using System;
using System.Drawing;
using System.Windows.Forms;
class RandomClearResizeRedraw: Form
{
public static void Main()
{
Application.Run(new RandomClearResizeRedraw());
}
public RandomClearResizeRedraw()
{
ResizeRedraw = true;
}
protected override void OnPaint(PaintEventArgs pea)
{
Graphics graphics = pea.Graphics;
Random rand = new Random();
graphics.Clear(Color.FromArgb(rand.Next(256),
rand.Next(256),
rand.Next(256)));
}
}
Author: coder
Set ClientSize to change the form window size
using System;
using System.Drawing;
using System.Windows.Forms;
class AutoScaleDemo: Form
{
public static void Main()
{
Application.Run(new AutoScaleDemo());
}
public AutoScaleDemo()
{
Font = new Font(“Arial”, 12);
FormBorderStyle = FormBorderStyle.FixedSingle;
int[] aiPointSize = { 8, 12, 16, 24, 32 };
for (int i = 0; i < aiPointSize.Length; i++) { Button btn = new Button(); btn.Parent = this; btn.Text = "Use " + aiPointSize[i] + "-point font"; btn.Tag = aiPointSize[i]; btn.Location = new Point(4, 16 + 24 * i); btn.Size = new Size(80, 16); btn.Click += new EventHandler(ButtonOnClick); } ClientSize = new Size(88, 16 + 24 * aiPointSize.Length); AutoScaleBaseSize = new Size(4, 8); } protected override void OnPaint(PaintEventArgs pea) { pea.Graphics.DrawString(Text, Font, new SolidBrush(ForeColor), 0, 0); } void ButtonOnClick(object obj, EventArgs ea) { Button btn = (Button) obj; SizeF sizefOld = GetAutoScaleSize(Font); Font = new Font(Font.FontFamily, (int) btn.Tag); SizeF sizefNew = GetAutoScaleSize(Font); Scale(sizefNew.Width / sizefOld.Width,sizefNew.Height / sizefOld.Height); } } [/csharp]
Form Mouse down action
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Drawing2D;
public class Form1 : System.Windows.Forms.Form{
public Form1() {
InitializeComponent();
}
private void InitializeComponent() {
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Name = "Form1";
this.Text = "Form1";
this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseDown);
}
static void Main() {
Application.Run(new Form1());
}
private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) {
Console.WriteLine("Mouse down");
}
}
Form resize and redraw
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.CheckBox chkResizeRedraw;
public Form1() {
InitializeComponent();
}
private void FlawedResizing_Paint(object sender, PaintEventArgs e)
{
ResizeRedraw = chkResizeRedraw.Checked;
Pen pen = new Pen(Color.Red, 1);
e.Graphics.DrawEllipse(pen, new Rectangle(new Point(0, 0),
this.ClientSize));
pen.Dispose();
}
private void chkResizeRedraw_CheckedChanged(object sender, EventArgs e)
{
Invalidate();
}
private void InitializeComponent()
{
this.chkResizeRedraw = new System.Windows.Forms.CheckBox();
this.SuspendLayout();
//
// chkResizeRedraw
//
this.chkResizeRedraw.AutoSize = true;
this.chkResizeRedraw.Location = new System.Drawing.Point(102, 104);
this.chkResizeRedraw.Name = "chkResizeRedraw";
this.chkResizeRedraw.Size = new System.Drawing.Size(95, 17);
this.chkResizeRedraw.TabIndex = 0;
this.chkResizeRedraw.Text = "ResizeRedraw";
this.chkResizeRedraw.CheckedChanged += new System.EventHandler(this.chkResizeRedraw_CheckedChanged);
//
// FlawedResizing
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.Add(this.chkResizeRedraw);
this.Name = "FlawedResizing";
this.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Hide;
this.Text = "FlawedResizing";
this.Paint += new System.Windows.Forms.PaintEventHandler(this.FlawedResizing_Paint);
this.ResumeLayout(false);
this.PerformLayout();
}
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.Run(new Form1());
}
}
Form window load event
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 Button myButton;
public Form1()
{
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Load+=new EventHandler(Form_Load);
myButton = new Button();
myButton.Text = "www.kutayzorlu.com/java2s/com";
myButton.Location = new System.Drawing.Point(64, 32);
myButton.Size = new System.Drawing.Size(150, 50);
Controls.Add(myButton);
CenterToScreen();
}
public void Form_Load(object sender,EventArgs eArgs)
{
MessageBox.Show("Loading Form.....");
}
static void Main()
{
Application.Run(new Form1());
}
}
Bind key action to a form window
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
public class KeyReader : System.Windows.Forms.Form {
private System.Windows.Forms.Label lblPress;
private System.Windows.Forms.Label lblDown;
private System.Windows.Forms.Label label1;
public KeyReader() {
InitializeComponent();
}
private void InitializeComponent() {
this.lblPress = new System.Windows.Forms.Label();
this.lblDown = new System.Windows.Forms.Label();
this.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
this.lblPress.Font = new System.Drawing.Font("Microsoft Sans Serif", 30F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.lblPress.Location = new System.Drawing.Point(8, 190);
this.lblPress.Name = "lblPress";
this.lblPress.Size = new System.Drawing.Size(408, 48);
this.lblPress.TabIndex = 0;
this.lblPress.Text = "Press:";
this.lblPress.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.lblDown.Font = new System.Drawing.Font("Microsoft Sans Serif", 30F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.lblDown.Location = new System.Drawing.Point(8, 254);
this.lblDown.Name = "lblDown";
this.lblDown.Size = new System.Drawing.Size(408, 48);
this.lblDown.TabIndex = 0;
this.lblDown.Text = "Down:";
this.lblDown.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(424, 365);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.label1,
this.lblDown,
this.lblPress});
this.KeyPreview = true;
this.Name = "KeyReader";
this.Text = "KeyReader";
this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.KeyReader_KeyDown);
this.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.KeyReader_KeyPress);
this.ResumeLayout(false);
}
[STAThread]
static void Main() {
Application.Run(new KeyReader());
}
private void KeyReader_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e) {
lblPress.Text = "Press: " + Convert.ToString(e.KeyChar);
}
private void KeyReader_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e) {
lblDown.Text = "Down: " + Convert.ToString(e.KeyCode);
if (e.KeyCode == Keys.ShiftKey){
MessageBox.Show("That is one shifty character");
}
}
}
Form OnResize
using System;
using System.Drawing;
using System.Windows.Forms;
class FormSize: Form
{
public static void Main()
{
Application.Run(new FormSize());
}
public FormSize()
{
BackColor = Color.White;
}
protected override void OnResize(EventArgs ea)
{
Invalidate();
}
protected override void OnPaint(PaintEventArgs pea)
{
Graphics graphics = pea.Graphics;
string str = "Location: " + Location + "
" +
"ClientRectangle: " + ClientRectangle;
graphics.DrawString(str, Font, Brushes.Black, 0, 0);
}
}