DropDown List With OptGroup Support

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Introduction

This tip shows you how to add OptGroup support to your dropdown list control.

Using the Code

1. Download the file in the attachment & add the two folders App_Browser & App_Code to your project.
2. After that, use the following code to create & populate your dropdown List control.
   
   C#

   //To bind data to dropDown Use ListItem
   
   ListItem item1 = new ListItem("A", "1");
   item1.Attributes["OptionGroup"] = "Alphabet";
    
   ListItem item2 = new ListItem("B", "2");
   item2.Attributes["OptionGroup"] = "Alphabet";
    
   ListItem item3 = new ListItem("One", "3");
   item3.Attributes["OptionGroup"] = "Numbers";
    
   ListItem item4 = new ListItem("Two", "4");
   item4.Attributes["OptionGroup"] = "Numbers";
        
   ddlItems.Items.Add(item1);
   ddlItems.Items.Add(item2);
   ddlItems.Items.Add(item3);
   ddlItems.Items.Add(item4);