Check a CheckBoxField from code behind file

Question

It seems CheckBoxField won\'t accept an ID property, so I can\'t directly call the component in the code behind file.

Answer 1

In syour design view go to gridview edit columns and select the column and click convert to template field

    <asp:TemplateField HeaderText="Midmarket" SortExpression="Midmarket_Flag">
        <ItemTemplate>
            <asp:CheckBox ID="CheckBox1" runat="server" OnCheckedChanged ="CheckBox_CheckedChanged"
                Checked='<%# Bind("Midmarket_Flag") %>' Enabled="false" />
        </ItemTemplate>
    </asp:TemplateField>

Now you can add click event as above and your event something like below

protected void CheckBox_CheckedChanged(object sender, EventArgs e)
{
    try
    {
        CheckBox cb = sender as CheckBox;
        GridViewRow gr = cb.Parent.Parent as GridViewRow;
        string key = GridView1.DataKeys[gr.DataItemIndex].Value.ToString();
    }
    catch (Exception exc)
    {
    }
}

Answer 2

use

<asp:CheckBox ID="youid" runat="server" />

this way you can access it from your code behind

youid.Checked = true;