265 lines
11 KiB
VB.net
265 lines
11 KiB
VB.net
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Imports NationalInstruments.VisaNS
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Public Class MainForm
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Inherits System.Windows.Forms.Form
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#Region " Windows Form Designer generated code "
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Public Sub New()
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MyBase.New()
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InitializeComponent()
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End Sub
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Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
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If disposing Then
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If Not (components Is Nothing) Then
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components.Dispose()
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End If
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End If
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MyBase.Dispose(disposing)
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End Sub
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Private components As System.ComponentModel.IContainer
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Private mbSession As MessageBasedSession
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Private lastResourceString As String = Nothing
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Private WithEvents writeTextBox As System.Windows.Forms.TextBox
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Private WithEvents readTextBox As System.Windows.Forms.TextBox
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Private WithEvents queryButton As System.Windows.Forms.Button
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Private WithEvents writeButton As System.Windows.Forms.Button
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Private WithEvents readButton As System.Windows.Forms.Button
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Private WithEvents openSessionButton As System.Windows.Forms.Button
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Private WithEvents clearButton As System.Windows.Forms.Button
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Private WithEvents closeSessionButton As System.Windows.Forms.Button
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Private WithEvents stringToWriteLabel As System.Windows.Forms.Label
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Private WithEvents stringToReadLabel As System.Windows.Forms.Label
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<System.Diagnostics.DebuggerStepThrough()> _
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Private Sub InitializeComponent()
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Me.queryButton = New System.Windows.Forms.Button()
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Me.writeButton = New System.Windows.Forms.Button()
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Me.readButton = New System.Windows.Forms.Button()
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Me.openSessionButton = New System.Windows.Forms.Button()
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Me.writeTextBox = New System.Windows.Forms.TextBox()
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Me.readTextBox = New System.Windows.Forms.TextBox()
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Me.clearButton = New System.Windows.Forms.Button()
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Me.closeSessionButton = New System.Windows.Forms.Button()
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Me.stringToWriteLabel = New System.Windows.Forms.Label()
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Me.stringToReadLabel = New System.Windows.Forms.Label()
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Me.SuspendLayout()
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'
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'<27><>ѯ
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'
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Me.queryButton.Enabled = False
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Me.queryButton.Location = New System.Drawing.Point(6, 89)
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Me.queryButton.Name = "queryButton"
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Me.queryButton.Size = New System.Drawing.Size(89, 25)
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Me.queryButton.TabIndex = 3
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Me.queryButton.Text = "Query"
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'
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'д
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'
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Me.writeButton.Enabled = False
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Me.writeButton.Location = New System.Drawing.Point(95, 89)
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Me.writeButton.Name = "writeButton"
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Me.writeButton.Size = New System.Drawing.Size(89, 25)
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Me.writeButton.TabIndex = 4
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Me.writeButton.Text = "Write"
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'
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'<27><>
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'
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Me.readButton.Enabled = False
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Me.readButton.Location = New System.Drawing.Point(184, 89)
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Me.readButton.Name = "readButton"
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Me.readButton.Size = New System.Drawing.Size(88, 25)
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Me.readButton.TabIndex = 5
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Me.readButton.Text = "Read"
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'
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'<27><><EFBFBD><EFBFBD>
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'
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Me.openSessionButton.Location = New System.Drawing.Point(6, 5)
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Me.openSessionButton.Name = "openSessionButton"
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Me.openSessionButton.Size = New System.Drawing.Size(110, 24)
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Me.openSessionButton.TabIndex = 0
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Me.openSessionButton.Text = "Open Session"
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'
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'дָ<D0B4><D6B8>
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'
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Me.writeTextBox.Anchor = CType(((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left) _
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Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
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Me.writeTextBox.Enabled = False
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Me.writeTextBox.Location = New System.Drawing.Point(6, 58)
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Me.writeTextBox.Name = "writeTextBox"
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Me.writeTextBox.Size = New System.Drawing.Size(324, 21)
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Me.writeTextBox.TabIndex = 2
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Me.writeTextBox.Text = "*IDN?\n"
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'
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'<27><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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'
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Me.readTextBox.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
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Or System.Windows.Forms.AnchorStyles.Left) _
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Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
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Me.readTextBox.Location = New System.Drawing.Point(6, 146)
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Me.readTextBox.Multiline = True
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Me.readTextBox.Name = "readTextBox"
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Me.readTextBox.ReadOnly = True
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Me.readTextBox.ScrollBars = System.Windows.Forms.ScrollBars.Vertical
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Me.readTextBox.Size = New System.Drawing.Size(324, 119)
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Me.readTextBox.TabIndex = 6
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Me.readTextBox.TabStop = False
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'
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'<27><><EFBFBD><EFBFBD>
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'
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Me.clearButton.Anchor = CType(((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left) _
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Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
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Me.clearButton.Enabled = False
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Me.clearButton.Location = New System.Drawing.Point(7, 267)
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Me.clearButton.Name = "clearButton"
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Me.clearButton.Size = New System.Drawing.Size(324, 26)
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Me.clearButton.TabIndex = 7
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Me.clearButton.Text = "Clear"
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'
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'<27>ر<EFBFBD><D8B1><EFBFBD>Դ
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'
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Me.closeSessionButton.Enabled = False
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Me.closeSessionButton.Location = New System.Drawing.Point(116, 5)
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Me.closeSessionButton.Name = "closeSessionButton"
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Me.closeSessionButton.Size = New System.Drawing.Size(111, 24)
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Me.closeSessionButton.TabIndex = 1
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Me.closeSessionButton.Text = "Close Session"
