Interfaces in Framework 2.0

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  - 1
    - Drag and Drop an attachment from an Outlook message I have an email that has a file attached to it. If I save the file and drag the file from Windows Explorer to my form, I get a DragDrop event with data type of FileDrop. If I drag the file directly from the opened email, I get a DragDrop event with the data type of TEXT. What is worse, it appears to be a empty text string. The file in question is a .xml and fairly small, so I would even be happy if I could just get the contents of the file as text. Should I be able to receive that file directly from Outlook email and if so, how. Thanks ------------------------------------------- Roy Chastain KMSYS Worldwide, Inc. http://www.kmsys.com Tag: Interfaces in Framework 2.0 Tag: 92423
  - 2
    - Crystal Reports: Setting LineObject.Left throws exception Hi guys I would like to position a line in a crystal report at runtime. I managed to do the same with a field object and a text object, however it does not work with the line object. Using the command: 'myLineObject.Left = 400;' the following exception occurs: ------------------------------------ An unhandled exception of type 'CrystalDecisions.CrystalReports.Engine.InvalidArgumentException' occurred in crystaldecisions.crystalreports.engine.dll Additional information: Error in File C:\myReport.rpt: Invalid object type. -------------------------------------- Note that the LineObject.Left property is according to the documentation not read-only. Do you know how to solve this problem? Thanks in advance for helping me out. Chris Tag: Interfaces in Framework 2.0 Tag: 92420
  - 3
    - Patterns and best practise for model/view/controller separation? Hi all, I have quite some design experience on other platforms and especially with web applications. Now I'm about to design a .NET application and am a little stuck as I am trying to apply my "habits" of separating model, view and controller. Either that is the totally wrong approach or I am not familiar enough with the platform to make it :). By now, I've already written some model classes and test cases. In that simple case, the "controller" is nothing more than the logic that creates the right instances of models, connects them and calls some business methods on them, validating the results. Now as it comes to adding a GUI and responding to user input, I was hoping that there is something like the "blueprints" with J2EE, that is, some patterns as design recommendations on how to sort things out; or maybe you can share your thoughts and experience with me? I'll try to describe the problems I've run into so far; that should make it easier to reply as the question will be less abstract :) For every model, I will have one or more views to display the models. These views are subclasses of System.Windows.Forms.Form. Basically - how to separate controller and view? It seems to me that it's always the Form class that reacts on user input; but maybe that is just because the IDE/designer suggests that? I assume it is possible to move that code to some "controller" class (probably somehow using the properties of the form controls?) - but is that a good idea? Shouldn't I just keep it as suggested? Next, is it right to create a new instance of a certain view class (the form) for every model I want to display? Or should I avoid creating too many instances of the form class - that would mean I should instantiate every form only once and use something like the flyweight pattern to provide the view with the model it is supposed to display? If several form instances are ok and I keep the controller logic in the form class as well, one approach would be to simply pass the form its model in the constructor like: static void Main() { Model m = new Model(); View v = new View(m); // View subclasses System.Windows.Forms.Form Application.Run(v); } The view would then - maybe in an btnOK_Click handler - update the model, maybe like void button1_Click(object sender, System.EventArgs e) { myModel.doSomeBusiness(textBox1.Text); } Is that a good approach? Clearly, what button1_Click does is the job of a controller. One more problem with the "pass model to form/view constructor" approach is when instantiating new models: Sometimes I need to display a form to collect some user input; that user input is necessary for creating the new model instance. Later on, the same view class is supposed to provide the means of manipulating the model again. I feel it's not a good idea let the form be constructed without a model and add another method like "createAModelFromInput()" that would build the "new" model for me. Thus, another way would be to have something like (informal notation) class Controller { newModelUseCase { v = new View() v.display() // extract "pure data" from view here m = new model(data extracted) } updateModelUseCase { m = someModelIAlreadyGot; v = new View() // extract all data from model here // populate v with the data v.display() } } Now that is clearly too much for a controller - the whole "extract data from model and populate view" thing is the view's responsibility. As a side note, with my specific application requirements I would benefit if the whole create new model / update model could be generic. I know that there will be future extensions to my application that will bring new models with appropriate views, so it would be elegant to keep that part of code arbitrary enough to work with such extensions. As to updating the view upon model state changes, that's probably no problem with a standard observer pattern approach where the view might (pherhaps in its constructor) subscribe for model notifications. The only thing I'm a little afraid here is that in the future, threading problems might arise (what if the model changes in a non-GUI thread and does the notification from there?). I'm happy you read until here :) Again, point me to some recommended approaches/patterns/best practices if there are some :) - I found nothing that satisfies me :). Please reply to the group - I will follow things here. Thanks in advance, Matthias Tag: Interfaces in Framework 2.0 Tag: 92417
  - 4
    - DataGridViewButtonColumn.Text doesn't display onLoad Hi I have a DataGridView on a form, and the last column is of type DataGridViewButtonColumn. How do I get the button text ("Edit") of this column (colEditButton) to display on load of the form? At the moment, my button is blank until I edit a cell in the same row :-( Here are the column's current properties: // // colEditButton // this.colEditButton.AutoSizeMode = System.Windows.Forms.DataGridViewAutoSizeColumnMode.None; this.colEditButton.FillWeight = 32.91695F; this.colEditButton.FlatStyle = System.Windows.Forms.FlatStyle.System; this.colEditButton.HeaderText = "Edit Lookup Table"; this.colEditButton.Name = "colEditButton"; this.colEditButton.Resizable = System.Windows.Forms.DataGridViewTriState.False; this.colEditButton.Text = "Edit"; this.colEditButton.ToolTipText = "Edit Lookup Table"; this.colEditButton.UseColumnTextForButtonValue = true; I'm using VS 2005 Beta 2 Thanks! Tag: Interfaces in Framework 2.0 Tag: 92413
  - 5
    - DataBinding to Custom Class breaks after New instance: how to get around this? Hi, I'm having the following situation: - A class clsFournisseur with public property's which raise a MyPropertyChanged-event in the Set-method for each Property. Public Event NomChanged As EventHandler Public Property Nom() As String Get Return m_strNom End Get Set(ByVal Value As String) m_strNom = Value RaiseEvent NomChanged(Me, New EventArgs()) End Set End Property - A Form, with an instance of my clsFournisseur: "Private WithEvents MyEntreprise As New clsFournisseur". - Proprty's of this Myentreprise are bound to controls on the Form: "Me.txtNom.DataBindings.Add("Text", MyEntreprise, "Nom")" When I change the value in my txtNom.Text, the MyEntreprise.Nom-property is changed. When I change the MyEntreprise.Nom, my txtNom.Text is changed. So far so good. BUT: When in my Form I want to use another clsFournisseur, there isn't anymore databinding. I do this like this: - MyEntreprise = New clsFournisseur(intEntrepriseID) or - MyEntreprise = New clsFournisseur() I guess this is normal behaviour because, even when it still has the same name, it isn't the same class anymore. But I still want to have this databinding! And a weird thing: the txtNom.Databindings.Count = 1, so the TextBox thinks there is still the databinding... Does anybody know how I should do this? Am I doing anything wrong? Should I Clear all the DataBindings after echt new instance of a class and put them back? Any help would be really appreciated. Thanks a lot in advance, Pieter PS: I'm using the CTP from august of Visual Studio .NET 2005 Tag: Interfaces in Framework 2.0 Tag: 92399
  - 6
    - Get ALL controls on a Form Hi, Is there actually a way to get ALL the Controls on a Form? While using the ControlCollection, it only returns the Controls that are directly on the Form, not the controls that are on a (TableLayout)Panel etc. I never found something like that, but it just would be nice in my opinion :-) Thanks, Pieter Tag: Interfaces in Framework 2.0 Tag: 92398
  - 7
    - Help file conversion Hi, I want to display help files in my windows application. Please tell me how to display .chm files through my C# code. Thx in advance. Prasad. Tag: Interfaces in Framework 2.0 Tag: 92396
  - 8
    - Scrolling in a list box Hi, I have two list boxes of the same size and the same number of items in them. The number of items is big, so to accommodate them the list boxes display vertical scroll bars. I want to synchronize the vertical scrolling of these two list boxes, so when one of them is scrolled by the user, the other is scrolled as well so they are both at the same scroll position. How can I do this? I looked for some sort of scroll event that would tell me the position of the scroll bar but I could not find anything. There was a similar example in "Programming VB6" by Francesco Balena, but a "Scroll" event is used there, which we dont have in .NET ( at least I cant find it) Thanks Tag: Interfaces in Framework 2.0 Tag: 92392
  - 9
    - Win Forms App Code Generation? I'm new to .NET and somewhat disappointed in the amount of manual work required to get a simple Win Forms database application built. I'm used to working with a development environment called "Clarion" (that I'm guessing you've never heard of), which can take you from data dictionary to fully functioning application (browse, search, reporting, insert, change, delete, etc), with only a few mouse clicks. Leaving me time to spend on the more serious aspects of the application. What's more, the system doesn't abandon you after the code is generated, but handles design changes. Anyway, coming from this environment to .NET leaves me wondering if you guys really do hand-code all your basic database table browse and update forms? Admittedly I've only been playing with Visual Studio 2003 (and C#) for a while, but it seems very time consuming. Surely there is a better way? Let say I gave you a database with 100 tables and said I wanted a Win Forms application with data entry forms and filterable browse lists on all of them, including the relevant parent-child relationships, referential integrity, concurrency chechking, validation "lookups" - the usual bells and whistles. Is the .NET way to sit down for months and hand-code all this? Or am I totally missing something? I've done a web search for code generators and found a couple, but with little experience with .NET it's hard to tell from the trial versions if they fit the bill. Neither seem to handle design changes, but are kind of like complex wizards. Can anyone offer some pointers, links to sites, tools they used and liked, books I should read, or a more appropriate approach to take? Tag: Interfaces in Framework 2.0 Tag: 92391
  - 10
    - Forms and Panels don't respond to help requests? Hello, Why don't forms and panels respond to help requests? I have a basic form showing the Help button in the title bar, a HelpProvider, a panel and a button; and the panel and button are identically configured to show help on the HelpProvider. When I use the Help button and click on the button the .chm is opened; when I click on the panel (or the background of the form), nothing happens at all. In addition, if I add an EventHandler to the HelpRequested handler of the panel, it never gets called either. So is there some magic trick here, is this a bug or some mysterious "feature?" I've tried this with labels and textboxes, comboboxes, pictureboxes, radio buttons, trackbars; all manner of UI controls. Why are panels and forms different? Anyone have some insight or suggestions? Keith Tag: Interfaces in Framework 2.0 Tag: 92388
  - 11
    - UIPAB - OpenFileDialog Hi, After writing several MDI and Forms demo-apps with UIPAB, I'm starting to feel comfortable with the UIPAB. There is, however, (at least) one issue left : according to http://builder.com.com/5100-6374_14-5058410-2.html saving a file should be an independent task. Now, since an OpenFileDialog is not a UserControl nor a Form, how should it be managed by UIPAB ? On the other hand, popping up an OpenFileDialog is so simple, that writing a separate view, controller, task and appropriate configuration seems a bit, well, overwhelming ... ;-) Any suggestion ? All your comments are highly appreciated ! Thanks, Bart Tag: Interfaces in Framework 2.0 Tag: 92383
  - 12
    - ComboBox BindingContext I have 2 ComboBoxes on a form bound to the same DataSet using a New BindingContext for the second one. Both ComboBoxes need to have their SelectedValue bound to a different DataSet . The first one works properly, but the second one will not select any value. I am pretty sure that this has something to do with the New BindingContext used on the second ComboBox, but I can't get around it. Note: The ComboBoxes are supposed to show a list of Employees (children). And the SelectedValue is from the Contacts table. Each Contact record has 2 Employee_ID fields. Any help would be greatly appreciated!! With ComboBox1 .DataSource = ds2 .DisplayMember = "Initials" .ValueMember = "PrimaryKey" End With ComboBox1.DataBindings.Add("SelectedValue", ds1, "ChildPrimaryKey1") With ComboBox2 .BindingContext = New BindingContext .DataSource = ds2 .DisplayMember = "Initials" .ValueMember = "PrimaryKey" End With ComboBox2.DataBindings.Add("SelectedValue", ds1, "ChildPrimaryKey2") Tag: Interfaces in Framework 2.0 Tag: 92381
  - 13
    - Re: Problem with listbox horizontal scrollbar I am having exactly the same problem, made worse by the fact that = MeasureString introduces a very significant slowdown. Can anyone help? Best wishes, Alex. markusszil (anonymous@discussions.microsoft.com) wrote in = microsoft.public.dotnet.general: > Hello all, >=20 > I have a fairly simple listbox into which I add, insert, and remove = strings. >=20 > It has the following property settings: > HorizontalScrollbar - true=20 > HorizontalExtent - 0 > ScrollAlwaysVisible - False >=20 > The problem I am having is that the horizontal scrollbar range doesn't = work right. If I add a string, the first time the sting width exceeds = the control width the bar appears, but it's off by a few pixels so the = last character is truncated. If I add longer items, it doesn't update so = I can't see the end of them. If I insert items, it never updates. Delete = only seems to work if the entire horizontal scrollbar should disappear. >=20 > I ended up writing code (at end of this post) which goes through all = the strings and uses the Graphics.MeasureString method, then sets = HorizontalExtent to the maximum result. It works, but seems very = cumbersome - and I can't find an event which fires when the = Items-collection changes which could simply call this method. Instead, I = need to go through my code and add calls to this at any point the = collection might change. >=20 > Is this a known issue with listboxes or am I doing something dumb. I = can't believe proper scrollbar operation requires added code. >=20 > Any tips appreciated. > Markus >=20 > Here is the code I had to add: >=20 > private void UpdateHorzScroll()=20 > { > Graphics g=3DGraphics.FromHwnd(Handle); > int wid=3D0; > foreach (object obj in MyListBox.Items)=20 > { > int swid=3D(int)(g.MeasureString(obj as string,Font).Width); > if (swid > wid) wid=3Dswid; > } > MyListBox.HorizontalExtent=3Dwid; > } --=20 Address email to user "response" at domain "alexoren" with suffix "com" Tag: Interfaces in Framework 2.0 Tag: 92380
  - 14
    - Adding a control to the end of a panel Hello everyone, I want to make a control similiar to Apples finder. I need to dynamically add ListBox controls to a panel in a way that all new listbox controls left edge is touching the right edge of the previosly added box and the new box's edge is touching the panels far right edge. Any help would be greatly appreciated. Tag: Interfaces in Framework 2.0 Tag: 92378
  - 15
    - datagrid IndexOutOfRangeException I got two datagrids the first is to display what has been retrived by a selectcommand from a dataset. The other dataset is to display data that is "bound" to the selected row in datagrid1. im filling datagrid1 and it works fine, when i select some row from datagrid1 the datagrid2 is filling fine too, but when i edit a cell from dataset2 and cancel the operation and cursor is on some cell, i get the next error: ************** Exception Text ************** System.IndexOutOfRangeException: Index was outside the bounds of the array. at System.Windows.Forms.CurrencyManager.get_Item(Int32 index) at System.Windows.Forms.DataGridColumnStyle.GetColumnValueAtRow(CurrencyManager source, Int32 rowNum) at System.Windows.Forms.DataGridTextBoxColumn.Edit(CurrencyManager source, Int32 rowNum, Rectangle bounds, Boolean readOnly, String instantText, Boolean cellIsVisible) at System.Windows.Forms.DataGrid.Edit(String instantText) at System.Windows.Forms.DataGrid.Edit() at System.Windows.Forms.DataGrid.OnEnter(EventArgs e) at System.Windows.Forms.Control.NotifyEnter() at System.Windows.Forms.ContainerControl.UpdateFocusedControl() Tag: Interfaces in Framework 2.0 Tag: 92375
  - 16
    - Page_Load event gets called twice I currently have an aspx page that contains a datagrid object and every time the page goes through its lifecycle the Page_Load event gets called twice. I've checked my code and I'm not manually calling it anywhere so the server must be doing it. Can anybody tell me why? and is it possible to stop it? Im using if(!IsPostBack) to see it its a reload and both calls are made before the IsPostBack is set to true. Any help would be appreciated. Thanks, Dave Tag: Interfaces in Framework 2.0 Tag: 92372
  - 17
    - How do you format a date in a ComboBox? I have a combobox that displays dates. They display in a long form, but I would like mm/dd/yyyy. If this were a TextBox, then I would use the Format() method of the Binding. The ComboBox is getting bound like this... cbDate.DataSource = theTable cbDate.DisplayMember = "theDate" cbDate.ValueMember = "theDate" How do I control what gets displayed in the ComboBox? Thanks. David Tag: Interfaces in Framework 2.0 Tag: 92370
  - 18
    - Multiple row select on windowsform datagrid with hidden row headers Hi all, Is it possible to implement multiple row selection on a datagrid when you have the row headers hidden? It works as usual holding the CTRL key as long as you are clicking on the row header, but it doesn't work if you click on the row itself... any help would be great Thanks Gav Tag: Interfaces in Framework 2.0 Tag: 92369
  - 19
    - OnPaint of Datagrid Hi all, I cannot remember where I read the article, however I read one that showed me how to overide the paint function of a datagrid so that I could highlight certain cells in different colours. This works great however if I sort the datagrid by a particular column the rows do not get updated so the wrong rows are then coloured! Can i force the datagrid to redraw when it is sorted? Thanks Gav Tag: Interfaces in Framework 2.0 Tag: 92368
  - 20
    - System.Windows.Forms.TextBox and Magtek Credit Card Stripe Reader I am writing a Windows Forms application where I am using a Magtek credit card reader, a "wedge", to read input into a TextBox control. I am trying to process the input in the TextChanged event handler. The problem I am having is that only the first character of input from the card magnetic stripe is captured in the Text property. In fact, when running in the debugger with a breakpoint in the event handler part of the text that is read gets written to the source file! This causes all kinds of problems in the application. I have done this on a Web form using the System.Web.UI.WebControls.TextBox without problem. What, if anything, can I do to capture the input from this device into the Text property of the Windows.Form.TextBox? Any input would be appreciated Thank, EagleRed Tag: Interfaces in Framework 2.0 Tag: 92367
  - 21
    - Display Union query in a datagrid? Hello, Is it possible to display a union query in a datagrid? If so how? If not what alternatives do I have? What I am trying to do... Primarily; I have two tables that contain related information and share similar columns. I want to merge them for reasons of display. Secondarily; I hope to be able to update either table individually - Column content will distinguish for the system which table to update. Is this possible?... how? -- dbuchanan Tag: Interfaces in Framework 2.0 Tag: 92366
  - 22
