Error When Opening Another Form?
May 19, 2012
I am creating a simple email application which sends mail from a user's Gmail account, as I haven't worked out how to receive incoming mail yet.I have created a form (frmSignIn) which asks for the log-in info and another (frmComposeMessage) which has all text boxes necessary for composing an email (to, subject, message body).After clicking Sign In on the first form, it should hide it and open the second form, however I get this error:
System.InvalidOperationException was unhandled
Message=An error occurred creating the form. See Exception.InnerException for details. The error is: Object reference not set to an instance of an object.
[code].....
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Jan 15, 2009
Whenever I want to reopen a project that I didn't worked on for several month and want to view my form in design mode I receive following error.
Warning1Method not found: 'Void System.Windows.Forms.Design.ParentControlDesigner.WndProc(System.Windows.Forms.Message ByRef)'.00
[Code]....
I used this project in VB2005 express, but also in VB2008.
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Apr 5, 2011
An error occurred creating the form. See Exception.InnerException for details. The error is: Object reference not set to an instance of an object.
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Jan 6, 2009
I have a button that is supposed to display a form:
[Code]...
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Jul 25, 2011
Is there a better way to make a form with multiple buttons opening different things than having a form that has lots group boxes for each tab. So in the begining each box will be invisible and when you click the button the corresponding group box will become visible. Is there any other way?It will be like a background image and it'll have buttons that will mask it with invisible buttons. when the button is clicked it will open the corresponding group box.
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Jun 7, 2009
In the main form the user can choose to download information from a device.Since this request takes time, when "download information" is pressed I open new form in a separate thread: Private Sub RunDownload()
[Code]...
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Jun 30, 2011
I would like to know the event order of form which is executed while opening form. I am showing my form using following code and the code in form_load event executes twice. Once when the form variables are initialised and second when form is displayed. I want it to execute once only. form showing code:
[Code]...
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Jun 6, 2011
i have two tabs one is expiry date and block. my problem is, when i click block tab for 1st time it will correctly populate the datagridview. but when i click expiry date tab then block tab again, i got this error 'Provided column already belongs to the DataGridView control.'
[Code]...
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Mar 2, 2010
I'm developing vb.net application with mysql as database. The database is on other machine in the network. In one function connection opens and executes query successfully. The same function makes call to other function.This second function tries ot do same thing. But this time while opening connection it gives error-"Access denied for user 'root1'@'AZAR' (using password: NO)". Here 'AZAR' is the name of my machine. The first function uses public variable declared in module for connection, whereas second function uses local variable for connection. I'm using PhpMyAdmin tool.
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Apr 7, 2011
This is my Code
Private Sub ToolStripButton2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ToolStripButton2.Click
Dim OpenFile As New OpenFileDialog
OpenFile.FileName = ""
[code]...
Everything works but if i don't open a file it gives an error
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Aug 13, 2010
I've developed simple selection program which is now complete and in testing. The program has been sent to several users that have all experianced the same error when they run the program.T
PLATFORM VERSION INFO
Windows : 5.1.2600.196608 (Win32NT)
Common Language Runtime : 4.0.30319.1
[code]....
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Jul 2, 2010
I cannot open and read files larger than 32k. This sub is used by both user-dialog and drag-drop operations. Files smaller than 32k are processed without error. Files greater than 32k result in the ErrorOpenFile warning with "Overflow" as the err.Description being displayed.
Public Sub SendFile(ByVal sendFileName As String, terminalWindow As Form)
Const MSG_TITLE = "Send File"
Dim asciiCode As Byte
[code]....
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Sep 28, 2011
I'm receiving an error I can't seem to figure out. I'm opening an image to Photoshop and the highlighted line is the cause. The file opens but closes automatically straight away.[code]...
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Sep 24, 2009
What do you think is wrong with the commented line in my vb.net code below? it returns the error message "member not found".[code]...
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Apr 30, 2009
The program i'm running doesn't seem to open the database in stead I get this error:"A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)"ErrorCode=-2146232060Is there a way to fix this error.
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Jul 10, 2009
I reinstalled my VS2008. But now everytime I open my project this warning always appear. where should i go to avoid this?
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Apr 25, 2012
We have created a dll to convert an excel spreadsheet to a csv file. At the moment we open the xls file, an eror occured (file doesn't exist / is used by an other user)
Used
Dim excel As New Microsoft.Office.Interop.Excel.Application
Dim wb = excel.Workbooks.Open("d:my.xls") '<<<<<<<<<<< not possible to open
wb.SaveAs("d:my.csv", Microsoft.Office.Interop.Excel.XlFileFormat.xlTextMSDOS)
wb.Close(SaveChanges:=False)
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Aug 26, 2009
Dim excel As New Microsoft.Office.Interop.Excel.Application()
Dim wb As Microsoft.Office.Interop.Excel.Workbook = excel.Workbooks.Open(txtFileLocations.Lines(w))
Dim ws As Microsoft.Office.Interop.Excel.Worksheet = TryCast(excel.ActiveSheet, Microsoft.Office.Interop.Excel.Worksheet)
when the program tries to opens an excel file, it always throws me an error "Office has detected a problem with this file. Editing may hard your computer" and my program crushes.......The problem appears on the SECOND line, on DIM wb...blahblah.. i went to the office and unclicked the "protected view" checkboxes.. but it still throws me those errors. my guess is that the office i have in the computer is not the same as the one that my program uses to open excel files (i mean, i loaded/imported some excel.dll files in the program so i guess that will be the one) But how do i make the program not care if the excel file is "potentially dangerous"?
