ImageList.ImageCollection Class
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
public: ref class ImageList::ImageCollection sealed : System::Collections::IListpublic sealed class ImageList.ImageCollection : System.Collections.IListtype ImageList.ImageCollection = class
interface IList
interface ICollection
interface IEnumerablePublic NotInheritable Class ImageList.ImageCollection
Implements IList- Inheritance
-
ImageList.ImageCollection
- Implements
Examples
The following code example shows how to select, remove, and display images, from the Images property of the ImageList class, which is an ImageList.ImageCollection type.
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)
{
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)
{
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
Remarks
This is used to manage the images in the ImageList programmatically, providing methods to add and remove image objects.
Properties
| Count |
Gets the number of images currently in the list. |
| Empty |
Gets a value indicating whether the ImageList has any images. |
| IsReadOnly |
Gets a value indicating whether the list is read-only. |
| Item[Int32] |
Gets or sets an Image at the specified index within the collection. |
| Item[String] |
Gets an Image with the specified key from the collection. |
| Keys |
Gets the collection of keys associated with the images in the ImageList.ImageCollection. |
Methods
| Add(Icon) |
Adds the specified icon to the ImageList. |
| Add(Image, Color) |
Adds the specified image to the ImageList, using the specified color to generate the mask. |
| Add(Image) |
Adds the specified image to the ImageList. |
| Add(String, Icon) |
Adds an icon with the specified key to the end of the collection. |
| Add(String, Image) |
Adds an image with the specified key to the end of the collection. |
| AddRange(Image[]) |
Adds an array of images to the collection. |
| AddStrip(Image) |
Adds an image strip for the specified image to the ImageList. |
| Clear() |
Removes all the images and masks from the ImageList. |
| Contains(Image) |
Not supported. The Contains(Object) method indicates whether a specified object is contained in the list. |
| ContainsKey(String) |
Determines if the collection contains an image with the specified key. |
| Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
| GetEnumerator() |
Returns an enumerator that can be used to iterate through the item collection. |
| GetHashCode() |
Serves as the default hash function. (Inherited from Object) |
| GetType() |
Gets the Type of the current instance. (Inherited from Object) |
| IndexOf(Image) |
Not supported. The IndexOf(Object) method returns the index of a specified object in the list. |
| IndexOfKey(String) |
Determines the index of the first occurrence of an image with the specified key in the collection. |
| MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
| Remove(Image) |
Not supported. The Remove(Object) method removes a specified object from the list. |
| RemoveAt(Int32) |
Removes an image from the list. |
| RemoveByKey(String) |
Removes the image with the specified key from the collection. |
| SetKeyName(Int32, String) |
Sets the key for an image in the collection. |
| ToString() |
Returns a string that represents the current object. (Inherited from Object) |
Explicit Interface Implementations
| ICollection.CopyTo(Array, Int32) |
Copies the items in this collection to a compatible one-dimensional array, starting at the specified index of the target array. |
| ICollection.IsSynchronized |
Gets a value indicating whether access to the collection is synchronized (thread safe). |
| ICollection.SyncRoot |
Gets an object that can be used to synchronize access to the collection. |
| IList.Add(Object) |
Adds the specified image to the ImageList. |
| IList.Contains(Object) |
This API supports the product infrastructure and is not intended to be used directly from your code. Implements the Contains(Object) method. Throws a NotSupportedException in all cases. |
| IList.IndexOf(Object) |
This API supports the product infrastructure and is not intended to be used directly from your code. Implements the IndexOf(Object) method. Throws a NotSupportedException in all cases. |
| IList.Insert(Int32, Object) |
Implements the Insert(Int32, Object) method. Throws a NotSupportedException in all cases. |
| IList.IsFixedSize |
Gets a value indicating whether the ImageList.ImageCollection has a fixed size. |
| IList.Item[Int32] |
Gets or sets an image in an existing ImageList.ImageCollection. |
| IList.Remove(Object) |
Implements the Remove(Object). Throws a NotSupportedException in all cases. |
Extension Methods
| Cast<TResult>(IEnumerable) |
Casts the elements of an IEnumerable to the specified type. |
| OfType<TResult>(IEnumerable) |
Filters the elements of an IEnumerable based on a specified type. |
| AsParallel(IEnumerable) |
Enables parallelization of a query. |
| AsQueryable(IEnumerable) |
Converts an IEnumerable to an IQueryable. |
Applies to
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