Leadtools.WinForms Namespace > RasterImageList Class : Sorter Property |
[BrowsableAttribute(false)] public IComparer Sorter {get; set;}
'Declaration <BrowsableAttribute(False)> Public Property Sorter As IComparer
'Usage Dim instance As RasterImageList Dim value As IComparer instance.Sorter = value value = instance.Sorter
[BrowsableAttribute(false)] public: property IComparer^ Sorter { IComparer^ get(); void set ( IComparer^ value); }
The Sorter property allows you to specify the object that performs the sorting of items in the RasterImageList. You can use the Sorter property in combination with the Sort method to perform custom sorting. For example, you could create a class (that implements the System.Collections.IComparer interface) to support custom sorting in the RasterImageList control.
To control the sort order, use the Sorting property.
By default the Sorting algorithm sorts items alphabetically based on the Text property of each list item.
Set the Sorter property to null (Nothing in Visual Basic) to fall back to the default sorter.
Note: Setting the value of the Sorter property causes the Sort method to be called automatically.
Imports Leadtools.WinForms Imports Leadtools Imports Leadtools.Codecs Imports Leadtools.Drawing Public Sub RasterImageList_Sorter(ByVal imageList As RasterImageList) imageList.Bounds = New Rectangle(New Point(10, 10), New Size(400, 400)) ' Sort the items in the list in ascending order. imageList.Sorting = SortOrder.Ascending ' Use normal view style imageList.ViewStyle = RasterImageListViewStyle.Normal ' Suspend painting the RasterImageList imageList.BeginUpdate() ' Clear the image list imageList.Items.Clear() ' Add 20 items For i As Integer = 0 To 19 ' Use the item index as its text Dim item As RasterImageListItem = New RasterImageListItem(Nothing, i, i.ToString()) imageList.Items.Add(item) Next i ' Resume painting imageList.EndUpdate() ' Sort using the default sorter imageList.Sort() MessageBox.Show("Default sort (0, 1, 10, 11, etc...)") ' Setup custom sorting imageList.Sorter = New MyRasterImageListItemComparer() MessageBox.Show("Custom sort (0, 1, 2, 3, etc... ") End Sub <DllImport("SHLWAPI.DLL", EntryPoint:="StrCmpLogicalW", SetLastError:=True, CharSet:=CharSet.Unicode, ExactSpelling:=True, _ CallingConvention:=CallingConvention.StdCall)> _ Public Shared Function StrCmpLogicalW(ByVal psz1 As String, ByVal psz2 As String) As Integer End Function Private Class MyRasterImageListItemComparer : Implements IComparer Public Sub New() End Sub Public Function Compare(ByVal x As Object, ByVal y As Object) As Integer Implements IComparer.Compare Dim itemX As RasterImageListItem = CType(IIf(TypeOf x Is RasterImageListItem, x, Nothing), RasterImageListItem) Dim itemY As RasterImageListItem = CType(IIf(TypeOf y Is RasterImageListItem, y, Nothing), RasterImageListItem) Return StrCmpLogicalW(itemX.Text, itemY.Text) End Function End Class
using Leadtools.WinForms; using Leadtools; using Leadtools.Codecs; using Leadtools.Drawing; public void RasterImageList_Sorter(RasterImageList imageList) { imageList.Bounds = new Rectangle(new Point(10, 10), new Size(400, 400)); // Sort the items in the list in ascending order. imageList.Sorting = SortOrder.Ascending; // Use normal view style imageList.ViewStyle = RasterImageListViewStyle.Normal; // Suspend painting the RasterImageList imageList.BeginUpdate(); // Clear the image list imageList.Items.Clear(); // Add 20 items for(int i = 0; i < 20; i++) { // Use the item index as its text RasterImageListItem item = new RasterImageListItem(null, i, i.ToString()); imageList.Items.Add(item); } // Resume painting imageList.EndUpdate(); // Sort using the default sorter imageList.Sort(); MessageBox.Show("Default sort (0, 1, 10, 11, etc...)"); // Setup custom sorting imageList.Sorter = new MyRasterImageListItemComparer(); MessageBox.Show("Custom sort (0, 1, 2, 3, etc... "); } [DllImport("SHLWAPI.DLL", EntryPoint = "StrCmpLogicalW", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern int StrCmpLogicalW(string psz1, string psz2); class MyRasterImageListItemComparer : IComparer { public MyRasterImageListItemComparer() { } public int Compare(object x, object y) { RasterImageListItem itemX = x as RasterImageListItem; RasterImageListItem itemY = y as RasterImageListItem; return StrCmpLogicalW(itemX.Text, itemY.Text); } }