protected void Button_Insert_Click(object sender, EventArgs e)
 {
     if (IsValid)
     {
         ObjectDataSource_Topic.InsertParameters["Top_Name"].DefaultValue = TextBox_Topic_Name.Text;
         ObjectDataSource_Topic.InsertParameters["Crs_Id"].DefaultValue   = DropDownList1.SelectedValue;
         ObjectDataSource_Topic.Insert();
     }
 }
 protected void Page_Load(object sender, EventArgs e)
 {
     if (Session["Role"].ToString() != "Student")
     {
         Response.Redirect("../Anonymous/ErrorPage.aspx");
     }
     if (!Page.IsPostBack)
     {
         ObjectDataSource_Topic.SelectParameters["Crs_Id"].DefaultValue = ((Label)GridView_Crs.Rows[0].Cells[0].FindControl("Label_Crs_Id")).Text;
         ObjectDataSource_Topic.Select();
     }
 }
 protected void GridView1_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)
 {
     ObjectDataSource_Topic.SelectParameters["Crs_Id"].DefaultValue = ((Label)GridView_Crs.Rows[e.NewSelectedIndex].Cells[0].FindControl("Label_crs_id")).Text;
     ObjectDataSource_Topic.Select();
 }
 protected void DropDownList1_SelectedIndexChanged1(object sender, EventArgs e)
 {
     ObjectDataSource_Topic.SelectParameters["Crs_Id"].DefaultValue = DropDownList1.SelectedValue;
     ObjectDataSource_Topic.Select();
 }