ImageList Class
Provides methods to manage a collection of Image objects. This class cannot be inherited.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
System::MarshalByRefObject
System.ComponentModel::Component
System.Windows.Forms::ImageList
| Name | Description | |
|---|---|---|
![]() | ImageList() | Initializes a new instance of the ImageList class with default values for ColorDepth, ImageSize, and TransparentColor. |
![]() | ImageList(IContainer^) | Initializes a new instance of the ImageList class, associating it with a container. |
| Name | Description | |
|---|---|---|
![]() | ColorDepth | Gets the color depth of the image list. |
![]() | Container | Gets the IContainer that contains the Component.(Inherited from Component.) |
![]() | Handle | Gets the handle of the image list object. |
![]() | HandleCreated | Gets a value indicating whether the underlying Win32 handle has been created. |
![]() | Images | Gets the ImageList::ImageCollection for this image list. |
![]() | ImageSize | Gets or sets the size of the images in the image list. |
![]() | ImageStream | Gets the ImageListStreamer associated with this image list. |
![]() | Site | |
![]() | Tag | Gets or sets an object that contains additional data about the ImageList. |
![]() | TransparentColor | Gets or sets the color to treat as transparent. |
| Name | Description | |
|---|---|---|
![]() | CreateObjRef(Type^) | Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object.(Inherited from MarshalByRefObject.) |
![]() | Dispose() | |
![]() | Draw(Graphics^, Int32, Int32, Int32) | Draws the image indicated by the given index on the specified Graphics at the specified location. |
![]() | Draw(Graphics^, Int32, Int32, Int32, Int32, Int32) | Draws the image indicated by the given index on the specified Graphics using the specified location and size. |
![]() | Draw(Graphics^, Point, Int32) | Draws the image indicated by the specified index on the specified Graphics at the given location. |
![]() | Equals(Object^) | Determines whether the specified object is equal to the current object.(Inherited from Object.) |
![]() | GetHashCode() | Serves as the default hash function. (Inherited from Object.) |
![]() | GetLifetimeService() | Retrieves the current lifetime service object that controls the lifetime policy for this instance.(Inherited from MarshalByRefObject.) |
![]() | GetType() | |
![]() | InitializeLifetimeService() | Obtains a lifetime service object to control the lifetime policy for this instance.(Inherited from MarshalByRefObject.) |
![]() | ToString() | This API supports the product infrastructure and is not intended to be used directly from your code. Returns a string that represents the current ImageList.(Overrides Component::ToString().) |
| Name | Description | |
|---|---|---|
![]() | Disposed | |
![]() | RecreateHandle | Occurs when the Handle is recreated. |
ImageList is typically used by other controls, such as the ListView, TreeView, or ToolBar. You can add bitmaps or icons to the ImageList, and the other controls are able to use the images as they require.
ImageList uses a handle to manage the list of images. The Handle is not created until certain operations, such as getting the Handle or calling Draw, are performed on the image list. Performing other operations, such as setting the ColorDepth or ImageSize will cause the Handle to be recreated. Therefore, you should perform these operations before you add images to the ImageList. 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. Changing the form's language before you add images will corrupt the application resource files.
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); }
Available since 1.1
Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.


