I'm currently building an application in C#, using a basic design I came up with in VB.net for applications involving openGL. Using the Tao framework in VB, I have the following method:
Private Sub checkForGlutInit()
If glut_initialized = False Then
Glut.glutInit()
[code].....
I have created an application using VB.NET in VS2008. When I run the app in the IDE on my development machine it works fine. It also works fine when I build it and run it as an exe on any machine that also has Visual Studio installed (at least 2005 and 2008 anyway) However, when I try to run the compiled executable on any machine without Visual Studio it throws up an error "[program name] has encountered a problem and will close..."
View 5 RepliesIs there a way to call a function everytime it throws an error? I could use try catch, but I need to do it with unexpected errors.
View 8 RepliesI have a piece of code that I believe is the culprit in a "Object reference not set to an instance of an object" error being thrown.[code]
View 4 RepliesYes its me again with yet another problem Ok so I've now gotten round to trying to display some data from my database and displaying it in a DataGridView Heres the critical part
[Code]...
In our code base there is a function which should return either an object or nothing. The exact code is this : Return NothingThe calling method looks something like thismyObj = theClass.function()if myObj <> nothing then // fails
View 1 RepliesI am trying to get the selected rows from a listview. To achieve this, I did this:
Dim numsel As Integer
numsel = Me.ListView1.Items.Count
For countme As Integer = 0 To numsel
[Code]....
It does count the selected rows, but it always throws out the error saying "ArgumentOutOfRange Exception", or something along those lines. For example, if I selected a row, it will output the results of that row. But the loop goes on. I tried everything I can but to no avail. I specifically want to select multiple rows, and I can achieve that if someone can assist me with this simple "problem" I have.
I have a major problem. Things were going great until I came across this little bug(?) which has thrown a stick in my spokes. As I will demonstrate below, it seems that when defining certain numbers Visual Studio will throw an overflow error.
Dim T As ULong = 14774537964905701134 'Overflow error in the IDE
Dim M As ULong = ULong.MaxValue '(18446744073709551615) we are below the maximum value so it should work, right?
The one solution I have found is that we can use the following declaration instead.
Dim T As ULong = ULong.Parse("14774537964905701134")
However, to make matters even more complicated the value in question is unknown and must be compiled using CodeDOM so using the Parse method isn't an option. Unless there is some way I can determine if that value in particular will give me an overflow error.
I recently upgrade a project from vb 6 to 2008. Most of the code runs fine.I have a webbrowser form control that I use to navigate local files and display them with. (i have a file list box that you click which calls the navigate of the browser control). Most file types i have test work fine and display just as they would in a real browser window. Excel, PDFs, etc... so examples of files that utilize "plugins" like acrobat reader inside the browser work great. Tiff files are the exception. No error is thrown in vb, but the browser throws 2 runtime errors, included at the end here. After the browser errors are ignored the program continues execution but will just not display the file.
i can type the path to the file (eg c: estfielsfilename.tif) in a regular browser window and it displays just like it should, inside IE, using a plugin.Prior to upgrading, depending on what was installed on the computer, navigating to a tif would open the tif with picture and fax viewer, or display it with a tif viewer plugin.
Line:1
Error: Invalid Character
when click NO to debug it goes to
Line:0
Error:object expected
I'm trying to compile a brand new 2010 windows forms application with a form and a single button that should display a msgbox with "hello" in it.When I try to compile I get the error message:
Unable to write to output file <filename>: This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms.
The application that I am working on is a Service Desk App. I have a form there that uses a DropDownList that contains employees names coming from the Active Directory. Any employee can make a request and save it. Problem arises when an employee leaves the company and consequently his account is deleted from the Active Directory. When some other employee searches the DB to finds a relevant Service Ticket that could be of his use, when tries to open it an error is thrown that indicates that the name does not exist in the DropDownList items.
UPDATE:I am adding some code so that it can be more clear.
