When i Unchecked Child CheckBox then HeaderCheckBox is not Unchecked? What is the reason?

Question

0.00/5 (No votes)

See more:

Here Is C# Code..

C#

protected void ChkAll_CheckedChanged(object sender, EventArgs e)
    {
        CheckBox ChkAll = (CheckBox)GridView1.HeaderRow.FindControl("ChkAll");

        if (ChkAll.Checked == true)
        {
            for (int i = 0; i < GridView1.Rows.Count; i++)
            {
                CheckBox chk = (CheckBox)GridView1.Rows[i].FindControl("ChkOne");
                chk.Checked = true;

            }
        }
        else
        {
            for (int i = 0; i < GridView1.Rows.Count; i++)
            {
                CheckBox chk = (CheckBox)GridView1.Rows[i].FindControl("ChkOne");
                chk.Checked = false;

                ChkAll.Checked = false;
            }
        }
    }
}

THis is my ASPX Code

XML

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
     CssClass="data" Width="50%" AllowSorting="True" DataSourceID="dsDetails"
        AllowPaging="True" PageSize="5">
        <Columns>
            <asp:TemplateField>
                <HeaderTemplate>
                    <asp:CheckBox ID="ChkAll" runat="server" AutoPostBack="true" oncheckedchanged="ChkAll_CheckedChanged"/>
                </HeaderTemplate>
                <ItemTemplate>
                    <asp:CheckBox ID="ChkOne" runat="server" AutoPostBack="true"/>
                </ItemTemplate>
            </asp:TemplateField>

Posted 25-Feb-13 17:54pm

Arpit6016

Updated 25-Feb-13 18:53pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

v2

Add a Solution

Comments

Sanjeev Alamuri 26-Feb-13 0:44am

The reason is, there is no event for "ChkOne" CheckBox like "ChkAll". please write "OnCheckedChanged" for "ChkOne" and write the logic in that function.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 26-Feb-13 0:57am

Exactly...

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)

khalid92 · Accepted Answer · 2013-02-25T21:13:00

create this event on .cs page
-----------------------------

C#

protected void ChkOne_CheckedChanged(object sender, EventArgs e)
    {
            bool flag = true;
            for (int i = 0; i < GridView1.Rows.Count; i++)
            {
                CheckBox chk = (CheckBox)GridView1.Rows[i].FindControl("ChkOne");
                if(!chk.Checked)
                {
                  flag = false;
                  break;
                }
            }
          ((CheckBox)GridView1.HeaderRow.FindControl("ChkAll")).Checked = flag;

    }

replace item template code on .aspx page
----------------------------------------

XML

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
     CssClass="data" Width="50%" AllowSorting="True" DataSourceID="dsDetails"
        AllowPaging="True" PageSize="5">
 <asp:TemplateField>
                <HeaderTemplate>
                    <asp:CheckBox ID="ChkAll" runat="server" AutoPostBack="true" oncheckedchanged="ChkAll_CheckedChanged"/>
                </HeaderTemplate>
                <ItemTemplate>
                    <asp:CheckBox ID="ChkOne" runat="server" AutoPostBack="true" oncheckedchanged="ChkOne_CheckedChanged"/>
                </ItemTemplate>
            </asp:TemplateField>
</asp:GridView>