CheckBox is unchecked after Postback

Question

4.00/5 (1 vote)

See more:

Hi,
I am using check box in ItemTemplate(gridview) in User Control. I wrote some code in CheckedChanged event. It is Running. after completing the event my page is loading with uncheck checkbox.

XML

<asp:TemplateField ItemStyle-Width="4%">
                                        <ItemTemplate>
                                            <asp:CheckBox Width="10%" ID="chkDocumentName" runat="server" OnCheckedChanged="chkDocumentName_CheckedChanged" AutoPostBack="true"/>
                                        </ItemTemplate>
                                        <ItemStyle Width="3%" />
                                    </asp:TemplateField>

C#

protected void chkDocumentName_CheckedChanged(object sender, EventArgs e)
    {
        for (int i = 0; i < gvDocumentTemplatestatus.Rows.Count; i++)
        {
            CheckBox chkbox = (CheckBox)gvDocumentTemplatestatus.Rows[i].FindControl("chkDocumentName");
            if (chkbox.Checked == true)
            {
                Label lblTemplateId = (Label)gvDocumentTemplatestatus.Rows[i].FindControl("lblTempID");
                Label lblDocumentNumberID = (Label)gvDocumentTemplatestatus.Rows[i].FindControl("lblDocumentNumberID");
                 Label lblTemplateName = (Label)gvDocumentTemplatestatus.Rows[i].FindControl("lblTemplateName");
                 Session["rownumber"] = i.ToString();
                Session["TempID"] = lblTemplateId.Text;
                
            }
            else
            {
                if (Session["rownumber"] != null)
                {
                    if (Convert.ToInt32(Session["rownumber"].ToString()) == i)
                    {
                        strcolumnnumber = "0";
                        Session["SubJobID"] = strcolumnnumber;
                    }
                }
            }
        }
    }

This is my code after postback my check box is unchecked.

if any one know about this tell me.

Regards
Nanda Kishore.CH

Posted 6-Aug-12 0:43am

nandkishorre

Updated 6-Aug-12 0:49am

Vani Kulkarni

v3

Add a Solution

Comments

Sangramsingh Pawar 6-Aug-12 6:48am

check that your gridview not binds to datasource property when your checkbox checked

3 solutions

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)

Ganesh Nikam · Answer 1 · 2012-08-06T00:48:00

Solution 1

use update panel inside item template

i.e.

ASP.NET

<updatepanel>
<contenttemplate>
<asp:checkbox width="10%" id="chkDocumentName" runat="server" oncheckedchanged="chkDocumentName_CheckedChanged" autopostback="true" xmlns:asp="#unknown" />
</contenttemplate>
</updatepanel>

if still not working
then use asynchronous postback trigger with this updatepanel

Posted 6-Aug-12 0:48am

Ganesh Nikam

Updated 6-Aug-12 0:49am

v2

Comments

nandkishorre 6-Aug-12 7:05am

Still Not working

Aarti Meswania · Answer 2 · 2012-08-06T01:20:00

A solution is to add a hidden field to the page that represents the state of the checkbox, then update the field's value to "ON" or "OFF" for example, whenever the checkbox is clicked.

Then on the server you check the value of the hidden field, not the checkbox itself, as the hidden field is always posted.

Happy Coding!
:)

A Anto Johnson P Rayer · Answer 3 · 2014-01-29T23:15:00

hi,

This is because when postback occurs gridview recreates so we loose the previous state so it will come always unchecked so put the gridview binded code under page.ispostback

check the code where gridview is binded in page load it should be under the page.ispostback

if (!Page.IsPostBack)
{
bind gridview here
}

CheckBox is unchecked after Postback

3 solutions

Solution 1

Solution 2

Solution 3

Add your solution here

Preview 0