DataGrid flushing changes to DataSet.

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  - 1
    - keypress handling I need to implement keypress handler that works anywhere on a form (actually so long as I am on one of several tab pages on my form which is basically a tab control with 4 pages. Here is the problem - my TabControl.Keypress handler intercepts the keypress only of one of the grids on that same tab does not have focus. Essentially, once I select a row on a grid, my handler no longer receives keypresses, as they are now aparently directed to the selected grid. The handler is invoked if I am editing one of the edit controls. How can I intercept ALL keypresses within the form/tab page? Do I have to resort to the windows message handler? Tag: DataGrid flushing changes to DataSet. Tag: 65348
  - 2
    - Crystal Reports Problem: Please reply ASAP Hello All, I have a Windows application that uses Crystal Reports 9 (bundled Version) developed using VS.NET 2003 on a windows server 2003 m/c. The application has to be deployed on the client machine that has Windows XP installed. Before deploying we make sure that .NET framework 1.1 is installed on the XP machine. In the setup project, for support for Crystal Reports, we have added the following merge modules: 1)Crystal_Managed2003.msm 2) Crystal_Database_Access2003.msm 3)Crystal_Database_Access2003_enu.msm 4)Crystal_RegWiz2003.msm 5)VC_User_CRT71_RTL_X86.msm 6)VC_User_STL71_RTL_X86.msm The problem we are facing is like this: Whenever the user tries to pull up the reports, a database logon screen pops up for the report. I am unable to figure out as to why this is happening only for Crystal Reports. All the other functionality in the application is working fine without having to specify the database connection information interactively. The database server is not in the same network as this Client WinXP machine. We specify the IP address of the DB server in the DB connection string. Could this be a problem? If someone has faced this problem earlier or has any solution to this problem, do let me know. I need to resolve this problem ASAP. Thanks in advance Mithun Tag: DataGrid flushing changes to DataSet. Tag: 65342
  - 3
    - How to display My Network Places with FolderBrowserDialog I am using the FolderBrowserDialog in my application and it works well. However, when it is displayed, it does not include "+ My Network Places" in the list of available locations. I notice that other Microsoft applications (like opening a .zip file and clicking browse) do include My Network Places. How is this done? Thanks! Tag: DataGrid flushing changes to DataSet. Tag: 65340
  - 4
    - MDI, maximize child window Hi I have a windows form which has the following: form1.IsMDIContainer = true and panel1.Dock = DockStyle.Right. Then I create a new child window and set its FormBorderStyle = FormBorderStyle.None and WindowState = FormWindowState.Maximized. But what happens is the right half of this child window is covered by the panel and it's still showing the header of the window (icon, name, min, max, and close buttons) My questions 1. How do I make the child window maximize only on the left half on the parent window (not to make it behind the panel) 2. How do I hide the header of the child window when it's maximized Please advice, thanks -CL Tag: DataGrid flushing changes to DataSet. Tag: 65339
  - 5
    - control binding problem (MS, please respond) I've run into a problem with binding form properties to data in an xml file (through a dataset). As it turns out, I can easily bind if the data type of the property on the control is a normal datatype such as a string or integer. If the datatype is not one of the built-in types however, things go horribly wrong. Consider this xml file: <?xml version="1.0" standalone="yes"?> <SettingsData> <one> <Text>Center</Text> </one> </SettingsData> If I create a normal winforms application and add the following code to the form's constructor, it works. I get "Center" in the text box. Here's the code that works: DataSet dataset; dataset = new DataSet(); dataset.ReadXml(@"d:\development\bindtest\form.xml"); TextBox textbox = new TextBox(); Binding binding = new Binding("Text", dataset, "one.Text"); textbox.DataBindings.Add(binding); textbox.Width = 150; textbox.Height = 50; textbox.Top = 50; textbox.Left = 50; textbox.Parent = this; this.Controls.Add(textbox); I hardcoded the size and placement of the text box, but I can easily get that from the xml as well. I encountered a problem when I tried to pull TextAlign from the xml file though. I know that this would require the use of Format, so I implemented that. I changed the xml from above to look like this: <?xml version="1.0" standalone="yes"?