How to select all checkbox in gridview?

Question

1.00/5 (1 vote)

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Below code doesn't work for select all checkbox. after clicking on select all checkbox,all checkboxes remain unchecked.

What I have tried:

ASP.NET

<asp:GridView ID="grdMember" runat="server" CellPadding="4" ForeColor="#333333" 
                GridLines="None" HorizontalAlign="Center">
                <columns>
                <asp:TemplateField HeaderText="Select All">
                <headertemplate>
                <asp:CheckBox ID="checkbox2" OnCheckedChanged="CheckAll" runat="server" />
                
                <itemtemplate>
                <asp:CheckBox ID="IDCheckbox" runat ="server" />

C#

protected void CheckAll(object sender, EventArgs e)
    {
        CheckBox chckheader = (CheckBox)grdMember.HeaderRow.FindControl("checkbox2");
        foreach (GridViewRow row in grdMember.Rows)
        {
            CheckBox chckrw = (CheckBox)row.FindControl("IDCheckbox");
            if (chckheader.Checked == true)
            {
                chckrw.Checked = true;

            }
            else
            {
                chckrw.Checked = false;
            }

        }
    }

Posted 25-Sep-18 19:31pm

Darsh12345

Updated 28-Sep-18 5:22am

v3

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Comments

Maciej Los 26-Sep-18 2:07am

And...
What's wrong with your code?

Vincent Maverick Durano 28-Sep-18 11:24am

The problem is that AutoPostback isn't set for the CheckBox, thus OnCheckChanged event never fires.

1 solution

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Vincent Maverick Durano · Answer 1 · 2018-09-28T05:23:00

Solution 3

Quote:
<asp:CheckBox ID="checkbox2" OnCheckedChanged="CheckAll" runat="server" />

Your CheckAll method will never get fired because you haven't set AutoPostback to True for your CheckBox. Set AutoPostback to true so the OnCheckedChanged event will fire.

ASP.NET

<asp:CheckBox ID="checkbox2" OnCheckedChanged="CheckAll" runat="server" AutoPostBack="True" />

Posted 28-Sep-18 5:23am

Vincent Maverick Durano

Comments

Maciej Los 28-Sep-18 11:30am

5ed!

Vincent Maverick Durano 28-Sep-18 11:33am

Thank you! :)