Web Browser usual actions

Posted on February 11, 2011June 27, 2015 by coder

   
 
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
    public class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void webBrowser1_DocumentTitleChanged(object sender, EventArgs e)
        {
            this.Text = webBrowser1.DocumentTitle.ToString();
        }

        private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == (char)13)
            {
                webBrowser1.Navigate(textBox1.Text);
            }
        }

        private void webBrowser1_Navigated(object sender,
           WebBrowserNavigatedEventArgs e)
        {
            textBox1.Text = webBrowser1.Url.ToString();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            buttonBack.Enabled = false;
            buttonForward.Enabled = false;
            buttonStop.Enabled = false;
        }

        private void buttonBack_Click(object sender, EventArgs e)
        {
            webBrowser1.GoBack();
            textBox1.Text = webBrowser1.Url.ToString();
        }

        private void buttonForward_Click(object sender, EventArgs e)
        {
            webBrowser1.GoForward();
            textBox1.Text = webBrowser1.Url.ToString();
        }

        private void buttonStop_Click(object sender, EventArgs e)
        {
            webBrowser1.Stop();
        }

        private void buttonHome_Click(object sender, EventArgs e)
        {
            webBrowser1.GoHome();
            textBox1.Text = webBrowser1.Url.ToString();
        }

        private void buttonRefresh_Click(object sender, EventArgs e)
        {
            webBrowser1.Refresh();
        }

        private void buttonSubmit_Click(object sender, EventArgs e)
        {
            webBrowser1.Navigate(textBox1.Text);
        }

        private void webBrowser1_CanGoBackChanged(object sender, EventArgs e)
        {
            if (webBrowser1.CanGoBack == true)
            {
                buttonBack.Enabled = true;
            }
            else
            {
                buttonBack.Enabled = false;
            }
        }

        private void webBrowser1_CanGoForwardChanged(object sender, EventArgs e)
        {
            if (webBrowser1.CanGoForward == true)
            {
                buttonForward.Enabled = true;
            }
            else
            {
                buttonForward.Enabled = false;
            }
        }

        private void webBrowser1_Navigating(object sender,
           WebBrowserNavigatingEventArgs e)
        {
            buttonStop.Enabled = true;
        }

        private void webBrowser1_DocumentCompleted(object sender,
           WebBrowserDocumentCompletedEventArgs e)
        {
            buttonStop.Enabled = false;
        }

        private void InitializeComponent()
        {
            this.webBrowser1 = new System.Windows.Forms.WebBrowser();
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.buttonSubmit = new System.Windows.Forms.Button();
            this.buttonRefresh = new System.Windows.Forms.Button();
            this.buttonHome = new System.Windows.Forms.Button();
            this.buttonStop = new System.Windows.Forms.Button();
            this.buttonForward = new System.Windows.Forms.Button();
            this.buttonBack = new System.Windows.Forms.Button();
            this.SuspendLayout();

            this.webBrowser1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
                        | System.Windows.Forms.AnchorStyles.Left)
                        | System.Windows.Forms.AnchorStyles.Right)));
            this.webBrowser1.Location = new System.Drawing.Point(15, 74);
            this.webBrowser1.MinimumSize = new System.Drawing.Size(20, 20);
            this.webBrowser1.Size = new System.Drawing.Size(700, 339);
            this.webBrowser1.DocumentCompleted += new System.Windows.Forms.WebBrowserDocumentCompletedEventHandler(this.webBrowser1_DocumentCompleted);

            this.textBox1.Location = new System.Drawing.Point(14, 47);
            this.textBox1.Size = new System.Drawing.Size(399, 20);
            this.textBox1.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBox1_KeyPress);

            this.buttonSubmit.Location = new System.Drawing.Point(419, 18);
            this.buttonSubmit.Size = new System.Drawing.Size(75, 49);
            this.buttonSubmit.Text = "Submit";
            this.buttonSubmit.UseVisualStyleBackColor = true;
            this.buttonSubmit.Click += new System.EventHandler(this.buttonSubmit_Click);

            this.buttonRefresh.Location = new System.Drawing.Point(338, 18);
            this.buttonRefresh.Size = new System.Drawing.Size(75, 23);
            this.buttonRefresh.Text = "Refresh";
            this.buttonRefresh.UseVisualStyleBackColor = true;
            this.buttonRefresh.Click += new System.EventHandler(this.buttonRefresh_Click);

