Intermittent NullReferenceException on initialization

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 - No break event on serial port (Pocket PC 2003) Dear all, i'm having an issue while connecting a Pocket PC to a PC through the serial interface. I'm implementing code in C#. When i set the SerialPort breakstate = true, I do not receive a PinChanged (BreakEvent) on the serial port of the Pocket PC. I do receive other PinChanged events (eg CtsChanged, CDChanged, ...) However, when I connect two PC's it works fine. Actually, I want to connect a certain device to the Pocket PC through the serial port. This device generates a Break event, which I need to catch. I'm using the Compact Framework 2.0, which imho supports SerialPort objects. Has anyone had similar problems or has an answer to this problem? Regards, Dries Naudts Code: PC: prt.BreakState = true; PocketPC // pin changed on serial port (device woke up) void prt_PinChanged(object sender, SerialPinChangedEventArgs e) { switch (e.EventType) { case SerialPinChange.Break: if (!bRadio_Awake) { bRadio_Awake = true; prt.RtsEnable = true; System.Threading.Thread.Sleep(50); prt.RtsEnable = false; System.Threading.Thread.Sleep(10); .... Tag: Intermittent NullReferenceException on initialization Tag: 81179
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 - Use cookies as authenticate under wince Hello! I'am working on A Web-based interface that is runing at the HTTPD Server that Windows ce is providing. The system for which the project is build for is an headless device. I developped a authentication system that will check the password on a sqlce database, and then redirect the User on different websites in dependence of the user access rights. It works well, but I have a major security problem! When the login data are checked, I create a cookie that is send to the page to which the user is redirected by response.redirect("xxx.asp").In fact I'm using asp with vbscripts. I want to make at the top of the target site a check of this cookie, to ensure that the user not simply came there by typing the right url. The only problem is that I can't make this cookie_check because the webserver returns me this error: The HTTP headers are already written to the client. HTTP header modifications must be made before writing page content ASP scripting compilation error: '80020009' Description: In file: /Storage Card/ad_bnz_page.asp On line: 2 Here is the corresponding script: <% response.Buffer=true if request.cookies("rights")<>"2" or request.cookies("st")<>"admin" then response.redirect("login.asp?mess=6") end if %> If I remove line 2, the same error will occure at line 3 => response.redirect("....asp") How can I make this check work if the respnse.buffer=true method doen't work? Thx for your help! p.s: The server method I'm using is POST Tag: Intermittent NullReferenceException on initialization Tag: 81178
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 - Frozen non-scrolling columns in DataGrid Does anyone have any ideas as to how to create a frozen/docked non-scrolling column in a compact framework DataGrid. The only idea I have so far is to overlay a second DataGrid on top of the original and somehow synchronize the vertical scrolling? Tag: Intermittent NullReferenceException on initialization Tag: 81176
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 - DateTimePicker with no date selected? I need to have several date fields, but some of these dates may not be known or may never be used, such as dates for pre-trial hearings or pre-pleading report submitted. Is there some nice DateTimePicker control that understands that a date can be null (or just blank)? I guess I can kludge up something such as a checkbox to indicate that a date needs to be entered and then show the datetimepicker but that really is ugly. Tag: Intermittent NullReferenceException on initialization Tag: 81175
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 - Forms not completely disposing... Compact Framework 2 - SP2 Setup the project... Form1 that contains two buttons and an input panel. Form2 that contains one label and an input panel. Form2's constructor has an integer as an parameter. This will be the identifier when the form shows it status message. Everytime the input panel changes enable state the form will popup a messagebox with the id and the panel's state. Form1's buttons are exactly the same in that both will create a variable for Form2 then call the ShowDialog method. The difference is that one will call the dispose method after displaying the form. Setup the problem... When you click either button the Form2 will popup then you can click the OK button. Once you click the button to close the form the messagebox will popup and state "Form2 - 0: False". Close the messagebox. At this point I expect the Form2 variable to be dispose and irrelevant. Enter the problem... Now if you click Form1's input panel you will get a message from the Form2 that states "Form2 - 0: True". At this point you shouldn't be running any code in Form2... Code