C# 自定义控件(二) 新闻控件的优化

在上一篇文章中，我完成了一个简单新闻控件，后来决定美化下，让鼠标放上去的时候可以有颜色变化。

代码修改为下：

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace ClientControl{ public delegate void NewsClickEventHandle(object sender,NewsEventArg args); public partial class NewsStage : Control { public event NewsClickEventHandle NewsClicked; private Graphics g; private bool isMouseOn = false; public NewsStage() { InitializeComponent(); this.Click += new EventHandler(NewsStage_Click); this.MouseMove += new MouseEventHandler(NewsStage_MouseMove); this.MouseLeave += new EventHandler(NewsStage_MouseLeave); } void NewsStage_MouseLeave(object sender, EventArgs e) { isMouseOn = false; this.Invalidate(); } void NewsStage_MouseMove(object sender, MouseEventArgs e) { isMouseOn = true; this.Invalidate(); } //新闻被点击 void NewsStage_Click(object sender, EventArgs e) { if (_NewsID>=0&&_NewsTitle!="") { NewsEventArg myArgs = new NewsEventArg(_NewsID,_NewsTitle); NewsClicked(this, myArgs); } } private int _NewsID = 0; [Description("新闻ID"), Category("Appearance")] public int NewsID { get { return _NewsID; } set { _NewsID = value; this.Invalidate(); } } /// <summary> /// 新闻标题 /// </summary> private string _NewsTitle = ""; [Description("新闻标题"), Category("Appearance")] public string NewsTitle { get { return _NewsTitle; } set { _NewsTitle = value; this.Invalidate(); } } private Color _MouseOnColor = new Color(); [Description("鼠标划上的样色"), Category("Appearance")] public Color MouseOnColor { get { return _MouseOnColor; } set { _MouseOnColor = value; } } protected override void OnPaint(PaintEventArgs pe) { base.OnPaint(pe); g = this.CreateGraphics(); if (isMouseOn) { g.DrawString(_NewsTitle, this.Font, new SolidBrush(this._MouseOnColor), new PointF(0, 0)); } else { g.DrawString(_NewsTitle, this.Font, new SolidBrush(this.ForeColor), new PointF(0, 0)); } } protected void Dispose() { g.Dispose(); } } public partial class NewsEventArg : EventArgs { public int NewsID = 0; public string NewsTitle = ""; public NewsEventArg(int newsID,string newsTitle){ NewsID = newsID; NewsTitle = newsTitle; } }}