如何将DataView转换为DataSource

Question

有没有办法将DataView转换为DataSource？

我尝试点击我的gridview列。这是代码：

internal static string sort(object _sender, GridViewSortEventArgs _e, string _viewStateSortExpression, string _viewStateSortDirection)
        {
            string expression = _e.SortExpression;
            string direction = getSortDirection(expression, _viewStateSortExpression, _viewStateSortDirection); //ascending by default

            GridView gvSrc = (GridView)_sender;

            DataView dv = new DataView();
            gvSrc.DataSource = dv;
            gvSrc.DataBind();



            dv = (DataView)((SqlDataSource)gvSrc.DataSource).Select(DataSourceSelectArguments.Empty);


            dv.Sort = expression + " " + direction;
            return direction;
        }

单击列进行排序时出现此错误：

Unable to cast object of type 'System.Data.DataView' to type 'System.Web.UI.WebControls.SqlDataSource'.

Answer 1

将DataView转换为DataTable ：

有一个名为ToTable的方法将DataView转换为DataTable

DataTable dt=dv.ToTable();// this method may expects parameters

将DataTable转换为DataView ：

DefaultView是一个返回DataTable的DataView的属性

DataView dv=dt.DefaultView

Answer 2

试试这个，

 DataTable m_DataTable = gvSrc.DataSource as DataTable;

   if (m_DataTable != null)
   {
      DataView m_DataView = new DataView(m_DataTable);
      m_DataView.Sort = e.SortExpression + " " + ConvertSortDirectionToSql(e.SortDirection);

      gvSrc.DataSource = m_DataView;
      gvSrc.DataBind();
   }