CheckBox SelectAll / DeselectAll

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My Grid is look like this..

col0         col1
checkbox     123
checkbox     234
empty row
checkbox     12

now what i'm try to do is i want to select All checkBox's and DeselectAll how to do...

i'm trying in the following way...

JavaScript

function CheckAll(oCheckbox) {
    var gdDocument = document.getElementById("<%=gdDocument.ClientID %>");

    for (i = 1; i < gdDocument.rows.length; i++) {
        gdDocument.rows[i].cells[0].getElementsByTagName("INPUT")[0].checked = oCheckbox.checked;
     }

}

C#

<HeaderTemplate>
     <input id="chkSelect" type="checkbox" onclick="CheckAll(this)" runat="server" />
 </HeaderTemplate>
 <ItemTemplate>
     <asp:CheckBox ID="chkSelect" runat="server"  />
 </ItemTemplate>

but for this code is working for each & everyrow have a record this code is working fine , but whenever the row checkbox is not visible ( false). In that case , from there onwords the checkbox's are not selected.

can anyone help me to resolve this issue...

Posted 29-Jan-13 18:59pm

Naveen.Sanagasetti

Updated 29-Jan-13 19:01pm

v2

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vinodkumarnie 30-Jan-13 1:38am

Handle checkbox not visible case in your code... If the checkbox is not visible skip that loop and go for next loop.

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AshishChaudha · Answer 1 · 2013-01-29T20:03:00

try the following code, its working fine for me

C#

protected void chekSelectALL_CheckedChanged(object sender, EventArgs e)
    {
        CheckBox chkA = GridView1.HeaderRow.FindControl("chekSelectALL") as CheckBox;
        foreach (GridViewRow gv in GridView1.Rows)
        {
            CheckBox chkS = gv.FindControl("chekSelect") as CheckBox;
            if (chkA.Checked)
            {
                chkS.Checked = true;
            }
            else
            {
                chkS.Checked = false;
            }
        }
    }