c#高级绘图波形控件

c#该机绘图开发，波形控件，带源码，高端，比较难，需要认真学习才能看懂

using System;
using System.Drawing;

namespace GDIDB
{
	/// 

	/// Class to implement Double Buffering 
	/// NT Almond 
	/// 24 July 2003
	/// 

	/// 
	public class DBGraphics
	{
		private	Graphics	graphics;
		private Bitmap		memoryBitmap;
		private	int			width;
		private	int			height;

		/// 

		/// Default constructor
		/// 

		public DBGraphics（）
		{
			width	= 0;
			height	= 0;
		}

		/// 

		/// Creates double buffer object
		/// 

		/// Window forms Graphics object
		/// width of paint area
		/// height of paint area
		/// true/false if double buffer is created
		public bool CreateDoubleBuffer（Graphics g int width int height）
		{

			if （memoryBitmap != null）
			{
				memoryBitmap.Dispose（）;
				memoryBitmap = null;
			}

			if （graphics != null）
			{
				graphics.Dispose（）;
				graphics = null;
			}

			if （width <= 0 || height <= 0）
				return false;


			if （（width != this.width） || （height != this.height））
			{
				this.width = width;
				this.height = height;

				memoryBitmap	= new Bitmap（width height）;
				graphics		= Graphics.FromImage（memoryBitmap）;
			}

			return true;
		}


		/// 

		/// Renders the double buffer to the screen
		/// 

		/// Window forms Graphics object
		public void Render（Graphics g）
		{
			if （memoryBitmap != null）
				g.DrawImage（memoryBitmap new Rectangle（00 width height）00 width height GraphicsUnit.Pixel）;
		}

		/// 

		/// 
		/// 

		/// true if double buffering can be achieved
		public bool CanDoubleBuffer（）
		{
			return graphics != null;
		}

		/// 

		/// Accessor for memory graphics object
		/// 

		public Graphics g 
		{
			get 
			{ 
				return graphics; 
			}
		}		
	}
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

    ..A..H.     32256  2017-07-21 14:58  高级绘图c#波形波形控件\ClassLibDemo\.vs\ClassLibDemo\v15\.suo

     文件       3520  2006-06-25 15:31  高级绘图c#波形波形控件\ClassLibDemo\Backup\Backup\ClassLibDemo\ClassLibDemo.csproj

     文件       2001  2004-12-17 15:44  高级绘图c#波形波形控件\ClassLibDemo\Backup\Backup\ClassLibDemo\DBGraphics.cs

     文件       6421  2006-06-25 15:29  高级绘图c#波形波形控件\ClassLibDemo\Backup\Backup\ClassLibDemo\Form1.cs

     文件       1365  2006-06-25 15:29  高级绘图c#波形波形控件\ClassLibDemo\Backup\Backup\ClassLibDemo\Form1.Designer.cs

     文件       5814  2006-06-25 15:29  高级绘图c#波形波形控件\ClassLibDemo\Backup\Backup\ClassLibDemo\Form1.resx

     文件        405  2006-06-25 15:20  高级绘图c#波形波形控件\ClassLibDemo\Backup\Backup\ClassLibDemo\Program.cs

     文件       1298  2006-06-25 15:49  高级绘图c#波形波形控件\ClassLibDemo\Backup\Backup\ClassLibDemo\Properties\AssemblyInfo.cs

     文件       2519  2006-06-25 15:20  高级绘图c#波形波形控件\ClassLibDemo\Backup\Backup\ClassLibDemo\Properties\Resources.Designer.cs

     文件       5612  2006-06-25 15:20  高级绘图c#波形波形控件\ClassLibDemo\Backup\Backup\ClassLibDemo\Properties\Resources.resx

     文件       1025  2006-06-25 15:20  高级绘图c#波形波形控件\ClassLibDemo\Backup\Backup\ClassLibDemo\Properties\Settings.Designer.cs

     文件        249  2006-06-25 15:20  高级绘图c#波形波形控件\ClassLibDemo\Backup\Backup\ClassLibDemo\Properties\Settings.settings

     文件        929  2006-06-25 15:21  高级绘图c#波形波形控件\ClassLibDemo\Backup\Backup\ClassLibDemo.sln

     文件      21464  2017-07-05 10:17  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\bin\Debug\ClassLibTest.vshost.exe

     文件        490  2015-10-30 15:19  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\bin\Debug\ClassLibTest.vshost.exe.manifest

     文件       3827  2017-07-05 10:17  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\ClassLibDemo.csproj

     文件       2001  2004-12-17 15:44  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\DBGraphics.cs

     文件       6421  2006-06-25 15:29  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\Form1.cs

     文件       1365  2006-06-25 15:29  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\Form1.Designer.cs

     文件       5814  2006-06-25 15:29  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\Form1.resx

     文件        377  2017-07-05 10:17  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\obj\Debug\ClassLibDemo.csproj.FileListAbsolute.txt

     文件        847  2017-07-05 10:17  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\obj\Debug\ClassLibDemo.csproj.GenerateResource.Cache

     文件        180  2017-07-05 10:17  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\obj\Debug\ClassLibTest.Form1.resources

     文件        180  2017-07-05 10:17  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\obj\Debug\ClassLibTest.Properties.Resources.resources

     文件       6142  2017-07-05 10:17  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件       4608  2017-07-05 10:17  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\obj\Debug\TempPE\Properties.Resources.Designer.cs.dll

     文件        405  2006-06-25 15:20  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\Program.cs

     文件       1298  2006-06-25 15:49  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\Properties\AssemblyInfo.cs

     文件       2864  2017-07-05 10:17  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\Properties\Resources.Designer.cs

     文件       5612  2006-06-25 15:20  高级绘图c#波形波形控件\ClassLibDemo\Backup\ClassLibDemo\Properties\Resources.resx

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