Treeview SelectedNode changes randomly

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- Previous
  - 1
    - Manage application (maximize/minimize/restore...) Hi. I need change the state (maximize/minimize/restore...) of an application acording to some events. How can make an application minimize or maximize itself. note: my app have a NotifyIcon with the ShowInTaskbar property in false, I want when I click on some menu item (in the NotifyIcon), the application maximize or minimize.. thanks Tag: Treeview SelectedNode changes randomly Tag: 84271
  - 2
    - Docked Panel and runtime formborder change Basically i have a docked panel on the right side of my form(with a splitter), but when i change the formborder to none and while the windowstate is maximized the panel no longer fills the entire right side of the form. I've tried to refresh the panel, refresh the form, set dock to none then back the right, strangely when I show the folderbrowserdialog it properly redocks. If I set the windowstate to normal, then border to none, then maximized the panel will then dock properly, but it looks horrible on the user side. I would just write my own docking code, but the splitter needs the panel to be docked. Tag: Treeview SelectedNode changes randomly Tag: 84267
  - 3
    - When does a message processing thread get created for for Windows Form I have a Class Library that contains a Form and several helper classes. A thread gets created that performs processing of data behind the scenes and the Form never gets displayed (it is for debug puposes only and is not normally visable to the user.) The Thread function is actually in the Form class. Now.. What I am seeing is that when I create an instance of this Class Library's Form, which starts the worker thread, it seems to hose up the displaying of the Form (it sees to be locked up) unless I place a Application.DoEvents() call inside my worker threads function. What this seems to tell me is that the thread I have created is blocking the redrawing of the Form.. which doesnt make sense to me at all. I have tried several ways to "resolve" this and here is what I have seen so far: 1. DoEvents() in the Thread function seems to allow the Form to work correctly. 2. Calling Show() and then Hide() of the Form before I start my worker thread seems to allow me to then show and hide the Form later without any problems. 3. If I do not show it and do not call DoEvents() then the Form does not update when I perform a Show() later. Any thoughts? I am almost thinking that the Form is not creating it's own internal Message Handling thread until it is actually Show()'n and then when it does it sees that I have a worker thread and attaches to it? Sounds strange to me but that is what it looks like?? Any help would be appreciated.. You can email me at ElSeeker@hotmail.com with any info you have.. I may not have access to this group later..... Thx. Tag: Treeview SelectedNode changes randomly Tag: 84266
  - 4
    - disable dropdown in combobox can someone tell me how to disable the dropdown in a comboxbox?? -- Message posted via http://www.dotnetmonster.com Tag: Treeview SelectedNode changes randomly Tag: 84265
  - 5
    - Creditwrench And the truth shall set ye free http://www.creditwrench-thetruth.blogspot.com/ Uncle Normie Tag: Treeview SelectedNode changes randomly Tag: 84264
  - 6
    - how to make the toolbox in VS ide dear all, i found that the toolbox, properties column, help...etc are hide and slide out automatically and are neatly located as a tab-like at both left and right hand side of the VS IDE application. I am wondering how to make this controls? Also, the collapsible panel bars icons appeared in outlook is very good for use, do anyone can tell me how to make them? thanks a lots! kenton Tag: Treeview SelectedNode changes randomly Tag: 84254
  - 7
    - Editable expression columns I know that I can add a column onto a datatable, with a value of Confirm, by.... dt.Columns.Add("Confirm", Type.GetType("System.String"), "'Confirm'") ... but what if I just want to make that a default value that can then be edited. If I try dt.columns("Confirm").readonly=false then I'm told that I can't do that with an expression column. I also know that I can just add the column without the expression and then loop through the rows setting the value... but that seems very inefficient. Is there a better way of specifying an expression for a column that will just act as an editable default value? Thanks. Tag: Treeview SelectedNode changes randomly Tag: 84253
  - 8
