实验三c#实验报告

“C#”课程实验报告

3、图片自动播放预览

附录

源代码：

第二题：

using System;

using System.Collections.Generic;

using https://www.360docs.net/doc/d47907991.html,ponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace实验3._2

{ public partial class Form1 : Form

{ public Form1()

{InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{ TreeNode newnode = new TreeNode(this.textBox1.Text, 0, 1);

this.treeView1.Nodes.Add(newnode);

this.treeView1.Select();

}

private void button2_Click(object sender, EventArgs e)

{ TreeNode selectednode = this.treeView1.SelectedNode;

if(selectednode ==null )

{ MessageBox.Show("请选中节点");

return ;

}

if (selectednode.Parent != null)

{ MessageBox.Show("不能添加");

return;

}

TreeNode newnode=new TreeNode (this.textBox2 .Text ,2,3); selectednode .Nodes .Add (newnode );

selectednode .Expand ();

this.treeView1 .Select ();

}

private void button4_Click(object sender, EventArgs e)

{ treeView1.Nodes.Clear();

}

private void button3_Click(object sender, EventArgs e)

{ TreeNode selectnode = this.treeView1.SelectedNode;

if (selectnode == null)

{ MessageBox.Show("请选中节点");

return;

}

TreeNode parentnode = selectnode.Parent;

if (parentnode == null)

this.treeView1.Nodes.Remove(selectnode);

else

parentnode.Nodes.Remove(selectnode);

this.treeView1.Select();

}

private void Form1_Load(object sender, EventArgs e)

{

}

}

}

第5题：

using System;

using System.Drawing;

using System.Collections;

using https://www.360docs.net/doc/d47907991.html,ponentModel;

using System.Windows.Forms;

using System.Data;

namespace图片自动浏览器

{

///

/// Form1 的摘要说明。

///

public class Form1 : System.Windows.Forms.Form

{

private https://www.360docs.net/doc/d47907991.html,ponentModel.IContainer components;

private System.Windows.Forms.PictureBox pictureBox1;

private System.Windows.Forms.Button button1;

private System.Windows.Forms.ListBox listBox1;

private System.Windows.Forms.Button button2;

private System.Windows.Forms.OpenFileDialog openFileDialog1;

private System.Windows.Forms.Timer timer1;

private Label label1;

private int PicNo; //定义数据成员变量PicNo，表示显示图片号

public Form1()

{

//

// Windows 窗体设计器支持所必需的

//

InitializeComponent();

//

// TODO: 在InitializeComponent 调用后添加任何构造函数代码

//

}

protected override void Dispose( bool disposing ) {

if( disposing )

{

if (components != null)

{

components.Dispose();

}

}

base.Dispose( disposing );

}

#region Windows 窗体设计器生成的代码

private void InitializeComponent()

{

https://www.360docs.net/doc/d47907991.html,ponents = new https://www.360docs.net/doc/d47907991.html,ponentModel.Container();

this.pictureBox1 = new System.Windows.Forms.PictureBox();

this.button1 = new System.Windows.Forms.Button();

this.listBox1 = new System.Windows.Forms.ListBox();

this.button2 = new System.Windows.Forms.Button();

this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();

this.timer1 = new System.Windows.Forms.Timer(https://www.360docs.net/doc/d47907991.html,ponents);

https://www.360docs.net/doc/d47907991.html,bel1 = new https://www.360docs.net/doc/d47907991.html,bel();

((https://www.360docs.net/doc/d47907991.html,ponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();

this.SuspendLayout();

//

// pictureBox1

//

this.pictureBox1.Location = new System.Drawing.Point(12, 52);

https://www.360docs.net/doc/d47907991.html, = "pictureBox1";

this.pictureBox1.Size = new System.Drawing.Size(184, 216);

this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;

this.pictureBox1.TabIndex = 0;

this.pictureBox1.TabStop = false;

//

// button1

//

this.button1.Location = new System.Drawing.Point(212, 52);

https://www.360docs.net/doc/d47907991.html, = "button1";

this.button1.Size = new System.Drawing.Size(80, 32);

this.button1.TabIndex = 1;

this.button1.Text = "选择图片";

this.button1.Click += new System.EventHandler(this.button1_Click);

//

// listBox1

//

this.listBox1.ItemHeight = 12;

this.listBox1.Location = new System.Drawing.Point(212, 100);

https://www.360docs.net/doc/d47907991.html, = "listBox1";

this.listBox1.Size = new System.Drawing.Size(168, 160);

this.listBox1.TabIndex = 2;

//

// button2

//

this.button2.Location = new System.Drawing.Point(308, 52);

https://www.360docs.net/doc/d47907991.html, = "button2";

this.button2.Size = new System.Drawing.Size(72, 32);

this.button2.TabIndex = 3;

this.button2.Text = "浏览";

this.button2.Click += new System.EventHandler(this.button2_Click);

//

// timer1

//

this.timer1.Interval = 1000;

this.timer1.Tick += new System.EventHandler(this.timer1_Tick);

//

// label1

//

https://www.360docs.net/doc/d47907991.html,bel1.AutoSize = true;

https://www.360docs.net/doc/d47907991.html,bel1.Location = new System.Drawing.Point(23, 18);

https://www.360docs.net/doc/d47907991.html, = "label1";

https://www.360docs.net/doc/d47907991.html,bel1.Size = new System.Drawing.Size(269, 12);

https://www.360docs.net/doc/d47907991.html,bel1.TabIndex = 4;

https://www.360docs.net/doc/d47907991.html,bel1.Text = "通过“选择图片”按钮将所需图片添加到列表框中";

//

// Form1

//

this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);

this.ClientSize = new System.Drawing.Size(403, 280);

this.Controls.Add(https://www.360docs.net/doc/d47907991.html,bel1);

this.Controls.Add(this.button2);

this.Controls.Add(this.listBox1);

this.Controls.Add(this.button1);

this.Controls.Add(this.pictureBox1);

https://www.360docs.net/doc/d47907991.html, = "Form1";

this.Text = "Form1";

this.Load += new System.EventHandler(this.Form1_Load);

((https://www.360docs.net/doc/d47907991.html,ponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();

this.ResumeLayout(false);

this.PerformLayout();

}

#endregion

[STAThread]

static void Main()

{

Application.Run(new Form1());

}

private void Form1_Load(object sender, System.EventArgs e)

{

PicNo = 0;

timer1.Enabled = false;// 设置定时器不可用

}

private void button1_Click(object sender, System.EventArgs e)

//通过“选择图片”按钮将所需图片添加到列表框中

{

//设置过滤器，只显示图像文件

openFileDialog1.Filter = "位图文件|*.bmp|GIF文件|*.gif|JPEG文件|*.jpg";

// 指定缺省过滤器（默认打开JPEG文件）

openFileDialog1.FilterIndex = 3;

openFileDialog1.ShowDialog(); //显示“打开”对话框

// 将用户选定文件载入列表框

listBox1.Items.Add(openFileDialog1.FileName );

}

private void button2_Click(object sender, System.EventArgs e)

{

timer1.Enabled = true;// 设置定时器可用

}

private void timer1_Tick(object sender, System.EventArgs e)

{

listBox1.SelectedIndex= PicNo;

string s=listBox1.SelectedItem.ToString();// 得到某一要显示图片的路径 pictureBox1.Image = Image.FromFile (s); // 加载图片

PicNo = PicNo + 1 ;// 为得到下一张图片做准备

if (PicNo >= listBox1.Items.Count)

// 如果是最后一张，则转为第一张

PicNo = 0;

}

}

}