Multi check box drop down list

Question

0.00/5 (No votes)

See more:

Hi All,
I have created a web user control for multi check drop down list.
Here is code snippet:

C#

<asp:TextBox ID="txtCombo" runat="server" ReadOnly="true" Text="--Select--" CssClass="DropDownCss" BackColor="#EEEEEE" Width="225" Height="25" ></asp:TextBox>
<cc1:PopupControlExtender ID="PopupControlExtender111"  runat="server" 
    TargetControlID="txtCombo" PopupControlID="Panel111" Position="Bottom" >
</cc1:PopupControlExtender>

<input type="hidden" name="hidVal" id="hidVal" runat="server" />

<asp:Panel ID="Panel111" runat="server"  Width="230" BackColor="#EEEEEE" BorderColor="Gray" BorderWidth="1">
    
    <asp:CheckBoxList ID="chkList" 
        runat="server" 
        Height="150" onclick="CheckItem(this)">                                                                                                                                                                        
    </asp:CheckBoxList>
    
</asp:Panel>

The control is getting bind and showing values but when page is getting postback the control is getting reinitialize.

How to keep current selected values even if page is postback.

Please suggest

Thanks and Regards,
Avinash

Posted 19-Feb-15 0:09am

Avinash6474

Add a Solution

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)

John C Rayan · Accepted Answer · 2015-02-19T00:18:00

Solution 1

SQL

Loading of your checklist should check Page.isPostBack property and it not PostBack then load it.

if(!Page.isPostBack){
// load your checklist
}

Posted 19-Feb-15 0:18am

John C Rayan

Updated 19-Feb-15 0:19am

v2

Comments

Avinash6474 19-Feb-15 6:24am

Thanks for your immediate response..
The value loaded in this control are dependent on another drop down selected value. So on dropDown1_selectedIndexChange the values are bind with dropDowncheckListBox.

Now when there is any action happening on page ex: any other drop down selection the page is getting post back and value resetting.

John C Rayan 19-Feb-15 6:34am

wherever you load your values , do the postback check and you will be fine.

Avinash6474 19-Feb-15 7:30am

I got your point.
Thank you so much :)
-Avinash

John C Rayan 19-Feb-15 7:46am

Glad I could help you. Please mark the solution as accepted if you haven't already done so.