displaying selected dropdownlist string value in label

Question

0.00/5 (No votes)

See more:

i have a dropdownlist with a few entries in it. i have a label next to the dropdownlist that i'd like to have display the selected value.

i guess the twist in all of this is that i have a b.o. which is supposed to store the values and pass things on to the appropriate method and this is where i'd like the label to pull the selected value from so....

user selects value from ddl

selected value is then stored in the b.o. class/method

the label then retrieves the selected value from the b.o. and displays it proudly.

here's the code sort of...thank you very much for the help and sorry for the wall of junk and it's not perfect, but i think you get the general gist of what i'm trying to do...i just want to make verify that the right values are passing through, but it's not working.

when i try this out, the dropdownlist.selectedValue seems to be null

html

HTML

<div>
    <dropdownlist>
        <listitem VALUE = 'A'> A </>
        <listitem VALUE = 'B'> B </>
        <listitem VALUE = 'C'> C </>
    </dropdownlist>
    <label />
</div>

b.o.

C#

private string ddlValue
{
    selectedValue{get;set;}
}

codebehind

C#

ddlValue ddlV = new ddlValue();
ddlV.selectedValue = dropdownlist.SelectedValue.ToString(); //here trying to pass the value
label.Text = ddlV.selectedValue;

Posted 19-Dec-13 7:12am

memberxxxxxxxxxxxxxxxxx

Add a Solution

Comments

BillWoodruff 19-Dec-13 13:34pm

Where's the EventHandler for the DropDown selection change that will invoke the code ? 'ddlValue appears to be a property, why are you using the 'new operator as if you were creating an instance of a Class ?

bowlturner 19-Dec-13 13:49pm

not only that why doesn't the dropdownlist have a name? I'm pretty sure this ddlV.selectedValue = dropdownlist.SelectedValue.ToString(); won't work with out an actual name.

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)

Murugan Kolanji · Answer 1 · 2013-12-19T08:30:00

Check the below conditions:

i). Set AutoPostBack=True

ii). Handle the eventhandler for the DropDownlist.

For Example:

Design:

ASP.NET

<asp:dropdownlist runat="server" id="ddlTest" autopostback="True" onselectindexchanged="ddlTest_IndexChanged" xmlns:asp="#unknown" />

<asp:label runat="server" id="lblTest" xmlns:asp="#unknown" />

Code Behind:

protected void ddlTest_IndexChanged(Object sender, EventArgs e)
{
    lblTest.Text=ddlTest.SelectedValue.ToString();
}