    - paint type program's canvas I'm working on a sort of paint program that has the usual canvas pane in the middle of the main form. I'm working on that class and have a couple quick questions.. actually more like I'm looking for opinions. 1) I want a ruler running along from top left to top right and from top left to bottom left. I want to use a skinny UserControl or something that runs the respective length. I could simply track the mouse and draw the little line on it. Is there a better control to use? 2) There are a few different ways to render the actual images themselves (this app will allow the images to be modified while on the canvas) but does anyone here have any experience going through the effort of using one method over the other? I could use regular drawing APIs since the real cpu intensive work here isn't just displaying but rendering the changes to a buffer and then displaying it. I could use System.Drawing (which is based on GDI+ I think) or DirectX or ? Thanks for any help on this. There are obvious ways to do these things but I'm wondering if there are any absolute correct ways, specifically on the canvas drawing. Thanks again for any input, ~billy Tag: Treeview SelectedNode changes randomly Tag: 84252
  - 9
    - Handling the message pump for a UserControl Hi, Im wondering how a UserControl can be created using native win32 code. The reason for doing this is that i need to have access to the message pump and a way to render to it in the fastest possible way using managed DX. The "UserControl" will be hosted in a IE browser. Cheers, Tag: Treeview SelectedNode changes randomly Tag: 84249
  - 10
    - Play video formats inside a vb.net application I am curious about ways to play a vido inside a vb.net application. Are there controls for this purpose or some classes in Net which allow this. I am not talking about creating a video, just something that can take the file and play it inside my application. Thanks, Fred Herring Tag: Treeview SelectedNode changes randomly Tag: 84247
  - 11
    - SQL Query - Ok its from a windows app I think I need a nested query but here's the problem. I promise i've exerted my meager brain power on this problem & ask this as a last resot! 3 Tables PatientTable PatActive, PatID ProfileTable PatID, CodeID, OtherInfo, MedicineID MedicineTable MedicineID MedicineInfo I need a return from Table2 Info including the detailed child data from Table3 [OtherInfo] where patient is active, however i only want rows from Profile table where the element CodeID is MAX for each patient. subquery is fine SELECT MAX(ProfileTab.CodeID) AS CodeID , patienttable.patsurname FROM (profileTable INNER JOIN patienttable ON profiletable.PatID= patienttable.PatID) GROUP BY patienttable.patsurname HAVING (patienttable.patactive = 1) I had to add the Group by statement when I tried to add this into another query. I dont have direct access to the DB so cannot use stored queries. *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for it! Tag: Treeview SelectedNode changes randomly Tag: 84240
  - 12
    - TreeView control; checkboxes for only few nodes, is it possible ? Hi! I am trying to create checkboxes for some nodes of my TreeView control and not for the other. I can not see anything on the Nodes level. I can only set the checkboxes = true on the top parent level. Is it possible to do with MS TreeView control that ships with VS.NET 2003 ? Is there anything on the market that can help me ? Many Thanks in Advance, --Mike Tag: Treeview SelectedNode changes randomly Tag: 84238
  - 13
    - How to pass an EventArgs to OnClick upon clicking a control Hi all, When you click a control, OnClick is called which in turn calls the Click event. OnClick takes as an argument an object of type EventArgs which it then passes to Click. However, the default behavior is that the EventArgs that is sent is an empty one. I want to pass in some values in my EventArgs when the user clicks my control. How do I do this? Thanks, Nima Tag: Treeview SelectedNode changes randomly Tag: 84235
  - 14
    - MessageLoop on a thread Is there a way to add a Windows MessageLoop to an existing thread? I have a .NET application that is called from from a COBOL app using COM, and when I show a form, the System.Windows.Forms.Application.MessageLoop is set to false. Is there some way to ensure that the form displayed has a MessageLoop? I have tried displaying the form several ways (described below), but all of them seem to have some problem that makes it a less then ideal solution. Showing the form this way: System.Windows.Forms.Application.Run(_child); Worked great, except that the user couldn't get back to COBOL application that launched the .NET form - and we needed to be able to do that. So I tried this: ShowFormDelegate formshow = new ShowFormDelegate(ShowFormMessageLoop); this.AppContext.CurrentWorkbench.Form.Invoke(formshow, new object[] {_child}); Where ShowFormMessageLoop is: private void ShowFormMessageLoop(Form