<asp:FormView ID="FormView1" runat="server" DataSourceID="SqlDataSource1"
DataKeyNames="ITRequestId">
<EditItemTemplate>
[code]....
VB.Net MyExcel.Close(SaveChanges:=False) throws an Error
View 7 RepliesI am attempting to list files within a folder on an FTP site. When I run the debugger, I get a clean run the first time with no problems. Subsequent attempts lead to a 550 error: "The remote server returned an error: (550) File unavailable (e.g., file not found, no access)." However, If I step through the process in debugger, It works fine. I'm thinking this is a timeout issue because there are many files within the folder. Any suggestions?
Private Sub ListFTP(ByVal Directory As String)
Dim Req As FtpWebRequest = Nothing
Dim Response As FtpWebResponse = Nothing
[code]....
The application was previously using GlobalMemoryStatus() and MEMORYSTATUS structure to retrieve memory information. But since, the Physical memory of the hardware in which the application runs is more than 2GB, the code was changed to use GlobalMemoryStatusEx() and MEMORYSTATUSEX structure. When this function was implemented and the struture was used its thrown compilation error: "error C2501: 'MEMORYSTATUSEX' : missing storage-class or type specifiers"How to solve this issue???
View 1 RepliesI have an XML file where some of the elements have periods in their names. Using the code below, I receive the error:
"System.ArgumentException: Child list for field Stock cannot be created"It successfully reads the file if the periods are removed( i.e. StockAdjustment instead of Stock.Adjustment)
Dim myXMLfile As String = "C:file.xml"
Dim ds As New DataSet()
Dim fsReadXml As New System.IO.FileStream(myXMLfile, System.IO.FileMode.Open)
Try
[code]....
Is there a way to handle elements with periods in their names?
I have an XML file that looks like
[Code]....
I am trying to delete the song node from the xml file but i can't figure out the cause of the error I'm getting. I'm still learning visual basics. Error: Object reference not set to an instance of an object. This is my code
[Code]....
I have a project with multiple forms that are used to edit tables in a project data source (access DB). All the forms work fine, except the ones that use designer generated lookups.
When I am editing a row in a bound DGV on the lookup forms, they function fine, and the save button works fine. However, once I go to close the form it starts throwing "System.ArgumentException: DataGridViewComboBoxCell value is not valid." multiple times.
I've created applications similar to this in VS2008 without any issues.
I have created a very basic web service in vb.net using vs 2008. When I run the service within visual studio debugger, the service runs fine and gives me the expected results. When I deploy the service to the server and invoke it from a client, it always throws a NullReferenceException error when trying to access the data. More specifically when I call the DbConnection open() method within a dbhelper executeScalar method.
I'm using a custom dbhelper class I found on the web here: [URL] The only thing I've changed is the _factory at the top points to Providers.Odbc (since I'm using a ODBC connection). Like I said previously, the service (and the dbhelper class) work as expected within VS- it's only once I deploy it that it seems to bomb out. I've even tried hard coding the connection string in case it was having problems getting that but no difference there.
I've used this in a couple of places and it simply doesn't work. Despit the try event, VB.Net still crashes or throws up an error.
View 14 RepliesI am writing long text (1K to 2K characters long, plain xml data) into a cell in excel workbook.
The below statement throws COM error Exception from HRESULT: 0x800A03EC
range.set_Value(Type.Missing, data);If I copy paste the same xml manually into excel it just works fine ,but the same does not work progamatically.If I strip the text to something like 100/300 chars it works fine.
At the top of my code for the form I have the following statements (and some other unrelated ones to):
Dim LastDataRow As DataRow
Public Event RowChanged As DataRowChangeEventHandler
When my form loads I run the following line of code:
AddHandler dt.RowChanged, New DataRowChangeEventHandler(AddressOf Row_Changed)
After the form loads I have a FetchData button which connects to the database and brings the records into a datatable object. During this fill operation my Row_Changed event fires (for every record I think) and tries to run DataAdapter.Update(DataTable) (pseudocode) which ultimately fails because I haven't yet created commands. The error I get in my Row_Changed procedure is:
Update requires a valid InsertCommand when passed DataRow collection with new rows.I hadn't even planned to use an InsertCommand at all since I will not be allowing users to insert records from this form. I do plan to allow them to delete or modify existing records, but not insert new ones.run my AddHandler statement after filling the datatable. However, I'm trying to figure out how to rewrite my code so that I can refresh the datatable without closing out the form/application and having to open it up again. I think that's a problem for a separate discussion.
I got the following code from the demo code samples and just changed the textbox names. But it throws an error:
Private Sub Fill_TextBox()
Dim Num As Integer
Dim DSet As DataSet
[code]....
The error is:
System.NullReferenceException:Object reference not set to an instance of an object.
Problem: My programs throw a Trust Relationship error when calling My.User.IsInRole() but only on Windows 7 64 bits. They work on all our Windows XP stations. My code is pretty simple.
With My.User
if .IsInRole("Some Security Group Name") Then
Bla.. Bla.. Bla..
End If
End With
I'm the only one in the company using Windows 7 which we are evaluating to decide if/when we're going to upgrade all our PC's. I am a domain administrator and my PC is in the domain and I'm authenticated. Since I installed Win 7 I haven't had any other authentication issues. The apps are built on .NET 2.0 SP2 I don't know much about our domain setup which is handled by our network administrator but I'm told that the Primary Controller is a Windows 2003 and the Secondary is Windows 2000. He tells me that by default every workstation first authenticate on the Secondary controller if it's available.
Here's the StackTrace
System.SystemException was unhandled
Message="The trust relationship between this workstation and the primary domain failed.
" Source="mscorlib"
StackTrace:
[code]....
I'm new to this and working from a tutorial. I have a variation on the following code:
Dim xDoc As XPathDocument
Dim xNav As XPathNavigator
xDoc = New XPathDocument("xxxxxxx.xml")
xNav = xDoc.CreateNavigator()
However, "CreateNavigator" returns: 'debuggerDisplayProxy' is a type and cannot be used as an expression.This seems like something basic and it's stopping me from continuing with a lot of other stuff that I know works.
This code was put together for a one time run. It's purpose is to count all the pages in a group of images. After about 6000 of 1,250,000 images in ##X it throws an "out of memory" error. Besides it being thrown together for a one time run does anybody see anything obvious that could be causing the error?
CODE:
I have this sort of problem whenever the datatable has an empty cell,it shows cannot find column 6 or depending on the number of the datatable column cell.
View 2 Repliesi published my app. these error showed up. i used some custom buttons on the app by importing the dll. i guess it cant find it after i publish. what can i do.
See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box.
[Code].....
When JIT debugging is enabled, any unhandled exception will be sent to the JIT debugger registered on the computer rather than be handled by this dialog box.
All i wanted to do was make a log in and password this message comes up with in my code
Could not find file 'c:usersandrew l millspaughdocumentsvisual studio 2010ProjectsAJoperatingsystemv1.0AJoperatingsystemv1.0inDebug
'.
It points to Application
Does anyone know the reason as to why I get this message when I run my program?
System.Data.OleDb.OleDbException (0x80004005): Could not find file 'C:Documents and SettingsscalcwLocal SettingsApps2.0DataAHVLJGMO.MHY3R5115QW.D0L axa..tion_5bb7e1304532e016_0001.0000_d272e7bd0b7f2 ff4DataBAPReceiptLog.accdb'.
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I'm receiving the error - Could not find installable ISAM. at the line MyCommand.Fill(DT) in the following code.
What is confusing to me is that I downloaded a sample project for reading data from an Excel workbook in the same way, written in C# that runs fine.
Private Sub exceldata()
Dim filename As String = "C:Documents and SettingsDaveMy DocumentsProgrammingBook1.xlsx"
[Code]....