我知道在这个主题上有很多与我类似的问题，但这些问题并不能解决我的问题。我知道 Web 服务自然地将我的对象解析为 json 作为框架的一部分。我已手动将请求标头标头 Accept 设置为 'application/json, text/javascript, / ; q=0.01'。我已将其添加<ScriptMethod(ResponseFormat:=ResponseFormat.Json)>到我的网络服务中。
很明显，我的 Web 服务正在使用文本/纯文本响应响应文件上传请求标头，并且解析我的简单 FineUploaderResponse 对象失败。请记住，对同一 Web 服务的常规 jQuery AJAX 调用可以正常工作。我不希望使用 Web API 或通用处理程序来代替我的 Web，因为多个网站都依赖于我的框架并期望这个标准。
提前致谢！
编码：
Public Class FineUploaderResponse
Property Success As Boolean
End Class
<WebMethod(EnableSession:=True)> _
<ScriptMethod(ResponseFormat:=ResponseFormat.Json)> _
Public Function UploadPhotos()
'next three lines are pointless, didn't help
'HttpContext.Current.Response.Clear()
'HttpContext.Current.Response.ContentType = "application/json"
'HttpContext.Current.Response.Charset = "utf-8"
Dim response As New FineUploaderResponse()
response.Success = True
Return response
End Function
现在当然，如果我这样做，这个网络服务就可以工作：
$(document).ready(function () {
$.ajax(
{
url: "/Services/PhotosService.asmx/UploadPhotos",
type: "POST",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (data) {
console.log(data.d);
}
});
});
标准的jQuery请求头是
POST http://localhost:3066/Services/PhotosService.asmx/UploadPhotos HTTP/1.1
Host: localhost:3066
Proxy-Connection: keep-alive
Content-Length: 0
Cache-Control: no-cache
Pragma: no-cache
Origin: http://localhost:3066
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.64 Safari/537.31
Content-Type: application/json; charset=utf-8
Accept: application/json, text/javascript, */*; q=0.01
X-Requested-With: XMLHttpRequest
Referer: http://localhost:3066/Test.aspx
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
但我正在使用 FineUploader，它正在发布 Content-Type:multipart/form-data; 请注意，尽管 jQuery AJAX 和 FineUploader 请求的 Accept 标头是相同的：
POST http://localhost:3066/Services/PhotosService.asmx/UploadPhotos HTTP/1.1
Host: localhost:3066
Proxy-Connection: keep-alive
Content-Length: 110634
Cache-Control: no-cache
Pragma: no-cache
Origin: http://localhost:3066
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.64 Safari/537.31
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary449tHPTKEpuO5jOR
Accept: application/json, text/javascript, */*; q=0.01
X-Requested-With: XMLHttpRequest
Referer: http://localhost:3066/Sellers/photos/?pid=37344
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
来自标准 Jquery ajax 调用的 Web 服务响应是：
HTTP/1.1 200 OK
Server: ASP.NET Development Server/10.0.0.0
Date: Wed, 17 Apr 2013 00:12:21 GMT
X-AspNet-Version: 4.0.30319
Cache-Control: private, max-age=0
Content-Type: application/json; charset=utf-8
Content-Length: 22
Connection: Close
来自 FineUploader 发布文件请求的 Web 服务响应是：
HTTP/1.1 500 Internal Server Error
Server: ASP.NET Development Server/10.0.0.0
Date: Wed, 17 Apr 2013 00:18:26 GMT
X-AspNet-Version: 4.0.30319
Cache-Control: private
Content-Type: text/plain; charset=utf-8
Content-Length: 1936
Connection: Close
内部服务器 500 错误错误消息详细信息是：
System.InvalidOperationException: There was an error generating the XML document. ---> System.InvalidOperationException: The type Kazork.AppCode.PhotosService+FineUploaderResponse was not expected. Use the XmlInclude or SoapInclude attribute to specify types that are not known statically.
at System.Xml.Serialization.XmlSerializationWriter.WriteTypedPrimitive(String name, String ns, Object o, Boolean xsiType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write1_Object(String n, String ns, Object o, Boolean isNullable, Boolean needType)
at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriter1.Write3_anyType(Object o)
at Microsoft.Xml.Serialization.GeneratedAssembly.ObjectSerializer1.Serialize(Object objectToSerialize, XmlSerializationWriter writer)
at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)
--- End of inner exception stack trace ---
at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id)
at System.Xml.Serialization.XmlSerializer.Serialize(TextWriter textWriter, Object o, XmlSerializerNamespaces namespaces)
at System.Web.Services.Protocols.XmlReturnWriter.Write(HttpResponse response, Stream outputStream, Object returnValue)
at System.Web.Services.Protocols.HttpServerProtocol.WriteReturns(Object[] returnValues, Stream outputStream)
at System.Web.Services.Protocols.WebServiceHandler.WriteReturns(Object[] returnValues)
at System.Web.Services.Protocols.WebServiceHandler.Invoke()
而且，如果您好奇，这是我的 FineUploader 调用：
var uploader = new qq.FineUploader({
element: document.getElementById('bootstrapped-fine-uploader'),
request: {
endpoint: "/Services/PhotosService.asmx/UploadPhotos",
forceMultipart: true,
params: { propertyId:<%=PropertyId %>},
customHeaders: { Accept: 'application/json, text/javascript, */*; q=0.01' }
},
text: {
uploadButton: '<i class="icon-upload icon-white"></i>Upload nice images.'
},
template: '<div class="qq-uploader">' +
'<pre class="qq-upload-drop-area"><span>{dragZoneText}</span></pre>' +
'<div class="qq-upload-button btn btn-success" style="width: auto;">{uploadButtonText}</div>' +
'<span class="qq-drop-processing"><span>{dropProcessingText}</span><span class="qq-drop-processing-spinner"></span></span>' +
'</div>' +
'<ul class="qq-upload-list" style="margin-top: 10px; text-align: center;"></ul>' +
'',
classes: {
success: 'alert alert-success',
fail: 'alert alert-error'
},
debug: false,
callbacks: {
// onComplete: function (id, fileName, responseJson) {
// $.when(loadThumbs()).done(function () {
// $(".qq-upload-list > .alert-success").remove();
// });
// toastr.success("Success!");
// },
onComplete: function(id, fileName, responseJSON) {
if (responseJSON.success) {
$('#file-' + id).removeClass('alert-info')
.addClass('alert-success')
.html('<i class="icon-ok"></i> ' +
'Successfully saved ' +
'“' + fileName + '”' +
'<br><img src="/images/message_ok.png" alt="' + fileName + '">');
$.when(loadThumbs()).done(function () {
$(".qq-upload-list > .alert-success").remove();
});
toastr.success("Success!");
} else {
$('#file-' + id).removeClass('alert-info')
.addClass('alert-error')
.html('<i class="icon-exclamation-sign"></i> ' +
'Error with ' +
'“' + fileName + '”: ' +
responseJSON.error);
}
},
onError: function (id, fileName, errorReason) {
toastr.error("Failed! Try again.");
}
}
});