Question

 <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
 <asp:Button ID="Button1" runat="server" UseSubmitBehavior="false"   
             OnClick="Button1_Click" OnClientClick="this.disabled = true; this.value = 'Submitting...'; " 
             Text="Click Me…" /></div>
 <asp:DropDownList ID = "dListFruits" runat ="server" EnableViewState ="true"></asp:DropDownList>

protected void Page_Load(object sender, EventArgs e)
{
    ArrayList aList = new ArrayList();
    aList.Add("Apples");
    aList.Add("Oranges");
    if (!Page.IsPostBack)
    {
        dListFruits.DataSource = aList;
        dListFruits.DataBind();

        TextBox1.Text = "Hi";
    }
}
protected void Button1_Click(object sender, EventArgs e)
{

}

When i had a break point in a button click event , this peice of statement “dListFruits.DataSource” shows null while debugging. I thought view state will be applied before load event triggered. But when i see the page items are appended into the dropdown list. So view state will be applied just before render?

Answer 1

Just check out the Items collection of the dropdownlist. Viewstate stores the items collection of dropdownlist control.