C# 如何将图像从PhoneGap上传到Asp.NETWebAPI?

C# 如何将图像从PhoneGap上传到Asp.NETWebAPI?,c#,cordova,mime-types,file-transfer,C#,Cordova,Mime Types,File Transfer,我有以下可用的API: [HttpPost] [CorsEnabled] [ActionName("upstream")] public DTO.Callback UploadPhoto(Stream data) { var m = new Logic.Components.User(); return m.UploadPhoto(data, Common.UserValues().Email); } [HttpPost] [CorsEnabled] [ActionName("

我有以下可用的API:

[HttpPost]
[CorsEnabled]
[ActionName("upstream")]
public DTO.Callback UploadPhoto(Stream data)
{
    var m = new Logic.Components.User();
    return m.UploadPhoto(data, Common.UserValues().Email);
}

[HttpPost]
[CorsEnabled]
[ActionName("upbyte")]
public DTO.Callback UploadPhoto(byte[] data)
{
    var m = new Logic.Components.User();
    return m.UploadPhoto(data, Common.UserValues().Email);
}

[HttpPost]
[CorsEnabled]
[ActionName("upfile")]
public DTO.Callback UploadPhoto(HttpPostedFileBase data)
{
    var m = new Logic.Components.User();
    return m.UploadPhoto(data, Common.UserValues().Email);
}

[HttpPost]
[CorsEnabled]
[ActionName("up")]
public DTO.Callback UploadPhoto(DTO.UserPhoto data)
{
    var m = new Logic.Components.User();
    return m.UploadPhoto(data, Common.UserValues().Email);
}
UserPhoto
class

public class UserPhoto
{
    public string Base64 { get; set; }
    public byte[] Data { get; set; }
}
在后面的代码中,我尝试转换或获取每个请求数据的等效字节[]。
如果我能得到正确的图像字节,那么我就可以开始了

在我的PhoneGap应用程序中,我有以下代码:

打开相机的功能:

takePicture: function (success, error) {
    var s = function (data) {
            navigator.camera.cleanup();
            (success || angular.noop)(data);
        },
        e = function (data) {
            navigator.camera.cleanup();
            (error || angular.noop)(data);
        };

    navigator.camera.getPicture(s, e,
        {
            quality: 100,
            destinationType: Camera.DestinationType.FILE_URI,
            sourceType: Camera.PictureSourceType.CAMERA,
            encodingType: Camera.EncodingType.PNG,
            correctOrientation: true
        }
    );
}
我的第一次尝试是将图像转换为base64字符串并使用“up”API。
对于低
质量
不高于
50
的情况,它可以正常工作。但这幅图像几乎无法辨认。因此,我将
质量设置为
100
。然后新的问题来了,电话挂断了

因此,我尝试使用
文件传输
。代码如下:

fileTransfer: function (filePath, serverUri, mimeType, params, success, error) {
    var
        u = $coreData.user.getSession()
        ;

    var options = new FileUploadOptions();
    options.fileKey = 'file';
    options.mimeType = mimeType;
    options.params = params;
    options.chunkedMode = true;
    options.headers = {
        Connection: 'close',
        Device: m.createDeviceHeader(),
        'Authentication-Token': (u && u.SessionKey),
        'Content-Type': 'application/json'
    };

    var ft = new FileTransfer();
    ft.upload(filePath, encodeURI(serverUri), success, error, options);
}
示例用法:

uploadFile: function (path) {
    var def = $q.defer();
    $coreUtility
        .fileTransfer(path, $coreAPI.user.getUrl('upfile'), 'image/png', null,
        function (success) {


            def.resolve(m.callback(true, UPLOAD_PHOTO_SUCCESS, success));
        },
        function (error) {


            def.reject(m.callback(false, UPLOAD_PHOTO_FAIL, error));
        });
    return def.promise;
}  

但我无法上传文件,我总是得到不受支持的媒体类型格式化程序,有时出现空引用异常。我完全不知道。

好吧,我现在明白了。对于其他在同一问题上苦苦挣扎的人来说,以下是解决方案

    [HttpPost]
    [CorsEnabled]
    [ActionName("upfile")]
    public DTO.Callback UploadPhoto()
    {
        var m = new Logic.Components.User();
        return m.UploadPhoto(HttpContext.Current.Request, Common.UserValues().Email);
    }
一些逻辑:

    public DTO.Callback UploadPhoto(HttpRequest req, string email)
    {
        if (req.Files.Count > 0)
        {
            var file = req.Files[0];
            var m = new Logic.Components.User();
            return m.UploadPhoto(file.InputStream, email);
        }

        return new DTO.Callback { Message = "Fail to upload. Make sure that you are uploading an image file." };
    }  
有关解决方案的一些说明:

第一部分是API,第二部分是后端代码

要将图像流从
PhoneGap
传递到您的
ASP.Net MVC Web API
,您只需使用
HttpContext.Current.Request
从PhoneGap获取