Question

c#实现winform下显示批量缩略图形式的图片

如题 使用c#写winform程序
在窗体中指定一个固定区域
区域中以缩略图形式显示图片
但图片数量不定 视所打开的文件夹中实际图片数量而定
且区域中 缩略图图片一侧带有CheckBox 可关联图片
由于区域大小固定 图片数量不定
则超出区域部分 产生单向滚动条
类似于windows中文件夹的幻灯片视图查看图片方式
只是不需要原图(大图) 且各个缩略图旁边带有CheckBox

不需要具体代码
请告知大体思路与使用何种控件 方法实现 谢谢

Answer 1

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

using System.Threading;
using System.IO;
using System.Diagnostics;
using System.Windows.Forms.Design;

namespace Image
{
public class ImageConvert
{
public static void ShowThumbnail(string oldfile, string newfile, int h, int w)
{

System.Drawing.Image img = System.Drawing.Image.FromFile(oldfile);
System.Drawing.Image.GetThumbnailImageAbort myCallback = new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);

int oldh = img.Height;
int oldw = img.Width;

int newh,neww;

double h1 = oldh*1.0/h;
double w1 = oldw*1.0/w;

double f = (h1>w1)? h1:w1;

if(f < 1.0)
{
newh = oldh;
neww = oldw;
}
else
{
newh = (int)(oldh/f);
neww = (int)(oldw/f);
}

System.Drawing.Image myThumbnail = img.GetThumbnailImage(neww, newh, myCallback, IntPtr.Zero);

myThumbnail.Save(newfile, System.Drawing.Imaging.ImageFormat.Jpeg);

img.Dispose();
myThumbnail.Dispose();
}
private static bool ThumbnailCallback()
{
return false;
}
}

public class FolderDialog : FolderNameEditor
{
FolderNameEditor.FolderBrowser fDialog = new System.Windows.Forms.Design.FolderNameEditor.FolderBrowser();
public FolderDialog()
{
}
public DialogResult DisplayDialog()
{
return DisplayDialog("请选择一个文件夹");
}

public DialogResult DisplayDialog(string description)
{
fDialog.Description = description;
return fDialog.ShowDialog();
}
public string Path
{
get
{
return fDialog.DirectoryPath;
}
}
~FolderDialog()
{
fDialog.Dispose();
}
}

/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.LinkLabel linkLabel1;
private System.Windows.Forms.LinkLabel linkLabel2;
private System.Windows.Forms.TextBox path1;
private System.Windows.Forms.TextBox path2;
private System.Windows.Forms.TextBox width;
private System.Windows.Forms.TextBox height;
private System.Windows.Forms.ListView listView1;
private System.Windows.Forms.LinkLabel linkLabel3;
private System.Windows.Forms.LinkLabel linkLabel4;
private System.Windows.Forms.ColumnHeader columnHeader1;
private System.Windows.Forms.ColumnHeader columnHeader2;
private System.Windows.Forms.ColumnHeader columnHeader3;
private System.Windows.Forms.ColumnHeader columnHeader4;
private System.Windows.Forms.ColumnHeader columnHeader5;
private System.Windows.Forms.ColumnHeader columnHeader6;

private ArrayList threads = new ArrayList();
private ArrayList images = new ArrayList();
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;

