验证文本不能为空 不用控件
public partial class NewsEditor : System.Web.UI.Page
  {
  protected void Page_Load(object sender, EventArgs e)
  {
  if (!IsPostBack)
  {
  if (Request["id"] != "0")
  {
  title.Text = News_BLL.TextListSingle(int.Parse(Request["id"]))[0].title;
  editor.Text = News_BLL.TextListSingle(int.Parse(Request["id"]))[0].content;
  }
  }
  }
  protected void submit_Click(object sender, EventArgs e)
  {
  bool status;

  editor.Text = News_BLL.EditorBug(editor.Text);
   
  if (Request["id"] != "0")
  {
  status = News_BLL.TextListUpdate(title.Text, editor.Text, int.Parse(Request["id"]));
  }
  else
  {
  status = News_BLL.TextListInsert(1001, title.Text, editor.Text);这里 }
  if (status) { Server.Transfer("News.aspx?id=" + Request["uid"]); }
  }
  }

------解决方案--------------------
else
{
if(string.isNullOrEmpty(title.Text))
{
return;
}
status = News_BLL.TextListInsert(1001, title.Text, editor.Text);这里 }
if (status) { Server.Transfer("News.aspx?id=" + Request["uid"]); }
}
 
------解决方案--------------------
if (Request["id"] != "0")
{
status = News_BLL.TextListUpdate(title.Text, editor.Text, int.Parse(Request["id"]));
}
else
{
if(title.Text.Trim().Length>0)
//正常执行
else
{
ClientScript.RegisterStartupScript(this.GetType(), "abc", "<script>alert('不能为空！')</script>");
return;
}
}