Question

我正在尝试在C＃中开发一个适用于Windows Phone的应用程序，它基本上将用户选择的图片上传到服务器（例如localhost）。这个应用程序就像PHP文件上传脚本一样工作，用户选择一个文件，然后将其上传到服务器上的所需目录。

我已经在Picture Chooser任务的帮助下编写了选择图片的代码。但是，现在我完全糊涂了。我只是不知道如何处理选定的图片。

这是要求用户选择图片的页面代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Tasks;
using System.IO;
using System.Windows.Media.Imaging;


namespace QR_Reader
{
    public partial class SamplePage : PhoneApplicationPage
    {
        public SamplePage()
        {
            InitializeComponent();
        }

        PhotoChooserTask selectphoto = null;

        private void SampleBtn_Click(object sender, RoutedEventArgs e)
        {
            selectphoto = new PhotoChooserTask();
            selectphoto.Completed += new EventHandler<PhotoResult>(selectphoto_Completed);
            selectphoto.Show();
        }

        void selectphoto_Completed(object sender, PhotoResult e)
        {
            if (e.TaskResult == TaskResult.OK)
            {

                BinaryReader reader = new BinaryReader(e.ChosenPhoto);
                image1.Source = new BitmapImage(new Uri(e.OriginalFileName));
                txtBX.Text = e.OriginalFileName;
            }
        }

    }
}

请帮帮我。

此处，txtBX是一个显示所选图片路径的文本框。

Answer 1

您计划上传图片的服务是什么，这就是问题所在。 Here 是关于如何将其上传到Imgur的详尽指南。

通用上传可以这样：

string uploadUrl = "http://uploadserver/upload.php";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uploadUrl);
request.Method = "POST";
request.ContentType = "image/jpeg"; 
request.BeginGetRequestStream((result) =>
{
    using (Stream stream = request.EndGetRequestStream(result))
    {
        stream.Write(bytes, 0, bytes.Length); // your binary data
    }

    request.BeginGetResponse((rResult) => 
    {
        HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(rResult);

        using (Stream responseStream = response.GetResponseStream())
        {
              // Do something here.
        }
    }
}, null);

Answer 2

我是这样做的：

static private async Task<JToken> 
           ImageUploadApiCallAsync(string strApiName, List<KeyValuePair<string, string>> parameterList, Stream imageStream, string strFileName)
        {
            JToken token = null;

            if (!CheckConnection())
            {
                token = @"{
                                'success':false,
                                'message':'No connection',
                                'errorcode':1
                                }";
                return token;
            }

            try
            {
                //Get your api URL
                string strRequestUri = getApiUrlWithApiName(strApiName);

                var httpClient = new HttpClient(new HttpClientHandler());

                using (var content = new MultipartFormDataContent())
                {
                    //I did a stream compression here since I don't want the original size image to upload to my server to reduce space and internet flow.
                    Stream uploadStream = SystemUtil.CompressImageStream(imageStream);

                    content.Add(new StreamContent(uploadStream), "file", strFileName);

                    //Add my api parameters into content
                    foreach (var keyValuePair in parameterList)
                    {
                        content.Add(new StringContent(keyValuePair.Value), keyValuePair.Key);
                    }
                    //Do PostAsync
                    HttpResponseMessage response = await httpClient.PostAsync(strRequestUri, content);
                    HttpResponseMessage message = response.EnsureSuccessStatusCode();
                    //Get result from server
                    var responseString = await response.Content.ReadAsStringAsync();

                    token = JObject.Parse(responseString);
                }
            }
            catch (Exception e)
            {
                token = @"{
                                'success':false,'message':'" + e.Message + "','errorcode':2}";
            }
            return token;
        }

如何从Windows Phone上传所选照片

2 个答案: