在RichTextBox动态显示一些文本信息时,需要一些设置,显示当前要显示的字符串。
一个RichTextBox,一个按钮。下图为运行时显示过程中。
Form1.cs:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace RichTextBoxScroll
{
public partial class Form1 : Form
{
private delegate void delInfoList(string text);
public Form1()
{
InitializeComponent();
}
private void SetrichTextBox(string value)
{
if (richTextBox1.InvokeRequired)//其它线程调用
{
delInfoList d = new delInfoList(SetrichTextBox);
richTextBox1.Invoke(d, value);
}
else//本线程调用
{
if (richTextBox1.Lines.Length > 100)
{
richTextBox1.Clear();
}
richTextBox1.Focus(); //让文本框获取焦点
richTextBox1.Select(richTextBox1.TextLength, 0);//设置光标的位置到文本尾
richTextBox1.ScrollToCaret();//滚动到控件光标处
richTextBox1.AppendText(value);//添加内容
}
}
private void button1_Click(object sender, EventArgs e)
{
for (int i = 0; i < 300; i++)
{
SetrichTextBox(DateTime.Now.ToString() + " 内容滚动打印中!!!\n");
}
}
}
}
Form1.Designer.cs:
namespace RichTextBoxScroll { partial class Form1 { /// <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() { this.panel1 = new System.Windows.Forms.Panel(); this.button1 = new System.Windows.Forms.Button(); this.richTextBox1 = new System.Windows.Forms.RichTextBox(); this.panel1.SuspendLayout(); this.SuspendLayout(); // // panel1 // this.panel1.Controls.Add(this.button1); 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(706, 496); this.panel1.TabIndex = 0; // // button1 // this.button1.Location = new System.Drawing.Point(609, 85); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(75, 23); this.button1.TabIndex = 1; this.button1.Text = "开始测试"; this.button1.UseVisualStyleBackColor = true; this.button1.Click += new System.EventHandler(this.button1_Click); // // richTextBox1 // this.richTextBox1.Dock = System.Windows.Forms.DockStyle.Fill; this.richTextBox1.Font = new System.Drawing.Font("SimSun", 21.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.richTextBox1.Location = new System.Drawing.Point(0, 0); this.richTextBox1.Name = "richTextBox1"; this.richTextBox1.Size = new System.Drawing.Size(706, 496); this.richTextBox1.TabIndex = 0; this.richTextBox1.Text = ""; // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(706, 496); this.Controls.Add(this.panel1); this.Name = "Form1"; this.Text = "滚动打印测试"; this.panel1.ResumeLayout(false); this.ResumeLayout(false); } #endregion private System.Windows.Forms.Panel panel1; private System.Windows.Forms.RichTextBox richTextBox1; private System.Windows.Forms.Button button1; } }