Gridview 增加多个空行。

// 自动填充的行数
  int numCount = 0 ;
  protected void Page_Load( object sender, EventArgs e)
  {
    if ( ! Page.IsPostBack)
    {
      GridView1.DataSource = CreateDataSourceByXianhuiMeng();
      GridView1.DataBind();
    }
  }

  protected void GridView1_RowDataBound( object sender, GridViewRowEventArgs e)
  {
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
      // 计算自动填充的行数
      numCount ++ ;
    }
    if (e.Row.RowType == DataControlRowType.Footer)
    {
      // 计算完毕，在此添加缺少的行
      int toLeft = TotalRowCount - numCount;
      int numCols = GridView1.Rows[ 0 ].Cells.Count;

      for ( int i = 0 ; i < toLeft; i ++ )
      {
        GridViewRow row = new GridViewRow( - 1 , - 1 , DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
        for ( int j = 0 ; j < numCols; j ++ )
        {
          TableCell cell = new TableCell();
          cell.Text = " &nbsp; " ;
          row.Cells.Add(cell);
        }
        GridView1.Controls[ 0 ].Controls.AddAt(numCount + 1 + i, row);
      }
    }
  }