Question

Using VB.Net (Windows Application)

I am using checkbox in the girdview column, now i want to add a checkbox in the header.

If i select the checkbox in the header, all the checkbox in the column should select automatically.

How to do this.

Need VB.Net Code Help

Answer 1

Protected Sub chkbSelectAll_CheckedChanged(sender As Object, e As EventArgs)
    Dim chkFlag As Boolean = False
    If chkbSelectAll.Checked Then
        chkFlag = True
    End If
    For Each dr As GridViewRow In gvProducts.Rows
        Dim chk As CheckBox = DirectCast(dr.Cells(0).FindControl("Select"), CheckBox)
        chk.Checked = chkFlag
    Next
End Sub

I’m not sure this code is well-written. I just convert from this C# code (which is working);

protected void chkbSelectAll_CheckedChanged(object sender, EventArgs e)
    {
        bool chkFlag = false;
        if (chkbSelectAll.Checked) chkFlag = true;
        foreach (GridViewRow dr in gvProducts.Rows)
        {
            CheckBox chk = (CheckBox)dr.Cells[0].FindControl("Select");
            chk.Checked = chkFlag;
        }
    }

Algorithm is simple. Define a boolean value for checking checkboxes are selected or not. If checked assign it true. for all gridview rows, find controls with columns name then set them all.