Hello. I have code that loops through selected features and updates an attribute for those features. The code throws an error at runtime when the featureclass is a polyline type which participates in a topology class. The error seems to happen at iSelectionset.Update. Below is the entire function. Any ideas would be appreciated. Private Sub txtRFrom_KeyPress(sender As Object, e As KeyPressEventArgs) Handles txtRFrom.KeyPress If Asc(e.KeyChar) = 13 Or Asc(e.KeyChar) = 9 Then If cmbLayer.SelectedIndex = -1 Then MsgBox("Please Select an Edit Layer!!") Exit Sub End If Dim intValue As Integer If Not Integer.TryParse(txtRFrom.Text, intValue) Then txtRTo.Focus() Exit Sub End If Dim pfLayer As IFeatureLayer pfLayer = FindLayerByName(cmbLayer.SelectedItem) Dim pfClass As IFeatureClass pfClass = pfLayer.FeatureClass Dim pfeatsel As IFeatureSelection pfeatsel = pfLayer Dim pSelectionSet As ISelectionSet2 pSelectionSet = pfeatsel.SelectionSet If pSelectionSet.Count = 0 Then MsgBox("No features selected!!") Exit Sub End If Dim pFeatureCursor As IFeatureCursor pFeatureCursor = Nothing Dim pFeature As IFeature 'update the selectionset setting the IQueryFilter object to Nothing pSelectionSet.Update(Nothing, False, pFeatureCursor) pFeature = pFeatureCursor.NextFeature Do Until pFeature Is Nothing pFeature.Value(pFeature.Fields.FindField("RFromAddr")) = txtRFrom.Text pFeatureCursor.UpdateFeature(pFeature) pFeature = pFeatureCursor.NextFeature txtRTo.Focus() Loop End If End Sub
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