WPF(Windows Presentation Foundation)是微软推出的基于Windows 的用户界面框架,属于.NET Framework 3.0的一部分。它提供了统一的编程模型、语言和框架,真正做到了分离界面设计人员与开发人员的工作;同时它提供了全新的多媒体交互用户图形界面。
还是话不多说,直接上码:
1.新建WpfApp应用程序
2.MainWindow.xaml文件代码如下:- <Window x:Class="WpfApp1.MainWindow"
- xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
- xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
- xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
- xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
- xmlns:local="clr-namespace:WpfApp1"
- mc:Ignorable="d"
- Title="MainWindow" Height="450" Width="800">
- <Grid>
- <Grid.RowDefinitions>
- <RowDefinition Height="*"></RowDefinition>
- <RowDefinition Height="10*" ></RowDefinition>
- </Grid.RowDefinitions>
-
- <Button Name="button" Grid.Row="0" HorizontalAlignment="Center" Content="generate_bitmap" MinWidth="120" MinHeight="30" Click="Button_Click"></Button>
- <Grid x:Name="imgGrid" Grid.Row="1">
- <Viewbox>
- <Image x:Name="img" Width="{Binding RelativeSource={RelativeSource Self}, Path=Source.PixelWidth}"
- Height="{Binding RelativeSource={RelativeSource Self}, Path=Source.PixelHeight}"
- Source="{Binding CtrlImage, IsAsync=True}"
- Stretch="None" />
- </Viewbox>
- </Grid>
- </Grid>
- </Window>
复制代码 3.MainWindow.xaml.cs文件代码如下:- using System;
- using System.Collections.Generic;
- using System.Globalization;
- using System.Linq;
- using System.Text;
- using System.Windows;
- using System.Windows.Controls;
- using System.Windows.Data;
- using System.Windows.Documents;
- using System.Windows.Input;
- using System.Windows.Media;
- using System.Windows.Media.Imaging;
- using System.Windows.Navigation;
- using System.Windows.Shapes;
- using System.Drawing;
- using System.Drawing.Drawing2D;
-
- namespace WpfApp1
- {
- /// <summary>
- /// Interaction logic for MainWindow.xaml
- /// </summary>
- public partial class MainWindow : Window
- {
- public MainWindow()
- {
- InitializeComponent();
- }
- public void Button_Click(object sender, RoutedEventArgs e)
- WriteableBitmap wb = new WriteableBitmap((int)imgGrid.ActualWidth, (int)imgGrid.ActualHeight, 96, 96, PixelFormats.Pbgra32, null);
- wb.Lock();
- Bitmap backBitmap = new Bitmap((int)imgGrid.ActualWidth, (int)imgGrid.ActualHeight, wb.BackBufferStride, System.Drawing.Imaging.PixelFormat.Format32bppArgb, wb.BackBuffer);
- Int32Rect rect = new Int32Rect(0, 0, (int)imgGrid.ActualWidth, (int)imgGrid.ActualHeight);
- byte[] pixels = new byte[(int)imgGrid.ActualWidth * (int)imgGrid.ActualHeight * wb.Format.BitsPerPixel / 8];
- Random rand = new Random();
- for (int y = 0; y < wb.PixelHeight; y++)
- {
- for (int x = 0; x < wb.PixelWidth; x++)
- {
- int alpha = 0;
- int red = 0;
- int green = 0;
- int blue = 0;
- if ((x % 5 == 0) || (y % 7 == 0))
- {
- red = (int)((double)y / wb.PixelHeight * 255);
- green = rand.Next(100, 255);
- blue = (int)((double)x / wb.PixelWidth * 255);
- alpha = 255;
- }
- else
- red = (int)((double)x / wb.PixelWidth * 255);
- blue = (int)((double)y / wb.PixelHeight * 255);
- alpha = 50;
- int pixeloffset = (x + y * wb.PixelWidth) * wb.Format.BitsPerPixel / 8;
- pixels[pixeloffset] = (byte)blue;
- pixels[pixeloffset + 1] = (byte)green;
- pixels[pixeloffset + 2] = (byte)red;
- pixels[pixeloffset + 3] = (byte)alpha;
- }
- int stride = (wb.PixelWidth * wb.Format.BitsPerPixel) / 8;
- wb.WritePixels(rect, pixels, stride, 0);
- }
- wb.Unlock();
- backBitmap.Dispose();
- backBitmap = null;
- img.Source = wb;
- }
- }
复制代码 效果如下:
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