将图像从图像控件存储到 StorageFile

Store image in to StorageFile from image control(将图像从图像控件存储到 StorageFile)

问题描述

如何将图像从 Windows 商店应用程序中的图像控件存储到 StorageFile?我正在使用以下链接，但这对我没有用

how can i store image in to StorageFile from image control in windows store apps? I'm using following link but that is not useful for me

StorageFile file = await StorageFile.CreateStreamedFileFromUriAsync(" ", new Uri(user.ProfilePicUrl), new RandomAccessStream());

http://msdn.microsoft.com/en-us/library/windows/apps/windows.storage.storagefile.createstreamedfileasync.aspx

我的问题需要明确的解决方案.我该怎么做?

I need clear solution for my problem. How can I do this?

推荐答案

您可以使用以下方法将图片从 url 保存到 LocalFolder 中的文件:

You can use the following method to save an image from an url to a file in LocalFolder:

public async Task<string> DownloadFileAsync(Uri uri, string filename)
{
    using (var fileStream = await ApplicationData.Current.LocalFolder.OpenStreamForWriteAsync(filename, CreationCollisionOption.ReplaceExisting))
    {
        var webStream = await new HttpClient().GetStreamAsync(uri);
        await webStream.CopyToAsync(fileStream);
        webStream.Dispose();
    }
    return (await ApplicationData.Current.LocalFolder.GetFileAsync(filename)).Path;
}

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