ASP.NET Web Forms - SortedList Object
The SortedList object combines the features of the ArrayList object and the Hashtable object.
Try It Yourself - Examples
SortedList Object
The SortedList object contains items represented as key/value pairs. The SortedList object automatically sorts items alphabetically or numerically.
Add items to the SortedList using the Add() method. Adjust the SortedList to its final size using the TrimToSize() method.
The following code creates a SortedList object named mycountries and adds four elements:
Data Binding
The SortedList object can automatically generate text and values for the following controls:
asp:RadioButtonList
asp:CheckBoxList
asp:DropDownList
asp:Listbox
To bind data to a RadioButtonList control, first create a RadioButtonList control in the .aspx page (without any asp:ListItem elements):
Then add the script to create the list and bind the values from the list to the RadioButtonList control:
Next, add a subroutine that will be executed when the user clicks an item in the RadioButtonList control. When a radio button is clicked, a line of text will appear in the label: