问使用AngularJS -> .NET Web 2 -> ->服务器上传文件

EN

$scope.uploadFile = function() {
    //get the filename from the <input type='file'>
    //angular doesn't allow attaching ngModel to file input
    var fileInput = document.getElementById("myInputId");

    //check if there's a file
    if(fileInput.files.length === 0) return;

    //you cannot send a file as JSON because json is in the string format
    //for fileuploads, you must send as a FormData() object
    //C# accepts HttpPostedFileBase as the file argument
    var file = fileInput.files[0];

    //put the file in a new formdata object
    var payload = new FormData();
    payload.append("file", file);

    //upload file to C# controller
    $http.post("path/to/C#/controller", payload, {
            //you **need** to specify these options, without them upload does not work
            transformRequest: angular.identity,
            headers: { "Content-Type": undefined }
    }).then(function(data) {
        //success
    }, function(error) {
        //error
    });
}

[WebMethod]
public string UploadFile(HttpPostedFileBase file) {
    //access the file object here
    var inputStream = file.InputStream;
    var fileName = Path.GetFileName(file.FileName);

    try
    {
        file.SaveAs("local/path" + fileName);
    }
    catch (IOException exc)
    {
        return "Error: " + exc.Message;
    }

    return "success";
}