below... public partial class Form1 : Form { protected int count; public Form1() { InitializeComponent(); count = 0; } private void button1_Click(object sender, EventArgs e) { Form2 dlg = new Form2(count++); try { dlg.ShowDialog(); } finally { dlg.Dispose(); } } private void button2_Click(object sender, EventArgs e) { Form2 dlg = new Form2(count++); dlg.ShowDialog(); } } public partial class Form2 : Form { protected int _id; public Form2(int ID) { InitializeComponent(); _id = ID; label1.Text = "Form2: " + _id.ToString(); inputPanelForm2.Enabled = true; } private void inputPanelForm2_EnabledChanged(object sender, EventArgs e) { MessageBox.Show("Form2 - " + _id.ToString() + ": " + inputPanelForm2.Enabled.ToString()); } private void Form2_Closing(object sender, CancelEventArgs e) { inputPanelForm2.Enabled = false; } } -- Bobby Cannon www.sharpdeck.net Tag: Intermittent NullReferenceException on initialization Tag: 81169
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 - Add Certificate Root Is there are way to add a certificate root via the .NET Compact Framework? I have an application running on a Windows Mobile PocketPC 2003 device. It needs to talk to a Web Service that I have also built. The web service is using SSL with a certificate issued by Go Daddy. The Go Daddy root certificate is not recognized by the PoketPC. I have found the SmartPhoneAddCert (SpAddCert.exe) example from Microsoft, but I would like to be able to add the root cert from my application (so that the end user does not need to go through all the extra steps). I cannot find a way to do this via the .NET Compact Framework. Thank You, kjhealey Tag: Intermittent NullReferenceException on initialization Tag: 81165
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 - soft keys on pocketpc 2003 devices Hi, Does'nt PPC 2003 devices support soft keys like the soft keys on WM PPC devices. I require this kind of a key to support 5-way navigation in my app. The four soft keys on the PPC 2003 are for 'start','landscape','pop-up menu','close'. Theres no other key that opens up the main menu when hit. Can I override the functionality of any of these four keys to make it act as a soft key that opens main menu? Any other idea?? Plz suggest Thanks, Hari Tag: Intermittent NullReferenceException on initialization Tag: 81164
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 - OK key on Treo700 Hi, Ok key on Treo700 closes the active form. But this does'nt happen with my multi-form app. Is this default functionality of the device. If it is, it has to work with my app. Why does it not. If it has to be done explicitly, whats the key char for 'ok'? I could check for that char in the key press and close the form explicitly. Please suggest? Thanks, Hari Tag: Intermittent NullReferenceException on initialization Tag: 81163
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 - Printing spanish charset hi everybody, i've some problems when i try to print certain characters, (á,é,í,ó,ú,ñ), spanish charset. I'm trying to convert the string to ASCII, but only print a "?" for all these characters. i do the following: Encoding.ASCII.GetString(Encoding.Convert(Encoding.Default, Encoding.ASCII, Encoding.Default.GetBytes(Texto))) do you have any idea?, or someone else have any idea for this problem? thanks for all. Tag: Intermittent NullReferenceException on initialization Tag: 81155
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 - CF 2 + Variable with Button function Hi there how i can made this me.variable.backcolor = DrawingSystems.Red me(variable).backcolor = DrawingSystems.Red this dosent work pleas help me thx Mario Tag: Intermittent NullReferenceException on initialization Tag: 81153
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 - Extending the Datagrid to provide scrolling? Hi, I am looking to provide scrolling (noth horizontally and vertically) in a Datagrid using Button controls outside the grid. This is an effort to improve user accessibility due to the small size of the standard scroll bar buttons. I can't see any way to programatically scroll the datagrid and was wondering if I can extend the control in someway to provide this functionality. I have found a forum post which describes how to achieve this using the standard .net Datagrid control using the protected GridVScrolled method. However this does not seem to be available in the CF Datagrid. Any Ideas? Thanks Tag: Intermittent NullReferenceException on initialization Tag: 81151
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 - Custom Splitter I need to create a custom splitter control. It'll function the same, except that it will be thicker, and have an image in the middle. When the splitter is active, it'll change color. Can anyone give some direction? Tag: Intermittent NullReferenceException on initialization Tag: 81147
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 - Programming Hard/Soft Keys with C# in Mobile 5 Question Does anyone have any example C# code for programming one of the hardware keys (or are the called softkeys?) in Windows Mobile 5? I want to program two of the keys to open different Windows in my program. Thanks in advance, nb Tag: Intermittent NullReferenceException on initialization Tag: 81145
