当到图片的站点的连接不是私有的时,如何加载picturebox图片?

正如@Simon Mourier和@Reza Aghaei在评论中所说,我不需要添加 CredentialCache 但是只有 Credentials . 解决方案类似于 this one .

解决方案:

WebClient wc = new WebClient();
wc.Credentials = new NetworkCredential(user, password);
MemoryStream imgStream = new MemoryStream(wc.DownloadData(mySnapUrl));//Good to go!
picturebox0.Image = new System.Drawing.Bitmap(imgStream);

编辑:

我个人必须能够异步加载上述图像,因为我以前加载图像时 picturebox0.LoadAsync(mySnapUrl) .

我从中得到了一个大主意 source .

为了能够使用需要凭据的图像,我创建了一个 async Task 要加载图像。。。

private async Task<Image> GetImageAsync(string snapUrl, string user, string password)
{
    var tcs = new TaskCompletionSource<Image>();

    Action actionGetImage = delegate ()
    {
        WebClient wc = new WebClient();
        wc.Credentials = new NetworkCredential(user, password);
        MemoryStream imgStream = new MemoryStream(wc.DownloadData(snapUrl));
        tcs.TrySetResult(new System.Drawing.Bitmap(imgStream));
    };

    await Task.Factory.StartNew(actionGetImage);

    return tcs.Task.Result;
}

... 然后使用以下命令设置图像:

var result = GetImageAsync(mySnapUrl, user, password);
result.ContinueWith(task =>
{
    picturebox0.Image = task.Result;
});