要求：
目标3的功能简介：有若干张图片（自己确定，不少于5张，命名方法自定），窗体有3个控件（PictureBox，按钮，label）；按下”随机显示“按钮，则随机显示一张图片，并给出该图片显示的次数在右边的label中；同时在”关闭“窗体时，把每张图片目前已经显示的次数写入到指定文件中，方便下次程序运行时使用。
大家可以再增加功能，比如图片名称为”学号姓名“，显示姓名在图片上方（增加一个label）；……；越来越接近玩”猜猜看“（显示一张相片，给定3个候选名字，猜测；或 显示3张相片，给定1个候选名字，猜测是那一张相片等）。
第一步：做了可视化设计及部分属性的初始化：
如下图所示：
第二步：在form1.cs中对一些事件和函数封装：
代码如下：
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 WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void show()
{
Random x = new Random();
int i = x.Next(1, 10);
string r = @"C:\Users\Administrator.LBDZ-20121019BZ\Documents\Visual Studio 2013\Projects\WindowsFormsApplication2\WindowsFormsApplication2\imgdata\"+i+".jpg";
Bitmap img1 = new Bitmap(r);
pictureBox1.Image=img1;
lbl1.Text = "随机次数:" + op;
lbl2.Text = "图片:"+i + ".jpg";
}
private void infoout()
{
using (FileStream aFile = new FileStream(@"C:\Users\Administrator.LBDZ-20121019BZ\Documents\Visual Studio 2013\Projects\WindowsFormsApplication2\WindowsFormsApplication2\imgdata\info.txt", FileMode.OpenOrCreate))
{
using (StreamWriter sw = new StreamWriter(aFile, Encoding.UTF8))
{
sw.WriteLine(lbl1.Text);
sw.WriteLine("当前显示图片为"+lbl2.Text);
}
}
}
private void button1_Click(object sender, EventArgs e)
{
op++;
show();
}
private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
infoout();
}
}
}具体的函数和属性代码如下
Form1.Designer.cs:
namespace WindowsFormsApplication2
{
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.btn1 = new System.Windows.Forms.Button();
this.pictureBox1 = new System.Windows.Forms.PictureBox();
this.lbl1 = new System.Windows.Forms.Label();
this.lbl2 = new System.Windows.Forms.Label();
((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
this.SuspendLayout();
//
// btn1
//
this.btn1.BackColor = System.Drawing.SystemColors.ActiveCaption;
this.btn1.Location = new System.Drawing.Point(87, 337);
this.btn1.Name = "btn1";
this.btn1.Size = new System.Drawing.Size(75, 23);
this.btn1.TabIndex = 0;
this.btn1.Text = "随机显示";
this.btn1.UseVisualStyleBackColor = false;
this.btn1.Click += new System.EventHandler(this.button1_Click);
//
// pictureBox1
//
this.pictureBox1.ImageLocation = "C:\\Users\\Administrator.LBDZ-20121019BZ\\Documents\\Visual Studio 2013\\Projects\\Wind" +
"owsFormsApplication2\\WindowsFormsApplication2\\imgdata\\1.jpg";
this.pictureBox1.Location = new System.Drawing.Point(87, 24);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(363, 280);
this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
this.pictureBox1.TabIndex = 1;
this.pictureBox1.TabStop = false;
//
// lbl1
//
this.lbl1.AutoSize = true;
this.lbl1.BackColor = System.Drawing.SystemColors.ControlLight;
this.lbl1.Location = new System.Drawing.Point(385, 342);
this.lbl1.Name = "lbl1";
this.lbl1.Size = new System.Drawing.Size(65, 12);
this.lbl1.TabIndex = 2;
this.lbl1.Text = "随机次数:0";
//
// lbl2
//
this.lbl2.AutoSize = true;
this.lbl2.BackColor = System.Drawing.SystemColors.ControlLight;
this.lbl2.Location = new System.Drawing.Point(268, 342);
this.lbl2.Name = "lbl2";
this.lbl2.Size = new System.Drawing.Size(65, 12);
this.lbl2.TabIndex = 3;
this.lbl2.Text = "图片:1.jpg";
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.BackColor = System.Drawing.SystemColors.GradientActiveCaption;
this.ClientSize = new System.Drawing.Size(582, 377);
this.Controls.Add(this.lbl2);
this.Controls.Add(this.lbl1);
this.Controls.Add(this.pictureBox1);
this.Controls.Add(this.btn1);
this.Name = "Form1";
this.Text = "随机图片显示器";
this.FormClosed += new System.Windows.Forms.FormClosedEventHandler(this.Form1_FormClosed);
((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
int op=0;
private System.Windows.Forms.Button btn1;
private System.Windows.Forms.PictureBox pictureBox1;
private System.Windows.Forms.Label lbl1;
private System.Windows.Forms.Label lbl2;
}
}program.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApplication2
{
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
}第三步：运行结果及文件截图：
原文地址：http://lsywuya77.blog.51cto.com/9516729/1636647
