Question

我在这里有以下代码：

string imgPath = GetPathToImage(uri);
int imageHeight = 250;
int imageWidth = 200;
var bitmap = imgPath.LoadAndResizeBitmap2(imageWidth, imageHeight);
UploadBitmapAsync(bitmap);

async void UploadBitmapAsync(Bitmap bitmap)
    {
        const string UPLOAD_IMAGE = "http://" + HostAddress.Main + "/fsrservice/atxm";
        byte[] bitmapData;
        var stream = new MemoryStream();
        bitmap.Compress(Bitmap.CompressFormat.Jpeg, 0, stream);
        bitmapData = stream.ToArray();
        var fileContent = new ByteArrayContent(bitmapData);

        fileContent.Headers.ContentType = MediaTypeHeaderValue.Parse("application/octet-stream");
        fileContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data")
        {
            Name = "file",
            FileName = "my_uploaded_image.jpg"
        };

        string boundary = "---8d0f01e6b3b5dafaaadaad";
        MultipartFormDataContent multipartContent = new MultipartFormDataContent(boundary);
        multipartContent.Add(fileContent);
        HttpClientHandler clientHandler = new HttpClientHandler();
        HttpClient httpClient = new HttpClient(clientHandler);
        HttpResponseMessage response = await httpClient.PostAsync(UPLOAD_IMAGE, multipartContent);
        if (response.IsSuccessStatusCode)
        {
            string content = await response.Content.ReadAsStringAsync();
            Console.WriteLine("SUCCESS! " + content);
            bitmap.Recycle();
        }
        else
        {
            Console.WriteLine("NOT SUCCESSFUL!");
        }
    }

它不会给出任何错误（给出NOT SUCCESSFUL），但图像不会上传到服务器。我正在使用Xamarin Android，我的代码基于Upload Bitmap Image Using HTTP Multipart in Xamarin Android。 fsrservice是我用于我的应用的网络服务，这是我将文件夹atxm放在我保存文件的位置。可能是什么问题？

修改

好的，所以我仍然试图解决这个问题，然后我偶然发现了这种方法，WebClient.UploadData Method。我将此添加到我的Web服务并创建了一个.aspx，但我看不到上传的文件到该文件夹。从客户端，文件通过字节数组传递。

以下是我的代码：

Service1.svc.cs

public string FileUpload(EmployeeDetails userInfo)
    {
        Database context = new Database();
        List<byte[]> byteArray = JsonConvert.DeserializeObject<List<byte[]>>(userInfo.File);
        List<string> fileName = JsonConvert.DeserializeObject<List<string>>(userInfo.FileName);
        List<string> editedName = new List<string>();

        Attachment obj = new Attachment();

        for (int i = 1; i <= byteArray.Count; i++)
        {
            for (int j = 0; j < fileName.Count; j++)
            {
                // SOME CODE HERE
            }
        }

        context.SubmitChanges();

        for (int i = 0; i < byteArray.Count; i++)
        {
            byte[] b = byteArray[i];
            string uriString = "http://" + HostAddress.Address + "/FSRService/upload.aspx";
            WebClient myWebClient = new WebClient();
            myWebClient.UploadData(uriString, "POST", b);
        }

        string msg = null;
        return msg;          
    }

upload.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="upload.aspx.cs" Inherits="WcfService.upload" %>
<%@ Import Namespace="System"%>
<%@ Import Namespace="System.IO"%>
<%@ Import Namespace="System.Net"%>
<%@ Import NameSpace="System.Web"%>

<Script language="C#" runat=server>
void Page_Load(object sender, EventArgs e) {

    foreach(string f in Request.Files.AllKeys) {
        HttpPostedFile file = Request.Files[f];
        file.SaveAs("c:\\inetpub\\wwwroot\\FSRService\\ATXM\\" + file.FileName);
    }   
}

</Script>
<html>
<body>
<p> Upload complete.  </p>
</body>
</html>

问题：

如何编辑/添加我要上传的文件的文件名？
为什么文件没有上传到文件夹？

Answer 1

好我喜欢的是这样的。

首先，我使用一个对象作为文件：

class FileTransfer
{
    public byte[] content;
    public string name;

    public FileTransfer(string name, byte[] content)
    {
        this.name= name;
        this.content= content;
    }
}

然后我在Asp.Net上有一个web服务，看起来像是：

 [WebMethod]
 public string GetFile(string data)//the file comes serialized to Json
 {
      //Transforms the string into the object
      FileTransfer recived = new JavaScriptSerializer().Deserialize<FileTransfer>(data);
      string path = "c:\\inetpub\\wwwroot\\FSRService\\ATXM\\"+recived.name; //you could also do this in the object builder
      File.WriteAllBytes(path, recived.content);
 }

现在在Xamarin中，您可以通过右键单击项目，添加，添加Web引用直接添加.asmx webservice作为webreference，它将创建一个＆＃34;类＆＃34;使用异步函数。

你可以像这样使用它：

public void SendFile(File fileToSend)
{
      //process the file
      FileStream objfilestream = new FileStream(fileToSend.FullName, FileMode.Open, FileAccess.Read);
      int len = (int)objfilestream.Length;
      Byte[] documentcontents = new Byte[len];
      objfilestream.Read(documentcontents, 0, len);
      objfilestream.Close();
      FileTransfer newFiletoSend = new FileTransfer(file.Name, documentcontents);
      string raw = new JavaScriptSerializer().Serialize(newFiletoSend); 

      //send it
      nameOfTheWebServiceClass.nameOfTheAsmxFile service = new nameOfTheWebServiceClass.nameOfTheAsmxFile();
      service.GetFile(raw); //GetFile is the name of the funcion you want to use in the .asmx webservice.
 }

将文件上传到服务器并不起作用

1 个答案: