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最新推荐文章于 2022-04-25 17:08:44 发布

原创最新推荐文章于 2022-04-25 17:08:44 发布 · 708 阅读

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#c# #button #border #object #class

本文介绍了一个C# Windows窗体应用程序中如何使用MouseMove事件来控制按钮的位置，并利用Graphics对象和LinearGradientBrush类实现背景的渐变填充。通过对MouseMove事件的监听调整按钮位置，以及Form1_Paint事件中利用线性渐变画刷为窗体绘制背景。

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private void Form1_MouseMove(object sender, MouseEventArgs e) { int border = 50; int x = e.X; int y = e.Y; int left = button1.Left; int right = button1.Right; int top = button1.Top; int bottom = button1.Bottom; if (x > left - border && x < right + border && y > top - border && y < bottom + border) { button1.Top += (y > top ? -20 : 20); if (button1.Top >Form1.ActiveForm.Size.Height || button1.Bottom < 0) { button1 .Top =Form1 .ActiveForm .Size .Height /2; } button1.Left += (x > left ? -20 : 20); if (button1.Left > Form1.ActiveForm.Size.Width || button1.Right < 0) { button1.Left = Form1.ActiveForm.Size.Width / 2; } } 绘制背景 using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Drawing.Drawing2D; namespace WindowsFormsApplication31 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Paint(object sender, PaintEventArgs e) { Graphics g = e.Graphics; Color fcolor = Color.Yellow; Color tcolor = Color.Red; Brush b = new LinearGradientBrush(this.ClientRectangle, fcolor, tcolor, LinearGradientMode.ForwardDiagonal); g.FillRectangle(b, this.ClientRectangle ); } private void Form1_Resize(object sender, EventArgs e) { this.Invalidate(); } } } 中的lineargradientbrush方法的使用