    - Catching MDI Application Closing I have an MDI application with a number of child windows. In each child window I am catching the Closing event and having the child window decide if it should set cancel to true. The intent here is to ensure that no child window can close while it is in a state where user entered information can be lost. I have just noticed that while the Closing event is caught if I click the X on the child window, it is not caught if I click the X on the MDI parent window. Is there some other event that I am missing here? Thanks, Ron L Tag: Interfaces in Framework 2.0 Tag: 92365
  - 23
    - error with events in html-document in mshtml/axwebrowser? HELP !! When using AXWebroswer in my Windows-Forms app it is impossible to catch all events of the displayed html-document. It only works with a few events. See the following example: //get the IHTMLDocument2 mshtml.IHTMLDocument2 htmlDoc = axWebBrowser1.Document as mshtml.IHTMLDocument2; if ( htmlDoc != null ) { // get the input item elemnet HTMLInputTextElement input = (HTMLInputTextElement) htmlDoc .all.item("id1", null); if ( input != null ) { // register eventhandler ((HTMLInputTextElementEvents2_Event)input).onclick += new HTMLInputTextElementEvents2_onclickEventHandler( this.Text_EventHandler ); } } private bool HTML_EventHandler(mshtml.IHTMLEventObj e) { MessageBox.Show("Alert from the html:text event" ); return true; } It is possible to register the appropriate event handler, but it is never called !!! But it works when i register an event handler for the click-event, see the following example. // register eventhandler ((HTMLInputTextElementEvents2_Event)input).onchange += new HTMLInputTextElementEvents2_onchangeEventHandler( this.Text_EventHandler ); Is there a different and working approach to catch these events? Tag: Interfaces in Framework 2.0 Tag: 92364
  - 24
    - edit local security policy using vb.Net I need to edit the local security policy of Windows 2000 machines to disable access for the local Administrator account. How can I programmaticly edit the local security policy using vb.Net? I have looked at using Group Policy, but I must specify each machine name before the account name to make it work. Group Policy won't allow me to do that from the server. Is there something that I am missing? Tag: Interfaces in Framework 2.0 Tag: 92362
  - 25
    - Exposing custom collections as datasources for VS in design time... how to do that? Hi all, I have some custom collections (ArrayList of custom Objects) and I want to display them using typical Windows form controls (DataGrid, Combo). What should I do to expose them as valid datasources to these controls? What if I want that these collections work with Visual Studio on design time in order to allow me easy create grid columns on design time? Can you point me to some examples? Thanks in advance Sammy Tag: Interfaces in Framework 2.0 Tag: 92361
- Next
  - 1
    - Clear Selection of a listbox Hi, I have couple of listboxes and a couple of combo box on a form. The listboxes are databound. I am trying to clear the selection of the listboxes if they are not selected by using ListBox.ClearSelected() but in vain. The following lines are in the constructor of the form. Listbox.DataSource = myDataSet; Listbox.ClearSelected(). Can anyone please suggest as to how to clear the selection of the listbox if not selected. Thanks in advance. Tag: Interfaces in Framework 2.0 Tag: 92348
  - 2
    - VPN question If i develop a window application in VPN network, can i use the domain account so as tologin the app Tag: Interfaces in Framework 2.0 Tag: 92347
  - 3
    - add row in datagrid Dear all, Can i add row in datagrid after i bind a dataset to the datagrid Tag: Interfaces in Framework 2.0 Tag: 92346
  - 4
    - export to excel Can vb.net export data to excel file and any license requirement? Tag: Interfaces in Framework 2.0 Tag: 92345
  - 5
    - Procedure expects parameter - What am I missing Hello, The error tells me; --------------------------- Procedure 'usp_sequ_sel' expects parameter '@sqfkJob', which was not supplied. --------------------------- But I do supply it!! What am I missing?? Here is my Stored Procdure [usp_sequ_sel] \\ CREATE PROCEDURE dbo.usp_sequ_sel (@sqfkJob char(36)) AS SET NOCOUNT ON; SELECT pkSequId, sqfkJob, sqComponentDescription, sqAction, sqDuration, sqSooOrder, sqSooPrecedent, sqSooDelay, sqSooNote, sqCreatedOn, sqCreatedBy, sqEditedOn, sqEditedBy, sqrowversion FROM tbl050Sequ WHERE (sqfkJob = @sqfkJob) GO // Here is the Variable as defined in f050Sequ \\ Friend Shared _pkJobID As String 'Using a GUID' // This variable is populated in a combobox \\ Me._pkJobID = Me.cboSelectJob.SelectedValue.ToString // Here is the button to load the datagrid. \\ Private Sub btnLoadTasks_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles btnLoadTasks.Click 'Verifies that the variable '_pkJobID' has gotten the value MessageBox.Show("From f050SqOO.vb ~ sqfkJob: " & Me._pkJobID) _dt = _dataSet1.tbl050Sequ 'The dataTable DAL.da050SequFrm.Fill(_dt) Me.DataGrid1.DataSource = _dt End Sub // Here is the command located in DataAccess.vb runs the stored procedure. \\ With cmd050Sequ_sel .CommandType = CommandType.StoredProcedure .CommandText = "usp_sequ_sel" .Connection = sqlConn With cmd050Sequ_sel.Parameters .Add(New SqlParameter("@RETURN_VALUE", SqlDbType.Int, 4, _ ParameterDirection.ReturnValue, False, CType(0, Byte), _ CType(0, Byte), "", DataRowVersion.Current, Nothing)) 'The line just below fails '.Add("@sqfkJob", SqlDbType.Text).Value = f050SqOO._pkJobID 'The line just below succeds .Add("@sqfkJob", SqlDbType.Text).Value = _ "18713191-e116-4d92-8cc2-c2d4e8c34fdb" End With End With // I use this same scenario in many other forms. For some reason I cannot see what is different here. f050SqOO._pkJobID seems not to be getting the value in DataAccess.vb Help me see the problem. thank you, dbuchanan Tag: Interfaces in Framework 2.0 Tag: 92339
