are iterating more times then number of rows in grid view. Use foreach instead and the problem should not come.

Posted 27-Apr-12 23:13pm

Rahul Rajat Singh

Member 8415426 · Answer 2 · 2012-04-27T23:15:00

change your bound field to <asp:templatefield xmlns:asp="#unknown"> and label in item template.after that try this on your cs page...

C#

foreach (GridViewRow gr in Gridview1.Rows)
       {
           CheckBox chk = (CheckBox)gr.FindControl("CheckBox1");
           if (chk.Checked == true)
           {
               Label lbl = (Label)gr.FindControl("label1"); // id of label from which tou want to fetch values
            //code
           }
       }</asp:templatefield>