Array List in Asp.Net 2.0

The ArrayList object is a collection of items containing a single data value. It is not a control but an object. Arraylist members can be added using Add() property

Like

ArrayList ArLst =  new ArrayList ();

ArLst.Add("Xpode");
ArLst.Add("World");
ArLst.Add("NoWayOut");

ArLst.Add("Xpode");
ArLst.Add("World");
ArLst.Add("NoWayOut");
ArLst.Sort()

if we want in reverse order then we will use Reverse Property

ArLst.Add("Xpode");
ArLst.Add("World");
ArLst.Add("NoWayOut");
ArLst.Sort()
ArLst.Reverse()

Now if we want to binds this with any thing then we will use this

GridView.DataSourse = ArLst;
GridView.DataBind();

There are many controls like given below who needs to assign the Text and Value Property Sepertatly, But with these controls ArrayList automatically generates the text and values to the following controls: * asp:RadioButtonList * asp:CheckBoxList * asp:DropDownList * asp:Listbox To Binde with these controls you need to just need to change the below code:

GridView.DataSourse = ArLst;
GridView.DataBind();

Change the Id of the control with GridView. By default, an ArrayList object contains 16 entries This was the static example, if we need to fill the arraylist from database dynamically then we need to write some code. The example is given below. This code is in Vb.Net

Dim MyArrayList as ArrayList 	
Dim sItem as String
Sub Page_Load(Source as Object, E as EventArgs)
MyArrayList=New Arraylist 
if not Page.IsPostBack then
Dim strConn as string = "server=YourServer;uid=UID;pwd=PWD;database=NorthWind"
Dim MySQL as string = "Select CategoryName from Categories"
Dim MyConn as New SQLConnection(strConn)
Dim objDR as SQLDataReader
Dim Cmd as New SQLCommand(MySQL, MyConn)
MyConn.Open()
	objDR=Cmd.ExecuteReader(system.data.CommandBehavior.CloseConnection)

While objDR.Read()
	MyArrayList.add(objDR("CategoryName")) 
End While	
end if
ddl1.datasource=MyArrayList
ddl1.databind

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