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
//
}

/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
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
/// <summary>
/// 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。
/// </summary>
private void InitializeComponent()
{
this.linkLabel1 = new System.Windows.Forms.LinkLabel();
this.linkLabel2 = new System.Windows.Forms.LinkLabel();
this.path1 = new System.Windows.Forms.TextBox();
this.path2 = new System.Windows.Forms.TextBox();
this.width = new System.Windows.Forms.TextBox();
this.height = new System.Windows.Forms.TextBox();
this.listView1 = new System.Windows.Forms.ListView();
this.linkLabel3 = new System.Windows.Forms.LinkLabel();
this.linkLabel4 = new System.Windows.Forms.LinkLabel();
this.columnHeader1 = new System.Windows.Forms.ColumnHeader();
this.columnHeader2 = new System.Windows.Forms.ColumnHeader();
this.columnHeader3 = new System.Windows.Forms.ColumnHeader();
this.columnHeader4 = new System.Windows.Forms.ColumnHeader();
this.columnHeader5 = new System.Windows.Forms.ColumnHeader();
this.columnHeader6 = new System.Windows.Forms.ColumnHeader();
this.SuspendLayout();
//
// linkLabel1
//
this.linkLabel1.Location = new System.Drawing.Point(456, 16);
this.linkLabel1.Name = "linkLabel1";
this.linkLabel1.Size = new System.Drawing.Size(32, 16);
this.linkLabel1.TabIndex = 0;
this.linkLabel1.TabStop = true;
this.linkLabel1.Text = "浏览";
this.linkLabel1.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.linkLabel1_LinkClicked);
//
// linkLabel2
//
this.linkLabel2.Location = new System.Drawing.Point(456, 48);
this.linkLabel2.Name = "linkLabel2";
this.linkLabel2.Size = new System.Drawing.Size(32, 16);
this.linkLabel2.TabIndex = 1;
this.linkLabel2.TabStop = true;
this.linkLabel2.Text = "浏览";
this.linkLabel2.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.linkLabel2_LinkClicked);
//
// path1
//
this.path1.Location = new System.Drawing.Point(16, 16);
this.path1.Name = "path1";
this.path1.Size = new System.Drawing.Size(432, 21);
this.path1.TabIndex = 2;
this.path1.Text = "";
//
// path2
//
this.path2.Location = new System.Drawing.Point(16, 48);
this.path2.Name = "path2";
this.path2.Size = new System.Drawing.Size(432, 21);
this.path2.TabIndex = 3;
this.path2.Text = "";
//
// width
//
this.width.Location = new System.Drawing.Point(80, 80);
this.width.Name = "width";
this.width.Size = new System.Drawing.Size(72, 21);
this.width.TabIndex = 4;
this.width.Text = "";
//
// height
//
this.height.Location = new System.Drawing.Point(216, 80);
this.height.Name = "height";
this.height.Size = new System.Drawing.Size(72, 21);
this.height.TabIndex = 5;
this.height.Text = "";
//
// listView1
//
this.listView1.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
this.columnHeader1,
this.columnHeader2,
this.columnHeader3,
this.columnHeader4,
this.columnHeader5,
this.columnHeader6});
this.listView1.Location = new System.Drawing.Point(16, 112);
this.listView1.Name = "listView1";
this.listView1.Size = new System.Drawing.Size(472, 152);
this.listView1.TabIndex = 6;
this.listView1.View = System.Windows.Forms.View.Details;
//
// linkLabel3
//
this.linkLabel3.Location = new System.Drawing.Point(304, 80);
this.linkLabel3.Name = "linkLabel3";
this.linkLabel3.Size = new System.Drawing.Size(32, 16);
this.linkLabel3.TabIndex = 7;
this.linkLabel3.TabStop = true;
this.linkLabel3.Text = "添加";
this.linkLabel3.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.linkLabel3_LinkClicked);
//
// linkLabel4
//
this.linkLabel4.Location = new System.Drawing.Point(376, 80);
this.linkLabel4.Name = "linkLabel4";
this.linkLabel4.Size = new System.Drawing.Size(32, 16);
this.linkLabel4.TabIndex = 8;
this.linkLabel4.TabStop = true;
this.linkLabel4.Text = "开始";
this.linkLabel4.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.linkLabel4_LinkClicked);
//
// columnHeader1
//
this.columnHeader1.Text = "源";
this.columnHeader1.Width = 122;
//
// columnHeader2
//
this.columnHeader2.Text = "目的";
this.columnHeader2.Width = 121;
//
// columnHeader3
//
this.columnHeader3.Text = "宽";
this.columnHeader3.Width = 49;
//
// columnHeader4
//
this.columnHeader4.Text = "高";
this.columnHeader4.Width = 42;
//
// columnHeader5
//
this.columnHeader5.Text = "文件数";
//
// columnHeader6
//
this.columnHeader6.Text = "完成数";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(504, 294);
this.Controls.Add(this.linkLabel4);
this.Controls.Add(this.linkLabel3);
this.Controls.Add(this.listView1);
this.Controls.Add(this.height);
this.Controls.Add(this.width);
this.Controls.Add(this.path2);
this.Controls.Add(this.path1);
this.Controls.Add(this.linkLabel2);
this.Controls.Add(this.linkLabel1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);

}
#endregion

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

private void linkLabel1_LinkClicked(object sender, System.Windows.Forms.LinkLabelLinkClickedEventArgs e)
{
FolderDialog dlg = new FolderDialog();
if(dlg.DisplayDialog()==DialogResult.OK)
path1.Text = dlg.Path;

}

private void linkLabel2_LinkClicked(object sender, System.Windows.Forms.LinkLabelLinkClickedEventArgs e)
{
FolderDialog dlg = new FolderDialog();
if(dlg.DisplayDialog()==DialogResult.OK)
path2.Text = dlg.Path;
}

private void linkLabel3_LinkClicked(object sender, System.Windows.Forms.LinkLabelLinkClickedEventArgs e)
{
string[] img = Directory.GetFiles(path1.Text, "*.jpg");

listView1.Items.Add(new ListViewItem(new string[]{path1.Text, path2.Text, width.Text, height.Text, img.Length.ToString(), "0"}));
}

private void linkLabel4_LinkClicked(object sender, System.Windows.Forms.LinkLabelLinkClickedEventArgs e)
{
foreach(ListViewItem item in listView1.Items)
{
Thread t = new Thread(new ThreadStart(Process));
t.Start();
threads.Add(t);
}
}

private void Process()
{
int index = threads.IndexOf(Thread.CurrentThread);
ListViewItem item = listView1.Items[index];
string path1 = item.SubItems[0].Text;
string path2 = item.SubItems[1].Text;
int width = int.Parse(item.SubItems[2].Text);
int height = int.Parse(item.SubItems[3].Text);
int i = 0;
foreach(string file1 in Directory.GetFiles(path1, "*.jpg"))
{
i++;
string file2 = path2 + @"\" + Path.GetFileName(file1);
ImageConvert.ShowThumbnail(file1,file2, height, width);
lock(listView1)
{
listView1.Items[index].SubItems[5].Text = i.ToString();
}
}
}
}
}
Release版下载地址：http://asp2004.net/temp/Image.exe

Answer 2

ListView应该可以实现你的功能..
有五种显示的方式

Answer 3

用datalist控件也可以