I'm developing a windows mobile application using VB.net, I set my map
showing in a VB "PictureBox". I use VB "WebRequest" and "WebResponse"
class to get the static map from Google. The predefined "qAddress" is
a "StringWriter" to store the address of static map.
My problem is, I can see the correct map at first time querying, but
when I change the latitude or longitude of querying and query again
within 90 seconds since last query, the "WebResponse" seems to hung up
and will return a "Response timed out" error after a long time wating.
If I update the static map longer than 90 seconds later, every thing
looks fine. Is there a limit or am I wrong at some point?
Any help many thnks!!
P.S. My web request is looks like fowllwing code:(just a part of my
program)
Dim bmp As Bitmap = New Bitmap(defaultMap)
Dim wr As WebRequest
Dim res As WebResponse
Cursor.Current = Cursors.WaitCursor
If qAddress.ToString() <> lastReq Then
Try
wr = WebRequest.Create(qAddress.ToString())
Catch ex As Exception
MessageBox.Show(ex.Message.ToString(), "Error")
Return False
End Try
lastReq = qAddress.ToString()
Try
res = wr.GetResponse()
Catch ex As Exception
MessageBox.Show(ex.Message.ToString(), "Error")
Return False
End Try
Try
bmp = New Bitmap(res.GetResponseStream)
Catch ex As Exception
MessageBox.Show(ex.Message.ToString(), "Error")
Return False
End Try
Else
Return True
End If
PictureBox1.Image = bmp.Clone()
bmp.Dispose()
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