winform 滚动条,winform 滚动条宽度

最新在做一个播放投屏的功能。

主要是播放投屏TXT内容，进行滚动播放。

下面先看下效果：

完成后效果图

过程1. 首先界面创建一个panel 一个rickbox

private System.Windows.Forms.RichTextBox richTextBox1; private System.Windows.Forms.Panel panel1;

设置panel1 的dock 为fill 设置panel在主窗体里。停靠在主窗体里。

this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;

设置richtexbox anchor 上、 左、右 注意这里不要设置dock 为fill

this.richTextBox1.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right)));

设置richtextbox的背景色和文字颜色：

this.richTextBox1.BackColor = System.Drawing.SystemColors.InfoText; this.richTextBox1.ForeColor = System.Drawing.Color.YellowGreen;

设置的ContentsResized 事件

private void richTextBox1_ContentsResized(object sender, ContentsResizedEventArgs e) { //根据不同情况也可以： if (!this.IsHandleCreated) { return; } this.richTextBox1.BeginInvoke(new Action(() => { richTextBox1.Height = e.NewRectangle.Height + 10; richTextBox1.Width = this.panel1.Width;//设置richTextBox1与外层panel1宽度一直 })); }

下面放一下全部代码：

form窗体：

namespace Z_Test { partial class Form8 { /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// Clean up any resources being used. /// </summary> /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form8)); this.richTextBox1 = new System.Windows.Forms.RichTextBox(); this.panel1 = new System.Windows.Forms.Panel(); this.panel1.SuspendLayout(); this.SuspendLayout(); // // richTextBox1 // this.richTextBox1.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right))); this.richTextBox1.BackColor = System.Drawing.SystemColors.InfoText; this.richTextBox1.ForeColor = System.Drawing.Color.YellowGreen; this.richTextBox1.Location = new System.Drawing.Point(3, 0); this.richTextBox1.Name = "richTextBox1"; this.richTextBox1.ScrollBars = System.Windows.Forms.RichTextBoxScrollBars.None; this.richTextBox1.Size = new System.Drawing.Size(1047, 188); this.richTextBox1.TabIndex = 2; this.richTextBox1.Text = resources.GetString("richTextBox1.Text"); this.richTextBox1.ContentsResized += new System.Windows.Forms.ContentsResizedEventHandler(this.richTextBox1_ContentsResized); // // panel1 // this.panel1.BackColor = System.Drawing.SystemColors.InactiveCaption; this.panel1.Controls.Add(this.richTextBox1); this.panel1.Dock = System.Windows.Forms.DockStyle.Fill; this.panel1.Location = new System.Drawing.Point(0, 0); this.panel1.Name = "panel1"; this.panel1.Size = new System.Drawing.Size(1053, 532); this.panel1.TabIndex = 4; // // Form8 // this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 15F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(1053, 532); this.Controls.Add(this.panel1); this.Name = "Form8"; this.Text = "Form8"; this.Load += new System.EventHandler(this.Form8_Load); this.Resize += new System.EventHandler(this.Form8_Resize); this.panel1.ResumeLayout(false); this.ResumeLayout(false); } #endregion private System.Windows.Forms.RichTextBox richTextBox1; private System.Windows.Forms.Panel panel1; } }

功能代码：

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.IO; using System.Linq; using System.Text; using System.Threading; using System.Threading.Tasks; using System.Windows.Forms; namespace Z_Test { public partial class Form8 : Form { public Form8() { InitializeComponent(); initData(); richTextBox1.Location = this.panel1.Location;//设置richTextBox1与外层panel1起始位置一致 // richTextBox1.Width = this.panel1.Width;//设置richTextBox1与外层panel1宽度一直 //richTextBox1.Height = 1500; //设置richTextBox1的高度，此处需要估算出完全展示完滚动内容的richTextBox1高度 System.Windows.Forms.Timer myTimer = new System.Windows.Forms.Timer();//创建定时器 myTimer.Interval = 50;//间隔时间是以毫秒为单位的 myTimer.Tag = richTextBox1;//该属性用于传递要移动的对象（此处可以不要） myTimer.Start();//启动定时器 myTimer.Tick += myTimerTest_Tick; } private void myTimerTest_Tick(object sender, EventArgs e) { richTextBox1.Top = richTextBox1.Top - 2;//向上移动2 if (richTextBox1.Bottom < 0) { richTextBox1.Top = this.Height; //当richTextBox1底部移动出panel1的上边沿时，保证richTextBox1从panel1下边沿出现 } } private void Form8_Load(object sender, EventArgs e) { } private void richTextBox1_ContentsResized(object sender, ContentsResizedEventArgs e) { //根据不同情况也可以： if (!this.IsHandleCreated) { return; } this.richTextBox1.BeginInvoke(new Action(() => { richTextBox1.Height = e.NewRectangle.Height + 10; richTextBox1.Width = this.panel1.Width;//设置richTextBox1与外层panel1宽度一直 })); } private void initData() { string txtContent = File.ReadAllText(@"D:\Desktop\资本论.txt"); this.richTextBox1.Text = txtContent; } private void Form8_Resize(object sender, EventArgs e) { //根据不同情况也可以： if (!this.IsHandleCreated) { return; } this.richTextBox1.BeginInvoke(new Action(()=> { richTextBox1.Width = this.panel1.Width;//设置richTextBox1与外层panel1宽度一直 richTextBox1.Refresh(); })); } } }

这里测试使用的Txt大小为4M。