Datagrid exception

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  - 1
    - bound comboboxes I have three comboboxes on the form. When the record is displayed, all the three combo boxes are blank. If I select a value in the first combo box, and click save, the first value in the other combo box is displayed automatically. However, if I go to the next record and come back, those 2 combo boxes are correctly shown as blank. Is this a known issue? Any workarounds ? Thanks Tag: Datagrid exception Tag: 85045
  - 2
    - WinForm Startup Error I am getting an "'Application' is an ambiguous reference" error when I try to start my WinForms appllication. How can the Application object be ambiguous? Any ideas what I did wrong? Thanks. I am using C# and VS2003. I have declared references: using System; using System.Windows.Forms; using System.ComponentModel; The error occurs in: [STAThread] public static void Main() { try { Global.MainForm = new frmMain(); Application.Run(Global.MainForm); <======== 'Application' is an ambiguous reference SetupSplashScreen(); GetConfigurationData(); if(ValidDB) { InitializeObjects(); } } catch(Exception ex) { MessageBox.Show(ex.Message, "MainForm",MessageBoxButtons.OK, MessageBoxIcon.Stop); } } Tag: Datagrid exception Tag: 85042
  - 3
    - Chart Control for VB.NET? Hello, I need to add charting to my application. I didn't have this need before so I missed the resource kit free offer. How can I get a registration key for the resource kit now? Microsoft said they distributed 750k copies. Help please. /Alexis Tag: Datagrid exception Tag: 85039
  - 4
    - PropertyGrid - TypeConverter (DropDown) - Internet Explorer hosting problem Hi, I have created a Windows UserControl. This Control hosts a PropertyGrid and a Button control. The UserControl project also includes a class called "TestClass" and a custom TypeConvertor class called "DDConv". When the user clicks on the Button control, the application assigns an instance of "TestClass" to the PropertyGrid. The "TestClass" has a property called "CustProp" and it has an TypeConverter attribute assigned to the "CustProp" property. The TypeConvertor points to the "DDConv" class. The PropertyGrid in the UserControl displays a DropDown against the "CustProp" property when the UserControl is hosted in a windows application. When the UserControl is hosted in Internet Explorer, the PropertyGrid does NOT SHOW any DropDown for the "CustProp" property. NOTE: I test the UserControl in Internet Explorer from a virtual directory on my machine. I have set "FullTrust" for the "LocalIntranet_Zone" on my machine. I want the PropertyGrid to display the DropDown in Internet Explorer - can someone help me in figuring out how to acheive the same? 'TestClass.vb Public Class TestClass Dim _name As String Dim _ddProp As String Public Property Name() As String Get Return _name End Get Set(ByVal Value As String) _name = Value End Set End Property <System.ComponentModel.TypeConverter(GetType(DDConv))> _ Public Property CustProp() As String Get Return _ddProp End Get Set(ByVal Value As String) _ddProp = Value End Set End Property End Class 'DDConv.vb Public Class DDConv Inherits System.ComponentModel.StringConverter Dim _values As String() Dim _restrictToList As Boolean Public Sub New() _values = New String() {"Yes", "No"} End Sub Public Overloads Overrides Function GetStandardValuesSupported _ (ByVal context As _ System.ComponentModel.ITypeDescriptorContext) As Boolean Return True End Function Public Overloads Overrides Function GetStandardValues(ByVal _ context As System.ComponentModel.ITypeDescriptorContext) _ As _ System.ComponentModel.TypeConverter.StandardValuesCollection Return New StandardValuesCollection(_values) End Function Public Overloads Overrides Function GetStandardValuesExclusive _ (ByVal context As _ System.ComponentModel.ITypeDescriptorContext) As Boolean Return _restrictToList End Function End Class Thanks & Regards, Dhwanil Shah dhwanil.shah@patni.com -- Message posted via http://www.dotnetmonster.com Tag: Datagrid exception Tag: 85038
  - 5
    - Passing parameters to forms Hi all, I have a function that handles opening child forms in a MDIContainer, I want the child forms to accept a parameter to setup the form when opening. So I simply overloaded the constructor to accept the parameter...that easy enough, however the function that opens the form checks first to see if it's already open and if so just sets focus to that window. Does anybody know how I can setup the form before giving it focus this way? Thanks Gav Tag: Datagrid exception Tag: 85034
  - 6
    - Working with Tabs Hello I'm writing an APP for an PocketPC Because of the small Size of the Display I want to use Tabs! The problem is, if I work with the VS-Designer It puts all Code in one File. I also have to put some code there to prepare Data for Viewing. Thats why I fear that i loose the overview in the file Is there some way to easily split the tabs in extra files and also use the FormDesigner of VS.net? I know I can do everything dynamicly but then I lose the advanteges of the Form Designer. Norbert Tag: Datagrid exception Tag: 85027
  - 7
    - A simple Q: there any performance penalty by extensive data bindin I have like 50 controls from data grid and textboxes bound to a dataset in windows form. Some one told me the extensive data binding will slow down the aplication. Does it really perform slower than manually set the textbox values by "ControName.Text=ValueString"? Tag: Datagrid exception Tag: 85024
  - 8
    - Events in Derived Classes Hi, I am deriving a windows control into a custom class. How can I "re-declare" the events to make them available for use in the new, derived class? I'm using C++ .net, will I will interpret any help I can get. Thanks. . Tag: Datagrid exception Tag: 85017
  - 9
    - Calling parents functions Hi all, Is it possible to call a mdicontainer's function from a child window? Basically I have an function in the main MDIContainer form which opens child forms, it accepts an enumerator to know which form to open, also it checks to see if the form is already open so that it doesn't open it more than once. I want one of my child forms to open a different child form by calling this function. Any help would be great thanks Gav Tag: Datagrid exception Tag: 85013
  - 10
    - How to embed a form in a form? This is what I would like to do: - The splitter window splitting the view to a tree view on the left and entry dialog on the right. The tree view and splitter are easy and it's already done. - It is easy to make a fixed form on the right pane, dock it and enjoy it working. However, I would like the form on the right pane to be dynamic, i.e., depending on a context of the tree view to display different controls and being managed by a different form derived class. In MFC I could accomplish this with child dialogs embedded in a parent dialog and depending on the tree context flipping the child dialogs visible/invisible. I can do the same in .NET by using panels with embedded controls, however, this way everything must be done in the runtime and I lose advantage of designing a forms in a design time and taking advantage of .NET studio wizards. If I could find a way to embed a child form in a parent form, then it would solve my problem. Is it possible? Thanks Tag: Datagrid exception Tag: 85012
  - 11
    - Editing a form in VisualStudio Using Visual C# .NET. I have successfully created my own Windows forms from scratch and been able to view and edit both the code and the designer (i.e. right click on the .cs file in the Solution Explorer pane and select View Code or View Designer.) I'm also modifying existing code, and have also successfully edited existing classes using View Code and View Designer. However, in one particular project there is a folder in which I cannot View Designer for the form class - the only option is View Code. Also, the icon shown is different from the usually forms classes - it's not the gray "control-looking" icon, but the green/white "text-looking" option. Both a .cs and a .resx file exist for form classes in question. This is code I got out of a library and my colleague is able to View Designer on these classes just fine. Any idea what's wrong? Tag: Datagrid exception Tag: 85010
  - 12
    - TreeView Is there a way to make the parent node not display a checkbox but each child node have one? Thank you in advance, Pauly C Tag: Datagrid exception Tag: 85007
  - 13
    - sendmail hangs when I declare an api function I have a simple mailsys solution that works splendidly. I decided to add a listview with file association icons to replace a listbox that displays the full path only of an attachment. But when I add this (which I need to get the file association icons): Private Declare Ansi Function SHGetFileInfo Lib "shell32.dll" (ByVal pszPath As String, ByVal dwFileAttributes As Integer, ByRef psfi As SHFILEINFO, ByVal cbFileInfo As Integer, ByVal uFlags As Integer) As IntPtr The system now runs but hangs once I call sendmail. Without this call in the declarations section above the load event, the system works fine. Any ideas why just having a call like this in the declarations section would hang up sendmail? Thanks for any help. Bernie Yaeger Tag: Datagrid exception Tag: 85006
  - 14
    - How to create Previous/Next Page button on Scrollbar? Hi, is there a property on the VScrollbar to activate this feature or is custom coding required? This feature exists on MS Word's vertical scrollbar and I would like to add this feature to my VB.NET Windows app (to the scrollbar on a DataGrid and a TreeView). Any suggestions? Thanks in advance. Tag: Datagrid exception Tag: 85000
