如何检查URL是否存在于wp7应用程序上？

Question

I want to load a image for my apps. I know the exact URL that I need to acquire the image. How to check URL exists or not ?

Answer 1

You use something like this.

bool result = false;
    using (WebClient client = new WebClient())
    {
        try
        {
            Stream stream = client.OpenRead(url);
            if (stream != null)
            {
                result = true;
            }
            else
            {
                result = false;
            }
        }
        catch
        {
            //Any exception will returns false.
            result = false;
        }
    }
    return result;

As you are using WP7, you may need to look the async versions.

Source : http://www.dotnetthoughts.net/how-to-check-remote-file-exists-using-c/