            this.buttonHome.Location = new System.Drawing.Point(257, 18);
            this.buttonHome.Size = new System.Drawing.Size(75, 23);
            this.buttonHome.Text = "Home";
            this.buttonHome.UseVisualStyleBackColor = true;
            this.buttonHome.Click += new System.EventHandler(this.buttonHome_Click);

            this.buttonStop.Location = new System.Drawing.Point(176, 18);
            this.buttonStop.Size = new System.Drawing.Size(75, 23);
            this.buttonStop.Text = "Stop";
            this.buttonStop.UseVisualStyleBackColor = true;
            this.buttonStop.Click += new System.EventHandler(this.buttonStop_Click);

            this.buttonForward.Location = new System.Drawing.Point(95, 18);
            this.buttonForward.Size = new System.Drawing.Size(75, 23);
            this.buttonForward.Text = "Forward";
            this.buttonForward.UseVisualStyleBackColor = true;
            this.buttonForward.Click += new System.EventHandler(this.buttonForward_Click);

            this.buttonBack.Location = new System.Drawing.Point(14, 18);
            this.buttonBack.Size = new System.Drawing.Size(75, 23);
            this.buttonBack.Text = "Back";
            this.buttonBack.UseVisualStyleBackColor = true;
            this.buttonBack.Click += new System.EventHandler(this.buttonBack_Click);

            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(728, 430);
            this.Controls.Add(this.webBrowser1);
            this.Controls.Add(this.textBox1);
            this.Controls.Add(this.buttonSubmit);
            this.Controls.Add(this.buttonRefresh);
            this.Controls.Add(this.buttonHome);
            this.Controls.Add(this.buttonStop);
            this.Controls.Add(this.buttonForward);
            this.Controls.Add(this.buttonBack);
            this.ResumeLayout(false);
            this.PerformLayout();
        }
        private System.Windows.Forms.WebBrowser webBrowser1;
        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.Button buttonSubmit;
        private System.Windows.Forms.Button buttonRefresh;
        private System.Windows.Forms.Button buttonHome;
        private System.Windows.Forms.Button buttonStop;
        private System.Windows.Forms.Button buttonForward;
        private System.Windows.Forms.Button buttonBack;
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }

Simple WebBrowser

Posted on February 11, 2011June 27, 2015 by coder

   

/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury, 
   Zach Greenvoss, Shripad Kulkarni, Neil Whitlow

Publisher: Peer Information
ISBN: 1861007663
*/

using System;
using System.Windows.Forms;
using System.Drawing;
using AxSHDocVw;

public class WebBrowser : Form
{
   private AxWebBrowser browser;
   private Button goButton;
   private TextBox addressBox;
   private Panel panel1;
   private Panel panel2;

   public WebBrowser()
   {
      panel1 = new Panel();
      panel2 = new Panel();
      browser = new AxWebBrowser();
      browser.BeginInit();

      this.SuspendLayout();
      panel1.SuspendLayout();
      panel2.SuspendLayout();

      this.Text = "MyWebBrowser";
      panel1.Size = new Size(300, 30);
      panel1.Dock = DockStyle.Top;

      panel2.Size = new Size(285,240);
      panel2.Location = new Point(5, 31);
      panel2.Anchor = AnchorStyles.Top | AnchorStyles.Bottom | AnchorStyles.Left | AnchorStyles.Right;

      browser.Dock = DockStyle.Fill;

      addressBox = new TextBox();
      addressBox.Size = new Size(260, 20);
      addressBox.Location = new Point(5,5);
      addressBox.Anchor = AnchorStyles.Top | AnchorStyles.Right | AnchorStyles.Left;

      goButton = new Button();
      goButton.Image = Image.FromFile("Arrow.ico");
      goButton.Location = new Point(270,5);
      goButton.Size = new Size(20,20);
      goButton.Anchor = AnchorStyles.Top | AnchorStyles.Right;

      panel1.Controls.AddRange(new Control[] { addressBox, goButton });
      panel2.Controls.Add(browser);
      this.Controls.AddRange(new Control[] { panel1, panel2 });

      browser.EndInit();
      panel1.ResumeLayout();
      panel2.ResumeLayout();
      this.ResumeLayout();

      goButton.Click += new EventHandler(goButton_Click);
      browser.GoHome();
   }

   private void goButton_Click(object sender, EventArgs e)
   {
      object o = null;
      browser.Navigate(addressBox.Text, ref o, ref o, ref o, ref o);
   }

