c#第二次作业 随机显示图片

“随机图片显示器”开发，并记录自程序运行后每张图片已经显示的次数，把次数保存到文本文件中

                                                                       Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace tupian1
{
    static class Program
    {
        /// 

        /// 应用程序的主入口点。
        /// 
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}

 Form1.cs

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.IO;
namespace tupian1
{
    public partial class Form1 : Form
    {
        const int COUNT = 5;
        int[] nTimes = new int[COUNT];
        String strDirImg = @"C:\Users\Administrator\Desktop\新建文件夹";

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            lbl.Text = "显示次数:";
            String strPath = strDirImg + "/1.jpg";
            pictureBox1.Image = new Bitmap(strPath);
            String strPathCount = strDirImg + "count.txt";
            StreamReader sd = new StreamReader(strPathCount);
            String line;
            int nLine = 0;
            while ((line =sd.ReadLine())!=null)
            {
                int n = Convert.ToInt32(line);
                nTimes[nLine] = n;
                nLine++;
            }
        }

        private void btn_Click(object sender, EventArgs e)
        {
            Random rnd = new Random();
            int num = rnd.Next(1, COUNT + 1);
            nTimes[num - 1] = nTimes[num - 1] + 1;
            String strPath = strDirImg +"/"+ num + ".jpg";
            pictureBox1.Image = new Bitmap(strPath);
            lbl.Text = "图片" +  num + ".jpg" + "    显示次数:" + nTimes[num - 1];
        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            String strPathCount = strDirImg + "count.txt";
            StreamWriter sw = new StreamWriter(strPathCount);
            for (int n = 0; n < COUNT; n++)
            {
                sw.WriteLine(nTimes[n]);
            }
            sw.Close();
        }
    }
}

    FormDesigners.cs

namespace tupian1
{
    partial class Form1
    {
        /// 

        /// 必需的设计器变量。
        /// 
        private System.ComponentModel.IContainer components = null;

        /// 

        /// 清理所有正在使用的资源。
        /// 
        /// 如果应释放托管资源，为 true；否则为 false。
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows 窗体设计器生成的代码

        /// 

        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// 
        private void InitializeComponent()
        {
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1));
            this.pictureBox1 = new System.Windows.Forms.PictureBox();
            this.btn = new System.Windows.Forms.Button();
            this.lbl = new System.Windows.Forms.Label();
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
            this.SuspendLayout();
            // 
            // pictureBox1
            // 
            this.pictureBox1.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
            this.pictureBox1.Image = ((System.Drawing.Image)(resources.GetObject("pictureBox1.Image")));
            this.pictureBox1.Location = new System.Drawing.Point(49, 61);
            this.pictureBox1.Name = "pictureBox1";
            this.pictureBox1.Size = new System.Drawing.Size(177, 107);
            this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
            this.pictureBox1.TabIndex = 0;
            this.pictureBox1.TabStop = false;
            // 
            // btn
            // 
            this.btn.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
            this.btn.AutoSize = true;
            this.btn.Location = new System.Drawing.Point(149, 218);
            this.btn.Name = "btn";
            this.btn.Size = new System.Drawing.Size(89, 23);
            this.btn.TabIndex = 1;
            this.btn.Text = "随机显示";
            this.btn.UseVisualStyleBackColor = true;
            this.btn.Click += new System.EventHandler(this.btn_Click);
            // 
            // lbl
            // 
            this.lbl.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
            this.lbl.AutoSize = true;
            this.lbl.Location = new System.Drawing.Point(49, 190);
            this.lbl.Name = "lbl";
            this.lbl.Size = new System.Drawing.Size(41, 12);
            this.lbl.TabIndex = 2;
            this.lbl.Text = "label1";
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(284, 262);
            this.Controls.Add(this.lbl);
            this.Controls.Add(this.btn);
            this.Controls.Add(this.pictureBox1);
            this.Name = "Form1";
            this.Text = "Form1";
            this.FormClosed += new System.Windows.Forms.FormClosedEventHandler(this.Form1_FormClosed);
            this.Load += new System.EventHandler(this.Form1_Load);
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.PictureBox pictureBox1;
        private System.Windows.Forms.Button btn;
        private System.Windows.Forms.Label lbl;
    }
}

运行结果：