  - 6
    - 4 pane SplitContainer The SplitContainer divides the space in two, either horizontally or vertically. I'd like to divide the space in four. By adding more splitters, the problem is that they don't keep in synch automatically. It'd be nice if when the mouse hovers in the center of the four regions a cross movement icon is displayed, and movement in the two axis is allowed. With the solution of adding more splitters the user is forced to first move in one direction and then in the other one. What do you recommend to achieve this? Thanks. Tag: Interfaces in Framework 2.0 Tag: 92336
  - 7
    - Adding forms into a panel Hi everybody: I am adding several forms into a panel to give MDI appearance to my panel.. Though the forms inside my panel looks fine, I have three problems: 1. The focused form does have the title bar activated (it is gray, like the inactive forms) 2. The only way to bring to front a form is clicking the title bar (in a MDI container, the user can click at anyplace in the form and it gets activated). 3. Cascade, horizontal tile and vertical tile functionality is not provided. Well, the tile and cascade window organization can be implemented, but I do not know how to deal with the focus and mouse problem. Am I doing something wrong? There is another way to implement this functionality? Thank you in advance Ernesto Tag: Interfaces in Framework 2.0 Tag: 92332
  - 8
    - MDI Child Controls If I have a second form that is a mdichild, let's say frm2 and I want to update a textbox control pragmatically... In my MDI parent, I open 5 instances Dim f as new frm2 private sub OpenForm() for i = 0 to 4 f = new frm2 f.mdiparent = me f.show end sub Now, from my parent, I want to update a textbox1 in the active mdi child, how can I? When I just try f.textbox1.text = "some text" it updates the control on the last handle created. I tried finding the active child but couldn't determine how to go from there after I got it. Any help and links would be great. Regards, Brian Tag: Interfaces in Framework 2.0 Tag: 92325
  - 9
    - Forms are re-locating Hi, I have an application which shows forms on two different independant screens. The Windows desktop is spread across these screens. The forms are all set to manual positioning, and so to show a form on the second screen, I simply set the coordinates to be on the second screen and that is where it goes. It now seems to have developed a problem however: When I trace through what is happening all the coordinates get set correctly, and then I call Show() for the form. When show returns, the forms coordinates have been changed to show it on the first screen. I can't trace into the Show function, as it's part of the framework, but something weird is happening. Has anybody seen this before or got any idea what could be going on? Thankyou in advance. Paul Cheetham. Tag: Interfaces in Framework 2.0 Tag: 92320
  - 10
    - FindDialog for RichTextBox problem Hi! I created a FindDialog for RichTextBox. I have 2 problem with it: - when I ShowDialog() my FindDialog, it got the focus and the RichTextBox stop displaying its current selection (it apparently need the focus to draw it), so when the user click "Find Next" I select the next match, but the user has no visual feedback :-/ - I also try the RichTextBoxFins.Reverse option, doesn't seems to work at all! Any ideas? -- If you're in a war, instead of throwing a hand grenade at the enemy, throw one of those small pumpkins. Maybe it'll make everyone think how stupid war is, and while they are thinking, you can throw a real grenade at them. Jack Handey. Tag: Interfaces in Framework 2.0 Tag: 92316
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    - Combo refresh/binding problem Hi- I have two combobox controls (among other controls) that are all bound to dataset0 from the "Main" table. Combobox2 is bound to a column that contains a FK (system_id) which corresponds to the PK from the "Systems" table. These combobox's also function as picklists and as such are filled from two corresponding datasets (dataset2 contains the system_id (PK) and SystemName column from the the "Systems" table. The contents of Combobox2 depends on the selected item in combobox1. usage model is as follows: The controls are all bound to dataset0 by a hand-coded procedure at form load. This works fine. Combobox1 is populated by dataset1.fill. The user can scroll through the dataset0 records from ""Main" table by navigation buttons. The displayed string values in the comboboxes change accordingly. When the user wants to make changes, he opens the current record for editing but using a button which unlocks the controls. He then makes a selection from dataset1 loaded in Combobox1. All good so far. The change event on Combobox1 fires, and the contents of Combobox2 should then be loaded by dataset2 which takes a parameter based on the selection made in combobox1. This is used a parameter to the dataset2 which should populate combobox2 with the appropriate choices for the selection made in ComboBox1. But what is reflected in combobox2 is a bunch of rows that all say "System.Data.DataRowView" I should mention that this was a port from a VB6 where this worked correctly. The combobox2.datafield property was set to an integer (system_id) representing a FK in a column in dataset0. When the user chose the value in Combobox1, the value was sent as a parameter which was used to a recordset which yielded values to populate ComboBox2. This recordset came from the Systems table. ComboBox2.boundcolumn was set to Systems.system_ID (the PK), and the Combobox2.listfield was set to Systems.systemname. Since the control was bound to FK system_id from dataset0, whatever value it was sitting on, would display the correct systemname. Obviously, I have no idea how to make this scenario work in .NET. Any help would be appreciated. -- thx, jf kaminsky Tag: Interfaces in Framework 2.0 Tag: 92315
