Latest Contributions by AlexanderGray

I had this conversation, I think it was version 8.1 something, apparently ArcMap keeps a reference to the featureclass so it can re-add it faster if you chose undo... Have you tried the com releaser on the featurelayer.featureclass? ... View more

http://help.arcgis.com/en/arcgisserver/10.0/help/arcgis_server_dotnet_help/index.html#/Oracle_initialization_parameters/002n00000003000000/ ... View more

This is an oracle problem, not a code problem.  By default I think Oracle has 50 or so maximum cursors (not sure the exact number but it is low.)  Now most applications use a 1 to 5 cursors so that is ok.  ArcGIS uses much much more, I believe the recommended max is like 10 000 for an SDE database. ... View more

Yes the whole keyboard events in controls is a bit of a mess.  I get that problem with a windows control too.  I did something like this in the windows control.  Basically create my own handlers.  I don't have list boxes but I think that is just the up and down keys. Public Sub Initialize()        WorkaroundTabIndexDefect() End Sub ''' <summary>   ''' Works around the tab index defect.   ''' </summary>   Private Sub WorkaroundTabIndexDefect()     For Each ctr As Control In Me.Controls            SetKeyDownHandlers(ctr)     Next   End Sub   ''' <summary>   ''' Sets the key down handlers.   ''' </summary>   ''' <param name="ctr">The CTR.</param>   Private Sub SetKeyDownHandlers(ByVal ctr As Control)     Dim txtCtr As TextBox = TryCast(ctr, TextBox)     If txtCtr IsNot Nothing Then       txtCtr.AcceptsTab = True       txtCtr.AcceptsReturn = True       Dim evh As KeyEventHandler = New KeyEventHandler(AddressOf WorkaroundKeyDown)       AddHandler txtCtr.KeyDown, evh     Else       ctr.TabStop = False     End If     If ctr.Controls.Count > 0 Then       For Each subCtr As Control In ctr.Controls         SetKeyDownHandlers(subCtr)       Next     End If   End Sub   ''' <summary>   ''' Workarounds the key down.   ''' </summary>   ''' <param name="sender">The sender.</param>   ''' <param name="e">The <see cref="System.Windows.Forms.KeyEventArgs" /> instance containing the event data.</param>   Private Sub WorkaroundKeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs)     Try       If Me.ActiveControl IsNot Nothing Then         Select Case e.KeyCode           Case Keys.Return             Dim btnCtr As Windows.Forms.Button = TryCast(Me.ActiveControl, Windows.Forms.Button)             If btnCtr IsNot Nothing Then               btnCtr.PerformClick()             End If           Case Keys.Tab             If e.Shift Then               Me.SelectNextControl(CType(sender, Control), False, True, True, True)             Else               Me.SelectNextControl(CType(sender, Control), True, True, True, True)             End If         End Select       End If     Catch ex As Exception       Trace.WriteLine(ex)     End Try   End Sub ... View more

I suggest you try using the COMReleaser to explicitly release the resource from either the layer or the featureclass that is the layer source. ... View more

callout margins can be set in the ArcMap GUI for the background properties so it should be doable in code.  ITextMargins has a getMargins and putMargins.  I have never used it but my bet would be to start there. ... View more

With a TextElement, the only way I know to set the background color is to set the background to a balloon callout. But this has some likely unwanted callout features. Probably best to use ParagraphTextElement, which gives you control over background, outline, etc. There is a sample of how to use it in the thread: Paragraph text in Pagelayout You can get around the balloon callout problems by setting the leader tolerance to the maximum, 32767.  A bit of a hack but it works.  Marker text background can work also depending on the needs and the properties. Another solution is to create a group element with a text element and a polygon or rectangle element grouped together. ... View more

Windows user name is fine if you are using OS authentication in your connection.  If not, this won't tell you what user is connected to the database. ... View more

I too have this problem.  There is the isbeingedited property on the iworkspaceedit, however, this only returns true if the process in which it is called is the one edited.  In my case I had a file geodatabase, where the same user could be editing it from two different processes (.exe)  The only way I found was to check for the presence of edit locks in the file geodatabase folder (*.ed.lock.)  Does anyone have a better way? ... View more

I like the new docking of windows.  Auto-hide, stacking, visual cues to show where you are docking too, way better than the randomness-fest of docking before.  You would move a window hoping it would dock to right thing and it would do something completely different.  Old docking was the pits. So here is a better idea, make the toolbars dockable windows, that way you could dock them to the map or another dockable window  or stack it with tabs and it could have auto-hide too. ... View more

You may have more that one connection in your map for different layers.  Find the layer you want, get its featureclass, from that get its workspace (from Idataset), cast workspace to IDatabaseConnectionInfo2. ... View more

I had asked ESRI what their stance was in supporting WPF in ArcGIS at the UC last year, they told me it was supported using a windows forms WPF container control.  So you would still need a windows custom control that would have a WPF container control on it.  Not sure how that is going to work in a property page.  It should work but I would be cautious with event handling, specifically key press events.   I not sure how well the events pass through ArcMap to windows forms to WPF.  Alternatively you might be able to create a custom control by inheriting from the WPF container control and implementing the IComPropertyPage interface on it and put the COM visible attributes and the registration stuff too. ... View more

Error 0x80040228 is usually related to the license not being initialized.  Are you sure the license is activated? http://forums.esri.com/Thread.asp?c=159&f=1707&t=200073 http://forums.esri.com/Thread.asp?c=2&f=1720&t=237013 Can you specify which version of ArcGIS you have (licensing has changed is 10)? Can you specify the product installed?  Engine, desktop etc? Can you specify the type of project, exe, add-in, dll customization? Can you post the code that activates the license?  and the return values from the activation? Can you specify which license you are using (engine, viewer, editor, arcinfo...)? ... View more

Jihua, Component registration has changed at 10.  There are a few articles in the help about migrating your code to arcgis 10.  If you go to customize and add from file, can you select the tlb with the dll and load the command that way?  If so your command is fine, you just need to update the registration. http://help.arcgis.com/en/sdk/10.0/arcobjects_net/conceptualhelp/index.html#/Migrating_ArcGIS_9_3_Desktop_and_Engine_custom_components_to_ArcGIS_10/0001000002m2000000/ ... View more

If your code is meant to run from ArcMap and you try to start the form directly from visual studio (debug?), it will not work.  You need to pass in a valid reference when you create the form, VS cannot do this.  I suggest you change the debug properties of your start up project to start arcmap, then invoke the form through the command and check the values being passed in.  You can still set break points, step through the code, view values and edit the code when you start ArcMap in debug mode. ... View more