asp.net - 下載特定文件夾中的文件

Question

我正在嘗試下載位於特定文件夾中的文件。我使用此代碼，但它給了我一個錯誤Reponse.End(); - >無法因爲代碼優化或本地幀是在調用堆棧

if (m.Path.EndsWith(".txt")) 
      { 
       Response.ContentType = "application/txt"; 
      } 
      else if (m.Path.EndsWith(".pdf")) 
      { 
       Response.ContentType = "application/pdf"; 
      } 
      else if (m.Path.EndsWith(".docx")) 
      { 
       Response.ContentType = "application/docx"; 
      } 
      else 
      { 
       Response.ContentType = "image/jpg"; 
      } 
      string nameFile = m.Path; 

      Response.AppendHeader("Content-Disposition", "attachment;filename=" + nameFile); 

      Response.TransmitFile(Server.MapPath(ConfigurationManager.AppSettings["IMAGESPATH"]) + nameFile); 
      Response.End(); 

我也試過Response.Write的頂部，以評估表達，但它給了我同樣的錯誤。

Answer 1

Response.End將拋出ThreadAbortException和它的存在只爲compatibility with old ASP，你應該使用HttpApplication.CompleteRequest

這裏是例子：

public class Handler1 : IHttpHandler 
{  
    public void ProcessRequest(HttpContext context) 
    { 
    context.Response.AppendHeader("Content-Disposition", "attachment;filename=pic.jpg"); 
    context.Response.ContentType = "image/jpg"; 
    context.Response.TransmitFile(context.Server.MapPath("/App_Data/pic.jpg")); 
    context.ApplicationInstance.CompleteRequest(); 
    } 

    public bool IsReusable 
    { 
    get 
    { 
     return false; 
    } 
    } 
}