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 - .Net framwework and SQL Mobile I received help from the newsgroup last week but I am still getting a message from VB 2005 about something on the PPC not being installed (SQL Mobile or /Net Framework. I'm still getting the message. How can I verify the two components are installed. .Net Framework and the SQL Mobile? Steve Tag: Intermittent NullReferenceException on initialization Tag: 81144
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 - Prepare yourself for ASP.Net Certification Excellent articles/material for web application (ASP.Net). Complete reference available all in one place. You should visit following URL for vast information about web application. http://www.top-itarticles.com/mcsd/mcsdweb.asp Tag: Intermittent NullReferenceException on initialization Tag: 81142
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 - Convert byte[] to Image I have converted an image to byte[] using following code (in VS2005, CF 2.0, WM 2003) byte[] output; MemoryStream ms = new MemoryStream(); inputImage.Save(ms, ImageFormat.Jpeg); output = ms.ToArray(); Now i want to change it back but the code below doesn't work Image newImage; ms2 = new MemoryStream(output, 0, output.Length); ms2.Write(output, 0, output.Length); newImage = Image.FromStream(ms, true); VS2005 says there is no FromStream in "Image". Thanks. Tag: Intermittent NullReferenceException on initialization Tag: 81140
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 - how to disable webbrowser's progressbar/ contextmenu ?? hello, I'm trying to disable the progressbar and the context menu of the webbrowser control. I'm using .net cf2.0 with vb2005. Unfortunately the control shows the progressbar every time a new site is loading... it would be great if I can hide this progressbar! thx Flik Tag: Intermittent NullReferenceException on initialization Tag: 81136
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 - Crypto key pair container protection Hi everyone, I am trying to figure out a way to protect a key pair keystore ( specifically the private key ) similarly to the way the MS CSP does on desktops. The cspParams flag "UseUserProtectedKey" does not seem to be implemented. Specifically, I wish the user to authenticate the use of the private key ( at the CSP level) because the windows mobile platform it seems that any app can use keys in any keystore. Also, where are the machine keys stored on mobiles ? Are they files like on desktops ? Thanks, Using VS5.0 with CF 2.0 on a WM5 PPC device. Tag: Intermittent NullReferenceException on initialization Tag: 81133
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 - Scrollable Panel I need to create a custom scrollbar that when used, it scrolls a panel full of images with checkboxes beside them. In a desktop application, I'd do it with ownerdraw. I guess this is a 2 part question, 1. How would I create my 2 by X list of icon/checkboxes 2. How would I use my custom vertical scrollbar to scroll it? Rick Tag: Intermittent NullReferenceException on initialization Tag: 81132
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 - Framework 3.0 Hi group, I had a VS 2005 pro SP1, with lots of SDK, PPC 2005, WCE 2005, Mobile 2005, PPC 2003, and some framework 3 beta tools, WWF SDK, and may be other tools. I don't remember because it installed them a long time ago. Then, this week, i have to install the new Win FX SDK (WPF/E SDK.msi Feb 2007), and must uninstall old beta tools. I have done this using vs_uninst_winfx.exe. oll works fine and i can make xaml projects. Then i have install Microsoft expression Blend to make animations, all right. Now i come back on an old project on PPC 2005. And the project does not load ! I get 2 error messages when oppening any device project. the errors are in french so excuse me for the translation - (in french in the message box : ) error when extracting data from the user data storage. (in english in the same message :) the system cannot locate the object specified - (in french) impossible to open the project, because it references a device platform that does not exist in your data storage the Pocket PC 2005 project type have disapear from the list of project (when i click on add new project) So i have repair the PPC2005 SDK, and it come back in the list. But it still doesn't work. when i try to create or open any device project i get this two errors. Is there any known problem about this ? is it vs_uninst_winfx that have uninstall too much stuff ? Thank you for your help ! ROM Tag: Intermittent NullReferenceException on initialization Tag: 81130
