Hi, I am developing a web application using asp.net, c#.
I have simple gridview control having dropdown in it. in gridview rowdatabound event, i call dropdown selected index changed event. there i get gridview row but exception comes.
My code is below.
protected void gridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
table1 obj = e.Row.DataItem as table1;
DropDownList ddldepartment = e.Row.FindControl("ddldepartment ") as DropDownList;
/// Bind Dropdownlists
#region DDL Department
ddldepartment.DataSource = new x_SystmController().GetAllDepartments();
ddldepartment.DataTextField = "Title";
ddldepartment.DataValueField = "PK_id";
ddldepartment.DataBind();
ddldepartment.Items.Insert(0, new ListItem("--- Select ---", "0"));
#endregion
if (obj.fk_department_id > 0)
{
ddldepartment.SelectedValue = obj.fk_department_id.ToString();
ddlSystem_SelectedIndexChanged(this, new EventArgs()); // It will call the index changed event of ddl written below
}
}
protected void ddlDepartment_SelectedIndexChanged(object sender, EventArgs e)
{
GridViewRow gvr = (GridViewRow)(((Control)sender).NamingContainer); // Here i get null value
Label lbName = gvr.FindControl("lbName") as Label; // Here exception comes object reference is not set to the instance
}
Please help....
Thanks in advance..!!!!