> <SettingsData> <one> <TextAlign>Center</TextAlign> </one> </SettingsData> And I changed the code from above to look like this (changed from Text to TextAlign, and added the convert event handler): DataSet dataset; dataset = new DataSet(); dataset.ReadXml(@"d:\development\bindtest\form.xml"); TextBox textbox = new TextBox(); Binding binding = new Binding("TextAlign", dataset, "one.TextAlign"); binding.Format += new ConvertEventHandler(FormatHorizontalAlignment); textbox.DataBindings.Add(binding); textbox.Width = 150; textbox.Height = 50; textbox.Top = 50; textbox.Left = 50; textbox.Parent = this; this.Controls.Add(textbox); I also added the Convert Event Handler: public void FormatHorizontalAlignment(object sender, ConvertEventArgs cevent) { switch((string)cevent.Value) { case "Center": cevent.Value = HorizontalAlignment.Center; break; case "Left": cevent.Value = HorizontalAlignment.Left; break; case "Right": cevent.Value = HorizontalAlignment.Right; break; } } This event handler looks right to me. I followed the example from the help files. I've made similar code work with other data types such as booleans being coverted from a T or F in the xml file. DesiredType shows HorizontalAlignment. When I run this code, oddly, the event handler is executed three times. Each time seems to execute correctly. Then I get an unhandled exception from the Application.Run(new Form1()); Error creating window handle. Can anyone tell me what's happening and how to fix it? I foresee I'll have the same problem trying to read the font name and size from the xml file. I have a workaround, but it's very unelegant. Here's the stack trace: System.ComponentModel.Win32Exception: Error creating window handle. at System.Windows.Forms.NativeWindow.CreateHandle(CreateParams cp) at System.Windows.Forms.Control.CreateHandle() at System.Windows.Forms.TextBoxBase.CreateHandle() at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl() at System.Windows.Forms.Control.WmShowWindow(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ScrollableControl.WndProc(Message& m) at System.Windows.Forms.ContainerControl.WndProc(Message& m) at System.Windows.Forms.Form.WmShowWindow(Message& m) at System.Windows.Forms.Form.WndProc(Message& m) at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) at System.Windows.Forms.SafeNativeMethods.ShowWindow(HandleRef hWnd, Int32 nCmdShow) at System.Windows.Forms.Control.SetVisibleCore(Boolean value) at System.Windows.Forms.Form.SetVisibleCore(Boolean value) at System.Windows.Forms.Control.set_Visible(Boolean value) at System.Windows.Forms.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) at System.Windows.Forms.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.Run(Form mainForm) at bindtest.Form1.Main() in d:\development\bindtest\form1.cs:line 109 tia, brian Tag: DataGrid flushing changes to DataSet. Tag: 65336
  - 6
    - Panel Control Question I am stuck on something that must be simple. However, I have been searching the obvious places for several days but haven't come up with an answer: I have a Panel control with a custom designer. The designer creates several designer verbs. When a verb is selected, I want to instantiate a new Panel control on the 'base' Panel control, and allow the designer to edit the new Panel control (i.e., add other controls). The designer verbs work fine. However, if I simply use .Add to add a new Panel to the 'base' Panel the newly added Panel shows up on the UserControl but cannot be edited. On the other hand, if I simply drag a Panel control from the Toolbox to the 'base' Panel I can edit it--which is the behavior I want. The correct way to accomplish so it works this would be much appreciated! Tag: DataGrid flushing changes to DataSet. Tag: 65332
  - 7
    - DataGrid/DataView Display problem I have a dataset table. I have filtered it and created a datview which I use as the datasource to a datagrid. That all works just fine. When I edit cells in the datagrid, then update the dataset table, the datagrid displays both the original row and the modified row. I only want to see the modified row. I have tried playing around with the DataViewRowState property. When I set it to ModifiedCurrent, no row is displayed. What am I doing wrong? Tag: DataGrid flushing changes to DataSet. Tag: 65331
  - 8
    - Forms designer bug Hi I have a simple base form from which I want to inherit the Icon. When I create an inherited form based in this base form, with no added controls, the Icon shows correctly. When I add any control to the form, the designer creates also a resource for an Icon (null icon) and overrides the base form Icon definition. I can correct this behavior manually commenting the me.Icon line, but every time a change a property on any control of that form, the Icon is replaced to a null Icon It is a Bug of the forms designer? Is it reported? Is there a fix Also, does someone knows where we can know of reported Bugs? I have VS 2003 and 1.1 framework Mariano. Tag: DataGrid flushing changes to DataSet. Tag: 65330
  - 9
    - Error- No source code available for the current location I'm getting a "No source code available for the current location" error randomly as I debug my app. Any idea of what may be causing this and suggestions to solve it will be really appreciated. TIA Tag: DataGrid flushing changes to DataSet. Tag: 65322
  - 10
    - mdi child minimized issue Hi, when minimizing child forms in my mdi app the child form is being placed at the lower left hand side of the mdi parent, but is reduced to a small block the size of the close button. No titlebar text is visible and the icon is drawn under the close button. This is really baffling me. Has anyone else seen this? any help is appreciated, jim Tag: DataGrid flushing changes to DataSet. Tag: 65321
  - 11
    - A BMP file has three images in C# project HI I have a question defined as below: * One BMP file has 3 images for a list view control. * Say, this file path is c:\ xyz.bmp. * ImageList object name is smallImageList. * My question is how to put the file path in the C# project. * Then I can see 3 images in the image collection editor by open.... * And, I can refer it as below: this.smallImageList.ImageStream = (ImageListStreamer)resources.GetObject("smallImageList.ImageStream"); Please advice. Peter Tag: DataGrid flushing changes to DataSet. Tag: 65314