frm) { frm.Show(); } (Where this.AppContext.CurrentWorkbench.Form is a form that is not visible, in fact it's never visible, it's just created in the background. ) But this does not have a MessageLoop, so Tabs, ESC, function keys, etc. are not processed at all on the form. This method came the closest to working correctly, except that some of the 3rd party controls (grids and toolbars) that were on the forms would not process keystrokes correctly - the controls are apparently implementing a message filter that is not getting processed. _applicationcontext = new System.Windows.Forms.ApplicationContext(_child); ThreadStart _threadstart = new ThreadStart(this.StartMessageLoop); Thread _thread = new Thread(_threadstart); _thread.IsBackground = true; _thread.ApartmentState = ApartmentState.STA; _thread.Start(); Where StartMessageLoop is: private void StartMessageLoop() { System.Windows.Forms.Application.Run(_applicationcontext); } If anyone has any ideas, I would greatly appreciate it. Thanks! Theresa Tag: Treeview SelectedNode changes randomly Tag: 84220
  - 15
    - Invalidate but do not draw background I work on a data acquisition system. I need to display data as it comes. There are two different modes: 1. Display only current set of data each time it is ready. 2. Display the current data, but don't erase the previous one. I remember in MFC I was able to do this by changing one parameter (DrawBackground() or something like that). I am trying to do it with C# and failing. If I use Invalidate() or Invalidate(rect) functions, than the previous data is erased. However if I just use my plotting functions directly to display the data, then I need to create Graphics (this.CreateGraphics) and pass it to the plotting routine. But then the program crashes some time when I try to resize the window for example. It tells me that a Brush (or Color, etc...) is used somewhere. I think it is because I have two requests for plotting data with two different Graphics: one is coming from acquisition board when the data is ready, and the other - from Windows when I resize the window. Is there any way to use Invalidate() but somehow specify not to erase the background? This would solve all the problems as I did not have to create another Graphics and just use the one that is generated by .NET in the Paint message. Thank you in advance, Viktor Tag: Treeview SelectedNode changes randomly Tag: 84219
  - 16
    - IE Download Capture Hello peeps, Does anyone know how to hook into the IE download like gozilla does? Tag: Treeview SelectedNode changes randomly Tag: 84215
  - 17
    - Help: I can't view a WinForm in [Design] mode Hi, I'm using Visual Studio.Net 2002 and I can no longer open my windows forms in Design mode. In the Solution Explorer, I see the white "VB" icons instead of the grey "Form" icons. I already tried rebuilding the whole solution and made sure and all of the references are correct but it still doesn't work. Any other ideas? Thanks in advance! Tag: Treeview SelectedNode changes randomly Tag: 84212
  - 18
    - Highlighted Text I've created a Dialog box with textbox to display messages to the user of the program. Whenever I write text to the text box it always comes out highlighted. I can't seem to figure out how to de-highlight the text within the textbox. Anyone have any idea how to do this? Thanks Marv From http://www.developmentnow.com/g/29_2005_1_0_0_0/dotnet_framework_windowsforms.htm Posted via DevelopmentNow Groups www.developmentnow.com/g www.developmentnow.com Tag: Treeview SelectedNode changes randomly Tag: 84208
  - 19
    - WindowsForm freezes on second launch I have a WindowsForm application that I developed on my XP workstation. It is a nulti-threaded socket application that sends and receives messages. On my workstation I can close and restart the application normally with no ill effects. Now when I put the application on a Windows 2000 Server it runs perfectly fine the first time around. However, when I close the application and try to restart it the second time it won't show the UI, minimizes itself to the taskbar and Task Manager shows it as Not Responding. Is this a Framework issue? XP vs 2000? Any ideas where to start? Thanks Bigreddog Tag: Treeview SelectedNode changes randomly Tag: 84194
  - 20
    - Async windows programming Three quick (I hope) questions regarding async programming in a windows form: 1) When I perform a BeginInvoke on a delegate in my own thread (actually the main GUI thread) in the midst of a message event handler (say OnMouseUp), does the implementation basically work the same as the BeginInvoke from another thread, i.e., a message is posted, the event handler completes execution, then when the message is dequeued, the target method is invoked? 2) Is there a complete list of how synchronous paint calls can be generated? I know that doing an Invalidate() simply queues a paint message, but adding an Update() causes a synchronous paint message. If my handler for the async event absolutely needs to know that OnPaint(0 is not entered while it is doing it's work, what else could it do incorrectly, (besides calling Update()) that could cause a synchronous OnPaint() 3) Are any other calls to handlers made synchronously (like mouse moves or mouse up/down, etc)? -- Mark Stega Tag: Treeview SelectedNode changes randomly Tag: 84193
  - 21
    - Reversing text in TreeView nodes I haven't received an answer to my question of a few days ago regarding a flipped treeview control posted in the dotnet.framework.windowsforms.control newsgroup, so I thought I'd ask it again. Sorry about the cross-posting, but I'm getting desperate as the drop-dead date, the 25th of this month, on my project approaches. I'm attempting to create a TreeView similar to the one on the right-hand side of the BizTalk Mapper screen. I'm able to create a mirror image of a normal TreeView with everything swapped left-for-right, kind of like looking at the reflection of the tree in a mirror; unfortunately, that everything also includes the text for each node. Is there a way of creating a bitmap of each visible node and performing a Bitmap.RotateFlip(RotateFlipType.RotateNoneFlipX) on it prior to performing a Bitmap.RotateFlip(RotateFlipType.RotateNoneFlipX) on the bitmap of the entire tree? Is there another way of accomplishing the same thing? Any help would be greatly appreciated. Tag: Treeview SelectedNode changes randomly Tag: 84190
  - 22
    - Reading Text datatype into a byte Array Hi, I am populating a records fetched from a select query in OleDbDataReader. The datbase is MS Access, The datatype of the select query column is Text. I want to read the data as Byte array instead of string as Reading it into a string causes it to be converted to Unicode which is do not want. Anybody is aware of some sites from where i can get valuable information or some sample project please do let me know about it. Any information provided will be greatly appreciated. Thanks in advance, Debu Tag: Treeview SelectedNode changes randomly Tag: 84188
  - 23
    - Show Help and Minimise and Exit Hello. It seems that in order to get the help (?) button to show in the top right of a form, the minimum and maximum properties need to set to false. I would like to have a help, minimise and exit button on my form. Is there any way to do this? Many thanks for your assistance. Tag: Treeview SelectedNode changes randomly Tag: 84186
  - 24
    - Drag Drop using Menus Hi, I have a sitiuation in which I need to initiate a drag operation on a grid based on a menu click or button click. For example, the user right clicks on the grid and a context menu is shown. One of the menu's is called "Move". If the user clicks on the Move menu item, the grid should initiate the drag procedure. I call the Grid.DoDragDrop(...) on the click of the menu, but as "Click" means mouse down and then mouse up, the drag operation gets "cancelled" and immediately after the call to Grid.DoDragDrop(), the Grid's DragDrop event is called - meaning that the Drag operation is over. Is this any intutive way to accomplish this i.e. initiate Drag from a menu? Tag: Treeview SelectedNode changes randomly Tag: 84181
  - 25
    - restart application How to write windows application in VB.NET , which on getting the error should restart Tag: Treeview SelectedNode changes randomly Tag: 84178
- Next
  - 1
    - GDI+ encoder CLSIDs and image resampling Hi folks Hope this isn't OT here. I got no joy in microsoft.public.win32.programmer.gdi. (1) I'm using GDI+ to save an image in various standard (built-in) formats: JPEG, GIF, BMP etc. I currently have the encoder CLSIDs hardcoded. Is that safe, or should I iterate the encoders at runtime, looking for one with the relevant MIME type? (2) I'm using GdipGetImageThumbnail() to resample images smaller *or larger*. I've tried altering the interpolation mode to see if that makes any difference. It doesn't seem to. Here's what I'm doing: GdipGetImageGraphicsContext lOldBitmap, graphics GdipSetInterpolationMode graphics, <mode> GdipGetImageThumbnail lOldBitmap, W, H, lNewBitmap - Is GdipGetImageThumbnail() appropriate for resampling images larger, or is there a better way? - Should it use the interpolation mode that I have tried to set above? - Why does changing the interpolation mode, require a graphics context? Resampling is just a mathematical operation on the bitmap content. What does the graphics context contribute? TIA, TC Tag: Treeview SelectedNode changes randomly Tag: 84171
  - 2
