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RasterCollection<T> Class

Summary

Represents a generic collection of objects.

Syntax

C++

[SerializableAttribute()] 
public class RasterCollection<_T_> : System.Collections.Generic.ICollection<T>, System.Collections.Generic.IEnumerable<T>, System.Collections.Generic.IList<T>, System.Collections.IEnumerable

<SerializableAttribute()> 
Public Class RasterCollection(Of T)  
   Implements System.Collections.Generic.ICollection(Of T), System.Collections.Generic.IEnumerable(Of T), System.Collections.Generic.IList(Of T), System.Collections.IEnumerable

[SerializableAttribute()] 
generic<typename T> 
public ref class RasterCollection : public System.Collections.Generic.ICollection<T>, System.Collections.Generic.IEnumerable<T>, System.Collections.Generic.IList<T>, System.Collections.IEnumerable

Type Parameters

T
A generic Type parameter.

Remarks

The RasterCollection\<T\> class provides a generic collection class that implements the .NET IList<T>, ICollection<T> and IEnumerable<T> interfaces.

The class contains the ItemAdded and ItemRemoved events. These events will fire whenever objects are added or removed to/from the collection.

Example

Sample to test the RasterCollection class.

Silverlight C#

Silverlight VB

using Leadtools; 
 
public void RasterCollectionExample() 
{ 
   RasterCollection<string> rc = new RasterCollection<string>(); 
   rc.ItemAdded += new EventHandler<RasterCollectionEventArgs<string>>(rasterCollection_ItemAdded); 
   rc.ItemRemoved += new EventHandler<RasterCollectionEventArgs<string>>(rasterCollection_ItemRemoved); 
 
   // add a few items 
   string item1 = "item 1"; 
   string item2 = "item 2"; 
   string item3 = "item 3"; 
 
   rc.Add(item1); 
   rc.Add(item2); 
   rc.Add(item3); 
 
   // insert an item 
   string newItem2 = "new item 2"; 
   rc.Insert(1, newItem2); 
 
   // check if collection contains this new item 
   Assert.IsTrue(rc.Contains(newItem2)); 
 
   // remove this new item 
   rc.Remove(newItem2); 
   Assert.IsTrue(!rc.Contains(newItem2)); 
 
   // remove the last item 
   rc.RemoveAt(rc.Count - 1); 
   Assert.IsTrue(rc.Count == 2); 
 
   // send the first item to the end of the collection 
   rc.SendToBack(item1, true); 
   Assert.IsTrue(rc.IndexOf(item1) == rc.Count - 1); 
 
   // bring it back to the front 
   rc.BringToFront(item1, true); 
   Assert.IsTrue(rc.IndexOf(item1) == 0); 
 
   // copy to an array 
   string[] items = new string[rc.Count]; 
   rc.CopyTo(items, 0); 
   Assert.IsTrue(items.Length == rc.Count); 
   for (int i = 0; i < items.Length; i++) 
      Assert.IsTrue(items[i] == rc[i]); 
 
   // loop throw the items and show them 
   foreach (string str in rc) 
      Console.WriteLine(str); 
 
   // clean the collection 
   rc.Clear(); 
   Assert.IsTrue(rc.Count == 0); 
} 
 
private void rasterCollection_ItemAdded(System.Object sender, RasterCollectionEventArgs<string> e) 
{ 
   Console.WriteLine("The Item ((" + e.Item.ToString() + ")) Has been added to the collection"); 
} 
 
private void rasterCollection_ItemRemoved(System.Object sender, RasterCollectionEventArgs<string> e) 
{ 
   Console.WriteLine("The Item ((" + e.Item.ToString() + ")) Has been removed from the collection"); 
}

Imports Leadtools 
 
Public Sub RasterCollectionExample() 
   Dim rc As RasterCollection(Of String) = New RasterCollection(Of String)() 
   AddHandler rc.ItemAdded, AddressOf rasterCollection_ItemAdded 
   AddHandler rc.ItemRemoved, AddressOf rasterCollection_ItemRemoved 
 
   ' add a few items 
   Dim item1 As String = "item 1" 
   Dim item2 As String = "item 2" 
   Dim item3 As String = "item 3" 
 
   rc.Add(item1) 
   rc.Add(item2) 
   rc.Add(item3) 
 
   ' insert an item 
   Dim newItem2 As String = "new item 2" 
   rc.Insert(1, newItem2) 
 
   ' check if collection contains this new item 
   Debug.Assert(rc.Contains(newItem2)) 
 
   ' remove this new item 
   rc.Remove(newItem2) 
   Debug.Assert((Not rc.Contains(newItem2))) 
 
   ' remove the last item 
   rc.RemoveAt(rc.Count - 1) 
   Debug.Assert(rc.Count = 2) 
 
   ' send the first item to the end of the collection 
   rc.SendToBack(item1, True) 
   Debug.Assert(rc.IndexOf(item1) = rc.Count - 1) 
 
   ' bring it back to the front 
   rc.BringToFront(item1, True) 
   Debug.Assert(rc.IndexOf(item1) = 0) 
 
   ' copy to an array 
   Dim items As String() = New String(rc.Count - 1) {} 
   rc.CopyTo(items, 0) 
   Debug.Assert(items.Length = rc.Count) 
   Dim i As Integer = 0 
   Do While i < items.Length 
      Debug.Assert(items(i) = rc(i)) 
      i += 1 
   Loop 
 
   ' loop throw the items and show them 
   For Each str As String In rc 
      Console.WriteLine(str) 
   Next str 
 
