Checkboxlist loop is not working

Question

I have a dropdownlist control and a button in asp.net page. The dropdownlist is populated from a method. If I select any item other than the first item, after clicking the button, I lose the selected item in the DDL and it selects the first item and also I am getting the value of the first item only in the button click event. How can I fix the problem?

 <asp:DropDownList ID="userDropDown" runat="server" DataTextField="CustomerName"  DataValueField="CustomerId">
</asp:DropDownList>

protected void Button1_Click(object sender, EventArgs e)
{
if(!page.isPostBack)
{
    userDropDown.DataSource = CC.GetCustomers();
    userDropDown.DataBind();
}
}

It should be Page.IsPostBack (check case sensitivity). Also note that it should not be within Button1_Click event as button click is always Page.IsPostBack = true. Use Page_Load method instead. — Indi
– Indi, Commented Aug 23, 2013 at 17:16

Dhaval · Accepted Answer · 2013-08-23 15:47:43Z

2

i think you must have bind userDropDown in Page_Load event without condition if (!IsPostBack)

Please put dropdown binding part inside if (!IsPostBack) condition then it should work

answered Aug 23, 2013 at 15:47

Dhaval

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Velu · Accepted Answer · 2013-08-25 17:18:08Z

2

Please bind dropdownlist values inside the if(!ispostback){} or after submitting button please bind updated field to dropdownlistname.text

answered Aug 25, 2013 at 17:18

Velu

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Comments

Indi · Accepted Answer · 2013-08-23 15:54:50Z

0

It sounds like you are binding your DropdownList to your datasource at ever request. Instead bind it only if Page.IsPostBack is false like below; (You may not need ObjectDataSource)

protected void Page_Load(object sender, EventArgs e)
{
   if (!Page.IsPostBack)
   {
     //bind your datasource here (something like below)
     userDropDown.DataSource = GetCustomers();
     userDropDown.DataBind();
   }
}

As soon as DataBind() method is called it will lose posted data of that object and the FirstItem will be selected by default.

edited Aug 23, 2013 at 15:54

answered Aug 23, 2013 at 15:47

Indi

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