Why is DropDownList passing ID on postback, but not SelectedItem.Text?

Question

0.00/5 (No votes)

See more:

Here's the aspx:

ASP.NET

<asp:DropDownList ID="LocationSearch" Width="99%" AutoPostBack="true" OnSelectedIndexChanged="SearchTerms_Changed" runat="server" />

... and here's the code-behind:

C#

protected void SearchTerms_Changed(object sender, EventArgs e)
{
    DropDownList thisDdl = (DropDownList)sender;
    string id = thisDdl.ID;
    string newVal = thisDdl.SelectedItem.Text;

    Session["Pass"] = newVal;
}

When I run this through the debugger and break on setting the session variable, ID contains the correct DropDownList ID, but the SelectedItem.Text always belongs to the first entry in the DropDownList. There are no duplicated items. Does anyone know why?

Posted 25-Aug-14 7:27am

MattFFunke

Add a Solution

Comments

Wombaticus 25-Aug-14 14:25pm

Are you re-binding your dropdownlist items in page_Load on postback? It should work otherwise.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

_Amy · Answer 1 · 2014-08-25T17:49:00

Solution 1

Bind your DropDown in !Page.IsPostBack property.

C#

private void Page_Load()
{
    if (!IsPostBack)
    {
        // Bind dropdwon here..
    }
}

--Amy

Posted 25-Aug-14 17:49pm

_Amy