   [STAThread]
   public static void Main()
   {
      Application.Run(new WebBrowser());
   }
}

My Web Browser

Posted on February 11, 2011June 27, 2015 by coder


   

/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury, 
   Zach Greenvoss, Shripad Kulkarni, Neil Whitlow

Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace MyWebBrowser
{
  /// <summary>
  /// Summary description for MyWebBrowser.
  /// </summary>
  public class MyWebBrowser : System.Windows.Forms.Form
  {
      private System.Windows.Forms.Panel panel1;
      private System.Windows.Forms.Panel panel2;
      private System.Windows.Forms.TextBox addressBox;
      private System.Windows.Forms.Button goButton;
      private AxSHDocVw.AxWebBrowser axWebBrowser1;
    /// <summary>
    /// Required designer variable.
    /// </summary>
    private System.ComponentModel.Container components = null;

    public MyWebBrowser()
    {
      //
      // Required for Windows Form Designer support
      //
      InitializeComponent();
         axWebBrowser1.GoHome();
      //
      // TODO: Add any constructor code after InitializeComponent call
      //
    }

    /// <summary>
    /// Clean up any resources being used.
    /// </summary>
    protected override void Dispose( bool disposing )
    {
      if( disposing )
      {
        if (components != null) 
        {
          components.Dispose();
        }
      }
      base.Dispose( disposing );
    }

    #region Windows Form Designer generated code
    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
         System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(MyWebBrowser));
         this.panel1 = new System.Windows.Forms.Panel();
         this.goButton = new System.Windows.Forms.Button();
         this.addressBox = new System.Windows.Forms.TextBox();
         this.panel2 = new System.Windows.Forms.Panel();
         this.axWebBrowser1 = new AxSHDocVw.AxWebBrowser();
         this.panel1.SuspendLayout();
         this.panel2.SuspendLayout();
         ((System.ComponentModel.ISupportInitialize)(this.axWebBrowser1)).BeginInit();
         this.SuspendLayout();
         // 
         // panel1
         // 
         this.panel1.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                             this.goButton,
                                                                             this.addressBox});
         this.panel1.Dock = System.Windows.Forms.DockStyle.Top;
         this.panel1.Name = "panel1";
         this.panel1.Size = new System.Drawing.Size(408, 40);
         this.panel1.TabIndex = 0;
         // 
         // goButton
         // 
         this.goButton.Anchor = (System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right);
         this.goButton.Image = ((System.Drawing.Bitmap)(resources.GetObject("goButton.Image")));
         this.goButton.Location = new System.Drawing.Point(368, 8);
         this.goButton.Name = "goButton";
         this.goButton.Size = new System.Drawing.Size(32, 24);
         this.goButton.TabIndex = 1;
         this.goButton.Click += new System.EventHandler(this.goButton_Click);
         // 
         // addressBox
         // 
         this.addressBox.Anchor = ((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
            | System.Windows.Forms.AnchorStyles.Right);
         this.addressBox.Location = new System.Drawing.Point(8, 8);
         this.addressBox.Name = "addressBox";
         this.addressBox.Size = new System.Drawing.Size(344, 20);
         this.addressBox.TabIndex = 0;
         this.addressBox.Text = "";
         // 
         // panel2
         // 
         this.panel2.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
            | System.Windows.Forms.AnchorStyles.Left) 
            | System.Windows.Forms.AnchorStyles.Right);
         this.panel2.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                             this.axWebBrowser1});
         this.panel2.Location = new System.Drawing.Point(8, 48);
         this.panel2.Name = "panel2";
         this.panel2.Size = new System.Drawing.Size(392, 240);
         this.panel2.TabIndex = 1;
         // 
         // axWebBrowser1
         // 
         this.axWebBrowser1.ContainingControl = this;
         this.axWebBrowser1.Dock = System.Windows.Forms.DockStyle.Fill;
         this.axWebBrowser1.Enabled = true;
         this.axWebBrowser1.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("axWebBrowser1.OcxState")));
         this.axWebBrowser1.Size = new System.Drawing.Size(392, 240);
         this.axWebBrowser1.TabIndex = 0;
         // 
         // MyWebBrowser
         // 
         this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
         this.ClientSize = new System.Drawing.Size(408, 293);
         this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                      this.panel2,
                                                                      this.panel1});
         this.Name = "MyWebBrowser";
         this.Text = "MyWebBrowser";
         this.panel1.ResumeLayout(false);
         this.panel2.ResumeLayout(false);
         ((System.ComponentModel.ISupportInitialize)(this.axWebBrowser1)).EndInit();
         this.ResumeLayout(false);

