C#实现QQ(高仿版)聊天窗口

大家好，又见面了，我是你们的朋友全栈君。

一.编程思想

(1).考虑聊天功能的实现,文本的获取以及显示;
(2).窗体制作时需要的控件;
(3).考虑是否可以发送空格以及空字符;
(4).刚开始进入界面时焦点的位置;
(5).获取输入内容鼠标光标跟踪最后一个字符处;
(6).窗口抖动依赖位置的变化进行实现;
(6).点击按钮对应的触发事件;

二.代码的实现

1.需要的控件简介:

TextBox:允许用户输入文本,并提供多行编辑和密码字符掩码功能;

Button:当用户单击它时引发事件;

Timer:按用户定义的间隔引发事件的组件

2.窗体加载时完成事件

        private void 聊天窗口_Load(object sender, EventArgs e)
        { 
   
            //设置窗体在桌面的位置
            this.Left = Screen.PrimaryScreen.Bounds.Width / 2 - this.Width / 2;
            this.Top = Screen.PrimaryScreen.Bounds.Height / 2 - this.Height / 2;
            textBox1.BackColor = Color.SkyBlue;//设置textbox1的颜色
            textBox2.BackColor = Color.GreenYellow;//设置textbox2的颜色
            this.BackColor = Color.Black;//设置窗体的颜色
            //设置按钮的文本
            button1.Text = "发送";
            button2.Text = "抖动";
            button3.Text = "关闭";
            textBox1.ReadOnly = true;//设置输出为仅读
            this.Opacity = 0.4;//设置不透明度
        }

3.点击发送按钮时的代码,要设置不能发送空内容,并且获取焦点,设置发送时显示的发送人以及当前时间和输入的内容

 private void button1_Click(object sender, EventArgs e)
        { 
   
            //设置文本内容不为空字符以及不能为空格
            if (textBox2.Text.Trim() == "")//移除所有空白前导字符以及尾部字符
            { 
   
                this.textBox2.Text = "";//设置为空
                this.textBox2.Focus();//获取焦点
                MessageBox.Show("发送内容不能为空,请至少包含一个字符!");
            }
            //第二种方法
            //if (string.IsNullOrWhiteSpace(textBox2.Text))//指示指定的字符串是null,空还是仅有空白字符组成
            //{ 
   
            // this.textBox2.Text = "";
            // this.textBox2.Focus();
            // MessageBox.Show("发送内容不能为空,请至少包含一个字符!");
            //}
            else { 
   
                //获取textbox2内容在textbox1显示
                textBox1.Text +="\r\n" + "{借愁哥哥(1848514604)}" + DateTime.Now + "\r\n" + "\r\n" + textBox2.Text + "\r\n";//设置发送时显示的发送人以及当前时间和输入的内容
                textBox2.Text = "";
                this.textBox2.Focus();//为textbox2设置焦点
            }
        }

4.设置窗体的抖动

 private void button2_Click(object sender, EventArgs e)
        { 
   
           int x= this.Left;
           int y= this.Top;
            //第一种方法timer解决
            //for (int i = 0; i < 10; i++)
            //{ 
   
            // this.Location = new Point(x,y);
            // this.Location = new Point(x-5,y);
            // this.Location = new Point(x-5,y-5);
            // this.Location = new Point(x,y-5);
            // this.Location = new Point(x+5,y-5);
            // this.Location = new Point(x+5,y);
            // this.Location = new Point(x+5,y+5);
            // this.Location = new Point(x,y+5);
            // this.Location = new Point(x-5,y+5);
            // this.Location = new Point(x-5,y);
            // this.Location = new Point(x,y);
            //}
            //第二种方法之4个点
            //for (int i = 0; i < 10; i++)
            //{ 
   
            // this.Location = new Point(x+10,y);
            // Thread.Sleep(100);
            // this.Location = new Point(x+10,y+10);
            // Thread.Sleep(100);
            // this.Location=new Point(x,y+10);
            // Thread.Sleep(100);
            // this.Location = new Point(x, y);
            // Thread.Sleep(100);
            //}
            //第二种方法之9个点
            for (int i = 0; i < 10; i++)
            { 
   
                this.Location = new Point(x,y);
                Thread.Sleep(10);
                this.Location = new Point(x+10, y);
                Thread.Sleep(10);
                this.Location = new Point(x+10, y+10);
                Thread.Sleep(10);
                this.Location = new Point(x, y+10);
                Thread.Sleep(10);
                this.Location = new Point(x-10, y+10);
                Thread.Sleep(10);
                this.Location = new Point(x-10, y);
                Thread.Sleep(10);
                this.Location = new Point(x-10, y-10);
                Thread.Sleep(10);
                this.Location = new Point(x, y-10);
                Thread.Sleep(10);
                this.Location = new Point(x+10, y-10);
                Thread.Sleep(10);
                this.Location = new Point(x+10, y);
                Thread.Sleep(10);
                this.Location = new Point(x, y);
                Thread.Sleep(10);
            }
            textBox1.Text+= "\r\n" + "{借愁哥哥(1848514604)}" + DateTime.Now + "\r\n" + "\r\n" + "对方向您发送了一条抖动消息" + "\r\n";
            textBox2.Focus();//获取焦点
        }

5.关闭按钮的设计

 private void button3_Click(object sender, EventArgs e)
        { 
   
            
            this.Close();//关闭此窗体
        }

6.textbox1的设计

 private void textBox1_TextChanged_1(object sender, EventArgs e)
        { 
   
            //设置光标定位
            this.textBox1.Focus();//为控件设置焦点
            this.textBox1.Select(this.textBox1.TextLength, 0);//选择文本框中的文本范围,textlength为获取控件中文本长度
            this.textBox1.ScrollToCaret();//将控件内容滚动到当前插入符号位置
        }

6.textbox2的设计

 private void textBox2_TextChanged_1(object sender, EventArgs e)
        { 
   
            //设置textbox颜色
            Random n = new Random();
            textBox2.ForeColor = Color.FromArgb(n.Next(0, 255), n.Next(0, 255), n.Next(0, 255));
            //textBox1.BackColor = textBox2.ForeColor;
            this.Text = "正在输入...";
        }