A selection filter can contain filtering criteria for more than just one property or object. You define the total number of conditions to filter on by declaring an array containing enough elements to represent each of the filter criterion.
Select objects that meet two criterion
The following example specifies two criterion to filter selected objects by: the object must be a circle and it must reside on layer 0.
VB.NET
Imports Autodesk.AutoCAD.Runtime
Imports Autodesk.AutoCAD.ApplicationServices
Imports Autodesk.AutoCAD.DatabaseServices
Imports Autodesk.AutoCAD.EditorInput
<CommandMethod("FilterBlueCircleOnLayer0")> _
Public Sub FilterBlueCircleOnLayer0()
'' Get the current document editor
Dim acDocEd As Editor = Application.DocumentManager.MdiActiveDocument.Editor
'' Create a TypedValue array to define the filter criteria
Dim acTypValAr(2) As TypedValue
acTypValAr.SetValue(New TypedValue(DxfCode.Color, 5), 0)
acTypValAr.SetValue(New TypedValue(DxfCode.Start, "CIRCLE"), 1)
acTypValAr.SetValue(New TypedValue(DxfCode.LayerName, "0"), 2)
'' Assign the filter criteria to a SelectionFilter object
Dim acSelFtr As SelectionFilter = New SelectionFilter(acTypValAr)
'' Request for objects to be selected in the drawing area
Dim acSSPrompt As PromptSelectionResult
acSSPrompt = acDocEd.GetSelection(acSelFtr)
'' If the prompt status is OK, objects were selected
If acSSPrompt.Status = PromptStatus.OK Then
Dim acSSet As SelectionSet = acSSPrompt.Value
Application.ShowAlertDialog("Number of objects selected: " & _
acSSet.Count.ToString())
Else
Application.ShowAlertDialog("Number of objects selected: 0")
End If
End Sub
C#
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
[CommandMethod("FilterBlueCircleOnLayer0")]
public static void FilterBlueCircleOnLayer0()
{
// Get the current document editor
Editor acDocEd = Application.DocumentManager.MdiActiveDocument.Editor;
// Create a TypedValue array to define the filter criteria
TypedValue[] acTypValAr = new TypedValue[3];
acTypValAr.SetValue(new TypedValue((int)DxfCode.Color, 5), 0);
acTypValAr.SetValue(new TypedValue((int)DxfCode.Start, "CIRCLE"), 1);
acTypValAr.SetValue(new TypedValue((int)DxfCode.LayerName, "0"), 2);
// Assign the filter criteria to a SelectionFilter object
SelectionFilter acSelFtr = new SelectionFilter(acTypValAr);
// Request for objects to be selected in the drawing area
PromptSelectionResult acSSPrompt;
acSSPrompt = acDocEd.GetSelection(acSelFtr);
// If the prompt status is OK, objects were selected
if (acSSPrompt.Status == PromptStatus.OK)
{
SelectionSet acSSet = acSSPrompt.Value;
Application.ShowAlertDialog("Number of objects selected: " +
acSSet.Count.ToString());
}
else
{
Application.ShowAlertDialog("Number of objects selected: 0");
}
}