  - 12
    - Expamding empty ComboBox problem I have noticed the following problem. If you try to expand the drop-down list of a ComboBox (DropDownStyle=DropDown) with no items and immediately attempt to click another control (displayed underneath the combo box, not sure about other locations), nothing will happen. It takes several mouse clicks before you are finally able to select other dialog controls. My guess is that the combo box gets expanded, but since there are no items, the user does not see the list box portion of it, so if the user tries to click a check box, a button or some other control, this mouse click is obstructed by the expanded (but not visible) list box (this is just a guess, so it may happen for a totally different reason). This is very confusing for the customer, because it appears like the dialog is hanging (i.e. there is no response to the mouse clicks). Is this a known issue? Is there a workaround? Thanks, Alek Tag: DataGrid flushing changes to DataSet. Tag: 65313
  - 13
    - Control's Validating Event and closing a Form We handle the Validating event for textboxes that are contained in a GroupBox, which is contained in a TabControl which is contained in a Form. If Validation on the textbox fails, we do this: e.Cancel = True Now, when we click "X' in the upper right corner, the form closes. We checked the forms closing event, and now e.Cancel = False. Why is e.Cancel = False on the Form close? Tag: DataGrid flushing changes to DataSet. Tag: 65306
  - 14
    - No Touch Deployment Warnings When our smart client is loaded thru the browser, there is a balloon that pops up with the following warning: Microsoft .NET Security Information This application is running in a paritally trusted context. Some functionality in the application may be disabled due to security restrictions. The application works great and is doing everthing it is intended to. The message is annoying and our client is complaining about it. My question is that I want to know if there is a way to disable this without touching the default security settings in the .NET Framework 1.1 Configuration app. The point is not to have the client have to download anything extra to install or have them modify anything. How is this no touch deployment if you do? Thanks Tag: DataGrid flushing changes to DataSet. Tag: 65303
  - 15
    - Preventing user interaction while showing a "wait" cursor I have a form which performs some asynchronous code. I want to display a wait cursor when it starts, and hide the wait cursor when it has completed. This part works fairly well, using: this.TopLevelControl.Cursor = System.Windows.Forms.Cursors.WaitCursor; I also want to prevent user interaction with the controls on my form while the wait cursor is displayed, so that use events (except resize and cancel) are blocked. What is the recommended way of doing this in .NET? Thanks, Aaron Queenan. Tag: DataGrid flushing changes to DataSet. Tag: 65292
  - 16
    - Has an Event been Fired? When a control is clicked multiple events are fired in order. For example, clicking on a combobox dropdown button fires the Enter -> Got Focus -> Click event. In the "Enter" event handler is it possible to find out if the "Click" event is going to happen? I am trying to autoexpand the ComboBox dropdown when the control is entered. Private Sub cboComboBox_Enter(ByVal sender As Object, ByVal e As System.EventArgs) Handles cboComboBox.Enter cboComboBox.DroppedDown = True End Sub But if the ComboBox dropdown button is clicked the Enter event expands the list and the Click event then closes it. In my Enter event handler I was to find out if the Click event is going to happen to decide if I should expand the combo list Example: Private Sub cboComboBox_Enter(ByVal sender As Object, ByVal e As System.EventArgs) Handles cboComboBox.Enter If Not ControlHasBeenClick = True Then cboComboBox.DroppedDown = True End If End Sub Thanks, Hex Tag: DataGrid flushing changes to DataSet. Tag: 65288
  - 17
    - Debugging with Break option in windows forms I am trying to break into the VS debugger on unhandled exceptions in a form. I have tried setting and removing the jit settings in the application config file and in the options dialog. All I get on unhandled errors is the dialog with continue and quit - not with break. Isn't there a way to move from an application with debug build run from within VS to the line raising the exception? I am getting the stack trace info in the dialog which does not help with the condition that I am attempting to debug. Ken Tag: DataGrid flushing changes to DataSet. Tag: 65286
  - 18
    - changing appearance/color of the particular list item Hi everyone. I wonder if we can do this in .net. I want to change the appearance of the particular list items in a checkedlistbox control. Can we change those particular items color for example change forcolor of some items that belongs to some particular category just to highlight them. best regards.. nOor Tag: DataGrid flushing changes to DataSet. Tag: 65285
  - 19
    - Problems with child forms Hello! I've got a problem. When I maximize my mdi and try to open some mdichild forms maximized too, sometimes appears more then one control box. And when i try to close them, it just leave one of them opened, and no way to close it. as it shows in the attachement. Anyone knows what problem is this? -- Cumprimentos, Nuno Monteiro nuno@rcsoft.pt RCSoft - Desenvolvimento de Software, Lda. Telef: 239708708 Fax: 239708701 Tag: DataGrid flushing changes to DataSet. Tag: 65281
