ImageList.ImageCollection 类
**命名空间:**System.Windows.Forms
**程序集:**System.Windows.Forms（在 system.windows.forms.dll 中）
语法
声明
Public NotInheritable Class ImageCollection
Implements IList, ICollection, IEnumerable
用法
Dim instance As ImageCollection
public sealed class ImageCollection : IList, ICollection, IEnumerable
public ref class ImageCollection sealed : IList, ICollection, IEnumerable
public final class ImageCollection implements IList, ICollection,
IEnumerable
public final class ImageCollection implements IList, ICollection,
IEnumerable
备注
这用来以编程方式管理 ImageList 中的图像，并提供添加和移除图像对象的方法。
示例
下面的代码示例演示如何从 ImageList 类的 Images 属性中选择、移除和显示图像，此类为 ImageList.ImageCollection 类型。
Imports System
Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms
Public Class Form1
Inherits System.Windows.Forms.Form
Private listBox1 As System.Windows.Forms.ListBox
Private label3 As System.Windows.Forms.Label
Private WithEvents button1 As System.Windows.Forms.Button
Private WithEvents button2 As System.Windows.Forms.Button
Private WithEvents button3 As System.Windows.Forms.Button
Private WithEvents button4 As System.Windows.Forms.Button
Private pictureBox1 As System.Windows.Forms.PictureBox
Private imageList1 As System.Windows.Forms.ImageList
Private openFileDialog1 As System.Windows.Forms.OpenFileDialog
Protected myGraphics As Graphics
Private panel1 As System.Windows.Forms.Panel
Private label5 As System.Windows.Forms.Label
Private currentImage As Integer = 0
Public Sub New()
imageList1 = New ImageList()
InitializeComponent()
' The default image size is 16 x 16, which sets up a larger
' image size.
imageList1.ImageSize = New Size(255, 255)
imageList1.TransparentColor = Color.White
' Assigns the graphics object to use in the draw options.
myGraphics = Graphics.FromHwnd(panel1.Handle)
End Sub 'New
Private Sub InitializeComponent()
Me.listBox1 = New System.Windows.Forms.ListBox()
Me.label3 = New System.Windows.Forms.Label()
Me.button1 = New System.Windows.Forms.Button()
Me.button2 = New System.Windows.Forms.Button()
Me.button3 = New System.Windows.Forms.Button()
Me.button4 = New System.Windows.Forms.Button()
Me.pictureBox1 = New System.Windows.Forms.PictureBox()
Me.openFileDialog1 = New System.Windows.Forms.OpenFileDialog()
Me.panel1 = New System.Windows.Forms.Panel()
Me.label5 = New System.Windows.Forms.Label()
Me.SuspendLayout()
Me.listBox1.Location = New System.Drawing.Point(16, 16)
Me.listBox1.Size = New System.Drawing.Size(400, 95)
Me.listBox1.TabIndex = 0
Me.label3.Location = New System.Drawing.Point(24, 168)
Me.label3.Text = "label3"
Me.button1.Location = New System.Drawing.Point(96, 128)
Me.button1.Size = New System.Drawing.Size(104, 23)
Me.button1.Text = "Show Next Image"
Me.button2.Location = New System.Drawing.Point(208, 128)
Me.button2.Size = New System.Drawing.Size(104, 23)
Me.button2.Text = "Remove Image"
Me.button3.Location = New System.Drawing.Point(320, 128)
Me.button3.Text = "Clear List"
Me.button4.Location = New System.Drawing.Point(16, 128)
Me.button4.Text = "Open Image"
Me.pictureBox1.Location = New System.Drawing.Point(328, 232)
Me.pictureBox1.Size = New System.Drawing.Size(336, 192)
Me.imageList1.ImageSize = New System.Drawing.Size(16, 16)
Me.imageList1.TransparentColor = System.Drawing.Color.Transparent
Me.panel1.Location = New System.Drawing.Point(8, 240)
Me.panel1.Size = New System.Drawing.Size(296, 184)
Me.label5.Location = New System.Drawing.Point(168, 168)
Me.label5.Size = New System.Drawing.Size(312, 40)
Me.label5.Text = "label5"
Me.ClientSize = New System.Drawing.Size(672, 461)
Me.Controls.Add(label5)
Me.Controls.Add(panel1)
Me.Controls.Add(pictureBox1)
Me.Controls.Add(button4)
Me.Controls.Add(button3)
Me.Controls.Add(button2)
Me.Controls.Add(button1)
Me.Controls.Add(label3)
Me.Controls.Add(listBox1)
Me.ResumeLayout(False)
End Sub
' Display the image.
