下载Word文档的四种方法

http://www.cnblogs.com/zjyuan/archive/2011/02/14/1954009.html

//第一种方法:
Response.ClearContent();
Response.ClearHeaders();
Response.ContentType = "Application/msword";
string s = Server.MapPath("文件名.doc");
Response.WriteFile("文件名.doc");
Response.Write(s);
Response.Flush();
Response.Close();

//第二种方法:
Response.ClearContent();
Response.ClearHeaders();
Response.ContentType = "Application/msword";
string strFilePath = "";
strFilePath = Server.MapPath("文件名.doc");
FileStream fs = new FileStream(strFilePath, FileMode.OpenOrCreate, FileAccess.Read);
Response.WriteFile(strFilePath, 0, fs.Length);
fs.Close();

//第三种方法:
string path = Server.MapPath("文件名.doc");
FileInfo file = new FileInfo(path);
FileStream myfileStream = new FileStream(path, FileMode.Open, FileAccess.Read);
byte[] filedata = new Byte[file.Length];
myfileStream.Read(filedata, 0, (int)(file.Length));
myfileStream.Close();
Response.Clear();
Response.ContentType = "application/msword";
Response.AddHeader("Content- Disposition", "attachment;filename=文件名.doc");
Response.Flush();
Response.BinaryWrite(filedata);
Response.End();

//第四种方法:
解决下载doc文件时自动在页面打开的问题：

context.Response.ContentType = "application/x-octet-stream";
string filePath = context.Server.MapPath(context.Request.QueryString["fileName"].ToString());
string fileName = HttpUtility.UrlEncode(System.IO.Path.GetFileName(filePath).ToString(), System.Text.Encoding.UTF8);
context.Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
context.Response.WriteFile(filePath);
context.Response.Flush();

调用：

<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='<%#string.Format("X.ashx?fileName={0}",getFilePath(Eval("fileUrl").ToString()))%>'> <%#Eval("fileName")%></asp:HyperLink>