我正在开发一个网络应用程序,需要流式传输各种文件.我可以做PDF,图像和较旧的Office文档.但是,当我尝试与2007年的文件,它打破了.这是我的代码：
Response.Buffer = true;
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
switch (FileExtension.ToLower())
{
case "pdf":
Response.ContentType = "application/pdf";
break;
case "doc":
Response.ContentType = "application/msword";
break;
case "docx":
Response.ContentType = "application/vnd.ms-word.document.12";
break;
case "xls":
Response.ContentType = "application/vnd.ms-excel";
break;
case "xlsx":
Response.ContentType = "application/vnd.ms-excel.12";
break;
default:
Response.ContentType = "image/jpeg";
break;
}
Response.BinaryWrite(buffer);
我得到的错误是：
An invalid character was found in text content. Error processing resource 'http://DomainName/GetFile.aspx... PK
有什么建议么？
解决方法
根据简短的网页搜索,word和excel的正确的MIME类型是：
application/vnd.openxmlformats-officedocument.wordprocessingml.document application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
http://www.bram.us/2007/05/25/office-2007-mime-types-for-iis/
编辑：
以下简化示例适用于我.它与你的不同之处在于它使用通用处理程序而不是Web表单(这更适合于这样的东西).
要测试它,请确保应用程序的顶级文件夹中有一个名为Book1.xlsx的excel 2007文件.
DownloadSpreadsheet.ashx:
<%@ WebHandler Language="C#" Class="DownloadSpreadsheetHandler" %>
using System;
using System.Web;
using System.IO;
public class DownloadSpreadsheetHandler: IHttpHandler {
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
string path = context.Server.MapPath("~/Book1.xlsx");
using (FileStream spreadsheet = File.OpenRead(path))
{
CopyStream(spreadsheet,context.Response.OutputStream);
}
}
public bool IsReusable {
get {
return false;
}
}
private static void CopyStream(Stream input,Stream output)
{
byte[] buffer = new byte[32768];
while (true)
{
int read = input.Read(buffer,buffer.Length);
if (read <= 0)
return;
output.Write(buffer,read);
}
}
}
