public void IsAddressible(Uri uri, IsAddressibleCallback callback, object userToken)
{
using (var client = new MyClient())
{
client.HeadOnly = true;
client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(IsAddressibleHeadString);
client.DownloadStringAsync(uri, new object[] { callback, userToken });
}
}
public void IsAddressible(Uri uri, IsAddressibleCallback callback, object userToken)
{
using (var client = new MyClient())
{
client.HeadOnly = true;
client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(IsAddressibleHeadString);
client.DownloadStringAsync(uri, new object[] { callback, userToken });
}
}
void IsAddressibleHeadString(object sender, DownloadStringCompletedEventArgs e)
{
IsAddressibleCallback callback = (IsAddressibleCallback)((object[])e.UserState)[0];
bool isAddressible = true;
if (e.Error != null)
{
isAddressible = false;
}
callback.Invoke(isAddressible, ((object[])e.UserState)[1]);
}