      }
    #endregion

    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]
    static void Main() 
    {
      Application.Run(new MyWebBrowser());
    }

      private void goButton_Click(object sender, System.EventArgs e)
      {
         object o = null;
         object address = (object)addressBox.Text;
         axWebBrowser1.Navigate2(ref address, ref o, ref o, ref o, ref o);
      }
  }
}


           
          


MyWebBrowser.zip( 126 k)

WebBrowser in action

Posted on February 11, 2011June 27, 2015 by coder

   

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

public class Form1 : Form
{
  private System.Windows.Forms.WebBrowser webBrowser1;

  public Form1() {
        InitializeComponent();
        webBrowser1.Navigate("http://www.kutayzorlu.com/java2s/com");
  }
  private void InitializeComponent()
  {
        this.webBrowser1 = new System.Windows.Forms.WebBrowser();
        this.SuspendLayout();
        // 
        // webBrowser1
        // 
        this.webBrowser1.Dock = System.Windows.Forms.DockStyle.Fill;
        this.webBrowser1.Location = new System.Drawing.Point(0, 0);
        this.webBrowser1.Name = "webBrowser1";
        this.webBrowser1.Size = new System.Drawing.Size(600, 600);
        this.webBrowser1.TabIndex = 0;
        // 
        // Form1
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(600, 600);
        this.Controls.Add(this.webBrowser1);
        this.Text = "Split Window";
        this.ResumeLayout(false);

  }

  [STAThread]
  static void Main()
  {
    Application.EnableVisualStyles();
    Application.Run(new Form1());
  }

}

Error Provider to validate the text in a TextBox

Posted on February 11, 2011June 27, 2015 by coder


   


  using System;
  using System.Drawing;
  using System.Collections;
  using System.ComponentModel;
  using System.Windows.Forms;
  using System.Data;

  public class ErrorForm : System.Windows.Forms.Form
  {
    private System.Windows.Forms.Label label1;
    private System.Windows.Forms.Button btnValidate;
    private System.Windows.Forms.ErrorProvider errorProvider1;
    private System.Windows.Forms.TextBox txtInput;

    public ErrorForm()
    {
      InitializeComponent();
      CenterToScreen();
    }
    private void InitializeComponent()
    {
      this.errorProvider1 = new System.Windows.Forms.ErrorProvider();
      this.label1 = new System.Windows.Forms.Label();
      this.txtInput = new System.Windows.Forms.TextBox();
      this.btnValidate = new System.Windows.Forms.Button();
      this.SuspendLayout();
      // 
      // errorProvider1
      // 
      this.errorProvider1.BlinkRate = 500;
      this.errorProvider1.BlinkStyle = System.Windows.Forms.ErrorBlinkStyle.AlwaysBlink;
      // 
      // label1
      // 
      this.label1.Location = new System.Drawing.Point(8, 8);
      this.label1.Name = "label1";
      this.label1.Size = new System.Drawing.Size(376, 56);
      this.label1.TabIndex = 2;
      this.label1.Text = "The following text box only allows 5 characters.";
      // 
      // txtInput
      // 
      this.txtInput.Location = new System.Drawing.Point(144, 80);
      this.txtInput.Name = "txtInput";
      this.txtInput.Size = new System.Drawing.Size(120, 20);
      this.txtInput.TabIndex = 0;
      this.txtInput.Text = "";
      this.txtInput.Validating += new System.ComponentModel.CancelEventHandler(this.txtInput_Validating);
      // 
      // btnValidate
      // 
      this.btnValidate.Location = new System.Drawing.Point(16, 72);
      this.btnValidate.Name = "btnValidate";
      this.btnValidate.Size = new System.Drawing.Size(112, 32);
      this.btnValidate.TabIndex = 1;
      this.btnValidate.Text = "OK";
      // 
      // ErrorForm
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(400, 125);
      this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                      this.label1,
                                      this.btnValidate,
                                      this.txtInput});
      this.Name = "ErrorForm";
      this.Text = "Error Trapper";
      this.ResumeLayout(false);