   ' clean the collection 
   rc.Clear() 
   Debug.Assert(rc.Count = 0) 
End Sub 
 
Private Sub rasterCollection_ItemAdded(ByVal sender As System.Object, ByVal e As RasterCollectionEventArgs(Of String)) 
   Console.WriteLine("The Item ((" & e.Item.ToString() & ")) Has been added to the collection") 
End Sub 
 
Private Sub rasterCollection_ItemRemoved(ByVal sender As System.Object, ByVal e As RasterCollectionEventArgs(Of String)) 
   Console.WriteLine("The Item ((" & e.Item.ToString() & ")) Has been removed from the collection") 
End Sub

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Examples; 
 
public void RasterCollectionExample() 
{ 
   RasterCollection<string> rc = new RasterCollection<string>(); 
   rc.ItemAdded += new EventHandler<RasterCollectionEventArgs<string>>(rasterCollection_ItemAdded); 
   rc.ItemRemoved += new EventHandler<RasterCollectionEventArgs<string>>(rasterCollection_ItemRemoved); 
 
   // add a few items 
   string item1 = "item 1"; 
   string item2 = "item 2"; 
   string item3 = "item 3"; 
 
   rc.Add(item1); 
   rc.Add(item2); 
   rc.Add(item3); 
 
   // insert an item 
   string newItem2 = "new item 2"; 
   rc.Insert(1, newItem2); 
 
   // check if collection contains this new item 
   Debug.Assert(rc.Contains(newItem2)); 
 
   // remove this new item 
   rc.Remove(newItem2); 
   Debug.Assert(!rc.Contains(newItem2)); 
 
   // remove the last item 
   rc.RemoveAt(rc.Count - 1); 
   Debug.Assert(rc.Count == 2); 
 
   // send the first item to the end of the collection 
   rc.SendToBack(item1, true); 
   Debug.Assert(rc.IndexOf(item1) == rc.Count - 1); 
 
   // bring it back to the front 
   rc.BringToFront(item1, true); 
   Debug.Assert(rc.IndexOf(item1) == 0); 
 
   // copy to an array 
   string[] items = new string[rc.Count]; 
   rc.CopyTo(items, 0); 
   Debug.Assert(items.Length == rc.Count); 
   for (int i = 0; i < items.Length; i++) 
      Debug.Assert(items[i] == rc[i]); 
 
   // loop throw the items and show them 
   foreach (string str in rc) 
      Console.WriteLine(str); 
 
   // clean the collection 
   rc.Clear(); 
   Debug.Assert(rc.Count == 0); 
} 
 
private void rasterCollection_ItemAdded(System.Object sender, RasterCollectionEventArgs<string> e) 
{ 
   Console.WriteLine("The Item ((" + e.Item.ToString() + ")) Has been added to the collection"); 
} 
 
private void rasterCollection_ItemRemoved(System.Object sender, RasterCollectionEventArgs<string> e) 
{ 
   Console.WriteLine("The Item ((" + e.Item.ToString() + ")) Has been removed from the collection"); 
}

Imports Leadtools 
Imports Leadtools.Codecs 
 
Public Sub RasterCollectionExample() 
   Dim rc As RasterCollection(Of String) = New RasterCollection(Of String)() 
   AddHandler rc.ItemAdded, AddressOf rasterCollection_ItemAdded 
   AddHandler rc.ItemRemoved, AddressOf rasterCollection_ItemRemoved 
 
   ' add a few items 
   Dim item1 As String = "item 1" 
   Dim item2 As String = "item 2" 
   Dim item3 As String = "item 3" 
 
   rc.Add(item1) 
   rc.Add(item2) 
   rc.Add(item3) 
 
   ' insert an item 
   Dim newItem2 As String = "new item 2" 
   rc.Insert(1, newItem2) 
 
   ' check if collection contains this new item 
   Debug.Assert(rc.Contains(newItem2)) 
 
   ' remove this new item 
   rc.Remove(newItem2) 
   Debug.Assert((Not rc.Contains(newItem2))) 
 
   ' remove the last item 
   rc.RemoveAt(rc.Count - 1) 
   Debug.Assert(rc.Count = 2) 
 
   ' send the first item to the end of the collection 
   rc.SendToBack(item1, True) 
   Debug.Assert(rc.IndexOf(item1) = rc.Count - 1) 
 
   ' bring it back to the front 
   rc.BringToFront(item1, True) 
   Debug.Assert(rc.IndexOf(item1) = 0) 
 
   ' copy to an array 
   Dim items As String() = New String(rc.Count - 1) {} 
   rc.CopyTo(items, 0) 
   Debug.Assert(items.Length = rc.Count) 
   Dim i As Integer = 0 
   Do While i < items.Length 
      Debug.Assert(items(i) = rc(i)) 
      i += 1 
   Loop 
 
   ' loop throw the items and show them 
   For Each str As String In rc 
      Console.WriteLine(str) 
   Next str 
 
   ' clean the collection 
   rc.Clear() 
   Debug.Assert(rc.Count = 0) 
End Sub 
 
Private Sub rasterCollection_ItemAdded(ByVal sender As System.Object, ByVal e As RasterCollectionEventArgs(Of String)) 
   Console.WriteLine("The Item ((" & e.Item.ToString() & ")) Has been added to the collection") 
End Sub 
 
Private Sub rasterCollection_ItemRemoved(ByVal sender As System.Object, ByVal e As RasterCollectionEventArgs(Of String)) 
   Console.WriteLine("The Item ((" & e.Item.ToString() & ")) Has been removed from the collection") 
End Sub