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 - Value in DataTable not changing when new value assigned VS2005, C#, Win CE 5. I have a very strange problem which must have a simple answer. I am new to .NET. I am reading a simple XML file into a DataSet (1 table, 5 rows, 2 string fields per row). This works ok, I can see the data in the debugger QuickWatch window. I want to change the value of a string field in the DataSet table currently set to "123": MyDataTable.Rows[2].ItemArray[1] = "xyz" It does not change! It is still "123" immediately after this line and no exception. The RowState before and after this line is "Unchanged" How can this be? The DataSet is not read only (and I assume if it was, then an exception would be generated when trying to change the value). Any help extremely welcome. John. Tag: Intermittent NullReferenceException on initialization Tag: 81127
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 - Using Shockwave (not Flash!) in CF2.0 ??? hello, is it possible to show a shockwave file within a CF2.0 (Visual Basic) app? The device runs Windows Mobile 5 (ARM device). I know that there is a plugin for using flash files, but I really think of SHOCKWAVE...! Thanks in advance, Flik Tag: Intermittent NullReferenceException on initialization Tag: 81126
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 - database connectivity question Hi, This is a Mobile question but not really for the compact framework but could be in the future. The situation is this. I have an application that will be running on a PC in a public WiFi hot spot area. People at the WiFi hot spot will access a website that is hosted on a different PC. I will need a database that both the website and the application can access. I dont have control over the public WiFi network only wireless internet access. Should the database be on the webserver or on the application PC or on both and synchronized. What is the best database connection method to use with SQL Express and this scenario? Thanks Tag: Intermittent NullReferenceException on initialization Tag: 81124
 - 24
 - Webbrowser Hi NG, How can I disable the progress bar during to sent via .DocumentText. Thanks for your help. Burghard Tag: Intermittent NullReferenceException on initialization Tag: 81122
 - 25
 - Public Enum no longer public Hi all, We have a public enumeration in one module of our code. It's declared like this: Public Enum CardReaderState as Integer Waiting_For_Card = 0 Card_In_Reader = 1 End Enum (of course, there are enumerations in the real code). All has been working fine in Visual Studio 2003. Now we're slowly migrating to VS2005. One of my collegues is checking out modules and changing small things (making sure all constants are declared with a type, etc) and checking that back into SourceSafe. In the meantime, I'm continuing support for the 2003 version of the program (with the changes he's made). Somtime in the last week or so (and I'm not at ALL convinced that it's related to the 2005 move) modules in my code don't recognize this public enumeration unless I either 1) fully qualify the name of the enumeration (i.e., instead of using CardReaderState.Waiting_For_Card, I have to use sg.modControlBoardComm.CardReaderState.Waiting_For_Card) or 2) I can do an "imports sg.modControlBoardComm" at the top of the other module. I can't figure out why this public enumeration is no longer visible to other modules. I thought that was the whole reason for "public". Help? Tag: Intermittent NullReferenceException on initialization Tag: 81110
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 - Issue using serial communications. I have a simple test application that displays barcode data. The barcode scanner works via serial port communications. I am able to scan about 15 - 20 barcodes successfully then I recieve an incomplete barcode scan (partial data), then the next scan always return no data. After that I'm able to scan another 15 - 20 times correctly, then incomplete scan data followed a scan with no data (and on and on . .). I've tried clearing the buffer after every DataRecieved event, but this seems to have no effect. Can anyone suggest what type of issue I'm running into? This is the code I'm running Private Sub serialPort_DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles serialPort.DataReceived Try Me.Invoke(New EventHandler(AddressOf AddToList)) Catch ex As Exception MsgBox("From DataReceived - " & ex.Message) End Try End Sub Private Sub AddToList(ByVal s As Object, ByVal e As EventArgs) Try Dim strMsg As String = serialPort.ReadExisting.ToString.Trim strMsg = Microsoft.VisualBasic.Right(strMsg, Len(strMsg) - 3) ListBox1.Items.Add(strMsg) serialPort.DiscardInBuffer() serialPort.DiscardOutBuffer() Catch ex As Exception MsgBox("From DoUpdate - " & ex.Message) End Try End Sub Any suggestions or ideas would be greatly appriciated. Dave M. Tag: Intermittent NullReferenceException on initialization Tag: 81109