    }

    static void Main() 
    {
      Application.Run(new ErrorForm());
    }

    private void txtInput_Validating(object sender, System.ComponentModel.CancelEventArgs e)
    {
      if(txtInput.Text.ToString().Length > 5) {
        errorProvider1.SetError( txtInput, "Can&#039;t be greater than 5!");
      } 
      else{
        errorProvider1.SetError(txtInput, "");
        }
    }
  }

TextBox value validation Demo

Posted on February 11, 2011June 27, 2015 by coder


   

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

  public class Form1 : System.Windows.Forms.Form
  {
    private System.Windows.Forms.Label lblName;
    private System.Windows.Forms.Label lblAddress;
    private System.Windows.Forms.Label lblOccupation;
    private System.Windows.Forms.Label lblAge;
    private System.Windows.Forms.Button btnOK;
    private System.Windows.Forms.Button btnHelp;
    private System.Windows.Forms.TextBox txtName;
    private System.Windows.Forms.TextBox txtAddress;
    private System.Windows.Forms.TextBox txtOccupation;
    private System.Windows.Forms.TextBox txtAge;

    public Form1()
    {
      InitializeComponent();
      this.btnOK.Enabled = false;

      this.txtAddress.Tag = false;
      this.txtAge.Tag = false;
      this.txtName.Tag = false;
      this.txtOccupation.Tag = false;