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Jul 26, 2011
[Code]...
when the program tries to opens an excel file, it always throws me an error "Office has detected a problem with this file. Editing may hard your computer" and my program crushes. The problem appears on the SECOND line, on DIM wb.
[Code]...
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Apr 25, 2012
We have created a dll to convert an excel spreadsheet to a csv file. At the moment we open the xls file, an eror occured (file doesn't exist / is used by an other user)
Used code:
Dim excel As New Microsoft.Office.Interop.Excel.Application
Dim wb = excel.Workbooks.Open("d:my.xls") '<<<<<<<<<<< not possible to open
wb.SaveAs("d:my.csv", Microsoft.Office.Interop.Excel.XlFileFormat.xlTextMSDOS)
wb.Close(SaveChanges:=False)
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Apr 13, 2011
I'm trying to open an Excel file to get and set some values. Unfortunately, I have no choice, I must to work with Excel.
Dim xAp As New Microsoft.Office.Interop.Excel.Application
Dim xWkb As Microsoft.Office.Interop.Excel.Workbook
xWkb = xAp.Workbooks.Open("c:uploads este.xls")
Always I have this exception: (Exception from HRESULT: 0x80010105 (RPC_E_SERVERFAULT))
Need I Excel installed in server machine to open Excel files? I don't think so, because when I create a new application and workbook throught code, all things go right, but... its a possibility...
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Dec 19, 2011
I am having problem in opening and viewing data in my SSCE table. There are 3 tables in it, two are working fine but one is causing trouble. I dropped the table and created a new one (same name) but again, the problem is the same.Please see the problem message below:
The select statement:
SELECT [PK], [AdmissionID], [Session], [Medium], [DateEnr], [FeeStatus], GuardianNIC], [FatherOccupation], [FatherIncome], [Cast], [Religion], [MotherName], [Address1],
[code].....
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Dec 21, 2009
When opening an SQLite connection, I get the following error: Here is my complete code:
[Code]...
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Oct 24, 2009
I have an old app, a VB5 front end with access 97 databases all works Ok using the ...program files... folders in XP but I now have a user on Vista and we have problems opening up, and I am braced for problems saving and closing down, if we ever get there.
I sent him a c# applet which found the users folder using string Dpath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
I have moved the data and all settings files to a folder C:Users[Username]AppDataLocal[My app Name][My app data Path]
The start up routine checks a settings file uses the path in the settings to re-attach the front end database to a backend database, test to see if the database uses replication and set the default data path for the rest of the app. we are failing somewhere in here I am sure. I have checked and there are no updateable files in program files
Have I got the wrong path or is there something else I should be looking for?
I have an vs2008 version of the app which is using a similar location but a SQL server database- no problems
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Sep 25, 2009
Error Opening Excel File Read Only ODBC
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Dec 28, 2010
When I attempt to open the visual basic window in PowerPoint 2010 I get the following message:STDOLE2.TBL could not be registered. What causes this and how is this fixed?
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Nov 10, 2010
Whenever I open any VBP file in Visual Basic 6.0, I get Method '~' of object '~' failed error. After that project compiles without any error i.e I can create either EXE or DLL without any error. Originally, all files are Visual Basic 5.0 vbp files and we are converting Visual Basic 5.0 to Visual Basic 6.0. We will be converting to .Net after converting to VB6. Application uses microsoft access as data storage.I am running Windows XP on my machine. I have got .Net 3.5, Jet 3.5 Sp3, Microsoft Office 2003 installed on my machine.
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Jun 11, 2011
I am opening a word document and saving it as html with the following code. If i set the objWord.Visible = False , i get an error: Exception from HRESULT: 0x800A1098 , which i believe indicates there is nothing to open.
Protected Sub btnUpload_Click(ByVal sender As Object, ByVal e As EventArgs)
Dim objWord As Microsoft.Office.Interop.Word.ApplicationClass = New ApplicationClass()
If Not (fUpload.HasFile) Then
[code].....
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Mar 9, 2010
when i double click my dbml file at the solution explorer, I get this error: the operation could not be completed. unspecified error I'm working on a VB.Net project, using visual studio 2008, mssql 2008.
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Jun 11, 2009
A query concerning opening and saving a file.i have two commands, one the opens and another that saves [the same file].i'm using the StreamReader and StreamWriter methods.issue is this:if i comment out the open code, the save works fine.if i comment out the save code, the open works fine.if i let both run together, i get an error, usually with the save saying that the file could not be accessed. note, before anyone asks, i do close the file after saving or opening what could be the problem? open works fine, because it usually happens prior to the save, and then save process cannot access the file..?
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