How can I add option groups in ASP.NET drop down list?

Question

I have a requirement of grouping the drop down list options in ASP.NET drop down server control. Do you have any idea to how to approach the issue? I am new to ASP.NET.

Answer 1

1) Add the dropdownlist adapter class from here to your project

2) Add App_Browsers folder to your project(right click on project => Add => Add ASP.NET folder => App_Browsers)

3) Add a browser file into App_Browsers page and add the following code below inside browsers tag.

refId = WebKit supports chrome and safari browsers

4) Then you can add items to your dropdownlist ListItem item1 = new ListItem("Smith Street", "1"); item1.Attributes["OptionGroup"] = "Darwin";

            ListItem item2 = new ListItem("Mitchel Street", "1");
            item2.Attributes["OptionGroup"] = "Darwin";

            ListItem item3 = new ListItem("Hunter Street", "2");
            item3.Attributes["OptionGroup"] = "Sydney";

            ListItem item4 = new ListItem("BroadwaY", "4");
            item4.Attributes["OptionGroup"] = "Sydney";

            venuedropdown.Items.Add(item1);
            venuedropdown.Items.Add(item2);
            venuedropdown.Items.Add(item3);
            venuedropdown.Items.Add(item4);