ImageList 類別
定義
public ref class ImageList sealed : System::ComponentModel::Component
[System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.ImageListConverter))]
public sealed class ImageList : System.ComponentModel.Component
[<System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.ImageListConverter))>]
type ImageList = class
inherit Component
Public NotInheritable Class ImageList
Inherits Component
- 繼承
- 屬性
範例
下列程式碼範例顯示如何選取、移除和顯示影像。The following code example shows how to select, remove, and display images.
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());
}
};
}
[STAThreadAttribute]
int main(){
myImageRotator::Form1::Main(nullptr);
}
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();
}
}
[STAThread]
public static void Main(string[] args)
{
Application.Run(new Form1());
}
}
}
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
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 (openFileDialog1.FileNames IsNot 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
<StaThread()> _
Public Shared Sub Main(ByVal args() As String)
Application.Run(New Form1())
End Sub
End Class
備註
ImageList 通常由其他控制項使用,例如 ListView 、 TreeView 或 ToolBar 。ImageList is typically used by other controls, such as the ListView, TreeView, or ToolBar. 您可以將點陣圖或圖示新增至 ImageList ,而其他控制項則可以視需要使用影像。You can add bitmaps or icons to the ImageList, and the other controls are able to use the images as they require.
ImageList 使用控制碼來管理影像清單。ImageList uses a handle to manage the list of images. 在 Handle Handle Draw 影像清單上執行特定作業(例如取得或呼叫)之前,不會建立。The Handle is not created until certain operations, such as getting the Handle or calling Draw, are performed on the image list. 執行其他作業(例如設定或) ColorDepth ImageSize 將會導致 Handle 重新建立。Performing other operations, such as setting the ColorDepth or ImageSize will cause the Handle to be recreated. 因此,在將影像新增至之前,您應該先執行這些作業 ImageList 。Therefore, you should perform these operations before you add images to the ImageList. 此外,當您使用將當地語系化的表單時, ImageList 當表單的 Language 屬性設定為 Default 時,您應該一律加入和影像。In addition, when you work with forms that will be localized, you should always add an ImageList and images when the Language property of a form is set to Default. 在新增影像之前變更表單的語言,將會損毀應用程式資源檔。Changing the form's language before you add images will corrupt the application resource files.
建構函式
ImageList() |
使用 ImageList、ColorDepth 和 ImageSize 的預設值來初始化 TransparentColor 類別的新執行個體。Initializes a new instance of the ImageList class with default values for ColorDepth, ImageSize, and TransparentColor. |
ImageList(IContainer) |
初始化 ImageList 類別的新執行個體,將它與容器 (Container) 相關聯。Initializes a new instance of the ImageList class, associating it with a container. |
屬性
CanRaiseEvents |
取得值,指出元件是否能引發事件。Gets a value indicating whether the component can raise an event. (繼承來源 Component) |
ColorDepth |
取得影像清單的色彩深度。Gets the color depth of the image list. |
Container |
取得包含 IContainer 的 Component。Gets the IContainer that contains the Component. (繼承來源 Component) |
DesignMode |
取得值,指出 Component 目前是否處於設計模式。Gets a value that indicates whether the Component is currently in design mode. (繼承來源 Component) |
Events |
取得附加在這個 Component 上的事件處理常式清單。Gets the list of event handlers that are attached to this Component. (繼承來源 Component) |
Handle |
取得影像清單物件的控制代碼。Gets the handle of the image list object. |
HandleCreated |
取得值,指出是否已經建立基礎的 Win32 控制代碼。Gets a value indicating whether the underlying Win32 handle has been created. |
Images |
取得這個影像清單的 ImageList.ImageCollection。Gets the ImageList.ImageCollection for this image list. |
ImageSize |
取得或設定影像清單中的影像大小。Gets or sets the size of the images in the image list. |
ImageStream |
取得與這個影像清單相關的 ImageListStreamer。Gets the ImageListStreamer associated with this image list. |
Site |
取得或設定 Component 的 ISite。Gets or sets the ISite of the Component. (繼承來源 Component) |
Tag |
取得或設定物件,這個物件包含 ImageList 的其他相關資料。Gets or sets an object that contains additional data about the ImageList. |
TransparentColor |
取得或設定視為透明的色彩。Gets or sets the color to treat as transparent. |
方法
CreateObjRef(Type) |
建立包含所有相關資訊的物件,這些資訊是產生用來與遠端物件通訊的所需 Proxy。Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (繼承來源 MarshalByRefObject) |
Dispose() |
釋放 Component 所使用的所有資源。Releases all resources used by the Component. (繼承來源 Component) |
Dispose(Boolean) |
釋放 Component 所使用的 Unmanaged 資源,並選擇性地釋放 Managed 資源。Releases the unmanaged resources used by the Component and optionally releases the managed resources. (繼承來源 Component) |
Draw(Graphics, Int32, Int32, Int32) |
在指定 Graphics 的指定位置上,描繪由指定索引所指示的影像。Draws the image indicated by the given index on the specified Graphics at the specified location. |
Draw(Graphics, Int32, Int32, Int32, Int32, Int32) |
使用指定的位置和大小,在指定的 Graphics 上描繪由指定索引所表示的影像。Draws the image indicated by the given index on the specified Graphics using the specified location and size. |
Draw(Graphics, Point, Int32) |
在指定 Graphics 的指定位置上,描繪由指定索引所指示的影像。Draws the image indicated by the specified index on the specified Graphics at the given location. |
Equals(Object) |
判斷指定的物件是否等於目前的物件。Determines whether the specified object is equal to the current object. (繼承來源 Object) |
GetHashCode() |
做為預設雜湊函式。Serves as the default hash function. (繼承來源 Object) |
GetLifetimeService() |
已過時。
擷取控制這個執行個體存留期 (Lifetime) 原則的目前存留期服務物件。Retrieves the current lifetime service object that controls the lifetime policy for this instance. (繼承來源 MarshalByRefObject) |
GetService(Type) |
傳回表示 Component 或其 Container 所提供之服務的物件。Returns an object that represents a service provided by the Component or by its Container. (繼承來源 Component) |
GetType() |
取得目前執行個體的 Type。Gets the Type of the current instance. (繼承來源 Object) |
InitializeLifetimeService() |
已過時。
取得存留期服務物件,以控制這個執行個體的存留期原則。Obtains a lifetime service object to control the lifetime policy for this instance. (繼承來源 MarshalByRefObject) |
MemberwiseClone() |
建立目前 Object 的淺層複製。Creates a shallow copy of the current Object. (繼承來源 Object) |
MemberwiseClone(Boolean) |
建立目前 MarshalByRefObject 物件的淺層複本。Creates a shallow copy of the current MarshalByRefObject object. (繼承來源 MarshalByRefObject) |
ToString() |
傳回表示目前 ImageList 的字串。Returns a string that represents the current ImageList. |
事件
Disposed |
當 Dispose() 方法的呼叫處置元件時,就會發生。Occurs when the component is disposed by a call to the Dispose() method. (繼承來源 Component) |
RecreateHandle |