input file 獲取不到Request.Files 解決辦法

  <input type="file" name="xxxxxxx"/>必須有“name”屬性，否則在后台代碼中用Request.Files是取不到值的

后台讀取文件代碼：

　　　　　HttpFileCollection httpFileCollection = HttpContext.Current.Request.Files;
                if (httpFileCollection.Count > 0)
                {
                    HttpPostedFile file = httpFileCollection[0];
                   
                     StreamReader reader = new StreamReader(file.InputStream);
                     StringBuilder strLicense = new StringBuilder();
                     do
                     {
                         strLicense.AppendLine(reader.ReadLine());
                     } while (!reader.EndOfStream);

                     return strLicense.ToString();
                   
                }