      this.txtName.Validating += new System.ComponentModel.CancelEventHandler(this.txtBoxEmpty_Validating);
      this.txtAddress.Validating += new System.ComponentModel.CancelEventHandler(this.txtBoxEmpty_Validating);
      this.txtOccupation.Validating += new System.ComponentModel.CancelEventHandler(this.txtOccupation_Validating);
      this.txtAge.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.txtAge_KeyPress);
      this.txtAge.Validating += new System.ComponentModel.CancelEventHandler(this.txtBoxEmpty_Validating);
      this.txtName.TextChanged += new System.EventHandler(this.txtBox_TextChanged);
      this.txtAddress.TextChanged += new System.EventHandler(this.txtBox_TextChanged);
      this.txtAge.TextChanged += new System.EventHandler(this.txtBox_TextChanged);
      this.txtOccupation.TextChanged += new System.EventHandler(this.txtBox_TextChanged);
    }
    private void InitializeComponent()
    {
      this.lblName = new System.Windows.Forms.Label();
      this.txtName = new System.Windows.Forms.TextBox();
      this.lblAge = new System.Windows.Forms.Label();
      this.btnOK = new System.Windows.Forms.Button();
      this.txtAge = new System.Windows.Forms.TextBox();
      this.txtAddress = new System.Windows.Forms.TextBox();
      this.lblAddress = new System.Windows.Forms.Label();
      this.lblOccupation = new System.Windows.Forms.Label();
      this.txtOccupation = new System.Windows.Forms.TextBox();
      this.btnHelp = new System.Windows.Forms.Button();
      this.SuspendLayout();
      // 
      // lblName
      // 
      this.lblName.Anchor = ((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
        | System.Windows.Forms.AnchorStyles.Left);
      this.lblName.Location = new System.Drawing.Point(8, 16);
      this.lblName.Name = "lblName";
      this.lblName.Size = new System.Drawing.Size(92, 23);
      this.lblName.TabIndex = 0;
      this.lblName.Text = "Name";
      // 
      // txtName
      // 
      this.txtName.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
        | System.Windows.Forms.AnchorStyles.Left) 
        | System.Windows.Forms.AnchorStyles.Right);
      this.txtName.Location = new System.Drawing.Point(112, 16);
      this.txtName.Name = "txtName";
      this.txtName.Size = new System.Drawing.Size(176, 20);
      this.txtName.TabIndex = 5;
      this.txtName.Text = "";
      // 
      // lblAge
      // 
      this.lblAge.Anchor = ((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
        | System.Windows.Forms.AnchorStyles.Left);
      this.lblAge.Location = new System.Drawing.Point(8, 144);
      this.lblAge.Name = "lblAge";
      this.lblAge.Size = new System.Drawing.Size(92, 23);
      this.lblAge.TabIndex = 3;
      this.lblAge.Text = "Age";
      // 
      // btnOK
      // 
      this.btnOK.Anchor = (System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right);
      this.btnOK.Location = new System.Drawing.Point(296, 16);
      this.btnOK.Name = "btnOK";
      this.btnOK.TabIndex = 10;
      this.btnOK.Text = "OK";
      this.btnOK.Click += new System.EventHandler(this.btnOK_Click);
      // 
      // txtAge
      // 
      this.txtAge.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
        | System.Windows.Forms.AnchorStyles.Left) 
        | System.Windows.Forms.AnchorStyles.Right);
      this.txtAge.Location = new System.Drawing.Point(112, 136);
      this.txtAge.Name = "txtAge";
      this.txtAge.Size = new System.Drawing.Size(176, 20);
      this.txtAge.TabIndex = 8;
      this.txtAge.Text = "";
      // 
      // txtAddress
      // 
      this.txtAddress.Anchor = ((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
        | System.Windows.Forms.AnchorStyles.Right);
      this.txtAddress.Location = new System.Drawing.Point(112, 40);
      this.txtAddress.Multiline = true;
      this.txtAddress.Name = "txtAddress";
      this.txtAddress.ScrollBars = System.Windows.Forms.ScrollBars.Both;
      this.txtAddress.Size = new System.Drawing.Size(176, 72);
      this.txtAddress.TabIndex = 6;
      this.txtAddress.Text = "";
      // 
      // lblAddress
      // 
      this.lblAddress.Anchor = ((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
        | System.Windows.Forms.AnchorStyles.Left);
      this.lblAddress.Location = new System.Drawing.Point(8, 40);
      this.lblAddress.Name = "lblAddress";
      this.lblAddress.Size = new System.Drawing.Size(92, 23);
      this.lblAddress.TabIndex = 1;
      this.lblAddress.Text = "Address";
      // 
      // lblOccupation
      // 
      this.lblOccupation.Anchor = ((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
        | System.Windows.Forms.AnchorStyles.Left);
      this.lblOccupation.Location = new System.Drawing.Point(8, 120);
      this.lblOccupation.Name = "lblOccupation";
      this.lblOccupation.Size = new System.Drawing.Size(92, 23);
      this.lblOccupation.TabIndex = 2;
      this.lblOccupation.Text = "Occupation";
      // 
      // txtOccupation
      // 
      this.txtOccupation.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
        | System.Windows.Forms.AnchorStyles.Left) 
        | System.Windows.Forms.AnchorStyles.Right);
      this.txtOccupation.Location = new System.Drawing.Point(112, 112);
      this.txtOccupation.Name = "txtOccupation";
      this.txtOccupation.Size = new System.Drawing.Size(176, 20);
      this.txtOccupation.TabIndex = 7;
      this.txtOccupation.Text = "";
      // 
      // btnHelp
      // 
      this.btnHelp.Anchor = (System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right);
      this.btnHelp.CausesValidation = false;
      this.btnHelp.Location = new System.Drawing.Point(296, 48);
      this.btnHelp.Name = "btnHelp";
      this.btnHelp.TabIndex = 11;
      this.btnHelp.Text = "Help";
      this.btnHelp.Click += new System.EventHandler(this.btnHelp_Click);
      // 
      // Form1
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(376, 253);
      this.Controls.AddRange(new System.Windows.Forms.Control[] {this.btnHelp,
                                                                       this.btnOK,
                                                                       this.txtAge,
                                                                       this.txtOccupation,
                                     this.txtAddress,
                                     this.txtName,
                                     this.lblAge,
                                     this.lblOccupation,
                                     this.lblAddress,
                                     this.lblName});
      this.MinimumSize = new System.Drawing.Size(384, 280);
      this.Name = "Form1";
      this.Text = "TestBoxTest";
      this.ResumeLayout(false);

    }
    static void Main() 
    {
      Application.Run(new Form1());
    }

    private void btnOK_Click(object sender, System.EventArgs e)
    {
      string output;
      output = "Name: " + this.txtName.Text + "
";
      output += "Address: " + this.txtAddress.Text + "
";
      output += "Occupation: " + this.txtOccupation.Text + "
";
      output += "Age: " + this.txtAge.Text;

      Console.WriteLine(output);
    }

    private void btnHelp_Click(object sender, System.EventArgs e)
    {
      string output;

      output = "Name = Your name" + "
";
      output += "Address = Your address" + "
";
      output += "Occupation = Only allowed value is &#039;Employee&#039; or empty" + "
";
      output += "Age = Your age";

