文件作为控制器的参数而不发布

Question

我想从我的上传控件中获取一个文件，并通过ajax调用将其发送到验证器操作而不进行发布。

- 用户选择多个文件

点击'validate'，运行一些检查并返回验证结果。

- 如果验证成功，将显示“上传”按钮，并且可以将其发布。

JAVASCRIPT

function OnValidateSurveyFiles() {
    debugger;
    var SurveyId = $('#SurveyID').val();
    var file_1 = document.getElementById('surveyUploadcontrol_TextBox0_Input').files[0];
    var serializedFile = JSON.stringify(file_1, null, 2);
    var url = '/Survey/ValidateSurveyFiles';
    $.ajax({
        type: 'GET',
        url: url,
        data: { surveyFile: serializedFile },
        success: function (result) {
            //debugger;
            //
        },
        error: function (result) {
            // handle errors
            location.href = "/Home/"
        }
    });
}

CONTROLLER

public ActionResult ValidateSurveyFiles(object surveyFile)
{
    try
    {
       do something...
    }
    catch(Exception ex)
    {
        throw ex;
    }
    // I would like to return a json responde with html(partial view...) and a code with the validation's result.
    return View("_");
}

实际上，file_1如下所示：

file_1: File
lastModified: 1442499299116
lastModifiedDate: Thu Sep 17 2015 16:14:59 GMT+0200 (Mitteleuropäische Sommerzeit)
name: "File.csv"
size: 1176120
type: "application/vnd.ms-excel"
webkitRelativePath: ""
__proto__: File
constructor: File()
lastModified: (...)
get lastModified: ()
lastModifiedDate: (...)
get lastModifiedDate: ()
name: (...)
get name: ()
size: (...)
type: (...)
webkitRelativePath: (...)
get webkitRelativePath: ()
__proto__: Blob

但序列化文件只是{}

任何想法我怎么能达到预期的行为？

Answer 1

关注@ Stephen-Muecke链接。

查看

function OnValidateSurveyFiles() {
    debugger;
    var SurveyId = $('#SurveyID').val();
    var formData = new FormData();
    var fileSurvey = document.getElementById('surveyUploadcontrol_TextBox0_Input').files[0];
    formData.append("FileSurvey", fileSurvey);
    formData.append("SurveyID", SurveyId);

    var url = '/Survey/ValidateSurveyFiles';
    $.ajax({
        type: 'POST',
        url: url,
        data: formData,
        contentType: false,
        processData: false,
        success: function (result) {
            debugger;
            //
            if (result.error) {
                $('#containerErrorLog').show();
                $('#errorLogSurvey').html(result.message);
            }
            else
                $('#containerErrorLog').hide();
        },
        error: function (result) {
            // handle errors
            location.href = "/Home/"
        }
    });
}

<强>控制器

[HttpPost]
public ActionResult ValidateSurveyFiles()
{
    try
    {
        int surveyId = -1;
        Int32.TryParse(Request.Params["SurveyId"], out surveyId);

        foreach (string file in Request.Files)
        {
            HttpPostedFileBase hpf = Request.Files[file] as HttpPostedFileBase;
            BinaryReader reader = new BinaryReader(hpf.InputStream);
            byte[] binData = reader.ReadBytes(hpf.ContentLength);
            string tmpFullContent = Encoding.UTF8.GetString(binData);

            if (hpf == null || hpf.ContentLength == 0)
                continue;
            // blablabla... validation and store list of errors into "Errors"
        }

        if (Errors.count > 0)
        {
            return Json(new
            {
                error = true,
                message = RenderHelper.RenderViewToString(this.ControllerContext, "_surveyErrorLog", resultSurvey)
            });
        }
    }           
    catch (Exception ex)
    {
        throw ex;
    }
}

RenderHelper类

public static class RenderHelper
{
    public static string RenderViewToString(ControllerContext context, string viewName, object model)
    {
        if (string.IsNullOrEmpty(viewName))
            viewName = context.RouteData.GetRequiredString("action");

        ViewDataDictionary viewData = new ViewDataDictionary(model);

        using (StringWriter sw = new StringWriter())
        {
            ViewEngineResult viewResult = ViewEngines.Engines.FindPartialView(context, viewName);
            ViewContext viewContext = new ViewContext(context, viewResult.View, viewData, new TempDataDictionary(), sw);
            viewResult.View.Render(viewContext, sw);

            return sw.GetStringBuilder().ToString();
        }
    }
}