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'
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'д<><D0B4><EFBFBD><EFBFBD>
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'
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Me.stringToWriteLabel.Location = New System.Drawing.Point(6, 37)
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Me.stringToWriteLabel.Name = "stringToWriteLabel"
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Me.stringToWriteLabel.Size = New System.Drawing.Size(109, 15)
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Me.stringToWriteLabel.TabIndex = 8
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Me.stringToWriteLabel.Text = "String to Write:"
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'
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'<27><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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'
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Me.stringToReadLabel.Location = New System.Drawing.Point(6, 126)
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Me.stringToReadLabel.Name = "stringToReadLabel"
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Me.stringToReadLabel.Size = New System.Drawing.Size(121, 16)
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Me.stringToReadLabel.TabIndex = 9
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Me.stringToReadLabel.Text = "String to Read:"
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'
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'<27><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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'
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Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
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Me.ClientSize = New System.Drawing.Size(338, 301)
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Me.Controls.Add(Me.stringToReadLabel)
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Me.Controls.Add(Me.stringToWriteLabel)
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Me.Controls.Add(Me.closeSessionButton)
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Me.Controls.Add(Me.clearButton)
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Me.Controls.Add(Me.readTextBox)
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Me.Controls.Add(Me.writeTextBox)
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Me.Controls.Add(Me.openSessionButton)
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Me.Controls.Add(Me.readButton)
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Me.Controls.Add(Me.writeButton)
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Me.Controls.Add(Me.queryButton)
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Me.MaximizeBox = False
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Me.MinimumSize = New System.Drawing.Size(354, 340)
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Me.Name = "MainForm"
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Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
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Me.Text = "Simple Read/Write"
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Me.ResumeLayout(False)
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Me.PerformLayout()
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End Sub
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#End Region
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<STAThread()> _
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Public Shared Sub Main()
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Application.Run(New MainForm)
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End Sub
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Private Sub openSession_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles openSessionButton.Click
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Dim sr As SelectResource = New SelectResource
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If lastResourceString <> Nothing Then
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sr.ResourceName = lastResourceString
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End If
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Dim result As DialogResult = sr.ShowDialog(Me)
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If result = Windows.Forms.DialogResult.OK Then
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lastResourceString = sr.ResourceName
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Windows.Forms.Cursor.Current = Cursors.WaitCursor
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Try
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mbSession = CType(ResourceManager.GetLocalManager().Open(sr.ResourceName), MessageBasedSession)
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SetupControlState(True)
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Catch exp As InvalidCastException
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MessageBox.Show("Resource selected must be a message-based session")
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Catch exp As Exception
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MessageBox.Show(exp.Message)
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Finally
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Windows.Forms.Cursor.Current = Cursors.Default
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End Try
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End If
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sr.Dispose()
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End Sub
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Private Sub closeSession_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles closeSessionButton.Click
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SetupControlState(False)
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mbSession.Dispose()
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End Sub
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Private Sub query_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles queryButton.Click
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Windows.Forms.Cursor.Current = Cursors.WaitCursor
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Try
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Dim textToWrite As String = ReplaceCommonEscapeSequences(writeTextBox.Text)
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Dim responseString As String = mbSession.Query(textToWrite)
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readTextBox.Text = InsertCommonEscapeSequences(responseString)
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Catch exp As Exception
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MessageBox.Show(exp.Message)
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Finally
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Windows.Forms.Cursor.Current = Cursors.Default
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End Try
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End Sub
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Private Sub write_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles writeButton.Click
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Try
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Dim textToWrite As String = ReplaceCommonEscapeSequences(writeTextBox.Text)
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mbSession.Write(textToWrite)
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Catch exp As Exception
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MessageBox.Show(exp.Message)
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End Try
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End Sub
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Private Sub read_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles readButton.Click
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Windows.Forms.Cursor.Current = Cursors.WaitCursor
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Try
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Dim responseString As String = mbSession.ReadString()
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readTextBox.Text = InsertCommonEscapeSequences(responseString)
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Catch exp As Exception
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MessageBox.Show(exp.Message)
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Finally
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Windows.Forms.Cursor.Current = Cursors.Default
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End Try
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End Sub
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Private Sub clear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles clearButton.Click
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readTextBox.Text = String.Empty
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End Sub
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Private Sub SetupControlState(ByVal isSessionOpen As Boolean)
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openSessionButton.Enabled = Not isSessionOpen
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closeSessionButton.Enabled = isSessionOpen
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queryButton.Enabled = isSessionOpen
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writeButton.Enabled = isSessionOpen
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readButton.Enabled = isSessionOpen
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writeTextBox.Enabled = isSessionOpen
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clearButton.Enabled = isSessionOpen
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If isSessionOpen Then
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readTextBox.Text = String.Empty
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writeTextBox.Focus()
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End If
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End Sub
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Private Function ReplaceCommonEscapeSequences(ByVal s As String) As String
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Return s.Replace("\n", vbLf).Replace("\r", vbCr)
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End Function
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Private Function InsertCommonEscapeSequences(ByVal s As String) As String
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Return s.Replace(vbLf, "\n").Replace(vbCr, "\r")
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End Function
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End Class
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