Javascript 从AngularJS向WCF发送文件

我在尝试将文件从AngularJS发送到WCF web服务时遇到了一个问题，我收到了很多其他调用，但这一个不会。我在

UploadTest

中得到的是一个空字符串，如果我没有将其转换为blob，而是按原样发送它并尝试接收一个

字节[]

或

列表，我得到的是空字符串。我做错了什么

[编辑]
“stream”对象在JS端确实有一个大小

[编辑二]
如果我转换成字符串而不是Blob，我可以发送短字符串，但不能发送大字符串（大小超过10000）

Javascript

function selectFile() {
        var f = document.getElementById('file').files[0];
        var r = new FileReader();
        vm.fileName=f.name
        r.onload = function (e) {


            var dataab = r.result;
            var data = new Uint8Array(dataab);
            var saveObject = { User: $rootScope.globals.currentUser.id, Name: vm.fileName, Data: data, Fileformat: "CSV", Separator: ";" };
            FlowService.UploadTest(data)
            .then(function (result) {
                vm.uploaded = result.Success;
                if (result.Success) {
                    vm.allFiles.push({ Name: result.FileName, Id: result.Id });
                }
            });
        }

        // Read file as binary string
        //r.readAsBinaryString(f);
        // Read as arrya buffer shall be used when sending binary data. Problem is that we got zero length on wcf with both array and list

        r.readAsArrayBuffer(f);
    }


function UploadTest(str) {

        var url = "../../Service1.svc/UploadTest";
        var stream = new Blob(str);
        return $http({
            method: 'POST',
            url: url,
            data: { stream: stream }
        }).then(handleSuccess, handleError('Error uploading file'));
    }

周转基金

您是否尝试发送HttpPostedFile？这可能更容易处理。您是否尝试发送HttpPostedFile？这可能更容易处理。
[OperationContract]
[WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.WrappedRequest)]
UploadResult UploadTest(String stream);


public UploadResult UploadTest(String stream)
{
 return new UploadResult { Message = stream, FileName = "Test", Id = -1, Success = true };
}