  - 20
    - Building My Own DataSource Control hi All, I'm hoping to build my own datasource control, and hoped that someone would point me in the right direction to start. I have already created a class, which accepts a form, a tablename, a connection and a collection of field object (which contain information about which field binds to which form control). I build all this in code, and then the class gets a dataset, binds the controls to it, and allows modifiaction and updates etc. then saves them back to the database. However, I'd like to build a control, which would automate all of this, by getting the fields at design time, and allowing the user to bind the fields and then the user could simply change the connection string at run-time to point to the correct database when deployed. I am trying to kind of replicate the method by which you build bound forms in access. Any pointers to articles, or advice is greatly appreciated. Thanks Alex Tag: DataGrid flushing changes to DataSet. Tag: 65280
  - 21
    - Plz Help.How recall Measure items when Listbox Resizing Dear Sirs. Plz Help me i send this question in 7th - time. I Use OwnerDraw Method in ListBox Component. All Works Fine But i have problem when i resizing the ListBox Component. (need redraw) in List Box OnMeasureItem and OnDrawItem Called when ListBox is Created or when Add new Item. But They are not calling when i resize a listbox. I try in my code: onresize() { listbox1.Invalidate(); } but I have no effect one way is remove and readd all item on listbox. but i have big amount of items and this way is very bad. plz help me how is posible extend exsiting listbox. or i need reimplement full textbox. Thank you in Advance. Irakli Lomidze Tag: DataGrid flushing changes to DataSet. Tag: 65276
  - 22
    - DataGrid column Freeze in visual basic.Net Hi, How can i freeze columns in a datagrid...? I am using a datagrid using data source = an array list which is having DO object.... I want to freeze the columns of datagrid.... tell me the ideas... regards, rajamanickam Tag: DataGrid flushing changes to DataSet. Tag: 65275
  - 23
    - Licensing an assembly with components We are developing an assembly that will expose a multitude of components and controls. Many of them are inherited from one another and some of them represent user controls that group some other controls on them. We need to license all major types. We created a LicenseProvider that works very well by checking the design time license and embeding the runtime license in the result assembly. The problem is that if a user uses a large number of controls a separate license for each type gets embeded in the result making the file larger than needed. Also, the process of running the license check for each type might decrease performance a little. So, my idea was this: to create a special class inside the assembly with a static constructor. This means that everytime the assembly is loaded in one app domain the static constructor will be called. I would then run the license check in the static constructor and set a static value to true or false meaning the license was good or not. Then in each type I can simply check the static value and continue or not. Then, in the end result assembly only one license, corresponding to the special class, will be embeded... Considering that all other security issues are taken care of (sigining the assembly, etc...), does this method present any danger? Can anybody think of any security issues? This assembly will be sold entirely and there will be no licenses per type, but just per the entire assembly so this approach makes sense to me... I was only wondering if anybody might think of a reason why this might not be a good idea Thank you! Iulia Tag: DataGrid flushing changes to DataSet. Tag: 65273
  - 24
    - Legacy Application Reengineering (Basic to C#) We currently have a financial application running on an HP 3000, written in Basic ( the old kind, with line numbers and single-character variable names, etc) with about 500K lines of code. It uses a no-longer-sold, non-relational, HP-proprietary database called Image. This application has many very happy customers, each utilizing it via terminal emulator software in remote locations. We are tentatively architecting a phased migration to a .NET solution, for obvious reasons. Likely, we would first create a cleaner presentation layer based on WinForms, then migrated business logic off the HP3000 to a Win 2003 server ( in C# code), and finally move the database to SQL Server. But.. none of us have experience with a legacy migration/reengineering process (particularly from such an antiquated code base.) Further, given our meager start-up funding level, we cannot afford to hire expensive consultants who specialize in this area. Does Microsoft provide resources with advice on the reengineering process? Whitepapers? Web resources? tools? Also, would anyone recommend good books on this topic? Or any other websites (other than just Microsoft's)? Are there conversion tools to convert Basic to C#? And, my MOST IMPORTANT question (pardon the all caps)... are there "rules of thumb" for estimating programmer resource requirements for migration based on lines of code, database schema complexity, etc.? Thanks, Bruce Tag: DataGrid flushing changes to DataSet. Tag: 65272
  - 25