Private Sub button1_Click(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles button1.Click
If imageList1.Images.Empty <> True Then
If imageList1.Images.Count - 1 > currentImage Then
currentImage += 1
Else
currentImage = 0
End If
panel1.Refresh()
' Draw the image in the panel.
imageList1.Draw(myGraphics, 10, 10, currentImage)
' Show the image in the PictureBox.
pictureBox1.Image = imageList1.Images(currentImage)
label3.Text = "Current image is " + currentImage.ToString
listBox1.SelectedIndex = currentImage
label5.Text = "Image is " + listBox1.Text
End If
End Sub
' Remove the image.
Private Sub button2_Click(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles button2.Click
imageList1.Images.RemoveAt(listBox1.SelectedIndex)
listBox1.Items.Remove(listBox1.SelectedItem)
End Sub
' Clear all images.
Private Sub button3_Click(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles button3.Click
imageList1.Images.Clear()
listBox1.Items.Clear()
End Sub
' Find an image.
Private Sub button4_Click(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles button4.Click
openFileDialog1.Multiselect = True
If openFileDialog1.ShowDialog() = DialogResult.OK Then
If Not (openFileDialog1.FileNames Is Nothing) Then
Dim i As Integer
For i = 0 To openFileDialog1.FileNames.Length - 1
addImage(openFileDialog1.FileNames(i))
Next i
Else
addImage(openFileDialog1.FileName)
End If
End If
End Sub
Private Sub addImage(ByVal imageToLoad As String)
If imageToLoad <> "" Then
imageList1.Images.Add(Image.FromFile(imageToLoad))
listBox1.BeginUpdate()
listBox1.Items.Add(imageToLoad)
listBox1.EndUpdate()
End If
End Sub
Public Shared Sub Main(ByVal args() As String)
Application.Run(New Form1())
End Sub
End Class
namespace myImageRotator
{
using System;
using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;
public class Form1 : System.Windows.Forms.Form
{
private System.ComponentModel.IContainer components;
private System.Windows.Forms.ListBox listBox1;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Button button3;
private System.Windows.Forms.Button button4;
private System.Windows.Forms.PictureBox pictureBox1;
private System.Windows.Forms.ImageList imageList1;
private System.Windows.Forms.OpenFileDialog openFileDialog1;
protected Graphics myGraphics;
private System.Windows.Forms.Panel panel1;
private System.Windows.Forms.Label label5;
private int currentImage = 0;
public Form1()
{
InitializeComponent();
imageList1 = new ImageList () ;
// The default image size is 16 x 16, which sets up a larger
// image size.
imageList1.ImageSize = new Size(255,255);
imageList1.TransparentColor = Color.White;
// Assigns the graphics object to use in the draw options.
myGraphics = Graphics.FromHwnd(panel1.Handle);
}
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.listBox1 = new System.Windows.Forms.ListBox();
this.label3 = new System.Windows.Forms.Label();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.button4 = new System.Windows.Forms.Button();
this.pictureBox1 = new System.Windows.Forms.PictureBox();
this.imageList1 = new System.Windows.Forms.ImageList(this.components);
this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
this.panel1 = new System.Windows.Forms.Panel();
this.label5 = new System.Windows.Forms.Label();
this.SuspendLayout();
this.listBox1.Location = new System.Drawing.Point(16, 16);
this.listBox1.Size = new System.Drawing.Size(400, 95);
this.listBox1.TabIndex = 0;
this.label3.Location = new System.Drawing.Point(24, 168);
this.label3.Text = "label3";
this.button1.Location = new System.Drawing.Point(96, 128);
this.button1.Size = new System.Drawing.Size(104, 23);
this.button1.Text = "Show Next Image";
this.button1.Click += new System.EventHandler(this.button1_Click);
this.button2.Location = new System.Drawing.Point(208, 128);
this.button2.Size = new System.Drawing.Size(104, 23);
this.button2.Text = "Remove Image";
this.button2.Click += new System.EventHandler(this.button2_Click);
this.button3.Location = new System.Drawing.Point(320, 128);
this.button3.Text = "Clear List";
this.button3.Click += new System.EventHandler(this.button3_Click);
this.button4.Location = new System.Drawing.Point(16, 128);
this.button4.Text = "Open Image";
this.button4.Click += new System.EventHandler(this.button4_Click);
this.pictureBox1.Location = new System.Drawing.Point(328, 232);
this.pictureBox1.Size = new System.Drawing.Size(336, 192);
this.imageList1.ImageSize = new System.Drawing.Size(16, 16);
this.imageList1.TransparentColor = System.Drawing.Color.Transparent;
this.panel1.Location = new System.Drawing.Point(8, 240);
this.panel1.Size = new System.Drawing.Size(296, 184);
this.label5.Location = new System.Drawing.Point(168, 168);
this.label5.Size = new System.Drawing.Size(312, 40);
this.label5.Text = "label5";
this.ClientSize = new System.Drawing.Size(672, 461);
this.Controls.Add(this.label5);
this.Controls.Add(this.panel1);
this.Controls.Add(this.pictureBox1);
this.Controls.Add(this.button4);
this.Controls.Add(this.button3);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Controls.Add(this.label3);
this.Controls.Add(this.listBox1);
this.ResumeLayout(false);
}
// Display the image.
private void button1_Click (object sender, System.EventArgs e)
{
if(imageList1.Images.Empty != true)
{
if(imageList1.Images.Count-1 > currentImage)
{
currentImage++;
}
else
{
currentImage=0;
}
panel1.Refresh();
// Draw the image in the panel.
imageList1.Draw(myGraphics,10,10,currentImage);
// Show the image in the PictureBox.
pictureBox1.Image = imageList1.Images[currentImage];
label3.Text = "Current image is " + currentImage ;
listBox1.SelectedIndex = currentImage;
label5.Text = "Image is " + listBox1.Text ;
}
}
// Remove the image.
private void button2_Click (object sender, System.EventArgs e)
{
imageList1.Images.RemoveAt(listBox1.SelectedIndex);
listBox1.Items.Remove(listBox1.SelectedItem);
}
// Clear all images.
private void button3_Click (object sender, System.EventArgs e)
{
imageList1.Images.Clear();
listBox1.Items.Clear();
}
// Find an image.
private void button4_Click (object sender, System.EventArgs e)
{
openFileDialog1.Multiselect = true ;
if(openFileDialog1.ShowDialog() == DialogResult.OK)
{
if (openFileDialog1.FileNames != null)
{
for(int i =0 ; i < openFileDialog1.FileNames.Length ; i++ )
{
addImage(openFileDialog1.FileNames[i]);
}
}
else
addImage(openFileDialog1.FileName);
}
}
private void addImage(string imageToLoad)
{
if (imageToLoad != "")
{
imageList1.Images.Add(Image.FromFile(imageToLoad));
listBox1.BeginUpdate();
listBox1.Items.Add(imageToLoad);
listBox1.EndUpdate();
}
}
public static void Main(string[] args)
{
Application.Run(new Form1());
}
}
}
namespace myImageRotator
#using <System.dll>
#using <System.Drawing.dll>
#using <System.Windows.Forms.dll>
{
using namespace System;
using namespace System::Drawing;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;
public ref class Form1 : public System::Windows::Forms::Form
{
private:
System::ComponentModel::IContainer^ components;
private:
System::Windows::Forms::ListBox^ listBox1;
private:
System::Windows::Forms::Label^ label3;
private:
System::Windows::Forms::Button^ button1;
private:
System::Windows::Forms::Button^ button2;
private:
System::Windows::Forms::Button^ button3;
private:
System::Windows::Forms::Button^ button4;
private:
System::Windows::Forms::PictureBox^ pictureBox1;
private:
System::Windows::Forms::ImageList^ imageList1;
private:
System::Windows::Forms::OpenFileDialog^ openFileDialog1;
protected:
Graphics^ myGraphics;
private:
System::Windows::Forms::Panel^ panel1;
private:
System::Windows::Forms::Label^ label5;
private:
int currentImage;
public:
Form1()
{
InitializeComponent();
imageList1 = gcnew ImageList () ;
currentImage = 0;
// The default image size is 16 x 16, which sets up a larger
// image size.
imageList1->ImageSize = System::Drawing::Size(255,255);
imageList1->TransparentColor = Color::White;
// Assigns the graphics object to use in the draw options.
