there is no error but cmd query take input as -1.

please check the error

protected void dgrd_DeleteCommand(object source, DataGridCommandEventArgs e)

{

con = new SqlConnection(s);

// cmd = new SqlCommand("delete from section where sectionid='" + dgrd.DataKeys[e.Item.ItemIndex].ToString()+"'", con);

// cmd = new SqlCommand("delete from section where sectionid='" + dgrd.SelectedIndex.ToString()+"'", con);

cmd = new SqlCommand("delete from section where sectionid='" + dgrd.Items.ToString() + "'", con);

con.Open();

// int rows = cmd.ExecuteNonQuery();

//if (rows > 0)

//{

Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "Deleted", "");

bid();

//}

}