    - GDI+ encoder CLSIDs, and image resampling Hi folks Sorry if this is OT, but I got no joy in microsoft.public.win32.programmer/gdi. (1) I'm encoding to standard (built-in) formats: JPEG, BMP, GIF etc. I currently have the encoder CLSIDs hardcoded. Is that safe, or should I iterate the encoders at runtime, looking for ones with the relevant MIME types? (2) I'm using GdipGetImageThumbnail() to resample images smaller *or larger*. I've tried altering the interpolation mode to see if that makes any difference. It doesn't seem to. Here's what I'm doing: GdipGetImageGraphicsContext lOldBitmap, graphics GdipSetInterpolationMode graphics, <mode> GdipGetImageThumbnail lOldBitmap, W, H, lNewBitmap - Is GdipGetImageThumbnail() appropriate for resampling images larger, or is there a better way? - Should it use the interpolation mode that I have tried to set above? - Why does changing the interpolation mode, require a graphics context? Resampling is just a mathematical operation on the bitmap content. What does the graphics context contribute? TIA, TC Tag: Treeview SelectedNode changes randomly Tag: 84170
  - 3
    - Microsoft: Help with OLE documents... Hi all. I have an application to draw and design different documents, that supports linking and embedding of other documents (like, for instance, Corel Draw or Word). Then, the user can print their designs "WYSIWYG", so I load the external document inside an OLE document container control (VB6), get a handle to the object and invoke OleDraw with the hDC that I want the object in. This have been working excellent, and this application is largely distributed among our clients. The problem is we want to migrate to .NET (any language, VB, C#, C++, ...), but there's no OLE container that lets me obtain a handle to an OLE document. I know you could import COM and ActiveX, but this particular control (included in VB6) CANNOT BE IMPORTED NOR INSERTED in .Net. Microsoft calls this a "migration issue" and warns us about it, but how, then, can I draw an Ole document inside our application (let alone open, edit, update, etc)? Is Microsoft planning to update this component for VS.Net 2005? Or is there an alternative? I know I could load an OLE document "the hard way", but those are methods so obscure, I get lost before even starting to insert the document in a container... If this is the only solution, is there an easy (as easy as this can be) example that can lead me to accomplish the insertion of a document inside mine? I know it can be done, because RTF editor lets you do it. It even lets you open and edit the document, and "paste special", but I don't seem to accomplish getting a handle to any of those inserted objects... Thank you for your time, VBen. Tag: Treeview SelectedNode changes randomly Tag: 84169
  - 4
    - memory leak in Timer controls, and thread sleep Hi, We have find memory leaks when we tried to use timer to raise event at specified interval. The OS we use is: Windows XP Professional Version 2002, service Pack 2, IDE is: Visual Studio .NET2003. Microsoft .NET Framework 1.1, version 1.1.4322 SP1. To repeat this problem, 1. creat a VB windows solution 2. on the form, add a timer control, set the property interval to 100 3. add a button, name it "start" 4. add an event handler( command_click) to the button "start" 5. in the event handler, start the timer 6. watch in the "task manager", memory is prograssively increase, 7. to make this problem more clear, add another timer, set the interval to 10, again, when the button "start" clicks, start both the timer. this time you probably will notice the memory leaking faster, in 10 minutes, you will find it is leaking around 1MB. I tried to change the timer control to System.timers.timer, and use call back functions at the specified interval, I have the same problem. Further investigation into the memory leaking, we found if you put the thread into sleep at certain amount of time, the memory leaks as well. Is ther any one who knows why? This memory leak crashes our application. I tried to force garbage colletion, things getting even worse. Any suggestions are welcome. Lihui Tag: Treeview SelectedNode changes randomly Tag: 84165
  - 5
    - Resize a form based on content size Is it possible to resize a form based on the size of its contents? In VB6- we had ScaleWidth & ScaleHeight properties, with which one could get/set the form size to fit exactly. Is there an analog in the .NET Framework? Thanks! -Evan Tag: Treeview SelectedNode changes randomly Tag: 84163
  - 6
    - Treeview scroll problem I have a treeview control on a form with Scrollable=True. If a user scrolls the list and then selects a node, the selected node returned by the AfterSelect event is always the topmost visible node in the list, not the node selected. This also happens for the click event, but double-click works ok. Can someone suggest a workaround for this behaviour? Tag: Treeview SelectedNode changes randomly Tag: 84162
