ASP.Net 和Windows RT图像上传

本文关键字：图像 RT Windows Net ASP | 更新日期: 2023-09-27 18:26:32

我正在开发一个 ASP.net(C#(网站，该网站有一个表单，用户可以在其中输入信息，它还允许用户上传图片。我正在考虑将图像路径存储在数据库(sql server 2008 r2(上并将图像保存到文件系统中。最近我们谈到了创建WinRT版本的可能性。我不知道RT开发如何管理图像的上传，涵盖两个版本的最佳方法是什么，将图像保存到文件系统或将图像直接保存到数据库？

ASP.Net 和Windows RT图像上传

传统的MultipartFormData POST可以通过WinRT实现。下面的代码是基于 Portable Class Library (PCL) ，WinRT 和 .NET 的一种子集，但它将 99% 相同。

    /// <summary>
    /// upload file
    /// </summary>
    /// <returns></returns>
    public async Task<string> UploadedFile(string filename, StreamContent streamContent)
    {
        if ((!String.IsNullOrEmpty(filename) & (streamContent != null)) != true)
        {
            throw new ArgumentException("No filename or streamContent");
        }
        // 1. File upload
        const string uploadUrl = "image/upload.ajax";
        var content = new MultipartFormDataContent { { streamContent, "file", filename } };
        var message = new HttpRequestMessage
        {
            Method = HttpMethod.Post,
            Content = content,
            RequestUri = new Uri(uploadUrl, UriKind.Relative)
        };
        var fileUploadResult = await _httpClient.SendAsync(message);
                    // Please change below response message treatment.
                    var result = await fileUploadResult.Content.ReadAsStringAsync();
        var fileUplaodJsonResult = JObject.Parse(result);
        var uploadedFileUrl = fileUplaodJsonResult["url"].Value<string>();
        Debug.WriteLine("upload: " + fileUplaodJsonResult["success"].Value<string>());
        // 2. Post image url that you posted and other messages.
        const string confirmUrl = "image/confirm.ajax";
        var confirmValue = new List<KeyValuePair<string, string>>
                              {
                                new KeyValuePair<string, string>("url", uploadedFileUrl),
// Put other messages to post

                                new KeyValuePair<string, string>("rotate", "0"), 
                             };
        var confirmResult = await _httpClient.PostAsync(confirmUrl, new FormUrlEncodedContent(confirmValue));
               // Please change below response message treatment.
        var confirmJsonResult = JObject.Parse(await confirmResult.Content.ReadAsStringAsync());
        return confirmJsonResult["url"].Value<string>();
    }

而且，您现在可以将其用作var uploadedFileUrl = await UploadedFile(fileNameOrUrl, stream);

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