332 lines
13 KiB
C#
332 lines
13 KiB
C#
using System;
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using System.Drawing;
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using System.Collections;
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using System.ComponentModel;
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using System.Windows.Forms;
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using System.Data;
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using NationalInstruments.VisaNS;
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namespace NationalInstruments.Examples.SimpleReadWrite
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{
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/// <summary>
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/// Summary description for Form1.
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/// </summary>
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public class MainForm : System.Windows.Forms.Form
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{
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private MessageBasedSession mbSession;
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private string lastResourceString = null;
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private System.Windows.Forms.TextBox writeTextBox;
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private System.Windows.Forms.TextBox readTextBox;
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private System.Windows.Forms.Button queryButton;
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private System.Windows.Forms.Button writeButton;
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private System.Windows.Forms.Button readButton;
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private System.Windows.Forms.Button openSessionButton;
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private System.Windows.Forms.Button clearButton;
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private System.Windows.Forms.Button closeSessionButton;
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private System.Windows.Forms.Label stringToWriteLabel;
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private System.Windows.Forms.Label stringToReadLabel;
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/// <summary>
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/// Required designer variable.
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/// </summary>
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private System.ComponentModel.Container components = null;
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public MainForm()
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{
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//
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// Required for Windows Form Designer support
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//
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InitializeComponent();
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SetupControlState(false);
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}
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/// <summary>
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/// Clean up any resources being used.
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/// </summary>
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protected override void Dispose( bool disposing )
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{
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if( disposing )
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{
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if(mbSession != null)
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{
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mbSession.Dispose();
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}
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if (components != null)
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{
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components.Dispose();
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}
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}
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base.Dispose( disposing );
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}
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#region Windows Form Designer generated code
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/// <summary>
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/// Required method for Designer support - do not modify
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/// the contents of this method with the code editor.
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/// </summary>
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private void InitializeComponent()
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{
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this.queryButton = new System.Windows.Forms.Button();
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this.writeButton = new System.Windows.Forms.Button();
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this.readButton = new System.Windows.Forms.Button();
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this.openSessionButton = new System.Windows.Forms.Button();
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this.writeTextBox = new System.Windows.Forms.TextBox();
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this.readTextBox = new System.Windows.Forms.TextBox();
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this.clearButton = new System.Windows.Forms.Button();
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this.closeSessionButton = new System.Windows.Forms.Button();
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this.stringToWriteLabel = new System.Windows.Forms.Label();
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this.stringToReadLabel = new System.Windows.Forms.Label();
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this.SuspendLayout();
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//
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// queryButton
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//
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this.queryButton.Location = new System.Drawing.Point(6, 89);
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this.queryButton.Name = "queryButton";
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this.queryButton.Size = new System.Drawing.Size(89, 25);
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this.queryButton.TabIndex = 3;
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this.queryButton.Text = "Query";
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this.queryButton.Click += new System.EventHandler(this.query_Click);
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//
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// writeButton
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//
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this.writeButton.Location = new System.Drawing.Point(95, 89);
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this.writeButton.Name = "writeButton";
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this.writeButton.Size = new System.Drawing.Size(89, 25);
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this.writeButton.TabIndex = 4;
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this.writeButton.Text = "Write";
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this.writeButton.Click += new System.EventHandler(this.write_Click);
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//
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// readButton
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//
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this.readButton.Location = new System.Drawing.Point(184, 89);
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this.readButton.Name = "readButton";
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this.readButton.Size = new System.Drawing.Size(88, 25);
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this.readButton.TabIndex = 5;
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this.readButton.Text = "Read";
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this.readButton.Click += new System.EventHandler(this.read_Click);
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//
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// openSessionButton
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//
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this.openSessionButton.Location = new System.Drawing.Point(6, 5);
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this.openSessionButton.Name = "openSessionButton";
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this.openSessionButton.Size = new System.Drawing.Size(110, 24);
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this.openSessionButton.TabIndex = 0;
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this.openSessionButton.Text = "Open Session";
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this.openSessionButton.Click += new System.EventHandler(this.openSession_Click);
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//
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// writeTextBox
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//
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this.writeTextBox.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
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| System.Windows.Forms.AnchorStyles.Right)));
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this.writeTextBox.Location = new System.Drawing.Point(6, 58);
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this.writeTextBox.Name = "writeTextBox";
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this.writeTextBox.Size = new System.Drawing.Size(324, 21);
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this.writeTextBox.TabIndex = 2;
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this.writeTextBox.Text = "*IDN?\\n";
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//
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// readTextBox
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//
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this.readTextBox.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
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| System.Windows.Forms.AnchorStyles.Left)
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| System.Windows.Forms.AnchorStyles.Right)));
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this.readTextBox.Location = new System.Drawing.Point(6, 146);
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this.readTextBox.Multiline = true;
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this.readTextBox.Name = "readTextBox";
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this.readTextBox.ReadOnly = true;
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this.readTextBox.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
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this.readTextBox.Size = new System.Drawing.Size(324, 119);
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this.readTextBox.TabIndex = 6;
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this.readTextBox.TabStop = false;
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//
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// clearButton
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//
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this.clearButton.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)
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| System.Windows.Forms.AnchorStyles.Right)));
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this.clearButton.Location = new System.Drawing.Point(7, 267);
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this.clearButton.Name = "clearButton";
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this.clearButton.Size = new System.Drawing.Size(324, 26);
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this.clearButton.TabIndex = 7;
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this.clearButton.Text = "Clear";
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this.clearButton.Click += new System.EventHandler(this.clear_Click);
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//
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// closeSessionButton
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//
