c#导出文件，文件名中文乱码解决方法。

 public string clFielName(string fileName)
     {
         System.Web.HttpContext curContext = System.Web.HttpContext.Current;
         string outputFileName = null;
         string browser = curContext.Request.UserAgent.ToUpper();
         if (browser.Contains("MS") == true && browser.Contains("IE") == true)
         {
             outputFileName = System.Web.HttpUtility.UrlEncode(fileName);
         }
         else if (browser.Contains("FIREFOX") == true)
         {
             outputFileName = "\"" + fileName + "\"";
         }
         else
         {
             outputFileName = System.Web.HttpUtility.UrlEncode(fileName);
         }
         return outputFileName;
     }