Dear helpers.
I would like to built an application with Erase and Clip (I use ArcEngine with Vb.net). I try some code and my code can CLip but can not Erase, I don't know why.
Would you please help me to correct code and explain me why?
Thank you very much for helping.
Following are my codes. (I have attached data files)
'=====================================================
Imports System.IO
Imports ESRI.ArcGIS.esriSystem
Imports ESRI.ArcGIS.Carto
Imports ESRI.ArcGIS.Controls
Imports ESRI.ArcGIS.ADF
Imports ESRI.ArcGIS.output
Imports ESRI.ArcGIS.SystemUI
Imports ESRI.ArcGIS.Geodatabase
'Imports ESRI.ArcGIS.Geoprocessing
Imports ESRI.ArcGIS.Geoprocessor
Imports ESRI.ArcGIS.AnalysisTools
Public Class MainForm
Private Sub Button9_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button9.Click
'==='Cliping===
Dim ClipTool As ESRI.ArcGIS.AnalysisTools.Clip = New ESRI.ArcGIS.AnalysisTools.Clip()
ClipTool.in_features = "E:\Temp\Road.shp" 'axMapControl1.Map.Layer(0)
ClipTool.clip_features = "E:\Temp\Boundary.shp" 'axMapControl1.Map.Layer(1)
ClipTool.out_feature_class = "E:\Temp\clip_out.shp"
Dim gp_clip As Geoprocessor = New Geoprocessor
Dim resultsClip As ESRI.ArcGIS.Geoprocessing.IGeoProcessorResult = CType(gp_clip.Execute(ClipTool, Nothing), ESRI.ArcGIS.Geoprocessing.IGeoProcessorResult)
'''''=>> ResultsCLip is a System.___Object
'==='Earasing===
Dim EraseTool As ESRI.ArcGIS.AnalysisTools.Erase = New ESRI.ArcGIS.AnalysisTools.Erase
EraseTool.in_features = "E:\Temp\Road.shp" ' axMapControl1.Map.Layer(0)
EraseTool.erase_features = "E:\Temp\Boundary.shp" 'axMapControl1.Map.Layer(1)
EraseTool.out_feature_class = "E:\Temp\Erase_out.shp"
Dim gp_Erase As Geoprocessor = New Geoprocessor
Dim resultsErase As ESRI.ArcGIS.Geoprocessing.IGeoProcessorResult = CType(gp_Erase.Execute(EraseTool, Nothing), ESRI.ArcGIS.Geoprocessing.IGeoProcessorResult)
'''''=>> ResultsErase is Nothing....Please why???
End Sub
End Class
'==============
Ngo T
GIS for Sustainable Development,
Hanoi, Vietnam
