简单扩展winform中的ListBox，实现项闪烁、项变色，和代码拉动滚动条

共50个文件

pdb：10个

cs：9个

dll：8个

ListBox

代码拉动

3星 · 超过75%的资源需积分: 42 54 浏览量 2012-08-05 12:06:44 上传评论收藏 114KB RAR 举报

在Windows Forms开发中，ListBox控件是常用的组件之一，用于展示列表数据。然而，标准的ListBox控件功能相对有限，不支持一些高级效果，如项闪烁、项变色以及通过代码来控制滚动条。本教程将详细介绍如何通过扩展ListBox控件来实现这些增强功能。我们创建一个自定义的ListBox类，继承自System.Windows.Forms.ListBox，以便添加新的特性。这个自定义类可以命名为`ListColorfulBox`，与提供的压缩包文件名相同。 1. **项闪烁**：要实现项闪烁，我们可以利用定时器（Timer）组件，当定时器触发时，改变选中项的背景颜色，然后在下一次触发时恢复原色。以下是一个简单的实现： ```csharp private Timer timer; private int flashIndex; public ListColorfulBox() { InitializeComponent(); timer = new Timer(); timer.Interval = 500; // 设置闪烁间隔时间 timer.Tick += Timer_Tick; } private void Timer_Tick(object sender, EventArgs e) { if (flashIndex >= Items.Count) // 如果超过了最后一个项，则停止闪烁 timer.Stop(); else { SetItemColor(flashIndex, !GetItemColor(flashIndex)); // 切换项颜色 flashIndex++; } } private bool GetItemColor(int index) { // 获取项颜色，这里可以保存颜色状态或根据规则判断 return true; // 假设默认为亮色，闪烁时变为暗色 } private void SetItemColor(int index, bool isFlash) { // 设置项颜色，可以根据isFlash切换颜色 DrawItemEventArgs args = new DrawItemEventArgs(DrawItemState.Focused, Font, new Rectangle(0, index * Height / Items.Count, Width, Height / Items.Count), index, DrawItemState.None); if (isFlash) args.Graphics.FillRectangle(Brushes.Gray, args.Bounds); else args.Graphics.FillRectangle(Brushes.White, args.Bounds); DrawItem(args); // 重新绘制项 } // 当设置闪烁项时调用 public void StartFlash(int itemIndex) { timer.Start(); flashIndex = itemIndex; } ``` 2. **项变色**：项变色可以根据项的数据或者条件来动态改变颜色。我们可以在`DrawItem`事件中实现这一功能： ```csharp protected override void OnDrawItem(DrawItemEventArgs e) { if ((e.State & DrawItemState.Selected) == DrawItemState.Selected) { e.Graphics.FillRectangle(Brushes.LightGray, e.Bounds); } else { if (/* 根据项的数据或条件判断是否需要变色 */) e.Graphics.FillRectangle(Brushes.Yellow, e.Bounds); else e.Graphics.FillRectangle(Brushes.White, e.Bounds); } // 绘制文本 string text = Items[e.Index].ToString(); SolidBrush brush = new SolidBrush(e.ForeColor); e.Graphics.DrawString(text, Font, brush, e.Bounds.X + 2, e.Bounds.Y + 2); } ``` 3. **代码拉动滚动条**：控制滚动条可以通过修改ListBox的`TopIndex`属性实现。`TopIndex`表示可见项的起始索引，通过增加或减少它的值，可以实现向上或向下滑动的效果。 ```csharp public void ScrollUp() { if (TopIndex > 0) TopIndex--; } public void ScrollDown() { if (TopIndex < Items.Count - VisibleCount) TopIndex++; } ``` 以上代码示例展示了如何扩展ListBox以实现闪烁、变色和代码控制滚动条的功能。在实际应用中，你可以根据项目需求进行调整和优化。例如，对于项变色，你可以根据数据模型的某个属性来决定颜色；对于闪烁，可能需要添加更多的控制逻辑，如闪烁次数限制、闪烁速度调节等。而代码控制滚动条则适用于自动化测试或某些特定交互场景。