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 - Newbie Hi, I am trying to move from native to managed code. Usually I developped with MFC/WTL but today I am experiencing .NET. I have a few questions : 1)I am using VS 2005 and for maximum compatibilities I am going to developp with CF 1.0. Will my application run on CF 2.0 ? I suppose so but I prefer to be sure... 2)How do you write code that can work on several resolutions. Let's take an example : In function of which platform my code is running on I am loading a logo that has a different size. Below this logo I put a label and below the label a listview. So how do I resize the picture box in function of my image size? If I use anchor will it automatically place my two other controls below my logo ? Tag: Intermittent NullReferenceException on initialization Tag: 81101
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 - Start external application Hi, I want to start an external application from my C# CF application. The problem is that I only know the name of the application not where the user has decided to install it. How do I find out the path so I can use CreateProcess in coredll.dll to start it. Or maybe there is another solution.. /Broeden Tag: Intermittent NullReferenceException on initialization Tag: 81098
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 - need help using SqlCeResultSet.Seek method... This is a multi-part message in MIME format. ------=_NextPart_000_0007_01C79329.34F6F310 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi there, i'm trying to replace my dataset code to get results and return them = into a=20 sqlCeResultSet but filtered by user entry, eg: Sub GetCustomerList(ByVal g As DataGrid, Optional ByVal search As String = =3D "") Dim ceRs As SqlCeResultSet g.DataSource =3D Nothing g.RowHeadersVisible =3D False g.ColumnHeadersVisible =3D False g.TableStyles(0).MappingName =3D "" cmd.CommandType =3D CommandType.TableDirect cmd.CommandText =3D "Partneri" cmd.IndexName =3D "pnameindex" Try ceRs =3D cmd.ExecuteResultSet(ResultSetOptions.Scrollable) g.DataSource =3D ceRs ceRs.Seek(DbSeekOptions.FirstEqual, New String() {search}) g.TableStyles(0).GridColumnStyles(0).Width =3D 0 Catch ex As SqlCeException MsgBox(ex.Message) Finally ceRs =3D Nothing End Try End Sub but.. it returns me all the results and doesnt filter by my "search" = parameter. Any ideas why? thanks. Paul ------=_NextPart_000_0007_01C79329.34F6F310 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 6.00.2900.2180" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY>Hi there, i'm trying to replace = my dataset=20 code to get results and return them into a sqlCeResultSet but = filtered by=20 user entry, eg: Sub GetCustomerList(ByVal g As DataGrid, Optional ByVal search As String =3D "")     Dim ceRs <FONT=20 color=3D#0000ff size=3D2>As=20 SqlCeResultSet     g.DataSource =3D = <FONT=20 color=3D#0000ff size=3D2>Nothing    =20 g.RowHeadersVisible =3D False <FONT=20 size=3D2>    g.ColumnHeadersVisible =3D False    =20 g.TableStyles(0).MappingName =3D ""     cmd.CommandType = =3D=20 CommandType.TableDirect     cmd.CommandText =3D = <FONT=20 color=3D#a31515 size=3D2>"Partneri"    =20 cmd.IndexName =3D "pnameindex" <FONT=20 color=3D#0000ff size=3D2>    Try <FONT=20 size=3D2>        ceRs =3D=20 cmd.ExecuteResultSet(ResultSetOptions.Scrollable)    =20     g.DataSource =3D ceRs     =    =20 ceRs.Seek(DbSeekOptions.FirstEqual, New String() {search})    =20     g.TableStyles(0).GridColumnStyles(0).Width =3D=20 0     = Catch<FONT=20 size=3D2> ex As=20 SqlCeException        =20 MsgBox(ex.Message)    =20 Finally         = ceRs =3D=20 Nothing     End Try End Sub   but.. it returns me all the results and doesnt filter by my "search"=20 parameter. Any ideas why? thanks. Paul </BODY></HTML> ------=_NextPart_000_0007_01C79329.34F6F310-- Tag: Intermittent NullReferenceException on initialization Tag: 81095
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 - Dialbutton in WindowsMobile 5 Hi all! I'm programming in C#. Does anyone know how to catch dialbutton event in WindowsMobile for Smartphones?? I like to change default phone application to launch my own created one... Thank you! Tag: Intermittent NullReferenceException on initialization Tag: 81091
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 - extending a datagrid using a custom class... hi all, what i really want to do is this, write a class that extends a datagrid, and i want to add a property like "FullRowSelect" when the cell changes to select that row and highlight it.. Imports System.Windows.Forms Public Class DataGridEx : Inherits DataGrid '..where to know? which methods to override?? End Class regards, Paul Tag: Intermittent NullReferenceException on initialization Tag: 81090
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 - Combobox Hi, Do you know any comercial combobox wich can do more than the .net cf? Best regards. Tag: Intermittent NullReferenceException on initialization Tag: 81086
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 - printing PDF's Hi group, Are there some third party tools available to print PDF files (on a limitted set of printers) (VB.NET 2.0) from the .NET compact framework? Thank you Tag: Intermittent NullReferenceException on initialization Tag: 81073
