主form上的图片如果实现拉伸

Question

在paint事件中自己画上去，（没记错的话）画图片的方法可以指定实际画出的大小

Answer 1

System.Drawing.Bitmap myBit=new System.Drawing.Bitmap(
"E:\\Tools\\photo\\Photo\\228569.jpg",false);
Graphics GraphicsMyg=this.CreateGraphics();
GraphicsMyg.DrawImage(myBit,0,0,this.Width,this.Height);

Answer 2

把上面的代码加入到OnPaint事件中，如下：
protected override void OnPaint(PaintEventArgs e)
{
    System.Drawing.Bitmap myBit=new System.Drawing.Bitmap(
背景图片文件名,false);
    Graphics GraphicsMyg=this.CreateGraphics();
    GraphicsMyg.DrawImage(myBit,0,0,this.Width,this.Height);
}

Answer 3

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Diagnostics;
using System.Data;namespace WindowsApplication1
{
public class Form1 : System.Windows.Forms.Form
{
private int ox;
private int oy;
private Control control; private System.Windows.Forms.Button button1;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Button button3;
private System.Windows.Forms.Button button4;
private System.Windows.Forms.Button button5;
private System.Windows.Forms.Splitter splitter1;
private System.Windows.Forms.Splitter splitter2;
private System.Windows.Forms.Splitter splitter3;
private System.Windows.Forms.Splitter splitter4;
private System.ComponentModel.Container components = null; public Form1()
{
InitializeComponent();
} 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()
{
this.button1 = new System.Windows.Forms.Button();
this.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.button4 = new System.Windows.Forms.Button();
this.button5 = new System.Windows.Forms.Button();
this.splitter1 = new System.Windows.Forms.Splitter();
this.splitter2 = new System.Windows.Forms.Splitter();
this.splitter3 = new System.Windows.Forms.Splitter();
this.splitter4 = new System.Windows.Forms.Splitter();
this.SuspendLayout();
// 
// button1
// 
this.button1.BackColor = System.Drawing.SystemColors.ActiveBorder;
this.button1.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.button1.Location = new System.Drawing.Point(248, 128);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(160, 64);
this.button1.TabIndex = 0;
this.button1.Text = "sdfffsdfsdfsdfsdfsd";
this.button1.MouseUp += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseUp);
this.button1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.button1_MouseMove);
this.button1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Control_MouseDown);
// 
// label1
// 
this.label1.Location = new System.Drawing.Point(184, 32);
this.label1.Name = "label1";
this.label1.TabIndex = 1;
this.label1.Text = "label1";
// 
// label2
// 
this.label2.Location = new System.Drawing.Point(296, 32);
this.label2.Name = "label2";
this.label2.TabIndex = 2;
this.label2.Text = "label2";
// 
// button2
// 
this.button2.Dock = System.Windows.Forms.DockStyle.Left;
this.button2.Location = new System.Drawing.Point(0, 0);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(75, 326);
this.button2.TabIndex = 3;
this.button2.Text = "button2";
// 
// button3
// 
this.button3.Dock = System.Windows.Forms.DockStyle.Bottom;
this.button3.Location = new System.Drawing.Point(75, 303);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(568, 23);
this.button3.TabIndex = 4;
this.button3.Text = "button3";
// 
// button4
// 
this.button4.Dock = System.Windows.Forms.DockStyle.Top;
this.button4.Location = new System.Drawing.Point(75, 0);
this.button4.Name = "button4";
this.button4.Size = new System.Drawing.Size(568, 23);
this.button4.TabIndex = 5;
this.button4.Text = "button4";
// 
// button5
// 
this.button5.Dock = System.Windows.Forms.DockStyle.Right;
this.button5.Location = new System.Drawing.Point(568, 23);
this.button5.Name = "button5";
this.button5.Size = new System.Drawing.Size(75, 280);
this.button5.TabIndex = 6;
this.button5.Text = "button5";
// 
// splitter1
// 
this.splitter1.Location = new System.Drawing.Point(75, 23);
this.splitter1.Name = "splitter1";
this.splitter1.Size = new System.Drawing.Size(3, 280);
this.splitter1.TabIndex = 7;
this.splitter1.TabStop = false;
// 
// splitter2
// 
this.splitter2.Dock = System.Windows.Forms.DockStyle.Bottom;
this.splitter2.Location = new System.Drawing.Point(78, 300);
this.splitter2.Name = "splitter2";
this.splitter2.Size = new System.Drawing.Size(490, 3);
this.splitter2.TabIndex = 8;
this.splitter2.TabStop = false;
// 
// splitter3
// 
this.splitter3.Dock = System.Windows.Forms.DockStyle.Right;
this.splitter3.Location = new System.Drawing.Point(565, 23);
this.splitter3.Name = "splitter3";
this.splitter3.Size = new System.Drawing.Size(3, 277);
this.splitter3.TabIndex = 9;
this.splitter3.TabStop = false;
// 
// splitter4
// 
this.splitter4.Dock = System.Windows.Forms.DockStyle.Top;
this.splitter4.Location = new System.Drawing.Point(78, 23);
this.splitter4.Name = "splitter4";
this.splitter4.Size = new System.Drawing.Size(487, 3);
this.splitter4.TabIndex = 10;
this.splitter4.TabStop = false;
// 
// Form1
// 
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(643, 326);
this.Controls.Add(this.splitter4);
this.Controls.Add(this.splitter3);
this.Controls.Add(this.splitter2);
this.Controls.Add(this.splitter1);
this.Controls.Add(this.button5);
this.Controls.Add(this.button4);
this.Controls.Add(this.button3);
this.Controls.Add(this.button2);
this.Controls.Add(this.label2);
this.Controls.Add(this.label1);
this.Controls.Add(this.button1);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
this.Name = "Form1";
this.Text = "Form1";
this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseDown);
this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseUp);
this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseMove);
this.ResumeLayout(false); }
#endregion [STAThread]
static void Main() 
{
Application.Run(new Form1());
}

