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);
      }
    }
  }