problems with selecting values from dropdowjn boxes

wrexhamafc234 · Dec 18, 2006

Hello,
im having some problems selecting values from dropdown boxes:

Code:

<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "[URL unfurl="true"]http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">[/URL]

<script runat="server">
    protected void AddToList()
    {
        DropDownList1.Items.Clear();
        DropDownList2.Items.Clear();

        ListItem item1 = new ListItem();
        ListItem item2 = new ListItem();

        item1.Text = "0";
        item1.Value = "0";
        DropDownList1.Items.Add(item1);
        DropDownList2.Items.Add(item1);

        item2.Text = "1";
        item2.Value = "1";
        DropDownList1.Items.Add(item2);
        DropDownList2.Items.Add(item2);
    }
    
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            AddToList();
        }
        
        DropDownList1.SelectedIndex = 1;
        DropDownList1.DataBind();

        DropDownList2.SelectedIndex = 0;
        DropDownList2.DataBind();
    }
</script>

<html xmlns="[URL unfurl="true"]http://www.w3.org/1999/xhtml"[/URL] >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True">
        </asp:DropDownList>
        <br />
        <asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="True">
        </asp:DropDownList>
    </div>
    </form>
</body>
</html>

Both dropdown selected values are exactly the same, they shouldnt be.
Any ideas why the code is not selecting the correct values?

dvannoy · Dec 18, 2006

why are you doubling your code???

dvannoy · Dec 18, 2006

sorry i mis-read it...

jbenson001 · Dec 18, 2006

Put these lines in your If(!IsPostBack) block:

DropDownList1.SelectedIndex = 1;
'' DropDownList1.DataBind();

DropDownList2.SelectedIndex = 0;
'' DropDownList2.DataBind();

Also, you don't need the databind event called. You are not binding any data to the ddls.

Jim

wrexhamafc234 · Dec 18, 2006

ok, ive changed my code to the following, however, still same error:

Code:

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            AddToList();
            DropDownList1.SelectedIndex = 1;
            DropDownList2.SelectedIndex = 0;
        }
    }

jbenson001 · Dec 18, 2006

do you are saying when the page first loads both ddls have the same selected index?

wrexhamafc234 · Dec 18, 2006

yes, both ddls have the same selected value (0). However, this should not be as im selecting different values:

Code:

DropDownList1.SelectedIndex = 1;
DropDownList2.SelectedIndex = 0;

e.g. in the above example, i want ddl1 to select 0 (selectedindex = 0) and ddl2 to select 1(selectedindex = 1).

jbenson001 · Dec 18, 2006

I am having the same issue on page load. Once that is done, there isn't a problem changing and getting the selected index. This is very strange. The only thing I can think of is that we are setting the same items to the each ddl and somehow they are linked, but why that is? I have no idea. I will see if I can find an answer. Post back if you figure it out.

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problems with selecting values from dropdowjn boxes

wrexhamafc234

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dvannoy

MIS

dvannoy

MIS

jbenson001

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wrexhamafc234

Programmer

jbenson001

Programmer

wrexhamafc234

Programmer

jbenson001

Programmer

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