Answer 4

private void Form1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
if(this.control == null)
return; if(e.Button == MouseButtons.Left)
{
if(this.Cursor == Cursors.SizeWE&&left==false) 
{
this.control.Width += (e.X - ox);
ox = e.X;
return;
}
else if(this.Cursor == Cursors.SizeWE&&left==true)
{
this.control.Width += (e.X - ox);
this.control.Location=new Point(e.X+e.X-ox,oy);
ox = e.X;
return;

}
if(this.Cursor == Cursors.SizeNS)
{
this.control.Height += (e.Y - oy);
oy = e.Y;
return;
}
if(this.Cursor == Cursors.SizeNWSE)
{
this.control.Width += (e.X - ox);
this.control.Height += (e.Y - oy);
ox = e.X;
oy = e.Y;
return;
}
if(this.Cursor==Cursors.SizeAll)
{
//this.control.Left += ( ox-e.X);
//this.control.Top  += (e.Y - oy);

//int x=((Control)sender).Left-e.X;
//int y=((Control)sender).Top-e.Y;
//this.control.Location=new Point(x,y);
return;
}
}

} private void Control_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
if(e.Button == MouseButtons.Left)
{
ox = e.X + ((Control)sender).Left;
oy = e.Y + ((Control)sender).Top;
this.Capture = true;
}
label1.Text=((Control)sender).Left.ToString();
label2.Text=e.X.ToString();

}
private bool left;
private bool leftshang;
private bool leftxia;
private bool shang;
private void button1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
this.control = (Control)sender;
if(e.X<10)
{
this.Cursor=Cursors.SizeWE;
left=true;
if(e.Y<10)
{
this.Cursor=Cursors.SizeNWSE;
leftshang=true;
}
else if(e.Y>(this.control.ClientSize.Height-10))
{
leftxia=true;
this.Cursor=Cursors.SizeNESW;
}

}
else if(e.X>(this.control.ClientSize.Width-10))
{
this.Cursor=Cursors.SizeWE;
left=false;
if(e.Y<10)
{
leftshang=false;
this.Cursor=Cursors.SizeNESW;
}
else if(e.Y>(this.control.ClientSize.Height-10))
{
leftxia=false;
this.Cursor=Cursors.SizeNWSE;
}
}
else if(e.Y<10||(e.Y>(this.control.ClientSize.Height-10)))
{
if(e.Y<10)
{
shang=true;
}
else
{
shang=false;
}
this.Cursor=Cursors.SizeNS;
}
else
{
this.Cursor=Cursors.SizeAll;

}
} private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
this.control = null;
} private void Form1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{
if(e.Button == MouseButtons.Left)
{
this.Capture = false;
this.Cursor = Cursors.Default;
}
}
}
}