  - 7
    - My Brain Hurts _ One last undetermined error I have an application based on the Issuevision example at MSDN. The program falls over at this line: Application.run(New MainForm) Call Stack// 'DefaultDomain': Loaded 'c:\windows\microsoft.net\framework\v1.1.4322\mscorlib.dll', No symbols loaded. 'RevMed': Loaded 'C:\Sandbox\MedOOP2\bin\RevMed.exe', Symbols loaded. 'RevMed.exe': Loaded 'c:\windows\assembly\gac\system.windows.forms\1.0.5000.0__b77a5c561934e089\system.windows.forms.dll', No symbols loaded. 'RevMed.exe': Loaded 'c:\windows\assembly\gac\system\1.0.5000.0__b77a5c561934e089\system.dll', No symbols loaded. 'RevMed.exe': Loaded 'c:\windows\assembly\gac\system.drawing\1.0.5000.0__b03f5f7f11d50a3a\system.drawing.dll', No symbols loaded. 'RevMed.exe': Loaded 'c:\windows\assembly\gac\system.data\1.0.5000.0__b77a5c561934e089\system.data.dll', No symbols loaded. 'RevMed.exe': Loaded 'c:\windows\assembly\gac\microsoft.visualbasic\7.0.5000.0__b03f5f7f11d50a3a\microsoft.visualbasic.dll', No symbols loaded. 'RevMed.exe': Loaded 'c:\windows\assembly\gac\system.xml\1.0.5000.0__b77a5c561934e089\system.xml.dll', No symbols loaded. 'RevMed.exe': Loaded 'c:\sandbox\medoop2\bin\threadhelper.dll', No symbols loaded. An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in system.windows.forms.dll Additional information: Specified argument was out of the range of valid values. Help greatly appreciated Tag: Treeview SelectedNode changes randomly Tag: 84159
  - 8
    - Synchronizing 2 grids via the CurrencyManager I have written a custom databound grid control that we've been using successfully for months, but one of our developers has just run into a problem that I can't figure out. The code for setting it up is as follows: DataSet dataSet = new DataSet( "TestSet" ); DataTable tableParent = dataSet.Tables.Add( "TableParent" ); tableParent.Columns.Add( "ID", typeof( Int32 ) ); tableParent.Columns[ "ID" ].AutoIncrement = true; tableParent.Columns[ "ID" ].Unique = true; tableParent.Columns.Add( "Col1", typeof(Int32) ); tableParent.Columns.Add( "Col2", typeof(Int32) ); DataTable tableChild = dataSet.Tables.Add( "TableChild" ); tableChild.Columns.Add( "ID", typeof( Int32 ) ); tableChild.Columns.Add( "Col1", typeof(Int32) ); tableChild.Columns.Add( "Col2", typeof(Int32) ); dataSet.Relations.Add( "Child2Parent", tableParent.Columns[ "ID" ], tableChild.Columns[ "ID" ] ).Nested = true; gridParent.DataSource = dataSet; gridParent.DataMember = "TableParent"; gridChild.DataSource = dataSet; gridChild.DataMember = "TableParent.Child2Parent"; The way it is supposed to work (and does work with the MS DataGrid) is that when you select a row in the parent table, it should set the data in the child table to all children of the selected parent. In my grid, when the current cell changes, I set the position in the CurrencyManager to the new position. My understanding (and apparently a false one) was that the CurrencyManager would update the position in the underlying dataset which in turn would then inform all CurrencyManagers bound to it. Apparently that's not the case. The parent grid receives the CurrencyManager.PositionChanged event but the child grid receives no events from its CurrencyManager. How am I supposed to propagate an update to the child grid? Thanks. Pete Tag: Treeview SelectedNode changes randomly Tag: 84157
  - 9
    - ListView & Copying of Hi, I have a windows form, in C#. It has a ListView on it. For a couple of reasons I now need to be have multiple sets of Data that can be dynamically Copied into and out of the ListView. But I'm having realy trouble with it....and feeling pretty frustrated. I firstly tried copying over listView.Items - which is ok to read out of, but its a read only property and can be copied back over. Also tried listView.Items.CopyTo (lviArray) and tried a listView2.Items.AddRange (lviArray), but I get an exception about data already existing else where either remove it first or clone it. Tried cloning it but that doesn't seem to work either. Feel I am missing something. Any help would be appreciated. Thanks, Laura Tag: Treeview SelectedNode changes randomly Tag: 84155
  - 10
    - Drag and Drop question I am writting an application (app A) where the users can drag some text within my application and drop it in another application (app B). When the item is dropped, the app A must know that an it was successfully dropped in app B and do further processing. How can this be done? Thanks. Tag: Treeview SelectedNode changes randomly Tag: 84154
  - 11
