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latika singh
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31
33.6k
Win Forms UDP application
Feb 7 2012 10:10 AM
Hi All,
I am trying to establish a connection through UDP to a hardware device I want to talk to. Following is my implementation on the win forms:
I catches exception and gives the error message when I try to send the data. It says: "
Cannot send packets to an arbitrary host while connected
."
Pl advise.
Try
Dim dataSend() As Byte = New Byte() {}
myEP = New IPEndPoint(IPAddress.Parse("192.168.2.50"), 20000)
myUDP.Connect(myEP)
If myUDP.Client.Connected Then
lblStatus.Text = "Connection successful"
End If
lblStatus.Text = "Converting Data"
dataSend = Encoding.ASCII.GetBytes(txtDatatoSend.Text)
If dataSend.Length = 0 Then
lblStatus.Text = "Send textbox cannot be left blank"
Else
lblStatus.Text = ""
End If
If myUDP.Client.Connected Then
myUDP.Send(dataSend, dataSend.Length, myEP)
End If
Catch ex As System.Exception
MsgBox(ex.ToString)
End Try
Reply
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