单击第1个gridview中的选择按钮后，第2个gridview不可见

Question

我有2个网格视图。第一个gridview存储一个月内员工的总工作天数，第二个gridview存储员工每天工作的总小时数。我在第一个gridview中有选择按钮。单击该选择按钮时，该特定行的详细信息应显示在第二个gridview中。但单击选择按钮后，第二个网格视图不可见。我怎样才能做到这一点。代码如下。

        protected void gvWorkedDays_SelectedIndexChanged(object sender, EventArgs e)
        {
        string someVaribaleName = gvWorkedDays.SelectedRow.Cells[1].Text;
        TextBox tb = new TextBox();
        tb.Text = someVaribaleName;            
        dTabPrt = dTable2;
        dTable2 = getConn.GetAdapterDatatable("SELECT tsNo, tsDate, tsOnSite, tsUser, (Select cmName from customermaster where cmCode=tsCustomer), tsCategory, tsDescription, tsFromTime, tsToTime, tsHours, tsExp, (select tmName from taskmaster where tmCode=tsTask), tsStatus, (Select pmName from project where pmCode=tsProject) from timesheet where tsUser='" + tb.Text + "' and tsDate >=  '" + cFDate + "' AND tsdate <=  '" + cTDate + "' GROUP BY tsDate", Global.conStrDatabase);
        gvDetails.DataSource = dTable2;
        gvDetails.DataBind();
        gvDetails.AutoGenerateColumns = true; 
       }     

我已将第一个gridview的AutoGenerateSelectButton属性设置为true