资源推荐

资源详情

资源评论

收起资源包目录

ListColorfulBox.rar （50个子文件）

ListColorfulBox

ListBoxItem.cs 1KB

Properties

AssemblyInfo.cs 1KB

ExListBox.cs 6KB

obj

ListColorfulBox.csproj.FileListAbsolute.txt 1KB

Debug

Refactor

ListColorBox.dll 16KB

ListColorBox.dll 20KB

TempPE

ListColorfulBox.pdb 22KB

ListColorfulBox.dll 20KB

ListColorBox.pdb 24KB

ListColorBox.csproj.FileListAbsolute.txt 764B

bin

Debug

ListColorBox.dll 20KB

ListColorfulBox.pdb 22KB

ListColorfulBox.dll 20KB

ListColorBox.pdb 24KB

ListColorfulBox.csproj 2KB

ListColorfulBoxDemo.sln 1KB

ListColorfulBoxDemo.suo 30KB

ListColorfulBoxDemo1

Form1.cs 2KB

Program.cs 479B

Form1.resx 6KB

Properties

Settings.settings 249B

Resources.Designer.cs 3KB

AssemblyInfo.cs 1KB

Settings.Designer.cs 1KB

Resources.resx 5KB

Form1.Designer.cs 6KB

obj

Debug

ListColorfulBoxDemo.csproj.GenerateResource.Cache 842B

Refactor

ResolveAssemblyReference.cache 8KB

ListColorfulBox.Demo.Form1.resources 180B

ListColorfulBox.Demo.pdb 32KB

TempPE

Properties.Resources.Designer.cs.dll 5KB

ListBoxUserChangeColorDemo1.csproj.GenerateResource.Cache 842B

ListBoxUserChangeColorDemo1.pdb 28KB

ListColorfulBox.Demo.Properties.Resources.resources 180B

ListBoxUserChangeColorDemo1.exe 24KB

ListBoxUserChangeColorDemo1.Properties.Resources.resources 180B

ListBoxUserChangeColorDemo1.Form1.resources 180B

ListColorfulBox.Demo.exe 24KB

ListColorfulBoxDemo.csproj.FileListAbsolute.txt 3KB

ListBoxUserChangeColorDemo1.csproj.FileListAbsolute.txt 2KB

ListColorfulBoxDemo.csproj 3KB

bin

Debug

ListColorfulBox.Demo.pdb 32KB

ListColorBox.dll 20KB

ListColorfulBox.pdb 22KB

ListColorfulBox.dll 20KB

ListBoxUserChangeColorDemo1.pdb 28KB

ListBoxUserChangeColorDemo1.exe 24KB

ListColorBox.pdb 24KB

ListColorfulBox.Demo.vshost.exe 6KB

ListColorfulBox.Demo.exe 24KB

C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListBoxUserChangeColorDemo1\ListBoxUserChangeColorDemo1\obj\Debug\ResolveAssemblyReference.cache C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListBoxUserChangeColorDemo1\ListBoxUserChangeColorDemo1\obj\Debug\ListColorfulBox.Demo.Form1.resources C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListBoxUserChangeColorDemo1\ListBoxUserChangeColorDemo1\obj\Debug\ListColorfulBox.Demo.Properties.Resources.resources C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListBoxUserChangeColorDemo1\ListBoxUserChangeColorDemo1\obj\Debug\ListColorfulBoxDemo.csproj.GenerateResource.Cache C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListBoxUserChangeColorDemo1\ListBoxUserChangeColorDemo1\bin\Debug\ListColorfulBox.Demo.exe C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListBoxUserChangeColorDemo1\ListBoxUserChangeColorDemo1\bin\Debug\ListColorfulBox.Demo.pdb C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListBoxUserChangeColorDemo1\ListBoxUserChangeColorDemo1\bin\Debug\ListColorfulBox.dll C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListBoxUserChangeColorDemo1\ListBoxUserChangeColorDemo1\bin\Debug\ListColorfulBox.pdb C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListBoxUserChangeColorDemo1\ListBoxUserChangeColorDemo1\obj\Debug\ListColorfulBox.Demo.exe C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListBoxUserChangeColorDemo1\ListBoxUserChangeColorDemo1\obj\Debug\ListColorfulBox.Demo.pdb C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListColorfulBox\ListColorfulBoxDemo1\obj\Debug\ListColorfulBox.Demo.exe C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListColorfulBox\ListColorfulBoxDemo1\obj\Debug\ListColorfulBox.Demo.pdb C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListColorfulBox\ListColorfulBoxDemo1\bin\Debug\ListColorfulBox.Demo.exe C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListColorfulBox\ListColorfulBoxDemo1\bin\Debug\ListColorfulBox.Demo.pdb C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListColorfulBox\ListColorfulBoxDemo1\bin\Debug\ListColorfulBox.dll C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListColorfulBox\ListColorfulBoxDemo1\bin\Debug\ListColorfulBox.pdb C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListColorfulBox\ListColorfulBoxDemo1\obj\Debug\ResolveAssemblyReference.cache C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListColorfulBox\ListColorfulBoxDemo1\obj\Debug\ListColorfulBox.Demo.Form1.resources C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListColorfulBox\ListColorfulBoxDemo1\obj\Debug\ListColorfulBox.Demo.Properties.Resources.resources C:\Documents and Settings\Administrator\My Documents\Visual Studio 2005\Projects\ListColorfulBox\ListColorfulBoxDemo1\obj\Debug\ListColorfulBoxDemo.csproj.GenerateResource.Cache

评论收藏

内容反馈