showattachment.aspx.cs

ASP.NET 2.0动态网站设计实例源代码,本书介绍了ASP.NET2.0的基础知识

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class ShowAttachment : System.Web.UI.Page
{
 protected void Page_Load(object sender, EventArgs e)
 {
  if (!IsPostBack)
  {
   if (Session["User"] == null)
   {
    NotLoginControl1.Visible = true;
    return;
   }
   object attachmentID = Request.Params["attachmentid"];
   if (attachmentID == null ||Convert.ToString(attachmentID)=="")
   {
    string Script = @"alert('请选择附件ID！');window.close();";
    Page.ClientScript.RegisterClientScriptBlock(this.GetType(),Script, this.UniqueID + "NotID", true);
    return;
   }
   AttachmentEntity att = new AttachmentEntity();
   AttachmentBussiness attBuss = new AttachmentBussiness();
   att.AttachmentID = Convert.ToInt32(attachmentID);
   if (!attBuss.GetAttachmentByID(ref att))
   {
    string Script = @"alert('该ID的附件不存在！');window.close();";
    Page.ClientScript.RegisterClientScriptBlock(this.GetType(), Script, this.UniqueID + "NotID", true);
    return;
   }
   Response.Redirect(@"~/attachment/"+att.AttachmentURL);
  }
 }
}