myGraphics = Graphics::FromHwnd(panel1->Handle);
}
private:
void InitializeComponent()
{
this->components = gcnew System::ComponentModel::Container();
this->listBox1 = gcnew System::Windows::Forms::ListBox();
this->label3 = gcnew System::Windows::Forms::Label();
this->button1 = gcnew System::Windows::Forms::Button();
this->button2 = gcnew System::Windows::Forms::Button();
this->button3 = gcnew System::Windows::Forms::Button();
this->button4 = gcnew System::Windows::Forms::Button();
this->pictureBox1 = gcnew System::Windows::Forms::PictureBox();
this->imageList1 = gcnew System::Windows::Forms::ImageList(this->components);
this->openFileDialog1 = gcnew System::Windows::Forms::OpenFileDialog();
this->panel1 = gcnew System::Windows::Forms::Panel();
this->label5 = gcnew System::Windows::Forms::Label();
this->SuspendLayout();
this->listBox1->Location = System::Drawing::Point(16, 16);
this->listBox1->Size = System::Drawing::Size(400, 95);
this->listBox1->TabIndex = 0;
this->label3->Location = System::Drawing::Point(24, 168);
this->label3->Text = "label3";
this->button1->Location = System::Drawing::Point(96, 128);
this->button1->Size = System::Drawing::Size(104, 23);
this->button1->Text = "Show Next Image";
this->button1->Click += gcnew System::EventHandler(this,&Form1::button1_Click);
this->button2->Location = System::Drawing::Point(208, 128);
this->button2->Size = System::Drawing::Size(104, 23);
this->button2->Text = "Remove Image";
this->button2->Click += gcnew System::EventHandler(this,&Form1::button2_Click);
this->button3->Location = System::Drawing::Point(320, 128);
this->button3->Text = "Clear List";
this->button3->Click += gcnew System::EventHandler(this,&Form1::button3_Click);
this->button4->Location = System::Drawing::Point(16, 128);
this->button4->Text = "Open Image";
this->button4->Click += gcnew System::EventHandler(this,&Form1::button4_Click);
this->pictureBox1->Location = System::Drawing::Point(328, 232);
this->pictureBox1->Size = System::Drawing::Size(336, 192);
this->imageList1->ImageSize = System::Drawing::Size(16, 16);
this->imageList1->TransparentColor = System::Drawing::Color::Transparent;
this->panel1->Location = System::Drawing::Point(8, 240);
this->panel1->Size = System::Drawing::Size(296, 184);
this->label5->Location = System::Drawing::Point(168, 168);
this->label5->Size = System::Drawing::Size(312, 40);
this->label5->Text = "label5";
this->ClientSize = System::Drawing::Size(672, 461);
this->Controls->Add(this->label5);
this->Controls->Add(this->panel1);
this->Controls->Add(this->pictureBox1);
this->Controls->Add(this->button4);
this->Controls->Add(this->button3);
this->Controls->Add(this->button2);
this->Controls->Add(this->button1);
this->Controls->Add(this->label3);
this->Controls->Add(this->listBox1);
this->ResumeLayout(false);
}
// Display the image.
private:
void button1_Click (Object^ /*sender*/, System::EventArgs^ /*e*/)
{
if(imageList1->Images->Empty != true)
{
if(imageList1->Images->Count-1 > currentImage)
{
currentImage++;
}
else
{
currentImage=0;
}
panel1->Refresh();
// Draw the image in the panel.
imageList1->Draw(myGraphics,10,10,currentImage);
// Show the image in the PictureBox.
pictureBox1->Image = imageList1->Images[currentImage];
label3->Text = "Current image is " + currentImage ;
listBox1->SelectedIndex = currentImage;
// label5->Text = "Image is " + listBox1->Text ;
label5->Text = String::Concat("Image is ",listBox1->Text);
}
}
// Remove the image.
private:
void button2_Click (Object^ /*sender*/, System::EventArgs^ /*e*/)
{
imageList1->Images->RemoveAt(listBox1->SelectedIndex);
listBox1->Items->Remove(listBox1->SelectedItem);
}
// Clear all images.
private:
void button3_Click (Object^ /*sender*/, System::EventArgs^ /*e*/)
{
imageList1->Images->Clear();
listBox1->Items->Clear();
}
// Find an image.
