Set data to a label in GridView - asp.net

Question

I have a label in an asp GridView and I want to set bind data to it.
Here is my RowDataBound method:
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
var name = (Label)e.Row.FindControl("Label_name");
name.Text ="sara";
name.DataBind();
}
and here is my GridView:
<asp:GridView ID="GridViewCertificateType" runat="server" AutoGenerateColumns="False" OnRowDataBound="GridView1_RowDataBound" >
<asp:Label ID="Label_name" runat="server" Text="" ></asp:Label>
But after name.Text ="sara";, I receive this exception:
Object reference not set to an instance of an object.

Answer 1

In your RowDataBound method, make sure you have a condition to check what the type of the row is. This event will be called for every row in your GridView, including header and footer rows. If Label_name is not found in the header row, you'll have a null object. Once you do that, get rid of name.DataBind();, as it is not needed.
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
var name = (Label)e.Row.FindControl("Label_name");
name.Text = "sara";
}
}

Answer 2

try this
var name= (Label)e.Row.Cells[X].FindControl("Label_name");
name.Text ="sara";
name.DataBind();
X means index of column