      Console.WriteLine(output);
    }

    private void txtBoxEmpty_Validating(object sender, System.ComponentModel.CancelEventArgs e)
    {
      TextBox tb;

      tb = (TextBox)sender;

      if (tb.Text.Length == 0)
      {
        tb.BackColor = Color.Red;
        tb.Tag = false;
      }
      else
      {
        tb.BackColor = System.Drawing.SystemColors.Window;
        tb.Tag = true;
      }
      ValidateAll();
    }

    private void ValidateAll()
    {
      this.btnOK.Enabled = ((bool)(this.txtAddress.Tag) &amp;&amp;
        (bool)(this.txtAge.Tag) &amp;&amp;
        (bool)(this.txtName.Tag) &amp;&amp;
        (bool)(this.txtOccupation.Tag));
    }

    private void txtOccupation_Validating(object sender, System.ComponentModel.CancelEventArgs e)
    {
      TextBox tb = (TextBox)sender;

      if (tb.Text.CompareTo("Employee") == 0 || tb.Text.Length == 0)
      {
        tb.Tag = true;
        tb.BackColor = System.Drawing.SystemColors.Window;
      }
      else
      {
        tb.Tag = false;
        tb.BackColor = Color.Red;
      }

      ValidateAll();
    }

    private void txtAge_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
    {
      if ((e.KeyChar < 48 || e.KeyChar > 57) &amp;&amp; e.KeyChar != 8)
        e.Handled = true; // Remove the character
    }

    private void txtBox_TextChanged(object sender, System.EventArgs e)
    {
      TextBox tb = (TextBox)sender;

      if (tb.Text.Length == 0 &amp;&amp; tb != txtOccupation)
      {
        tb.Tag = false;
        tb.BackColor = Color.Red;
      }
      else if (tb == txtOccupation &amp;&amp; (tb.Text.Length != 0 &amp;&amp; tb.Text.CompareTo("Employee") != 0))
      {
        tb.Tag = false;
      }
      else
      {
        tb.Tag = true;
        tb.BackColor = SystemColors.Window;
      }

      ValidateAll();
    }
  }

The read-only property control.

Posted on February 11, 2011June 27, 2015 by coder

   
 


using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Windows.Forms;


public class TimerCounter : System.Windows.Forms.UserControl {
    private System.Windows.Forms.Timer timer1;
    private System.ComponentModel.IContainer components;
    private int fCounter = 0;
    public int Counter {
        get {
            return fCounter;
        }
    }
    public TimerCounter() {
        this.components = new System.ComponentModel.Container();
        this.timer1 = new System.Windows.Forms.Timer(this.components);
        this.timer1.Enabled = true;
        this.timer1.Interval = 1000;
        this.timer1.Tick += new System.EventHandler(this.OnTick);
        this.Name = "TimerCounter";
    }
    private void OnTick(object sender, System.EventArgs e) {
        fCounter++;
    }
}
public class Form1 : System.Windows.Forms.Form {
    private System.Windows.Forms.Label label1 = new System.Windows.Forms.Label();
    private System.Windows.Forms.Label CounterLabel;
    private System.Windows.Forms.Button Update;
    private System.ComponentModel.Container components = null;
    private TimerCounter counter;

    public Form1() {
        counter = new TimerCounter();
        this.CounterLabel = new System.Windows.Forms.Label();
        this.Update = new System.Windows.Forms.Button();
        this.SuspendLayout();
        this.label1.Location = new System.Drawing.Point(32, 24);
        this.label1.Size = new System.Drawing.Size(48, 23);
        this.label1.Text = "Counter: ";
        this.CounterLabel.Location = new System.Drawing.Point(96, 24);
        this.CounterLabel.Size = new System.Drawing.Size(32, 23);
        this.Update.Location = new System.Drawing.Point(80, 72);
        this.Update.Text = "Update";
        this.Update.Click += new System.EventHandler(this.Update_Click);
        this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
        this.ClientSize = new System.Drawing.Size(224, 133);
        this.Controls.AddRange(new System.Windows.Forms.Control[] {this.Update,this.CounterLabel,this.label1});
        this.ResumeLayout(false);
    }
    [STAThread]
    static void Main() {
        Application.Run(new Form1());
    }
    private void Update_Click(object sender, System.EventArgs e) {
        CounterLabel.Text = counter.Counter.ToString();
    }
}

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