GRIDVIWE空数据时显示表头信息和添加无数据提醒

private void ShowNullTable(GridView grd)
{
if (grd.Rows.Count > 0) return; //有数据，不要处理
if (grd.DataSource != null)
{
if (((DataTable)grd.DataSource).Rows.Count > 0)
{
return;
}
}
GridViewRow row = new GridViewRow(-1, -1, DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
foreach (DataControlField field in grd.Columns)
{
TableCell cell = new TableCell();
cell.Text = field.HeaderText;
cell.Width = field.HeaderStyle.Width;
cell.Height = field.HeaderStyle.Height;
cell.ForeColor = field.HeaderStyle.ForeColor;
cell.Font.Size = field.HeaderStyle.Font.Size;
cell.Font.Bold = field.HeaderStyle.Font.Bold;
cell.Font.Name = field.HeaderStyle.Font.Name;
cell.Font.Strikeout = field.HeaderStyle.Font.Strikeout;
cell.Font.Underline = field.HeaderStyle.Font.Underline;
cell.BackColor = field.HeaderStyle.BackColor;
cell.VerticalAlign = field.HeaderStyle.VerticalAlign;
cell.HorizontalAlign = field.HeaderStyle.HorizontalAlign;
cell.CssClass = field.HeaderStyle.CssClass;
cell.BorderColor = field.HeaderStyle.BorderColor;
cell.BorderStyle = field.HeaderStyle.BorderStyle;
cell.BorderWidth = field.HeaderStyle.BorderWidth;
row.Cells.Add(cell);
}

TableItemStyle headStyle = grd.HeaderStyle;
TableItemStyle emptyStyle = grd.EmptyDataRowStyle;
emptyStyle.Width = headStyle.Width;
emptyStyle.Height = headStyle.Height;
emptyStyle.ForeColor = headStyle.ForeColor;
emptyStyle.Font.Size = headStyle.Font.Size;
emptyStyle.Font.Bold = headStyle.Font.Bold;
emptyStyle.Font.Name = headStyle.Font.Name;
emptyStyle.Font.Strikeout = headStyle.Font.Strikeout;
emptyStyle.Font.Underline = headStyle.Font.Underline;
emptyStyle.BackColor = headStyle.BackColor;
emptyStyle.VerticalAlign = headStyle.VerticalAlign;
emptyStyle.HorizontalAlign = headStyle.HorizontalAlign;
emptyStyle.CssClass = headStyle.CssClass;
emptyStyle.BorderColor = headStyle.BorderColor;
emptyStyle.BorderStyle = headStyle.BorderStyle;
emptyStyle.BorderWidth = headStyle.BorderWidth;
if (grd.Controls.Count == 0)
{
grd.Page.Response.Write("<script language='javascript'>alert('必须在初始化表格类之前执行DataBind方法并设置EmptyDataText属性不为空!');</script>");
}
else
{
grd.Controls[0].Controls.Clear(); //删除没数据时的提示
grd.Controls[0].Controls.AddAt(0, row);
GridViewRow newRow = new GridViewRow(0, 0, DataControlRowType.DataRow, DataControlRowState.Normal);
newRow.Cells.Add(new TableCell());
newRow.Cells[0].ColumnSpan = Columns.Count;
newRow.Cells[0].HorizontalAlign = HorizontalAlign.Center;
newRow.Cells[0].Text = EmptyDataText;
grd.Controls[0].Controls.Add(newRow);
}

}