随机数产生器

最近在学习C# 自己没事做的关于随机数和winform的练习 附上代码

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace EATRANDOM
{
    public partial class Form1 : Form
    {

        int num_min, num_max,num_fina,num_fm2,num_sum;
        public Form1()
        {
            InitializeComponent();

            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
        }

        public void num_j() {
            num_fm2--;
        }


        private void button1_Click(object sender, EventArgs e)
        {
            int start,end;//定义两个变量用于接收tryparese的返回值
            
            if(!(int.TryParse(textBox1.Text,out start))){//判断文本框里输入的是否是数字和为空

                MessageBox.Show("您输入的下限有误，请重新输入！");
                textBox1.Focus();
                textBox1.SelectAll();
                return;
            }

            if (!(int.TryParse(textBox2.Text, out end)))
            {

                MessageBox.Show("您输入的上限有误，请重新输入！");
                textBox2.Focus();
                textBox2.SelectAll();
                return;
            } if (start>end)
            {

                MessageBox.Show("您输入的下限应该小于上限，请重新输入！");
                textBox1.Focus();
                textBox1.SelectAll();
                return;
            }
            num_min = int.Parse(textBox1.Text);//提取文本框的内容转换为int型
            num_max = int.Parse(textBox2.Text)+1;
            Random rd = new Random();//创建随机数
            num_fina = rd.Next(num_min, num_max);
            textBox3.Text = num_fina.ToString();//显示内容，注意转换成字符串，否则无法显示
        }

        private void label4_Click(object sender, EventArgs e)//程序退出
        {
            Application.Exit();
        }

        private void textBox1_KeyPress(object sender, KeyPressEventArgs e)//阻止文本框输入除数字和退格键以外的任意字符
        {
            if(e.KeyChar<48||e.KeyChar>57){
                e.Handled = true;//表示不能输入
            }if(e.KeyChar==8){//退格键可以输入
                e.Handled = false;
            }if(textBox1.SelectionStart==0 && e.KeyChar=='0'){
                e.Handled = true;
            }
        }

        private void textBox2_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar < 48 || e.KeyChar > 57)
            {
                e.Handled = true;
            } if (e.KeyChar == 8)
            {
                e.Handled = false;
            } if (textBox1.SelectionStart == 0 && e.KeyChar == '0')
            {
                e.Handled = true;
            }
        }
        private void textBox4_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar < 48 || e.KeyChar > 57)
            {
                e.Handled = true;
            } if (e.KeyChar == 8)
            {
                e.Handled = false;
            } if (textBox1.SelectionStart == 0 && e.KeyChar == '0')
            {
                e.Handled = true;
            }
        }
        private void textBox4_Enter(object sender, EventArgs e)
        {
            int result;
            if (!(int.TryParse(textBox4.Text, out result)))
            {
                textBox4.Text = "";
                return;
            }
           
        }

        private void btn2_Click(object sender, EventArgs e)
        {
            int start, end, result;

            if (!(int.TryParse(textBox1.Text, out start)))
            {

                MessageBox.Show("您输入的下限有误，请重新输入！");
                textBox1.Focus();
                textBox1.SelectAll();
                return;
            }

            if (!(int.TryParse(textBox2.Text, out end)))
            {

                MessageBox.Show("您输入的上限有误，请重新输入！");
                textBox2.Focus();
                textBox2.SelectAll();
                return;
            } if (start > end)
            {

                MessageBox.Show("您输入的下限应该小于上限，请重新输入！");
                textBox1.Focus();
                textBox1.SelectAll();
                return;
            } if (num_fm2 >= 5) {

                MessageBox.Show("请不要同时生成太多随机数据表以免死机！！");
            } if (!(int.TryParse(textBox4.Text, out result)))
            {

                MessageBox.Show("您输入的数量有误，请重新输入！");
                textBox4.Focus();
                textBox4.SelectAll();
                return;
            }




            num_min = int.Parse(textBox1.Text);
            num_max = int.Parse(textBox2.Text) + 1;
            num_sum = int.Parse(textBox4.Text);
            num_fm2++;
            Form2 fm = new Form2(num_min,num_max,num_sum);
            fm.Owner = this;
            fm.Show();


        }

      

        


    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace EATRANDOM
{
    public partial class Form2 : Form
    {

        bool beginMove = false;
        int currentXPosition = 0;
        int currentYPosition = 0; 
        
        public Form2(int min,int max,int length)
        {
            InitializeComponent();
            //this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
               Random rd = new Random();

            for(int i=0;i<length;i++){//循环在textbox中出插入数据
                
                int num = rd.Next(min, max);
                textBox1.Text += num.ToString() +"\r\n";
            
            }



        }

        private void label2_Click(object sender, EventArgs e)
        {
            this.DestroyHandle();//销毁本窗体程序，不能再用Application.Exit();全程序退出了，关于只退出子窗体的方法自己也不是很清楚，有更好的方法麻烦留个言告诉我一声
            Form1 frm1;
            frm1 = (Form1) this.Owner;
            frm1.num_j();
            this.Hide();
            
            
        }

//一下是在取消窗体样式的情况下移动窗体（即没有标题栏最小化，关闭等的时候移动）
        private void Form2_MouseMove(object sender, MouseEventArgs e)
        {
            if (beginMove)
            {
                this.Left +=MousePosition.X - currentXPosition;
                this.Top += MousePosition.Y - currentYPosition;
                currentXPosition = MousePosition.X;
                currentYPosition = MousePosition.Y;
            } 
        }

        private void Form2_MouseDown(object sender, MouseEventArgs e)
        {
            beginMove = true;
            currentXPosition = MousePosition.X;
            currentYPosition = MousePosition.Y; 
        }

        private void Form2_MouseUp(object sender, MouseEventArgs e)
        {
            beginMove = false; 
        }


    }
}

 

效果图两张

 源码下载：http://pan.baidu.com/share/link?shareid=1219268688&uk=104008118

转载于:https://www.cnblogs.com/yehenchen/p/3311798.html