C#中使用Response下載

正常流程

正常的從服務器端下載文件的流程

System.IO.FileInfo file = new System.IO.FileInfo(s_path);
HttpContext.Current.Response.ContentType = "application/ms-download";
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.AddHeader("Content-Type", "application/octet-stream");
HttpContext.Current.Response.Charset = "utf-8";
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(file.Name, System.Text.Encoding.UTF8));
HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());
HttpContext.Current.Response.WriteFile(file.FullName);
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.End();

調試

對於最后一句代碼HttpContext.Current.Response.End();

此語句執行后 后面的代碼就不會被執行。

查看Log日志中記錄的Exception的信息，顯示HttpContext.Current.Response.End()這條語句正在停止進程，也就是不會再執行后面的代碼。

總結

如果在調用該方法后還有要執行的代碼，就注釋掉最后一句代碼。

即為：

System.IO.FileInfo file = new System.IO.FileInfo(s_path);
HttpContext.Current.Response.ContentType = "application/ms-download";
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.AddHeader("Content-Type", "application/octet-stream");
HttpContext.Current.Response.Charset = "utf-8";
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(file.Name, System.Text.Encoding.UTF8));
HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());
HttpContext.Current.Response.WriteFile(file.FullName);
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.Clear();
//注釋該行代碼
//HttpContext.Current.Response.End();