单击 某行 改变gridview色彩

单击 某行 改变gridview颜色
我想实现单击 某行 改变gridview这行的颜色  ，鼠标悬停和经过的已经改好了，但是鼠标click事件的颜色绑定不成功。总是显示鼠标经过的颜色。
cs
 protected void gwDataList_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        Button btnHiddenPostButton = e.Row.FindControl("btnHiddenPostButton") as Button;
        if (btnHiddenPostButton != null)
        {
            e.Row.Attributes["onclick"] = String.Format("javascript:document.getElementById('{0}').click()", btnHiddenPostButton.ClientID);
            e.Row.Attributes.Add("onmouseover", "this.style.background='red'");
            e.Row.Attributes.Add("onmouseout", "this.style.background='white'");
        }

    }

    protected void changegwDataListColor(object sender, EventArgs e)
    {
        if (tRowID.Text != "")
        {
             gwDataList.Rows[int.Parse(tRowID.Text)].BackColor = System.Drawing.Color.Red;
        }
    }


  protected void gwDataList_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        GridViewRow row = null;

        if (e.CommandName == "HiddenPostButtonCommand")
        {
            Control cmdControl = e.CommandSource as Control;
            row = cmdControl.NamingContainer as GridViewRow;
            gwChatList.EditIndex = -1;
            getDetail(row.Cells[0].Text, row.Cells[2].Text);

            //測定情報の測定ID
            tID.Text = row.Cells[0].Text;

            //測定情報の測定種別
            tCV.Text = row.Cells[2].Text;
            tRowID.Text = e.CommandArgument.ToString();
            gwDataList.Rows[int.Parse(tRowID.Text)].BackColor = System.Drawing.Color.Orange;
        }
asp

 <asp:GridView ID="gwDataList" runat="server" AutoGenerateColumns="False" 
            Width="1060px" BorderColor="#999999" BorderStyle="None" BorderWidth="1px" CellPadding="3"
            GridLines="Vertical" OnRowDataBound="gwDataList_RowDataBound" OnRowCommand="gwDataList_RowCommand">
            <AlternatingRowStyle  />
            <Columns>
                <asp:BoundField DataField="measurement_id" HeaderText="測定ID" >
                    <ItemStyle Width="60px"></ItemStyle>
                </asp:BoundField>
                <asp:BoundField HeaderText="測定日時" DataField="measurement_time" ItemStyle-Width="150px"
                    NullDisplayText="-">
                    <ItemStyle Width="150px"></ItemStyle>
                </asp:BoundField>
                <asp:BoundField HeaderText="測定種別" DataField="inspection_type" ItemStyle-Width="100px"
                    NullDisplayText="-">
                    <ItemStyle Width="80px"></ItemStyle>
                </asp:BoundField>
                <asp:BoundField HeaderText="神経種別" DataField="nerve_name" ItemStyle-Width="90px" NullDisplayText="-">