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this.closeSessionButton.Location = new System.Drawing.Point(116, 5);
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this.closeSessionButton.Name = "closeSessionButton";
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this.closeSessionButton.Size = new System.Drawing.Size(111, 24);
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this.closeSessionButton.TabIndex = 1;
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this.closeSessionButton.Text = "Close Session";
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this.closeSessionButton.Click += new System.EventHandler(this.closeSession_Click);
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//
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// stringToWriteLabel
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//
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this.stringToWriteLabel.Location = new System.Drawing.Point(6, 37);
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this.stringToWriteLabel.Name = "stringToWriteLabel";
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this.stringToWriteLabel.Size = new System.Drawing.Size(109, 15);
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this.stringToWriteLabel.TabIndex = 8;
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this.stringToWriteLabel.Text = "String to Write:";
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//
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// stringToReadLabel
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//
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this.stringToReadLabel.Location = new System.Drawing.Point(6, 126);
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this.stringToReadLabel.Name = "stringToReadLabel";
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this.stringToReadLabel.Size = new System.Drawing.Size(121, 16);
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this.stringToReadLabel.TabIndex = 9;
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this.stringToReadLabel.Text = "String to Read:";
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//
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// MainForm
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//
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this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
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this.ClientSize = new System.Drawing.Size(338, 301);
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this.Controls.Add(this.stringToReadLabel);
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this.Controls.Add(this.stringToWriteLabel);
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this.Controls.Add(this.closeSessionButton);
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this.Controls.Add(this.clearButton);
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this.Controls.Add(this.readTextBox);
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this.Controls.Add(this.writeTextBox);
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this.Controls.Add(this.openSessionButton);
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this.Controls.Add(this.readButton);
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this.Controls.Add(this.writeButton);
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this.Controls.Add(this.queryButton);
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this.MaximizeBox = false;
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this.MinimumSize = new System.Drawing.Size(354, 340);
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this.Name = "MainForm";
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this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
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this.Text = "Simple Read/Write";
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this.ResumeLayout(false);
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this.PerformLayout();
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}
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#endregion
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/// <summary>
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/// The main entry point for the application.
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/// </summary>
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[STAThread]
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static void Main()
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{
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Application.Run(new MainForm());
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}
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private void openSession_Click(object sender, System.EventArgs e)
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{
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using (SelectResource sr = new SelectResource())
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{
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if(lastResourceString != null)
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{
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sr.ResourceName = lastResourceString;
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}
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DialogResult result = sr.ShowDialog(this);
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if(result == DialogResult.OK)
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{
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lastResourceString = sr.ResourceName;
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Cursor.Current = Cursors.WaitCursor;
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try
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{
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mbSession = (MessageBasedSession)ResourceManager.GetLocalManager().Open(sr.ResourceName);
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SetupControlState(true);
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}
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catch(InvalidCastException)
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{
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MessageBox.Show("Resource selected must be a message-based session");
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}
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catch(Exception exp)
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{
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MessageBox.Show(exp.Message);
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}
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finally
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{
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Cursor.Current = Cursors.Default;
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}
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}
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}
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}
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private void closeSession_Click(object sender, System.EventArgs e)
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{
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SetupControlState(false);
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mbSession.Dispose();
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}
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private void query_Click(object sender, System.EventArgs e)
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{
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Cursor.Current = Cursors.WaitCursor;
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try
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{
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string textToWrite = ReplaceCommonEscapeSequences(writeTextBox.Text);
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string responseString = mbSession.Query(textToWrite);
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readTextBox.Text = InsertCommonEscapeSequences(responseString);
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}
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catch(Exception exp)
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{
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MessageBox.Show(exp.Message);
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}
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finally
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{
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Cursor.Current = Cursors.Default;
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}
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}
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private void write_Click(object sender, System.EventArgs e)
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{
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try
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{
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string textToWrite = ReplaceCommonEscapeSequences(writeTextBox.Text);
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mbSession.Write(textToWrite);
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}
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catch(Exception exp)
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{
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MessageBox.Show(exp.Message);
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}
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}
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private void read_Click(object sender, System.EventArgs e)
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{
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Cursor.Current = Cursors.WaitCursor;
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try
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{
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string responseString = mbSession.ReadString();
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readTextBox.Text = InsertCommonEscapeSequences(responseString);
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}
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catch(Exception exp)
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{
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MessageBox.Show(exp.Message);
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}
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finally
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{
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Cursor.Current = Cursors.Default;
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}
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}
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private void clear_Click(object sender, System.EventArgs e)
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{
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readTextBox.Text = String.Empty;
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}
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private void SetupControlState(bool isSessionOpen)
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{
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openSessionButton.Enabled = !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)
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{
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readTextBox.Text = String.Empty;
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writeTextBox.Focus();
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}
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}
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private string ReplaceCommonEscapeSequences(string s)
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{
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return s.Replace("\\n", "\n").Replace("\\r", "\r");
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}
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private string InsertCommonEscapeSequences(string s)
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{
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return s.Replace("\n", "\\n").Replace("\r", "\\r");
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}
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}
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}
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