    - Populate ComboBox with a DataReader Is it possible to populate a ComboBox's DisplayMember and the ValueMember via a SqlDataReader in C#? I know how to do it off of a dataset, but I would rather not incur the overhead since it is just a display field that is used to populate other information from the key value (ValueMember). Larry Tag: DataGrid flushing changes to DataSet. Tag: 65271
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  - 1
    - SYNCHRONISING ALL OPEN FORMS - WINFORMS I have a client-server application using ADO.NET datasets where the user can open several forms - and as many copies of a form as they care to - and edit the data on them. How do you synchronise all the open forms when the user changes a value on the currently active form? For example: * user opens a ViewOrders form which shows a list of Orders including the SupplierName for each Order * user opens EditSupplier form which shows a list of Suppliers * user edits a SupplierName The corresponding SupplierName on ViewOrder form should now change to reflect the edit. I need a general pattern for this - there are hundreds of possible fields the user can edit and any number of different forms could be open - any of which may (or may not) need to be "synchronised". (This sort of behaviour is common in most quality shrink-wrapped software.) cheers Andrew -- **************************************************************************** andrewbingham.com tel 01223 514674 (Cambridge) mobile 07970 161057 fax 07970 601283 email Andrew@AndrewBingham.com DISCLAIMER, PLEASE NOTE: This communication is for the attention of the named recipient only The content should not be passed on to any other person. It is sent in good faith, in confidence, and without legal responsibility. VIRUS CHECK Emails and attachments are virus checked using Norton® AntiVirus® 2002 which is regularly updated. However it remains the recipients responsibility to check emails and attachments sent, or forwarded, from andrewbingham.com for viruses and macro viruses **************************************************************************** Tag: DataGrid flushing changes to DataSet. Tag: 65269
  - 2
    - WinForms / ODBC.net security Using the ODBC.net data provider to access dbase V tables. Everything works fine on the develpment system, but I get a security error on the production system (running XP on both, so MDAC=2.7) here's the code block that generates an UNHANDLED sercurity exception. I'm not sure what type of exception to try to trap here... thought the Security.SecurityException would catch it so I could see what is going on, but it doesn't. I also checked the security rights on the production machine, and to the best I could determine, it has the rights.... but not really sure about this. ' get the information in TALKNET.dbf Private Function GetTalkNetInfo(ByVal connStr As String) As DataSet lbl_usermsg.Text = "Procedure GetTalkNetInfo Retreiving data from TALKNET.dbf: " + "connection string:" + connStr Dim ok As Boolean = True Dim talknetCONN As OdbcConnection = New OdbcConnection() Dim talknetDA As OdbcDataAdapter Dim talknetDS As DataSet = New DataSet() talknetCONN.ConnectionString = connStr Dim talknetQRY As String = "SELECT * FROM TALKNET WHERE THREADID=100" talknetDA = New OdbcDataAdapter(talknetQRY, talknetCONN) Dim talknetCMD As New OdbcCommand(talknetQRY, talknetCONN) Try talknetCONN.Open() talknetDA.Fill(talknetDS, "Talknet") Catch e As OdbcException cRetrnmsg = e.Errors(0).Message & " " & e.Errors(0).Source lbl_usermsg.Text = cRetrnmsg Catch e As Exception cRetrnmsg = " & e.Errors(0).Message & e.Errors(0).Source" lbl_usermsg.Text = cRetrnmsg Catch e As Security.SecurityException cRetrnmsg = " & e.Errors(0).Message & e.Errors(0).Source" lbl_usermsg.Text = cRetrnmsg Finally talknetCONN.Close() End Try Return talknetDS End Function Tag: DataGrid flushing changes to DataSet. Tag: 65261
  - 3
    - DataGrid and Wheel on mouse Using VS 2003, VB.net, msde... I have a databound datagrid that works fine. The form also has several combo boxes that determines what the datagrid displays. When data is displayed, if you highlight a row, or click on a cell, and use the mouse wheel to scroll down, it immediately gives focus to combobox tab stop 1, scrolling down it's options. I would anticipate the wheel to simply scroll down the datagrid (like hitting the down arrow on the scroll bar), not swich to another control and scroll its options. Any idea what is going on and how to prevent this? Thanks! Bob Tag: DataGrid flushing changes to DataSet. Tag: 65260
  - 4
    - WinForms app passes DataSet to remoted type: possible bug Our DAL (Data Access Layer as a dll) is hosted by IIS. We use binary serialization to pass a DataSet into the DAL from a client exe. Our client exe calls GetChanges on DataSet and passes the changes to our remoted DAL. On inserts we have an output parameter for the primary key. After the call to DataAdapter.Update, we watch the insert sproc run and return the output param value. We watch the DataRow change from Added to Unchanged. We watch the source column for output param get set to the outparam's value. The DAL then returns the DataSet to the client exe. Once back in the client exe, the DataRow is still marked as Added and the source column is empty. This is exactly the way it looked when it was sent to the remoted DAL. Now, if we run the DAL locally in a private folder, we see the same results in the DAL. However, back in the client exe the DataRow is marked as Unchanged and the source column contains the output parm value. This leads me to believe there is a bug in the Remoting or ADO.NET architecture. Tag: DataGrid flushing changes to DataSet. Tag: 65248
