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<asp:CheckBox  ID = "CheckBox1" AutoPostBack = "true" OnCheckedChanged = "CheckBox1_Checked" runat = "server"/>
 protected void CheckBox1_Checked(object sender, EventArgs e)
    {
        CheckBox cb = (CheckBox)sender;
        int index = ((GridViewRow)(cb.NamingContainer)).RowIndex;
        if (cb.Checked)
        {
            gridView.Rows[index].BackColor = Color.BurlyWood;
        }
        else
        {
            gridView.Rows[index].BackColor = gridView.RowStyle.BackColor;
        }
    }
    protected void CheckAllBox_Checked(object sender, EventArgs e)
    {
        if (CheckAll.Checked)
        {
            for (int i = 0; i < gridView.Rows.Count; i++)
            {
                CheckBox cb = (CheckBox)gridView.Rows[i].FindControl("CheckBox1");
                if (!cb.Checked)
                {
                    cb.Checked = true;
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