  - 15
    - NativeMethods.POINT/PointToScreen problem hi i am using managed directx/directdraw (i know deprecated) to draw something in windowed mode, and durng flipping the backbuffer i use Control::PointToScreen to flip to the correct place on the screen. using the new clr profiler 2.0 i found out that i have growing NativeMethods.POINT allocations which are connected to Control::PointToScreen (checked that using the allocation graph) not using Control::PointToScreen solves the growing problem. why does that happen? how do i clean up those POINTs? or what other way is there it get a point in screen coordinates? regards florian Tag: Datagrid exception Tag: 84997
  - 16
    - Bind IList to DataGrid Hi, I have an array that I am binding to a datagrid, however I do not want all the columns to be visible (eg the ID). The way to do this, I believe, is to set up a DataGridTableStyle and DataGridColumnStyle, but how do I map my array to the DataGridTableStyle as my array does not have a table name? Thanks, Steve Tag: Datagrid exception Tag: 84995
  - 17
    - how to drag and change datagrid's column? Hi I have my own datagrid for WinForms extended and added some functionality over the normal datagrid. I want users to be able to drag the columns and change its position. For example, drag the 4th column and put it as the 2nd column. Am not sure how to do this. Can anybody give me some hints? rgds KK Tag: Datagrid exception Tag: 84989
  - 18
    - One More Context Menu Question This is a multi-part message in MIME format. ------=_NextPart_000_0048_01C523D0.3007E280 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I want to add a separator bar between sections of the right mouse menu. I want the bar to be horizontal to separate a vertical group of menu = items. I've tried the few methods and combinations thereof but can only create = a column separator bar which at the moment I do not want. ie. Function 1 Function 2 Function 3 Function 4 Function 5 Function 6 Function 7 Any and all help would be appreciated... ------=_NextPart_000_0048_01C523D0.3007E280 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2800.1491" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>I want to add a separator bar between = sections of=20 the right mouse menu.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I want the bar to be horizontal to = separate a=20 vertical group of menu items.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I've tried the few methods and = combinations thereof=20 but can only create a column separator bar which</FONT></DIV> <DIV><FONT face=3DArial size=3D2>at the moment I do not = want.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>ie.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2> Function 1</FONT></DIV> <DIV><FONT face=3DArial size=3D2> Function 2</FONT></DIV> <DIV><FONT face=3DArial size=3D2><U> Function 3</U></FONT></DIV> <DIV><FONT face=3DArial size=3D2> Function 4</FONT></DIV> <DIV><FONT face=3DArial size=3D2><U> Function 5</U></FONT></DIV> <DIV><FONT face=3DArial size=3D2> Function 6</FONT></DIV> <DIV><FONT face=3DArial size=3D2> Function 7</FONT></DIV> <DIV><U><FONT face=3DArial size=3D2></FONT></U> </DIV> <DIV><FONT face=3DArial size=3D2>Any and all help would be=20 appreciated...</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV></BODY></HTML> ------=_NextPart_000_0048_01C523D0.3007E280-- Tag: Datagrid exception Tag: 84987
  - 19
    - Casting classes I want to be sure I understand the rules when casting classes and sub-classes. If I have a class Person and a sub-class Employee that inherits person, then This is not allowed. Why? dim person1 as new person dim emp1 as employee emp1 = person1 But this is. Why? dim person1 as person dim emp1 as new employee person1 = emp1 TIA John Tag: Datagrid exception Tag: 84986
  - 20
    - TabControl and Data binding I've read elsewhere that databound controls on a tab are not actually bound to the datasource until the tab is made visible. I have an IsDirty flag that gets set in the TextChanged, CheckedChanged, etc, events on each of the controls and I'm setting up these event handlers in the form's load event. How can I avoid these events getting called whenever I change from one page to another? Or better yet, is there another event I could use to set the IsDirty flag? I tried the RowChanged event on the underlying DataTable but it wasn't firing. Tag: Datagrid exception Tag: 84985
  - 21
    - Adding to an existing MenuItem's MenuItem Collection Dynamically This is a multi-part message in MIME format. ------=_NextPart_000_0008_01C523C2.6C8F85E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I have a static ContextMenu already built and it works. =20 I am trying to add a submenu (right arrow with a new menuitem list) = dynamically when the popup is created. The new set of menuitems requires some DB queries to be done and then = the menuitems to be added to the Menuitems collection of an existing = menuitem This operation is sensitive to the record that the user has right = clicked, so this dynamic sublist of actions can be different each time = the user right clicks. However while I get the context menu every time the user right clicks, = the dynamically generated submenu only displays once per execution of = the application. Someone must have done this before.....Please Help.....Frustrated.. I have tried to clear the menuitems for the dynamic menuitems collection = on the dispose of the popup event, but dispose is not called and there = is not an event that tells me when this menu is no longer displayed. argghhkd#&#&#&# ------=_NextPart_000_0008_01C523C2.6C8F85E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2800.1491" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>I have a static ContextMenu already = built and it=20 works.  </FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I am trying to add a submenu (right = arrow with a=20 new menuitem list) dynamically when the popup is created.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>The new set of menuitems requires some = DB queries=20 to be done and then the menuitems to be added to the Menuitems = collection of an=20 existing menuitem</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>This operation is sensitive to the = record that the=20 user has right clicked, so this dynamic sublist of actions can be = different each=20 time the user right clicks.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>However while I get the context menu = every time the=20 user right clicks, the dynamically generated submenu only displays once = per=20 execution of the application.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Someone must have done this = before.....Please=20 Help.....Frustrated..</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I have tried to clear the menuitems for = the dynamic=20 menuitems collection on the dispose of the popup event, but dispose is = not=20 called and there is not an event that tells me when this menu is no = longer=20 displayed.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial = size=3D2>argghhkd#&#&#&#</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV></BODY></HTML> ------=_NextPart_000_0008_01C523C2.6C8F85E0-- Tag: Datagrid exception Tag: 84980
  - 22
    - what event is raised? What event is raised when you click on the upper part of a form?(the one with the control box and title...) because it doesn't respond to MouseDown or Click events (they are only raised when I click on the rest of the form). Thank you! Tag: Datagrid exception Tag: 84974
  - 23
    - trying to use System::Drawing I am having difficulty using System::Drawing. I am writing the following in formDlg.h #using <mscorlib #using namespace System How do I include the namespace in my formDlg.h to be able to use System::Drawing without gettignthe errors c2006- expected a filename, found a namespace & c1190-managed target code requires a '#using<mscorlib> and '/clr' option -- davebh - programmer Tag: Datagrid exception Tag: 84972
  - 24
    - Need help in Data grid Hi I am developing a windows application. This contains a Data grid which will populate data from a data table in a Dataset. The application will do some calculation and store the result in the Data table. After the calculation, the result stored in the data table will display in the data grid. When number of rows need to populate in the data table after calculation is around 16000, application will take around 30 seconds to do the whole work. Because of this Data grid population from data table will also take 30 seconds or more. During these 30+ seconds, form will be blank and user cannot do any activity. I like to know, Is there any way to display the calculated rows part by part to the data grid from data table. (Like Buffer.Flush in Asp.net, to display part of the out put to the user). If I am able to display 1000 rows after calculation from data table to the data grid, the user no need to wait for whole calculation to be completed for the out put Give me some reply on this. Thanks in Advance. Umesh Tag: Datagrid exception Tag: 84968
  - 25
    - setting the formatted text for a RichTextBox control Hi, I was wondering if there is a possibility to update the content of a RichTextBox control with a mixture of formatted text (for example bold or underline) containing in one action. I would like to speed things up and use a StringBuilder to store the text and its formatting instead of doing a lot of string concatenations using the SelectedText property. Any ideas? Thanks in advance, Ohad Tag: Datagrid exception Tag: 84967
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  - 1
    - Text Lines/MeasureString Hello, i'm searchin for an easy solution i'v got for e.g. an text that go after measurestring 4 lines This is my Text No i want to read the text of the lines like lines[0] or what ever - there is noc line break. an textbox or richtextbox ios easier no solution. hope someone could help MM Tag: Datagrid exception Tag: 84960
  - 2
    - MessageBox weirdness Whenever I try to show a message box with caption text that includes word "Error", the message box shows only briefly. It doesn't wait for user interaction and just returns DialogResult.No . //This doesn't work properly DialogResult res = MessageBox.Show("Some description.", "Some Error"); //This works just fine DialogResult res = MessageBox.Show("Some description.", "Some Failure"); Can anyone else reproduce this behavior. I'm using Windows 2000 SP4 and .NET Framework 1.1 SP1. Maybe this is just another way Microsoft tries to hide errors from users. :) Primoz Kozuh Tag: Datagrid exception Tag: 84959
  - 3
    - WebRequest and WebResponse not working correctly Dear Sirs, I am using the WebRequest and WebResponse methods to download documents from a webstore, the code is running successfully and the documents are being downloaded but they are corrupted. I have pasted the code below. What am I doing wrong? Regards, Yahya Private Sub GetAttachment(ByVal strAttachmentName As String, ByVal strSrcURI As String) Dim Request As System.Net.HttpWebRequest Dim Response As System.Net.HttpWebResponse Dim MyCredentialCache As System.Net.CredentialCache Dim strPassword As String Dim strDomain As String Dim strUserName As String Dim bytes() As Byte Dim ResponseStream As System.IO.Stream Dim sr As System.IO.StreamReader Dim strDoc As String Dim sw As System.IO.StreamWriter Try strUserName = "user" strPassword = "password" strDomain = "domain" MyCredentialCache = New System.Net.CredentialCache MyCredentialCache.Add(New System.Uri(strSrcURI), _ "NTLM", _ New System.Net.NetworkCredential(strUserName, strPassword, strDomain) _ ) Request = CType(System.Net.WebRequest.Create(strSrcURI), _ System.Net.HttpWebRequest) Request.Credentials = MyCredentialCache Request.Method = "GET" Request.Headers.Add("Translate", "f") Response = CType(Request.GetResponse(), System.Net.HttpWebResponse) ResponseStream = Response.GetResponseStream() sr = New System.IO.StreamReader(ResponseStream, _ System.Text.Encoding.UTF8) 'urn:schemas:mailheader:message-id sw = New IO.StreamWriter("C:\temp\" & strAttachmentName) strDoc = sr.ReadToEnd sw.WriteLine(strDoc) sw.Close() MessageBox.Show("Item stream:") MessageBox.Show("") MessageBox.Show(sr.ReadToEnd()) Response.Close() ResponseStream.Close() sr.Close() Catch ex As Exception MessageBox.Show(ex.Message) End Try End Sub Tag: Datagrid exception Tag: 84958
  - 4
    - SendKeys doesn't send I'm writing an app that sends keystrokes to another app using SendKeys.SendWait(). On some computers some of the time, the call to SendWait() doesn't work. After it's called, the receiving application is sitting there focused and ready to receive the keystrokes (if I press keys, they work) but the keys never come and the sending app blocks infinitely. Like I said it's only on some computers and even on those computers it's only every now and again. There isn't any difference between the computers that it works on and those it doesn't that I can think of. Does anyone now why this is happening? Todd Tag: Datagrid exception Tag: 84955
  - 5
    - Building a Word 2003 Document with XML I have an old product that generates a Word document using Word Automation (tables, pictures, etc). The execution speed is quite slow and I'm finally at the point where I can tell my customers that they HAVE to have Office 2003. That brings me to the potential of building a Word document using the Word XML document schema. Has anyone done that - is this possible? Most of the examples I see don't address building an entire document from scratch. Also, can anyone recommend a good reference of the subject? Thanks in advance! Tag: Datagrid exception Tag: 84953
  - 6
    - GetHeight Error in TextBox Invalid parameter used. Originating In: Single GetHeight(System.Drawing.Graphics) at System.Drawing.Font.GetHeight(Graphics graphics) at System.Drawing.Font.GetHeight() at System.Drawing.Font.get_Height() at System.Windows.Forms.Control.get_FontHeight() at System.Windows.Forms.TextBoxBase.get_PreferredHeight() at System.Windows.Forms.TextBoxBase.AdjustHeight(Boolean returnIfAnchored) at ... Anyone have any idea what is causing this error? It's happening randomly, and most of the time when a window is closing. This one is on a standard text box... Tag: Datagrid exception Tag: 84948
  - 7
    - Which version of the .NET compact Framework am I using? I know how to tell which version I have installed on my mobile device. But I seem to be missing some libraries that I should have on my development pc and I was wondering how I can tell which version of the CF I have installed. Going into Help/About from Dev Studio tells me the .NET Framework version but not the compact version. Thanks. Pat Reddy Industrial Controls Engineer MAVERICK Technologies *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for it! Tag: Datagrid exception Tag: 84941
  - 8
    - Control Data Source Assignment Best Practice I notice that if I assign a data source to a control in VS and necessarily call Fill after the assigment has happened, the form will load very slowly. If I hand-assign the data source after calling Fill, much faster. I assume this is because the control is firing off some event on a per row basis every time a row gets loaded into the dataset. But whatever the reason, what's the best practice here? Using the designer seems like a waste of time if there is such a high performance price. Is there a workaround for this? Thanks! Tag: Datagrid exception Tag: 84940
  - 9
    - listbox problem in vb.net I'm having a problem getting listbox items to show up in VB.NET. I'm using a test program that has one form with a listbox. I'm using this code in the form load event: Dim x As Integer For x = 1 To 50 Me.ListBox1.Items.Add("Item " & x.ToString()) Next x Dim i As Integer i = Me.ListBox1.Items.Count The count property is correct (50), but nothing shows up in the listbox. I can select rows, but all are blank. Any ideas? Tag: Datagrid exception Tag: 84930
  - 10
    - DataGrid adds blank row in typed DataSet I have encountered a strange behavior with the WinForms DataGrid which can be reproduced as follows: 1. Create a new Windows Application 2. Set Form1.IsMdiContainer = True 3. Add a new DataSet named DataSet1 4. Add an new element named Table1 to DataSet1 5. Add two columns named "ID" and "Name" to Table1 in DataSet1 6. Add a new Windows Form named Form2 7. Add a Datagrid to Form2 named DataGrid1 8. Add a DataSet of type DataSet1 to Form2 9. Set the DataGrid1.DataSource = DataSet1 10. Set DataGrid1.DataMember = "Table1" 11. Add the following code in Form1 Load event: Dim f As New Form2 f.MdiParent = Me f.Show() Run the application. Form2 shows up with 2 rows in DataGrid1. One blank row (containing (null) in both columns) and the AddNew row (the one with an asterisk). Where did the first row come from? It has somehow been added to Table1 in DataSet1. If I change the code to not include "f.MdiParent = Me" there is no blank row added, just the AddNew (asterisk) row is shown. Could someone please explain why the blank row is added when Form2 is a MDI child? Tag: Datagrid exception Tag: 84926
  - 11
    - Variable scope and Windows Forms I have a menu that calls another form. I would like to pass the second form a parameter based on the menu item selected. How can I do that?. A public variable in the Menu is unavailable in the second form. Tag: Datagrid exception Tag: 84923
  - 12
    - VB.Net Application Updater I am looking for a way to distrubute my client application. Once I distrubute my application, I will want it to automatically update itself. I will put the new files on the webserver. I have seen examples of this on the web. But none of them are good. Does anyone know any resource where I an get the source code that is pretty much fully working? Thanks, Mark Tag: Datagrid exception Tag: 84922
  - 13
    - Question: ScrollableControl resets position of child Controls I have created new ImageControl : Control which displays an Bitmap image. I placed Image Control inside Panel which has Autoscroll property set to true. then I placed Panel into Frame and made it fill the whole client area. When I run application everything works fine, I can see and use scroll bars to change Location of Image. Here is where the problem is. When I resize the Frame or bring it back and then to Front (regain focus) the location of Image is being reset to (0,0). Here is sequence of events I captured from ImageControl. location change {X=-179,Y=-342} invalidated {X=-179,Y=-342} move {X=0,Y=0} location change {X=0,Y=0} got focus Why is Location of child control is reset to (0,0)? did I make a mistake putting together tree of controls? Any advice would be appriciated. Thanks, Artur. using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; using System.Net; using System.Web; using System.IO; namespace ScrollApp { public class Form1 : System.Windows.Forms.Form { MPanel panel; public Form1() { Uri uri = new Uri(@"C:\image.jpg"); panel = new MPanel(); panel.Dock = DockStyle.Fill; Controls.Add(panel); ImageComponent imgComp = new ImageComponent(uri); panel.AutoScrollMinSize=imgComp.Size; panel.Controls.Add(imgComp); } [STAThread] static void Main() { Application.Run(new Form1()); } } public class MPanel : Panel { public MPanel() { AutoScroll=true; } } public class ImageComponent : Control { byte[] imagedata; public ImageComponent(Uri uri) { SetStyle(ControlStyles.DoubleBuffer|ControlStyles.UserPaint|ControlStyles.AllPaintingInWmPaint, true); WebResponse response = WebRequest.Create(uri).GetResponse(); Stream stream = response.GetResponseStream(); MemoryStream memStream = new MemoryStream(); byte[] buffer = new byte[1024]; int i; while ( (i=stream.Read(buffer, 0, buffer.Length))>0 ) { memStream.Write(buffer, 0, i); } imagedata = memStream.ToArray(); Image img = Image.FromStream(new MemoryStream(imagedata)); Size = new Size(img.Width, img.Height); img.Dispose(); } protected override void OnPaint(PaintEventArgs e) { base.OnPaint (e); Image img = Image.FromStream(new MemoryStream(imagedata)); e.Graphics.DrawImage(img, 0, 0, img.Width, img.Height); img.Dispose(); } } } Tag: Datagrid exception Tag: 84921
  - 14
    - Subclassing the PropertyGrid Folks - I've done some searching on the 'net, and I think I know the answer to my question, but I wanted to pose it anyway, just in case. I'm embarking on a new project, and we're investigating the use of the PropertyGrid. I've used it in a couple of places before, but never in an application that goes out to my general user base. We really like the functionality and capabilities it provides, but some of the display choices are not exactly what we want. Some initial tests of creating an inherited control (and my above-mentioned searching) seemed to show that I'm SOL if I want to override the drawing of the control elements. I really do not want to go through the effort of re-creating the majority of this control just so we can draw a couple of things differently. Any ideas? TIA - Scott Tag: Datagrid exception Tag: 84919
  - 15
    - When is ContainerControl.ParentForm set? From my windows control I want to access a property on its parent form. I would like to do it as soon as possible after the control's creation. The question is: what is the good moment to do this? I tried from OnLoad, and this works fine until the control is put into a tab control. Then I get ParentForm = null. Is there an event that notifies all controls that initialization of everything (or at least Parent properties) has completed? -- Boris Drajer <boris.drajer@do.not.s.p.a.m.micro-bs.com> Tag: Datagrid exception Tag: 84915
  - 16
    - Opacity doesnt work in MDI Hello, I m facing some peoblem in MDI application . Wht i need is .. i hav a 2 MDI child forms ... one of them covers the whole client area and the second one is small one that acts as a magnifier , as i move the small child form over the big one it shld give me the snapshot of the area under this form. before making it MDI child it was working fine .. but after making it MDI child it doesnt hide when i write me.opacity=0 I would appreciate if you could help me solve this problem. Tag: Datagrid exception Tag: 84912
  - 17
    - Acessing Internet Explorer document from contained vb Activex Can someone tell me how to access the Internet Explorer Document from a vb.net usercontrol hosted in this document ? Me.parent, parentform, findform don't seem to work. Thanks . Tag: Datagrid exception Tag: 84908
  - 18
    - MDI Question I've been checking a lot of sources on this, but can't find anything that says whether this can be done or not. Is it possible to have an MDIContainer form with an MDIChild that is also an MDIContainer with child forms of its own? If you could point me to some definitive source on this as well, I'd appreciate that. Thanks! Tag: Datagrid exception Tag: 84907
  - 19
    - How to use NotifyIcon display a bubble message? We can get a bubble message on system notify area when the low disk space. I can do it with the Shell_NotifyIcon Function of Windows Shell. How can I implement it with NotifyIcon class in .NET? Tag: Datagrid exception Tag: 84906
  - 20
    - Instances of an object Is there a way in VB.Net to determine the number of instances of an object? And thier name? e.g. John as Person, Linda as Person, Tom as Person Find out there are 3 instances and thier names...I may want a routine to dispose of any open instances. TIA John Tag: Datagrid exception Tag: 84905
  - 21
    - Pass values back from a modal window This is a multi-part message in MIME format. ------=_NextPart_000_000E_01C52278.275EC7B0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I am a newbie to windows programming (I have been doing web and SQL for = some time). So I have what is probably a very simple question, but of = course I don't know the answer. I have a form, the use clicks a login button, a modal window pops open: Dim objLoginForm As New frmLogin objLoginForm.ShowDialog() They enter a username and password, if it passes validation I want to = pass the user ID back to the parent form and close the modal window. I = can close the modal window, I just can't figure out how to pass back the = UserID. How would I do that?? ------=_NextPart_000_000E_01C52278.275EC7B0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2604" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=3DArial size=3D2>I am a newbie to windows programming (I = have been=20 doing web and SQL for some time). So I have what is probably a very = simple=20 question, but of course I don't know the answer.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I have a form, the use clicks a = login button,=20 a modal window pops open:</FONT></DIV> <DIV> <P><FONT face=3DArial size=3D2>Dim objLoginForm As New = frmLogin</FONT></P> <P><FONT face=3DArial size=3D2>objLoginForm.ShowDialog()</FONT></P> <P><FONT face=3DArial size=3D2>They enter a username and password, if it = passes=20 validation I want to pass the user ID back to the parent form and close = the=20 modal window. I can close the modal window, I just can't figure out how = to pass=20 back the UserID.</FONT></P> <P><FONT face=3DArial size=3D2>How would I do = that??</FONT></P></DIV></BODY></HTML> ------=_NextPart_000_000E_01C52278.275EC7B0-- Tag: Datagrid exception Tag: 84894
  - 22
    - Almost Modal Hi, I want almost modal behavior from a form; any suggestions on how to go about this? I'm writing something Excel-like: the main form has a grid; clicking a cell usually selects the cell, but if there's a dialog up with a text field that expects a cell value, it should instead enter the cell name into the dialog's field. Of course, if it's a true modal dialog, the click gets ignored. If the dialog is just a regular window, the click brings the main form in front of it... Any ideas? Thanks in advance. Peace, --Carl Tag: Datagrid exception Tag: 84892
  - 23
    - Newbie question on VB.Net app Hi, I have a VB.Net Winsows application, the application display a login form(Login.vb) to do user authentication, if valid use application will hide the login form and show another form (MainForm.vb). Here is the code snippet in Login.vb. ' if authentication is good, do the following Dim mform As New MainForm Me.Hide() mform.ShowDialog() ' end code snippet In MainForm.vb , I have a close button. Here is the handler: Private Sub BtnClose_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnClose.Click Me.Close() Me.Dispose() End Sub My question is , when users click BtnClose in MainForm.vb, does the application end? I only hide Login.vb, does .net runtime knows it's not used and close it? TIA Tag: Datagrid exception Tag: 84889
  - 24
    - Window Media Player I have a movie that I am trying to play in the Media Player that is say 400X400. I size the control at design time to 800X600 and at runtime the control resizes itself to 400X400? How can you set the Media Player so that it does not resize itself when the video loads? I tried the stretchtofit property but does not work? VB.Net, Windows Media Player 10 Tag: Datagrid exception Tag: 84886
  - 25
    - A design pattern for managing the activation and deactivation of menus and buttons etc in an application Hi all, Does anyone know of a design pattern to deal with the issue of making UI controls active and inactive according to the context of what the user is doing? I've been thinking about the best way to handle this but the only way I can really think to do it would likely be very messy - trying to deal with it in event handlers. I can imagine that trying to disable and enable buttons and menu items and toolbars for a whole host of ui elements for a whole host of different application contexts could be very messy. Are there any particular approaches that i should be looking at to manage the problem a bit better? Thanks everyone Simon Tag: Datagrid exception Tag: 84879

I have a .NET windows forms application with one form displaying data. I have
a tree view on the left side and the datagrid on the right side. Tree view
allows the user to select verious items and based on that selection the
datagrid is bound to the appropriate datasource and table from the database.
This works well.

The problem comes when I resize my form and the grid portion is not visible
or just barely visible. Now when I perform the same operations by selecting
various items in the tree I get an exception System.ArgumentException with
Message : '0' is not a valid value for 'value'. 'value' should be between
'minimum' and 'maximum'.
Source : System.Windows.Forms. This happens when I call SetDataBinding method.

When I again resize the form so that the grid is more visible this problem
goes away. I have also seen a bizzare display with red cross over the entire
grid area when I resize the grid again.

Is this a known issue in the datagrid ? Can somebody help me ?

Thanks

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