  - 5
    - Building forms the VS.NET way Does anyone know how VS.NET generates the code for the forms you create? Just a general idea on how it goes from design to code would be really helpful. My interest is in generating forms with my own app, but I need for those forms to be compatible with the VS.NET form designer. The VS.NET form designer has a bad habit of tossing out code it doesn't like. Thanks. Pete -- http://www.petedavis.net Tag: DataGrid flushing changes to DataSet. Tag: 65246
  - 6
    - Re:Re :Is it possible to clear containts of all textboxes on a form by issusing one command TIA Thanks I am already using this form of code I just thought there might have been one command Tag: DataGrid flushing changes to DataSet. Tag: 65245
  - 7
    - events in multithreaded application Hi, I want to create a class that creates a thread internally to do some work. It will interact with winforms using events. What happens when the code that is running in a seperate thread raises an event? Will the code in the event handler that is attached to the event run in the internal thread, or will it run in the GUI thread? The MSDN documentation says that all interaction with the GUI from other threads have to go through an Invoke method. The user shouldn't know that the class used threads internally. If anybody has any ideas, article links etc it would be most apreciated. Thanks, Chris Tag: DataGrid flushing changes to DataSet. Tag: 65240
  - 8
    - Is it possible to clear containts of all textboxes on a form by issusing one command TIA Tag: DataGrid flushing changes to DataSet. Tag: 65239
  - 9
    - datagrid horizontal scrolling Hello: Hope you could help me on this. I have a datagrid with 12 columns. I am displaying 8 columns and then I scroll to the right to see the rest of the columns. When I scroll to see the rest of the columns, the first columns are not visible unless I go back to see them. How can I always see by default the first 4 columns while scrolling to the right or horizontally? Thanks! Nancy. Tag: DataGrid flushing changes to DataSet. Tag: 65238
  - 10
    - PropertyGrid not updating correctly Hi, I've made a class containing a public int and a public Point. I also created a TypeConverter (in fact an ExpandableObjectConverter) supporting InstanceDescriptorInfo. This results in a nice expandable property containing the integer property and an expandable Point property. So far so good. Further I've found out that in order to inform my control that a sub- property has been changed then I have to override GetCreateInstanceSupported and CreateInstance. Now the control catches the updates. However: If I expand the property in the PropertyBrowser like this: -MyClassProp - PointProp X Y IntProp and then enter a new X value and press Enter then the PropertyGrid somehow gets confused and displays something like this: -MyClassProp + PointProp IntProp Y IntProp Ie. the Point-property is collapsed but still partially drawn as expanded! Collapsing and expanding the MyClassProp updates the PropertyGrid. My implementation of CreateInstance is pretty simple: public override object CreateInstance(ITypeDescriptorContext Context, System.Collections.IDictionary PropertyValues) { Point p = (Point)PropertyValues["PointProp"]; MyClassProp mcp = new MyClassProp((int)PropertyValues["IntProp"], p); return mcp; } What am I doing wrong? Or is this a bug in the PropertyGrid? Regards /Claus Tag: DataGrid flushing changes to DataSet. Tag: 65235
  - 11
    - WinApp Deployment Hello All, I am frustrated with the concept of No-Touch Deployment. This was a big marketing aspect of the .NET development model, but there are many ways to do it, and none of them are working for me. The Updater Application Block requires BITS, its own service, a script file, etc. This is a deployment issue to begin with. The 'navigate to an '.exe' file doesn't seem to work on my W2K3 Server, through an ISA firewall. (no idea where the issue is, just nothing happens when I navigate to the URL from my network. It works on the server itself. The server is in my Trusted Zone. I don't want to go opening huge holes without knowing how to approach this). Will W2K3 Server server the EXE over the net by default? Is my ISA Server preventing it? When I do run it on the server itself, I then get security issues related to the fact that my app hits a web service. Is this an effective means of deploying an application that will need to hit the user's hard drive, as well as a database / web service? How would I go about implementing it? Or, am I better to use the Updater Application Block? I have not found any article that details the security side of this, How To, Best Practices, etc. Just a few articles that make it sound so simple. Kevin Tag: DataGrid flushing changes to DataSet. Tag: 65230
  - 12
    - Passing values between 2 Windows Forms (C#) I am wanting to create a Lookup window that receives inputted text, searches a database, shows results, and then returns a key value when the user selects the correct record What is the best way to communicate between 2 windows? For example, in Access, the OpenArgs parameter was available within the Open command Thanks Larry Tag: DataGrid flushing changes to DataSet. Tag: 65228
  - 13
    - DateTimePicker Databound Control I trying to create a Form that is Databound to an underlying Dataset. The Dataset Contains a Date Field which is currently '07/01/2001'; and a Milege rate Field which is '0.345'. When I create the Databound Form and use a Textbox for the Date Field, the Form Fills properly, and I am able to modify the data. However, when I Change the Date Textbox to a DateTimePicker Control, with IDE Generated Databinding. The MileageRate Field, and any other Databound controls on the page become unbound. Any Ideas? Tag: DataGrid flushing changes to DataSet. Tag: 65224
  - 14
    - ValueChanged event NOT being fired when setting NumericUpDown.Value property Hi, I am setting the NumericUpDown .Value property and the ValueChanged event is NOT being fired. Does this ONLY get fired when I change it on the UI and not programatically? Thanks Tag: DataGrid flushing changes to DataSet. Tag: 65202
  - 15
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  - 16
    - when to call dispose()? Hi, I have a form containing controls, a timer, and the EventLog component. I also create some new instances of classes that do not implement idisposable I don't want to leave the tidying up to the GC so... Do I need to explicitly call EventLog.dispose() as in the following snippet? protected overloads sub dispose(byval disposing as boolean) if disposing if components is nothing then components.dispose end if call MyEventLog.dispose(True) <<<-- end if end sub Also how do I make sure that the classes that don't implement idisposable return their memory one I've finished.Do I just close them, or set them to nothing, or what? Help much appreciated Tag: DataGrid flushing changes to DataSet. Tag: 65200
  - 17
    - Crystal Reports: Database connection problem. Highly Urgent Hello All, I have a windows application that is using Crystal reports. The database for the application is located on a different machine than the machine on which the application is running. Currently, we are using the IP address of the database server in the DB connection string. But when the user tries to pull up the reports, there is a request for the login information for the database server. I am completely at a loss to understand as to why this is happening. If anyone can provide any pointers towards this issue, it would be greatly appreciated. Thanks Mithun. Tag: DataGrid flushing changes to DataSet. Tag: 65197
  - 18
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  - 19
    - How recall Measure items when Listbox Resizing Dear Sirs. I Use OwnerDraw Method in ListBox Component. All Works Fine But i have problem when i resizing the ListBox Component. (need redraw) in List Box OnMeasureItem and OnDrawItem Called when ListBox is Created or when Add new Item. But They are not calling when i resize a listbox. I try in my code: onresize() { listbox1.Invalidate(); } but I have no effect one way is remove and readd all item on listbox. but i have big amount of items and this way is very bad. plz help me how is posible extend exsiting listbox. or i need reimplement full textbox. Thank you in Advance. Irakli Lomidze Tag: DataGrid flushing changes to DataSet. Tag: 65189
  - 20
    - Solved: Microsoft Help: IEExe.exe and STA Hi. Thanks for all suggestions. I have finally solved the problem. The System.Windows.Forms.Timer fails because of the UI-operations it executes in my program. So the program crashes when it is being closed. The solution was to replace the System.Windows.Forms.Timer with an implementation of SetTimer and KillTimer. Now it works fine. ... int monitorTimer = SetTimer(this.Handle, 9999, 1000, 0); ... /--- Set timer [System.Runtime.InteropServices.DllImport("user32.dll")] extern static int SetTimer(System.IntPtr hWnd,System.UInt32 iEvent,System.UInt32 iElapse, int iCallbackMustBeZero); //--- Kill timer [System.Runtime.InteropServices.DllImport("user32.dll")] extern static int KillTimer(System.IntPtr hWnd,int iEvent); //--- Timer static static int WM_TIMER = 0x0113; protected override void WndProc(ref Message m) { //--- Check if it is a timer process if (m.Msg == WM_TIMER) { ) base.WndProc(ref m); } br/ peter Tag: DataGrid flushing changes to DataSet. Tag: 65188
  - 21
    - Drag and Drop of OUTLOOK mail items I want to drag and drop of outlook mail items to my form. I want to save the dragged mail item as a ".msg" file. Help? Thanks, Vijaya Krishna P. Tag: DataGrid flushing changes to DataSet. Tag: 65187
  - 22
    - Problems binding control data types to a dataset I've run into a problem with binding form properties to data in an xml file (through a dataset). As it turns out, I can easily bind if the data type of the property on the control is a normal datatype such as a string or integer. If the datatype is not one of the built-in types however, things go horribly wrong. Consider this xml file: <?xml version="1.0" standalone="yes"?> <SettingsData> <one> <Text>Center</Text> </one> </SettingsData> If I create a normal winforms application and add the following code to the form's constructor, it works. I get "Center" in the text box. Here's the code that works: DataSet dataset; dataset = new DataSet(); dataset.ReadXml(@"d:\development\bindtest\form.xml"); TextBox textbox = new TextBox(); Binding binding = new Binding("Text", dataset, "one.Text"); textbox.DataBindings.Add(binding); textbox.Width = 150; textbox.Height = 50; textbox.Top = 50; textbox.Left = 50; textbox.Parent = this; this.Controls.Add(textbox); I hardcoded the size and placement of the text box, but I can easily get that from the xml as well. I encountered a problem when I tried to pull TextAlign from the xml file though. I know that this would require the use of Format, so I implemented that. I changed the xml from above to look like this: <?xml version="1.0" standalone="yes"?> <SettingsData> <one> <TextAlign>Center</TextAlign> </one> </SettingsData> And I changed the code from above to look like this (changed from Text to TextAlign, and added the convert event handler): DataSet dataset; dataset = new DataSet(); dataset.ReadXml(@"d:\development\bindtest\form.xml"); TextBox textbox = new TextBox(); Binding binding = new Binding("TextAlign", dataset, "one.TextAlign"); binding.Format += new ConvertEventHandler(FormatHorizontalAlignment); textbox.DataBindings.Add(binding); textbox.Width = 150; textbox.Height = 50; textbox.Top = 50; textbox.Left = 50; textbox.Parent = this; this.Controls.Add(textbox); I also added the Convert Event Handler: public void FormatHorizontalAlignment(object sender, ConvertEventArgs cevent) { switch((string)cevent.Value) { case "Center": cevent.Value = HorizontalAlignment.Center; break; case "Left": cevent.Value = HorizontalAlignment.Left; break; case "Right": cevent.Value = HorizontalAlignment.Right; break; } } This event handler looks right to me. I followed the example from the help files. I've made similar code work with other data types such as booleans being coverted from a T or F in the xml file. DesiredType shows HorizontalAlignment. When I run this code, oddly, the event handler is executed three times. Each time seems to execute correctly. Then I get an unhandled exception from the Application.Run(new Form1()); Error creating window handle. Can anyone tell me what's happening and how to fix it? I foresee I'll have the same problem trying to read the font name and size from the xml file. I have a workaround, but it's very unelegant. Here's the stack trace: System.ComponentModel.Win32Exception: Error creating window handle. at System.Windows.Forms.NativeWindow.CreateHandle(CreateParams cp) at System.Windows.Forms.Control.CreateHandle() at System.Windows.Forms.TextBoxBase.CreateHandle() at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl() at System.Windows.Forms.Control.WmShowWindow(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ScrollableControl.WndProc(Message& m) at System.Windows.Forms.ContainerControl.WndProc(Message& m) at System.Windows.Forms.Form.WmShowWindow(Message& m) at System.Windows.Forms.Form.WndProc(Message& m) at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) at System.Windows.Forms.SafeNativeMethods.ShowWindow(HandleRef hWnd, Int32 nCmdShow) at System.Windows.Forms.Control.SetVisibleCore(Boolean value) at System.Windows.Forms.Form.SetVisibleCore(Boolean value) at System.Windows.Forms.Control.set_Visible(Boolean value) at System.Windows.Forms.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) at System.Windows.Forms.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.Run(Form mainForm) at bindtest.Form1.Main() in d:\development\bindtest\form1.cs:line 109 tia, brian Tag: DataGrid flushing changes to DataSet. Tag: 65186
  - 23
    - New C# and VB.Net Training Videos. We have placed new training videos on our website: www.vtmag.com Please take a look and donate to our site to help cover our expenses. Please also provide feedback to let us know how we are doing. Thanks, Wade Beasley Visual Training Magazine http://www.vtmag.com Tag: DataGrid flushing changes to DataSet. Tag: 65185
  - 24
    - No Touch Deploy creating EMF's problem Hi, I have a No Touch Deploy application that I want to create and EMF File and serialize it back to the Server via Web Services. When I test the client application running from a local directory (MyComputer zone) it works fine. But when I launch with NTD from my web server I get a Security Exception in the CTOR of the emf. Is there anyway around this. I have tried several of the different CTORs available and the all have thrown the exception. It doesn't make sense that Creating a metafile would be a security violation. I am using the CTORs with a Memory Stream for saving to, so it isn't a FileIO Security issue. Thank You, -- Paul Tag: DataGrid flushing changes to DataSet. Tag: 65179
  - 25
    - CheckedListBox and ItemCheck Event Is there an event similar to ItemCheck, within the CheckedListBox class, that is called after a list item is checked and updated with the new check value? I currently have a method that iterates through the CheckedItems collection of a CheckListBox control. My problem is the CheckedItems collection doesn't have the correct count because of the ItemCheck event occurring before the checked state is changed. Thanks, Lan Tag: DataGrid flushing changes to DataSet. Tag: 65176

Hi all,

I´ve seen around there, that many people have problems forcing the
datagrid control to flush the changes to the DataSet.

To do so, you only have to invoke the CurrencyManager.EndCurrentEdit()
method.

At least this worked for me.

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Re: DataGrid flushing changes to DataSet. by Miha

Miha
Fri Jan 23 03:16:29 CST 2004

Yeah, either that or change CurrencyManager.Position.

--
Miha Markic - RightHand .NET consulting & software development
miha at rthand com
www.rthand.com

"Inaki" <iayucar@yahoo.com> wrote in message
news:7a019fb3.0401230011.72de3498@posting.google.com...
> Hi all,
>
> I´ve seen around there, that many people have problems forcing the
> datagrid control to flush the changes to the DataSet.
>
> To do so, you only have to invoke the CurrencyManager.EndCurrentEdit()
> method.
>
> At least this worked for me.

Top