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    - Sizing controls My application has a command that inserts controls on a Form. I move the controls by drag and drop. Now I need resize the controls like it's made by VS.Net in designer mode. How can I show the controls' edge lines and resize marks show on the corners? Thanks. Tag: Interfaces in Framework 2.0 Tag: 92312
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    - Window closed event? In a windows forms app how do you know a window is closing? There seems to be no event for this. I have timer object that appears to be firing after the window is closed (maybe) and I want to shut down and dispose the timer when the window closes. Tag: Interfaces in Framework 2.0 Tag: 92308
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    - What makes this code slow This code resets a form with two cbo's (comboBoxes) and one datagrid. The first cbo (cboSelection) selects a main table and filters the second cbo. The second cbo (cboView) selects the secondary table which determine the dataAdapter used to fill the dataGrid. Both cbo's are populated by filling dataAdapters. This code just empty's the datagrid, cbo's and dataset so the user can start over to view another set of data. \\ Private Sub btnResetForm_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnResetForm.Click 'Clear the datagrid Me.DataGrid1.DataSource = Nothing Me.DataGrid1.TableStyles.Clear() 'clear the dataset _dataSet1.Clear() DAL.da010JobFrm.Fill(_dataSet1, "tbl010Job") 'cboSelection Me.cboSelection.DataSource = _dataSet1 Me.cboSelection.DisplayMember = "tbl010Job.JobNumber" Me.cboSelection.ValueMember = "tbl010Job.pkJobId" _bStillLoadingCboSelection = False _bStillLoadingCboView = True End Sub // What makes this code slow? It is as slow as if it was about to throw an error. Or How can I test this code? Thank you, dbuchanan Tag: Interfaces in Framework 2.0 Tag: 92306
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    - How to get rgb of custom color I have a color in a bitmap from a screen capture. the color is defined in paintbrush with 6 numeric values. how to I convert this to rgb so I can assign it to some controls on a vb.net form? Thanks. -- moondaddy@nospam.nospam Tag: Interfaces in Framework 2.0 Tag: 92297
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    - Studio 2005 Style Drag & Drop Hints I am creating a UI framework that is in someways similar but also very different to the .Net IDE. The user can drag & drop framed panels anywhere, float them, split them, etc, etc. What I have been trying to do is recreate the Drag&Drop hints as in Visual Studio 2005 IDE. I have tried BilBlt, adding a transparent control over the drop control and other methods. Some get pretty close to working but I'm not quite happy with the solution. Has anyone done this before or have any idea to the best way to do it? Thanks. J. Tag: Interfaces in Framework 2.0 Tag: 92293
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    - Override Close > Hide problem Hi I have two forms, Form1 and FormInfo. In FormInfo I override Close(), cancels and hides the form. However now Windows isn't able to close my app automatically when the user tries to close Windows while my app also is running. Can this be solved without abandoning overriding the form? /Andreas Zita Tag: Interfaces in Framework 2.0 Tag: 92290
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    - Application.ThreadException becomes unwired? Hi, I'm writing a C# application that uses Application.ThreadException to handle uncaught exceptions gracefully. However, I'm having a problem where it is failing to catch some exceptions, and I've determined this is because the event handler is becoming unwired: if I reinstall the handler just before the code that causes the exception, the Application_ThreadException method is called. Do you know of anything that can cause this to happen? I've tried to replicate the problem in a less complex testbed project, but have had no success. Thanks in advance, Max Tag: Interfaces in Framework 2.0 Tag: 92284
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    - Problem with Scrolling in Tablet PC Hi All I am developing an application in C#.NET for Tablet PC. I am working on a form whose Height is 1024, so thats why scroll comes up if Form Exceeds Desktop's Hieght. For checking the check boxes or clicking the text boxes to gain focus or using tab for navigating focus down to the controls which are not in screen area. When I scrolled and clicked any control which is not in screen height area then my form automatically gets scrolled to the 0,0 location and am unable to check the checkboxes. Is this the problem of tablet Pc or am I missing something. Any help regarding the issue will be highly appreciated. Thanking In Advance Fiaz Ali Saleemi Tag: Interfaces in Framework 2.0 Tag: 92273