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 - question re: data import from remote SQL to sqlCE database Hi there, i've recently changed my code to use sqlceResultSet with great performance increase but i just had a question in general. Im using an imate JAMIN, and when i connect to remote database, get the sqlDataReader and start looping through it and adding the items to my local table, i notice on certain tables the import speed starts to drop, on some tables more, on others less, can anyone explain this? ex. i have 1 table that imports 400 products and after about 250 records, the import speed slows down and looks like pretty much the same performance as cmd.ExecuteNonQuery compared to the sqlCeResultSet row insert. Could it have anything to do with the datatypes being used in the local tables? Also i'm importing unicode data but i dont think this should make much difference or does it? No other applications are running in the background, and there is plenty of memory (approx 15-20mb free) Any feed appreciated, thanks, Paul Tag: Intermittent NullReferenceException on initialization Tag: 81072
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 - DataGrid Hi, I have a problem with DataGrid. I see it in Tools panel in Data tab, and can drag it into form, but when compiling I got error: Type 'System.Windows.Forms.DataGrid' is not defined. (BC30002) or this error: The type or namespace name 'DataGrid' does not exist in the namespace 'System.Windows.Forms' (are you missing an assembly reference?) (CS0234) I am working with SharpDevelop 2.1.0.2429 with setting "Target framework" -> CompactFramework 2.0 Without DataGrid compiling and run ok on Windows CE. Tag: Intermittent NullReferenceException on initialization Tag: 81071
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 - Change time zone programmatically Hi, Does anyone know how to change the time zone programmatically on windows mobile 2003 and 5? thanks, j Tag: Intermittent NullReferenceException on initialization Tag: 81067
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 - ContactCollection.Restrict how to check for contained string? Hi! How to build in c# a query string to restrict contactcollection to all contacts where firstname starts with specified letters? I like to do something like addressbook research where contacts are filtered from specified letters and so to show all contacts which name starts with 2 / 3 letters. Actually I need to specify the complete name! Thank you Tag: Intermittent NullReferenceException on initialization Tag: 81063
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 - Mantain Width of Form changing of Target Platform Hi. When I change the target platform of a project from Pocket PC 2003 to Windows CE 5.0 it changes the size of a form from 240x268 to 242x293. I want to mantain the width of form when I change the target platform that changes from 240x268 to 240x294. Iago. Tag: Intermittent NullReferenceException on initialization Tag: 81058
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 - Unable to kill application I am writiing an application in c# targeting window mobile 5.0. The project consists of one application(lets call it main) which needs to start another application. I do this using process class. this part works fine. Now when my other application starts, i need to hide it. i do that using this.hide(). Now I need to kill this applicatiion from my main application. which I am unable to do. process.kill, process.close, process.closemainwindowhandle all fail. Even the findwindow and destroywindow doesnt work, since findwindow cannot find my window since its hidden. How can I kill my application from my main application. Please suggest Thanks and regards, Pulkit Sethi Tag: Intermittent NullReferenceException on initialization Tag: 81056
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 - need a scrollable toolbar Hi, I need to add more buttons to the toolbar on the form dynamically. But as the number of buttons increases, the new buttons would be added, but not visible( as it exceeds the width of the form). Is it possible to make the toolbar scrollable, so that I can be able to access the buttons that are added to the right, but are hidden? Thanks, Hari Tag: Intermittent NullReferenceException on initialization Tag: 81052
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 - TabControl Hi, Can someone help me with the following? I am working on a pocket pc. I create a tabcontrol with maximun 5pages. I would like to be able to display only the pages when there are not empty. I mean by that, each page has form and depending on what the user choose he will have 1,2,..or 5 pages displayed. Is it possible in the compact framework? Many thanks for your help. Jess Tag: Intermittent NullReferenceException on initialization Tag: 81051