private:
void button4_Click (Object^ /*sender*/, System::EventArgs^ /*e*/)
{
openFileDialog1->Multiselect = true ;
if(openFileDialog1->ShowDialog() == System::Windows::Forms::DialogResult::OK)
{
if (openFileDialog1->FileNames != nullptr)
{
for(int i =0 ; i < openFileDialog1->FileNames->Length ; i++ )
{
addImage(openFileDialog1->FileNames[i]);
}
}
else
addImage(openFileDialog1->FileName);
}
}
private:
void addImage(String^ imageToLoad)
{
if (imageToLoad != "")
{
imageList1->Images->Add(Image::FromFile(imageToLoad));
listBox1->BeginUpdate();
listBox1->Items->Add(imageToLoad);
listBox1->EndUpdate();
}
}
public:
static void Main(array<String^>^ /*args*/)
{
Application::Run(gcnew Form1());
}
};
}
int main(){
myImageRotator::Form1::Main(nullptr);
}
package myImageRotator;
import System.*;
import System.Drawing.*;
import System.ComponentModel.*;
import System.Windows.Forms.*;
public class Form1 extends System.Windows.Forms.Form
{
protected Container components;
protected ListBox listBox1;
protected Label label2;
protected Label label3;
protected Label label5;
protected PictureBox pictureBox1;
protected Button button1;
protected Button button2;
protected Button button3;
protected Button button4;
protected Panel panel1;
protected ImageList imageList1;
protected Graphics myGraphics;
protected OpenFileDialog openFileDialog1;
private int currentImage = 0;
public Form1()
{
InitializeComponent();
imageList1 = new ImageList();
// The default image size is 16 x 16, which sets up a larger
// image size.
imageList1.set_ImageSize(new Size(255, 255));
imageList1.set_TransparentColor(Color.get_White());
// Assigns the graphics object to use in the draw options.
myGraphics = Graphics.FromHwnd(panel1.get_Handle());
} //Form1
protected void Dispose(boolean disposing)
{
if (disposing) {
if (components != null) {
components.Dispose();
}
}
super.Dispose(disposing);
} //Dispose
private void InitializeComponent()
{
// Initializations for listBox1, label2, pictureBox1,
// button2, button3, panel1, openFileDialog1, button4, label1,
// button1, and imageList1.
} //InitializeComponent
protected void button1_Click(Object sender, System.EventArgs e)
{
DisplayNextImage();
} //button1_Click
protected void button2_Click(Object sender, System.EventArgs e)
{
imageList1.get_Images().RemoveAt(listBox1.get_SelectedIndex());
listBox1.get_Items().Remove(new Integer(listBox1.
get_SelectedIndex()));
} //button2_Click
protected void button3_Click(Object sender, System.EventArgs e)
{
imageList1.get_Images().Clear();
} //button3_Click
protected void button4_Click(Object sender, System.EventArgs e)
{
openFileDialog1.set_Multiselect(true);
if (openFileDialog1.ShowDialog().Equals(get_DialogResult().OK)) {
if (openFileDialog1.get_FileNames() != null) {
for (int i = 0; i < openFileDialog1.get_FileNames().length;
i++) {
AddImage(openFileDialog1.get_FileNames()[i]);
}
}
else {
AddImage(openFileDialog1.get_FileName());
}
}
} //button4_Click
private void AddImage(String imageToLoad)
{
if (!(imageToLoad.Equals(""))) {
imageList1.get_Images().Add(Image.FromFile(imageToLoad));
listBox1.BeginUpdate();
listBox1.get_Items().Add(imageToLoad);
listBox1.EndUpdate();
}
} //AddImage
void DisplayNextImage()
{
if (imageList1.get_Images().get_Empty() != true) {
if (imageList1.get_Images().get_Count() - 1 < currentImage) {
currentImage++;
}
else {
currentImage = 0;
}
panel1.Refresh();
imageList1.Draw(myGraphics, 10, 10, currentImage);
pictureBox1.set_Image(imageList1.get_Images().
get_Item(currentImage));
label3.set_Text("Current image is " + currentImage);
listBox1.set_SelectedIndex(currentImage);
label5.set_Text("Image is " + listBox1.get_Text());
}
} //DisplayNextImage
public static void main(String[] args)
{
Application.Run(new Form1());
} //main
} //Form1
继承层次结构
System.Object
System.Windows.Forms.ImageList.ImageCollection
线程安全
此类型的任何公共静态（Visual Basic 中的 Shared）成员都是线程安全的，但不保证所有实例成员都是线程安全的。
平台
Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、Windows Mobile for Smartphone、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。
版本信息
.NET Framework
受以下版本支持：2.0、1.1、1.0
.NET Compact Framework
受以下版本支持：2.0、1.0