18-05-17, 04:09 PM
كود :
Imports System.Xml
Public Class Form1
Dim WithEvents BackgroundWorker1 As New System.ComponentModel.BackgroundWorker
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Button1.Enabled = False
Button2.Enabled = True
If Not Me.BackgroundWorker1.IsBusy Then Me.BackgroundWorker1.RunWorkerAsync()
End Sub
Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
If Me.BackgroundWorker1.IsBusy Then Me.BackgroundWorker1.CancelAsync()
Button1.Enabled = True
Button2.Enabled = False
End Sub
Private Sub BackgroundWorker1_DoWork(sender As System.Object, e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
BackgroundWorker1.WorkerSupportsCancellation = True
Control.CheckForIllegalCrossThreadCalls = False
Dim url As String = String.Format("https://www.hamqth.com/xml.php?id={0}&callsign={1} &prg=BKLOG", Label17.Text, calls.Text)
Dim document As New XmlTextReader(url)
'loop through the xml file
While (document.Read())
If Me.BackgroundWorker1.CancellationPending Then Exit Sub
Dim type = document.NodeType
'if node type was element
If (type = XmlNodeType.Element) Then
'if the loop found a <FirstName> tag
If (document.Name = "adr_name") Then
Lfullname.Text = document.ReadInnerXml
End If
If (document.Name = "us_state") Then
state.Text = document.ReadInnerXml
End If
'if the loop found a <FirstName> tag
If (document.Name = "qth") Then
qth.Text = document.ReadInnerXml
End If
'if the loop found a <FirstName> tag
If (document.Name = "grid") Then
WORKinfo.GRIDSQUARE.Text = document.ReadInnerXml
End If
'if the loop found a <FirstName> tag
If (document.Name = "qsl_via") Then
WORKinfo.Lqslmgr.Text = document.ReadInnerXml
End If
'if the loop found a <FirstName> tag
If (document.Name = "latitude") Then
WORKinfo.LAT.Text = document.ReadInnerXml
End If
'if the loop found a <FirstName> tag
If (document.Name = "longitude") Then
WORKinfo.LON.Text = document.ReadInnerXml
End If
End If
End While
End Sub
End Class