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 - My program's memory up and down / Windows steadily rising Hi all, I inherited this Windows CE.net application and I've got some strange memory stuff going on. I was using the gc.totalmemoryused function to track the memory used by my program. At the same time I was manually going into Windows to the control panel / system / memory to find out what the program memory used was. I plotted these two numbers on a graph and I can see that while my program's memory used is up and down (as is to be expected with garbage collection), Windows memory is steadily growing over time. I don't understand what's going on. My program is the only thing that is running on this machine so I don't understand why Windows memory is growing. Any ideas of what I could look for, please? Thanks. Tag: Intermittent NullReferenceException on initialization Tag: 81044
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 - Use of GlobalMemoryStatus causes System.NotSupportedException Hi all, I'm using Windows CE.net 4.2 with .NET 1.1. I'm trying to use the GlobalMemoryStatus() subroutine to determine the percentage of memory used for the whole system instead of just my application. I've P/Invoked (at least I think this is what P/Invoking is) using the following: Public Declare Sub GlobalMemoryStatus Lib "coredll.dll" Alias "GlobalMemoryStatus" (ByVal lpBuffer As MEMORYSTATUS) I've also created a structure: Public Structure MEMORYSTATUS Public dwLength As Long Public dwMemoryLoad As Long Public dwTotalPhys As Long Public dwAvailPhys As Long Public dwTotalPageFile As Long Public dwAvailPageFile As Long Public dwTotalVirtual As Long Public dwAvailVirtual As Long End Structure and finally have a variable declared in which to store the information: Public Mem As MEMORYSTATUS When I get to this line in my code: GlobalMemoryStatus(Mem) I receive a System.NotSupportedException error. I'm hoping rebuilding the platform is not the solution becuase that would be a last resort for us. I've found the coredll.lib on my desktop but when I try to add that as a reference in Solution Explorer I'm told that it must be a DLL to be referenced. So I found a DLL but when I tried to reference that Visual Studio told me it wasn't a valid .NET reference. I've looked through my C:\Program Files\Microsoft Visual Studio .NET 2003\CompactFrameworkSDK\v1.0.5000\Windows CE folder and don't see coredll.dll anywhere. Help?!? I have no clue what else to try to enable me to use the GlobalMemoryStatus subroutine Tag: Intermittent NullReferenceException on initialization Tag: 81029
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 - Autocomplete in combobox Hi, How can i do autocomplete in a .net cf combobox? Also: there are any three party product that do it? I am using vs.net 2005 and 2003 ppc. Best regards. Tag: Intermittent NullReferenceException on initialization Tag: 81021
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 - Multiple instances I just had a problem with an application I am working on. I turned out that the problem was that I had two instances of my application running at the same time. I belived that this shouldn't be possible, or is this is wrong? It is a .NET CF 2.0 application running on Intermec 741 with Windows Mobile 2003. Thore Berntsen Tag: Intermittent NullReferenceException on initialization Tag: 81019
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 - How do I delete or garbage collect the unmanaged structure in mana Hi, I'm developing the pocket pc application in which i pass the unsafe structure to c++. i see that if i pass 10 times data strucure it consumes more memory. i have the structure like // .NET structure unsafe public struct Employee { public char* FirstName; public char* LastName; public char* Address; } [DllImport("test.dll")] private static extern int SetEmployeeData(ref Employee item); // C++ Structure struct Employee { BSTR FirstName; BSTR LastName; BSTR Address; } // C++ declaration public int SetEmpoyeeData(*Employee item) [ // do some code } Can anyone please let me know how to delete or garbage collect this data structure in managed code like delete function in c++.? Thanks Tag: Intermittent NullReferenceException on initialization Tag: 81007

Hi

I have an app runing on an XDA IIi , from time to time I ger the
following error on initialization (ie when i start the app)

app.exe
NullReferenceException

at app.frmMain.set_Command3()
at
app.frmMain.InitializeComponent()
at app.frmMain..ctor()
at
System.Reflexion.RuntimeConstructorI
nfo.InternalInvoke()
at
System.Reflexion.RuntimeConstructorI
nfo.Invoke()

...
the application works perfectly after a soft reset,
any ideas?

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Re: Intermittent NullReferenceException on initialization by Jo

Jo
Fri May 18 06:29:17 CDT 2007

On May 16, 11:53 am, Jo <jodiep...@gmail.com> wrote:
> Hi
>
> I have an app runing on an XDA IIi , from time to time I ger the
> following error on initialization (ie when i start the app)
>
> app.exe
> NullReferenceException
>
> at app.frmMain.set_Command3()
> at
> app.frmMain.InitializeComponent()
> at app.frmMain..ctor()
> at
> System.Reflexion.RuntimeConstructorI
> nfo.InternalInvoke()
> at
> System.Reflexion.RuntimeConstructorI
> nfo.Invoke()
>
> ...
> the application works perfectly after a soft reset,
> any ideas?

bump

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