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Bind Multiple Drop Down Using User Control

1-First we create user control, 
  1. <%@ Control Language="C#" AutoEventWireup="true" CodeFile="Master_Data.ascx.cs" Inherits="Master_Data" %>  
  2. <div class="row">  
  3. <div class="col-xs-1">  
  4. </div>  
  5. <div class="col-xs-10">  
  6. <div class="col-xs-12">  
  7. <div class="form-group">  
  8. <div class="col-sm-12">  
  9. <asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1">  
  10. <ProgressTemplate>  
  11. <asp:Image ID="Image1" runat="server" ImageUrl="~/School/image/loading.gif" />  
  12. </ProgressTemplate>  
  13. </asp:UpdateProgress>  
  14. </div>  
  15. </div>  
  16. <div class="form-horizontal">  
  17. <div class="form-group">  
  18. <div class="col-sm-4 control-label no-padding-right">  
  19. <span class="red">*</span>Select Master Data :</div>  
  20. <div class="col-sm-8">  
  21. <asp:DropDownList ID="ddlMaster" runat="server" CssClass="form-control" ToolTip="Select Master"  
  22. OnSelectedIndexChanged="ddlMaster_SelectedIndexChanged" AutoPostBack="True">  
  23. </asp:DropDownList>  
  24. </div>  
  25. </div>  
  26. </div>  
  27. </div>   
method for bind combo of master page,
  1. public void BindMasterCombo(string Pramval)  
  2. {  
  3. try  
  4. {  
  5. M_Form_Buis objM_Form_Buis = new M_Form_Buis();  
  6. objM_Form_Buis.Name = Pramval;-----------------Parameter we pass from web form declared in below  
  7. objM_Form_Buis.GetdataDrop(ddlMaster);  
  8. ListItem itemMaster = new ListItem("--Select Master--", "0");  
  9. ddlMaster.Items.Insert(0, itemMaster);  
  10. }  
  11. catch (Exception ex)  
  12. {  
  13. }  
  14. }   
2-call user control from web pages, 
  1. <div class="portlet-body">  
  2. <asp:UpdatePanel ID="UpdatePanel1" runat="server">  
  3. <ContentTemplate>  
  4. <uc1:Master_Data ID="Master_Data1" runat="server" />  
  5. </ContentTemplate>  
  6. </asp:UpdatePanel>  
  7. </div>  
In page Load we call master page method for binding drop down,
  1. protected void Page_Load(object sender, EventArgs e)  
  2. {  
  3. try  
  4. {  
  5. // Session["User"]: this session is use to check whether user is login or logout  
  6. if (Session["User"] == null)  
  7. {  
  8. Response.Redirect("~/School/login.aspx");  
  9. }  
  10. if (!IsPostBack)  
  11. {  
  12. Master_Data1.BindMasterCombo("'Fee','FEEHR'");  
  13. }