async void RefreshGrid()
{
var datas = await tablehelper.GetCCTVData();
GvData.DataSource = datas;
GvData.DataBind();
if (GvData.Rows.Count > 0)
{
//This replaces <td> with <th>
GvData.UseAccessibleHeader = true;
//This will add the <thead> and <tbody> elements
GvData.HeaderRow.TableSection = TableRowSection.TableHeader;
//This adds the <tfoot> element. Remove if you don't have a footer row
GvData.FooterRow.TableSection = TableRowSection.TableFooter;
}
}