    - Program PowerPoint using C# I am trying to locate some examples or some instructions on how to program the PowerPoint object model using C# in a Windows Forms or ASP.NET application. -- Charlie Jursch Patotech Software, Inc. Danville, CA Tag: Treeview SelectedNode changes randomly Tag: 84152
  - 12
    - Controls Disapear when I Compile Windows Forms I have come across a strange BUG in VS 2003 that drives me nuts and makes working in the Windows Form designer sometime impossible. This usually happens when I have made a lot of changes to a form by deleting then re-adding a bunch of controls. The problem happens when I try to re-add controls. I can add the controls and get them all exactly where I what, and the form looks good then I compile the project/solution and then everything goes bad. I get strange errors like: "Duplicate declaration of member 'location'" or just "Member Not Found". When you double click on them all it does is take you to the top of the class. When you look at the form generated code you can tell that most of the properties to tell the control where to display and its size are missing, so when you look at your form all your controls are gone in design mode. I end up having to go into the code and deleting the declarations manually and removing all the code in that was generated by the designer. I have looked at the KB article 821309 that is for the problem with 'location', but that says it is only a problem in 2002 and the workaround didn't work for me anyway. Right now I have one form that I can do this on pretty much every time I add a control. I can add one control get it like I want then I save it and check it in. Then I check it out make more changes. I keep checking in and out so if I make to many changes and everything gets screwed up I don't have to redo everything again. We use Vault 3.0 for our source control and this isn't a Vault problem because I had this issues with Visual Source Safe also. Any help on this problem would be great. I have tried deleting the RESX file for the form, but that doesn't help either. Thanks, Eric Renken Tag: Treeview SelectedNode changes randomly Tag: 84150
  - 13
    - Hierarchical presentation style for DataGrid I have bound datagrid to a dataset with a datarelation defined between work orders and line items of those work orders. The default navigation style is to present the [+] at each work order. You expand, and it shows the name of the datarelation in a new line, that is shown as a hyperlink. You must THEN click the hyperlink and then it clears the data grid display, shows the parent work order data at the top, and then a grid of columns for the line item. I have seen grids show subordinate records on the same "page" as their master records, with column headings for the expanded area appropriate for the line items. How is this done? Tag: Treeview SelectedNode changes randomly Tag: 84149
  - 14
    - Unhandled exception after calling child form's Dispose(). Hello, I have a main form (MainForm) which contains File->New menu item. On clicking File->New menu item, i am displaying a form (ChildForm) which contains a lot of controls and a lot of complex code. Everytime the File->New menu item is clicked, a new instance of ChildForm is created and shown as modal dialog with MainForm as owner. In the ChildForm's Dispose() method, i have included code to remove all event handlers, cleanup the controls etc. After call to ChildForm.ShowDialog(MainForm), i am calling the ChildForm.Dispose() method explicitly, to release the window handles. The problem here is I am getting an Unhandled Exception saying "System.NullReferenceException: Object reference not set to an instance of an object. at System.Windows.Forms.ChildWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)". Please help me! Thanks, VijayakrishNa P. Tag: Treeview SelectedNode changes randomly Tag: 84136
  - 15
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Hi,
I've a treeview which I use to show a departments employees. When a new
employee is added to a department, I clear all the nodes from the tree, and
build it again. Suppose after adding the new employee, the user is clicking
on a particular node in the Tree, I want to save the data, rebuid the tree to
refresh the changes, and then set the SelectedNode as the new node that the
user clicked.

All this happens correctly, it goes to AFterSelect event and there I can see
the correct node is selected, then it fires AfterSelect event once more and
this time some node gets selected randomly.
I'm setting the SelectedNode to nothing before Clearing the nodes and
rebuilding the tree.

If anyone has encountered a similar problem and found a solution, please
help me.

Thanks,
Debi

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