winform 纹理效果显示图像 例子源码

  
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Linq;using System.Windows.Forms;using System.Drawing.Imaging;namespace ImageGrain{ public partial class Frm_Main : Form { Bitmap myBitmap; public Frm_Main() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { openFileDialog1.Filter = "*.jpg,*.jpeg,*.bmp|*.jpg;*.jpeg;*.bmp";//设置文件的类型 openFileDialog1.ShowDialog(); //打开文件对话框 Image myImage = System.Drawing.Image.FromFile(openFileDialog1.FileName); //根据文件的路径实例化Image类 myBitmap = new Bitmap(myImage);//实例化Bitmap类 this.BackgroundImage = myBitmap; //显示打开的图片 } private void button2_Click(object sender, EventArgs e) { try { Image myImage = System.Drawing.Image.FromFile(openFileDialog1.FileName);//实例化Image类 myBitmap = new Bitmap(myImage); //实例化Bitmap类 Rectangle rect = new Rectangle(0, 0, myBitmap.Width, myBitmap.Height);//实例化Rectangle类 System.Drawing.Imaging.BitmapData bmpData = myBitmap.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadWrite, myBitmap.PixelFormat); //将指定图像锁定到内存中 IntPtr ptr = bmpData.Scan0; //获得图像中第一个像素数据的地址 int bytes = myBitmap.Width * myBitmap.Height * 3;//设置大小 byte[] rgbValues = new byte[bytes];//实例化byte数组 System.Runtime.InteropServices.Marshal.Copy(ptr, rgbValues, 0, bytes); //使用RGB值为声明的rgbValues数组赋值 for (int counter = 0; counter < rgbValues.Length; counter = 3)//初始化大小 rgbValues[counter] = 255; System.Runtime.InteropServices.Marshal.Copy(rgbValues, 0, ptr, bytes); //使用RGB值为图像的像素点着色 myBitmap.UnlockBits(bmpData); //从内存中解锁图像 this.BackgroundImage = myBitmap;//显示设置后的图片 } catch { } } }}