Question

我目前正在使用Windows手机应用程序点击图片，我想使用HTTP post请求将该图像上传到Web服务。我不想使用windows phone silverlight。

如何将该图片发送到网络服务网址？

Answer 1

在http上发布图片就像发布任何其他文件类型一样。使用以下代码段

public string PostFileUsingApi()
{
    string result = "";
    string param1 = "value1";

    using (var handler = new HttpClientHandler()) {
        using (var client = new HttpClient(handler) { BaseAddress = new Uri("http://localhost:8008") }) {
            client.Timeout = new TimeSpan(0, 20, 0);

            StorageFile storageFile = await Windows.Storage.StorageFile.GetFileFromApplicationUriAsync(uri);
            Stream stream = await storageFile.OpenStreamForReadAsync();

            var requestContent = new MultipartFormDataContent();
            StreamContent fileContent = new StreamContent(stream);
            fileContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data") {
                Name = "imagekey", //content key goes here
                FileName = "myimage"
            };

            fileContent.Headers.ContentType = MediaTypeHeaderValue.Parse("image/bmp");

            requestContent.Add(fileContent);

            client.DefaultRequestHeaders.Add("ClientSecretKey", "ClientSecretValue");

            HttpResponseMessage response = await client.PostAsync("api/controller/UploadData?param1=" + HttpUtility.UrlEncode(param1), requestContent).Result;

            if (response.StatusCode == System.Net.HttpStatusCode.OK) {
                result = await response.Content.ReadAsStringAsync().Result
            } else {
                result = "";
            }
        }
    }

    return result;
}

安装此软件包以解决依赖关系 https://www.nuget.org/packages/microsoft.aspnet.webapi.client/

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