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    - Satellite Assemblies and Win Forms Hi, Iâ??m creating a project which uses Satellite Assemblies (SA) to isolate localized resources. The solution contains eight library projects, one GUI control project and one Windows Form project. I know how to approach SA for library projects, but I do not have any idea how to do it for Windows Forms and Controls. Should I use Localizable properties on every win form and win control that I create and copy resource files associated with form/control to SA? Or should I just create resource file in SA with the exact name as the resx files of form/control? Which approach is better? Or maybe there is another, different approach that I should consider? Which approach will allow me to modify form/control in the design view? --Start: Different question but still about resources Can I use String Resource Tools to create resx and corresponding cs file and then split them into two separate projects â?? resx and string file (string file is created by String Resources Tool) will go to SA, and cs file to new library project? Or maybe I can access cs file in file created by SA? --End. Iâ??ll be grateful for yours help. Kind regards, Jakub G. Tag: Interfaces in Framework 2.0 Tag: 92259
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    - Memory taken by an object How do I evaluate, in c#, the amount of memory taken up by any given object ? Tag: Interfaces in Framework 2.0 Tag: 92257
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    - Display Word document text in Windows Forms without text editor I want to open a word document and display all the text in a windows forms. Like the Ms Word Viewer. Only for read it, no modify. I do not have problems opening and reading the document. The problem is display de text. I do it of the following form: Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load filename = "C:\1.doc" Wrd.Documents.Open(filename, confirmConversions, rd, addToRecentFiles, passwordDocument, passwordTemplate, revert, writePasswordDocument, writePasswordTemplate, format, encoding, vis) End Sub Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint Dim range As Object Dim str As New System.Text.StringBuilder Dim drawfont As Font Dim drawbrush As SolidBrush Wrd.ActiveDocument.Range.SetRange(0, Wrd.ActiveDocument.Words.Count) Wrd.ActiveDocument.Range.Start = 0 Wrd.ActiveDocument.Range.End = Wrd.ActiveDocument.Words.Count - 1 For Each Rng In Wrd.ActiveDocument.Words ' Create font and brush. drawfont = New Font(Rng.Font.Name, Rng.Font.Size, FontStyle.Regular) drawbrush = New SolidBrush(Color.Black) Dim drawFormat As New StringFormat drawFormat.FormatFlags = StringFormatFlags.DirectionVertical ' Draw string to screen. str.Append(Rng.Text & " ") Next e.Graphics.DrawString(str.ToString, drawfont, drawbrush, x, y) End Sub 'I donÂ´t use any text editor because I wonÂ´t edit the text, only read. Some suggestion? Tag: Interfaces in Framework 2.0 Tag: 92255
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    - Word To .Chm Conversion Hi, In my windows application i am creating a word document. Word document has some pictures in it. I want to convert document file to .chm file. Is there any class available in .Net to do this? Thx in advance. Prasad. Tag: Interfaces in Framework 2.0 Tag: 92253
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    - OFFICE AUTOMATION LICENSING Dear all, If i develop a windows based application VB.NET , it need to export some excel and word document from the VB.NET application. such as excel report or word report and it need to import the reference of office component to do that, is it ok to deploy the windows application together with the imported office component dll library to client machine? Tag: Interfaces in Framework 2.0 Tag: 92250
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    - 2.0 question what's the difference between the 2 following events: Form.Closed Form.FormClosed ?? -- NovaMind development team NovaMind Software Mind Mapping Software <www.nova-mind.com> Tag: Interfaces in Framework 2.0 Tag: 92242

Hi,
Is it always a good idea to have a Interface.
Does it have any performance issues.

I am referring to Framework 2.0 Beta, Visual Basic 2005.

John.

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Re: Interfaces in Framework 2.0 by Herfried

Herfried
Tue Sep 20 10:16:28 CDT 2005

"Jonathan Lurie" <Jonathan@nospam.com> schrieb:
> Is it always a good idea to have a Interface.
> Does it have any performance issues.

This strongly depends on the situation, a general answer is impossible.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

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Re: Interfaces in Framework 2.0 by Jonathan

Jonathan
Tue Sep 20 10:50:19 CDT 2005

When should we use Interfaces.

JH

"Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message
news:u%23IRHZfvFHA.1648@TK2MSFTNGP10.phx.gbl...
> "Jonathan Lurie" <Jonathan@nospam.com> schrieb:
>> Is it always a good idea to have a Interface.
>> Does it have any performance issues.
>
> This strongly depends on the situation, a general answer is impossible.
>
> --
> M S Herfried K. Wagner
> M V P <URL:http://dotnet.mvps.org/>
> V B <URL:http://classicvb.org/petition/>

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