Go homepage(回首页) Upload pictures (上传图片) Write articles (发文字帖)
The author:(作者)qqpublished in(发表于) 2014/7/11 9:16:45 c#中GDI+图形图像:GDI+中的画笔使用方法
c#中GDI+图形图像:GDI+中的画笔使用方法|实例
GDI+中的画笔闭合的形状(例如,矩形或椭圆)由轮廓和内部组成。用钢笔绘制出轮廓,并用画笔填充其内部。GDI+提供了几种填充闭合形状内部的画笔类:SolidBrush、HatchBrush、TextureBrush、LinearGradientBrush和PathGradientBrush。所有这些类都是从Brush类继承的。1.实心画笔使用实心画笔时,需要使用SolidBrush类,该类主要用来使用定义的单色画笔填充图形形状,如矩形、椭圆、扇形、多边形和封闭路径等。示例实心画笔的使用本示例中,当程序运行时,单击【实心画笔】按钮,在窗体中绘制一个使用指定颜色填充的椭圆。示例运行结果如图1所示。图1 实心画笔的使用Form1窗体中,在【实心画笔】按钮的Click事件中分别声明Graphics类和SolidBrush类的两个实例对象,调用Graphics对象的FillEllipse方法在窗体中绘制一个使用指定颜色填充的椭圆。【实心画笔】按钮的Click事件代码如下:private void button1_Click(object sender, EventArgs e){Graphics graphics = this.CreateGraphics();SolidBrush mySolidBrush = new SolidBrush(Color.Green);graphics.FillEllipse(mySolidBrush, 70, 20, 100, 50);}完整程序代码如下:★ ★★★★Form1.cs窗体代码文件完整程序代码★★★★★using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace _6_09{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){Graphics graphics = this.CreateGraphics();SolidBrush mySolidBrush = new SolidBrush(Color.Green);graphics.FillEllipse(mySolidBrush, 70, 20, 100, 50);}}}★ ★★★★Form1..Designer.cs窗体代码文件完整程序代码★★★★★namespace _6_09{partial class Form1{/// /// 必需的设计器变量。/// private System.ComponentModel.IContainer components = null;/// /// 清理所有正在使用的资源。/// /// 如果应释放托管资源,为 true;否则为 false。protected override void Dispose(bool disposing){if (disposing && (components != null)){components.Dispose();}base.Dispose(disposing);}#region Windows 窗体设计器生成的代码/// /// 设计器支持所需的方法 - 不要/// 使用代码编辑器修改此方法的内容。/// private void InitializeComponent(){this.button1 = new System.Windows.Forms.Button();this.SuspendLayout();//// button1//this.button1.Location = new System.Drawing.Point(82, 83);this.button1.Name = "button1";this.button1.Size = new System.Drawing.Size(75, 23);this.button1.TabIndex = 0;this.button1.Text = "实心画笔";this.button1.UseVisualStyleBackColor = true;this.button1.Click += new System.EventHandler(this.button1_Click);//// Form1//this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;this.ClientSize = new System.Drawing.Size(238, 130);this.Controls.Add(this.button1);this.MaximizeBox = false;this.Name = "Form1";this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;this.Text = "Form1";this.ResumeLayout(false);}#endregionprivate System.Windows.Forms.Button button1;}}★ ★★★★Program.cs主程序文件完整程序代码★★★★★using System;using System.Collections.Generic;using System.Windows.Forms;namespace _6_09{static class Program{/// /// 应用程序的主入口点。/// [STAThread]static void Main(){Application.EnableVisualStyles();Application.SetCompatibleTextRenderingDefault(false);Application.Run(new Form1());}}}2.阴影画笔使用阴影画笔时,需要使用HatchBrush类,该类位于System.Drawing.Drawing2D命名空间内,它主要使用阴影样式、前景色和背景色定义矩形画笔。
赞