c# - 使用 jQuery 的 ajax 将文件发送到 C# 中的 Web 服务 (asmx)

Question

我通过这种方法使用网络服务:

        $.ajax({
            type: 'POST',
            url: 'page.asmx/method',
            contentType: 'application/json; charset=utf-8',
            dataType: 'json',
            data: '{}'
        });

发送 json 字符串，它有效，但如果我尝试用 FormData 附加输入内容并将其传递到数据值中，我会得到 500 响应。我该怎么办？

Answer 1

你需要序列化你的数据....

  var data = new FormData();

  var files = $("#YOURUPLOADCTRLID").get(0).files;

  // Add the uploaded image content to the form data collection
  if (files.length > 0) {
       data.append("UploadedFile", files[0]);
  }

  // Make Ajax request with the contentType = false, and procesDate = false
  var ajaxRequest = $.ajax({
       type: "POST",
       url: "/api/fileupload/uploadfile",
       contentType: false,
       processData: false,
       data: data
       });

在 Controller 内部你可以有类似的东西

if (HttpContext.Current.Request.Files.AllKeys.Any())
{
   // Get the uploaded image from the Files collection
   var httpPostedFile = HttpContext.Current.Request.Files["UploadedFile"];

   if (httpPostedFile != null)
   {
   // Validate the uploaded image(optional)

   // Get the complete file path
       var fileSavePath = Path.Combine(HttpContext.Current.Server.MapPath("~/UploadedFiles"), httpPostedFile.FileName);

    // Save the uploaded file to "UploadedFiles" folder
    httpPostedFile.SaveAs(fileSavePath);
}
 }

希望对你有帮助