怎样在ASP.NET中实现文件下载的功能?(C#)

Question

http://expert.csdn.net/Expert/topic/1397/1397527.xml?temp=2.672976E-02

Answer 1

this.Response.ClearHeaders();
this.Response.Clear();
this.Response.Buffer=false;
System.Data.OleDb.OleDbConnection odc=new OleDbConnection();
odc.ConnectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+this.Server.MapPath("MyDB\\") +
System.Configuration.ConfigurationSettings.AppSettings["connstr"];
OleDbDataReader dr;
OleDbCommand odcd=new OleDbCommand("Select * From [Code] Where CodeID="+this.Request.QueryString["id"],odc);
odc.Open();
dr=odcd.ExecuteReader();


if(!dr.Read())
this.Response.Redirect(""); string filename=dr["filename"].ToString();
byte[] by;
by=(byte[])dr["file2"];// this.Response.Write(filename);
odc.Close();



this.Response.AddHeader("Content-Disposition","attachment;filename="+System.Web.HttpUtility.UrlEncode(filename));
this.Response.AddHeader("Content-Length",by.Length.ToString());
this.Response.ContentType="application/octet-stream";
this.Response.BinaryWrite(by);
this.Response.End();