Latest Contributions by LiYao

Dear all, I met a strange thing when I am trying to update value in attribute table. I am in editing session and after I perform feature.store and open the attribute table, there is no record in the attribute table. When I exit editing session, the records return, but the value not updated. My code is as follows:         pActiveView = pMxDoc.FocusMap         pMxDoc = My.ArcMap.Application.Document         pMap = pMxDoc.FocusMap         Dim layerNum = GetIndexNumberFromLayerName(pActiveView, "proj_db.DBO.Line")         Dim pFLayer As IFeatureLayer         pFLayer = pMap.Layer(layerNum)         Dim featureClass As ESRI.ArcGIS.Geodatabase.IFeatureClass = pFLayer.FeatureClass         If featureClass is DbNull.value then               Return         End If         Dim feature as IFeature = pFLayer.FeatureClass.GetFeature(maxOBJECID)         If feature is DbNull.value then           Return         End If         Dim nameFieldIndex As Integer = pFLayer.FindField("Seg_ID")         feature.Value(nameFieldIndex) = inputSegID         feature.Store() There no error also. Don't know what is up in my code, please help me on it, thank you very much! I am using arcobjects 10.2.2. ... View more

Dear all, I am using vb.net arcobjects to run "intersect" GeoProcessing tool, but get "Object reference not set to an instance of an object" error. My code is as follows:             Dim objGP As IGeoProcessor = New GeoProcessor             Dim InputLayer = "dev_db.DBO.Segment;dev_db.DBO.LINE_1"             Dim output = "D:\dev\Seg_line_intersect"             objGP.OverwriteOutput = True             Dim objParameters = New VarArray             objParameters.Add(InputLayer)             objParameters.Add(output)             Dim objResult As IGeoProcessorResult = objGP.Execute("Intersect_Analysis", objParameters, Nothing) The error is: There are selected features in the segment layer. I am using arcmap 10.2.2. I failed to find what's wrong with my code, please kindly advice on it, thanks a lot. ... View more

Hello everybody, I am using Get Selected Feature Layer In Contents View by following the sample code from ESRI: ArcObjects 10 .NET SDK Help But sometimes there is no layer selected, which cause error in the application. I tried to find the way to select a layer through arcobjects (as in the following picture), but no luck. Anybody has any advice on this? I am using arcmap and arcobjects 10.2.2 and vb.net arcmap add-in. Thanks in advance. ... View more