100分求一个用于C#上能带图片的按钮控件.
我想用C#开发WinCE的程序,找了半天没有找到怎么在按钮上放图片,听说是没有带这样的控件, 都是第三方的才行.
哪位有发给小弟一个.
[解决办法]
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;
namespace wince
{
class ImageButton : Control
{
//Private members
private Image image;
//flag to indicate the pressed state
private bool bPushed;
private Bitmap m_bmpOffscreen;
public ImageButton()
{
bPushed = false;
//default minimal size
this.Size = new Size(21, 21);
}
protected override void OnPaintBackground(PaintEventArgs e)
{
//Do nothing
}
public Image Image
{
get
{
return image;
}
set
{
image = value;
}
}
protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
{
Graphics gxOff; //Offscreen graphics
Rectangle imgRect; //image rectangle
Brush backBrush; //brush for filling a backcolor
if (m_bmpOffscreen == null) //Bitmap for doublebuffering
{
m_bmpOffscreen = new Bitmap(ClientSize.Width, ClientSize.Height);
}
gxOff = Graphics.FromImage(m_bmpOffscreen);
gxOff.Clear(this.BackColor);
if (!bPushed)
backBrush = new SolidBrush(Parent.BackColor);
else //change the background when it''s pressed
backBrush = new SolidBrush(Color.LightGray);
gxOff.FillRectangle(backBrush, this.ClientRectangle);
if (image != null)
{
//Center the image relativelly to the control
int imageLeft = (this.Width - image.Width) / 2;
int imageTop = (this.Height - image.Height) / 2;
if (!bPushed)
{
imgRect = new Rectangle(imageLeft, imageTop, image.Width,
image.Height);
}
else //The button was pressed
{
//Shift the image by one pixel
imgRect = new Rectangle(imageLeft + 1, imageTop + 1, image.Width,
image.Height);
}
//Set transparent key
ImageAttributes imageAttr = new ImageAttributes();
imageAttr.SetColorKey(BackgroundImageColor(image),
BackgroundImageColor(image));
//Draw image
gxOff.DrawImage(image, imgRect, 0, 0, image.Width, image.Height,
GraphicsUnit.Pixel, imageAttr);
}
if (bPushed) //The button was pressed
{
//Prepare rectangle
Rectangle rc = this.ClientRectangle;
rc.Width--;
rc.Height--;
//Draw rectangle
gxOff.DrawRectangle(new Pen(Color.Black), rc);
}
//Draw from the memory bitmap
e.Graphics.DrawImage(m_bmpOffscreen, 0, 0);
base.OnPaint(e);
}
private Color BackgroundImageColor(Image image)
{
Bitmap bmp = new Bitmap(image);
return bmp.GetPixel(0, 0);
}
protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs e)
{
bPushed = true;
this.Invalidate();
}
protected override void OnMouseUp(System.Windows.Forms.MouseEventArgs e)
{
bPushed = false;
this.Invalidate();
}
}
}
[解决办法]
自己画，这是根本的解决之道
