我正在开发一个ASP.net（C＃）网站，该网站有一个用户输入信息的表单，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。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，哪种方法可以覆盖两个版本，将图像保存到文件系统或将图像直接保存到数据库？
答案 0 :(得分：1)
传统的MultipartFormData POST可以使用WinRT实现。
下面的代码是基于Portable Class Library (PCL)实现的， /// <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>();
}
是WinRT和.NET的一种子集，但它将是99％相同。
var uploadedFileUrl = await UploadedFile(fileNameOrUrl, stream);而且，您现在可以将其用作{{1}}