C#实现QQ聊天窗口

系统管理员 2023-07-24 13:22 15阅读 0赞

**分析**

*  需要两个TextBox,一个用于显示消息,一个用于编辑消息
 *  需要四个按钮,分别控制关闭程序,清空正在编辑的消息,发送消息,抖动

**原理**

1.  在TextBox2中编辑消息并发送,在TextBox1中显示所发送的消息的同时使TextBox2中的消息清空
2.  发送的第一条消息TextBox1先保存并显示,发送第二条消息时将TextBox1事先的消息先打印出来接着显示第二条消息
3.  抖动原理:使窗口的left以及top发生变化(围绕窗体左上角为坐标原点考虑)加上Thread线程和for循环从而实现窗口抖动效果

**程序中用到的重要属性**

ReadOnly属性:设置文本为只读(true)`textBox1.ReadOnly=true;`

TabIndex属性:设置光标默认出现在哪里(0)`textBox1.TabIndex=0;`

Multiline属性:设置文本框可多行输入`textBox1.Multiline=true;`

Datetime:获取当前时间

“\\r\\n” 换行

AcceptButton属性:获取或设置当用户按Enter键时所单击的窗体上的按钮`this.AcceptButton = button2;`

Thread类:创建和控制线程`Thread.Sleep(10);//设置执行完上一步停留时间` 还需要创建命名空间`using System.Threading;`  
Trim方法:`textBox2.Text.Trim()=="")//Trim:移除当前textBox2对象位置前后的空白字符`

**具体代码如下:**

using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Forms;
    using System.Threading;//设置多线程
    
    namespace Test_QQ_chat_windows
    {
        
        public partial class Form1 : Form
        {
        
            public Form1()
            {
        
                InitializeComponent();
            }
    
            private void Form1_Load(object sender, EventArgs e)
            {
         
                //设置聊天窗口居中
                this.Left = Screen.PrimaryScreen.WorkingArea.Width / 2 - this.Width / 2;
                this.Top = Screen.PrimaryScreen.WorkingArea.Height / 2 - this.Height / 2;
                //聊天窗口命名
                this.Text = "和Know正在聊天";
                this.BackgroundImage = Image.FromFile("../../img/timg.jpg");//设置窗体背景图
                this.BackgroundImageLayout = ImageLayout.Stretch;//设置窗体背景图拉伸
                //textBox1设置只读
                textBox1.ReadOnly = true;
                //设置发送按钮可以用Enter键来触发
                this.AcceptButton = button2;
                this.Opacity = 0.8;//设置窗体透明度为0.2
                textBox1.BackColor = Color.DeepSkyBlue;
                textBox2.BackColor = Color.DeepPink;
            }
    
            private void button1_Click(object sender, EventArgs e)
            {
        
                this.BackColor = Color.DeepSkyBlue;//设置窗体背景颜色
                textBox1.Text += "深夜食堂(36522224)" + DateTime.Now + "\r\n"+ "\r\n" + "您发送了一个窗口抖动" + "\r\n"+"\r\n";
                textBox2.Text = "";//设置发送内容后textBox2中无内容
                //窗口抖动
                int x = this.Left;
                int y = this.Top;
                for (int i = 0; i <= 3; i++)//设置抖动次数
                {
        
                    this.Location = new Point(x - 3, y);
                    Thread.Sleep(10);//设置执行完上一步停留时间
                    this.Location = new Point(x - 3, y - 3);
                    Thread.Sleep(10);
                    this.Location = new Point(x, y - 3);
                    Thread.Sleep(10);
                    this.Location = new Point(x + 3, y - 3);
                    Thread.Sleep(10);
                    this.Location = new Point(x + 3, y);
                    Thread.Sleep(10);
                    this.Location = new Point(x + 3, y + 3);
                    Thread.Sleep(10);
                    this.Location = new Point(x, y + 3);
                    Thread.Sleep(10);
                    this.Location = new Point(x - 3, y + 3);
                    Thread.Sleep(10);
                    this.Location = new Point(x - 3, y);
                    Thread.Sleep(10);
                    this.Location = new Point(x, y);
                }
            }
    
            private void button2_Click(object sender, EventArgs e)
            {
        
                //消息发送
                //判断textbox2中有无内容
                if (textBox2.Text == ""||textBox2.Text.Trim()=="")//Trim:移除当前textBox2对象位置前后的空白字符)
                {
        
                   MessageBox.Show("输入不能为空值,请重新输入", "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
                else
                {
        
                	 textBox1.Text += "深夜食堂(36522224)" + DateTime.Now + "\r\n" + "\r\n" + textBox2.Text + "\r\n"+ "\r\n";
                    textBox2.Text = "";//设置发送内容后textBox2中无内容
                }
            }
    
            private void button3_Click(object sender, EventArgs e)
            {
        
                this.Close();
            }
    
            private void button4_Click(object sender, EventArgs e)
            {
        
                textBox2.Text = "";
            }
    
            private void textBox1_TextChanged(object sender, EventArgs e)
            {
        
                //设置起始点在最后消息处
                this.textBox1.SelectionStart = this.textBox1.Text.Length;
                //内容滚动到最后消息处
                this.textBox1.ScrollToCaret();
            }
        }
    }

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