VB 2008 Not A Valid File Name?
Oct 26, 2010
I am getting this error trying to code a connection string between a data set and DataGridView.
I use the Try ... Catch. Upon Catch I MsgBox all the error messages I find to help solve the problem of getting the message "Not a Valid File Name". Without extra help I am blind to what the JET Engine is producing for the path from the path that I give it.
Is there JET Engine attributes that I can access with Visual Basic 2008 at the Catch statement to display what path and file name the JET Engine is producing to get the error? I even get the error with "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:;".
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Nov 17, 2011
I am getting the following errors which i am unable to fix. I dont know where are they coming from... Its urgent , please help me out....
Error4Project file cannot specify more than one ApplicationDefinition element.inventory
Error5The project file contains a property value that is not valid.inventory
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Jun 21, 2011
I wish to add refrence with a dll file.But it fail,it show message 'Make sure dll file is valid assembly or COM component '.I also try use regsvr32 to register it,but also fail.
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Nov 18, 2011
I'm currently creating a text editor (more specifically, a HTML editor). I keep getting the error seen in the picture when I attempt to open a file that I have saved from the program. If I open an HTML file from another text editor, it opens fine.[code]...
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Jun 9, 2011
1.[OleDbException (0x80004005): Not a valid file name.]
2.what is exception stack trace?
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May 26, 2011
I have a form in my VB>NET project (2010) with some ImageList. Those images are embedded in the list with a form resource in a .resx file asdata name="xxxx.ImageStream" mimetype="application/x-microsoft.net.object.binary.base64When I tried to build/run my project I get:
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Sep 27, 2011
I'm attempting to parse a text file containing several Windows paths; I'd like to use regular expressions if possible, and I'm using VB.NET.The file is formatted somewhat like so:
M - Network Mode
C:ClientSystem - System Path
C:ClientProducts - Product Path
[code].....
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Apr 15, 2012
I have a form that validates a users info, address, phone, etc. I want to have the form submit the data only if all of the fields are valid, but haven't had any luck. Right now the fields are able to validate but the form submits the data to the text file regardless of whether the fields are valid or invalid.
Here is my code
Imports System.Text.RegularExpressions
Imports System.IO
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
[Code] .....
How to create an if then statement to only submit the form when the data is valid. I was thinking I might have to set up a separate function but I'm not sure how to set it up really.
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Jun 3, 2009
[Code]...
overcome the ActiveX error Do I need to add a referrence? If not "Registered" how to do it?
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Aug 17, 2009
I am a excel vba developer, and all public functions i would put in the module. I assumed by creating a .vb rather then a module i can put all functions i use regulary throughout forms in this.however i get the error on this code
Function CopyFile(ByVal x As Integer) As String
Dim FileToCopy As String
Dim NewCopy As String
[code].....
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May 8, 2012
I have this issue that occurs with me and driving me crazy i have a report that contains thousands of records and i need to export it to excel , but the excel normal extension .xls
is showing missing records at the end of the file , so i save my file as an .xlsx extension it saves correctly but when i open the file it generates an error
"Excel cannot open the file '<var>filename</var>.xlsx' because the file format for the file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file."but when i test the file i drag it and open it in an empty notepad all the records shows up correctly
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Dec 2, 2011
I get Keyword is not valid as an identifier error on this line
Private Sub Event _service_GetReleasesForProductCompleted(ByVal Sender As Object, ByVal e As EventArgs)
Where as I want to Raise an event [set up events].
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May 21, 2009
I have created a file watcher but I have a problem with the file watcher.here is the
vb.net
Inherits System.Windows.Forms.Form
Private watchfolder As IO.FileSystemWatcher[code]....
And I have the Following error
InvalidOperationException
"Cross-thread operation not valid: Control 'txtmonitor' accessed from a thread other than the thread it was create on."
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Aug 20, 2010
I get this error:
"Conversion from string "7F676981" to type 'Long' is not valid."
When using this
Reader.Position = &HD044
TextBox2.Text = Reader.ReadHexString(4)
TextBox2.Text = CLng(TextBox2.Text)
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Jun 30, 2009
I'm trying to get a database to add a new row on this form. The user types a word into a text box, clicks save, and it should update the database. The table is called "text" for now, it's an Access DB, and it has two rows: ID, and userText. [Code]
I get the error at the da.Update line when I click Save. The full error is "Update requires a valid InsertCommand when passed DataRow collection with new rows." I'm not sure if I have to add an INSERT command somehow or if something in the code needs changing. If I add this line to the Save routine, I get an "Syntax error in INSERT INTO command": Dim cb As New OleDb.OleDbCommandBuilder(da)
I don't know if I should leave that out or keep it in since both give me errors.
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Dec 10, 2009
i've done a search on this error n found no match so i decided to create a new thread.this part of the program is suppose to get the date interval of dd(due date) and dr(date return) n charge the members accordingly.the program opens normally but when i go thru the records i have in my database, conversion from string "" to 'date' is not valid pops up.[code]
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Oct 2, 2009
I have a loop the iterate in my ListBox and I got this error. Cross-thread operation not valid: Control 'ListBox1' accessed from a thread other than the thread it was created on.
Here is my codes:
Private Thread As New System.Threading.Thread(AddressOf myFunc)
Sub myFunc()
Dim i As Integer
[Code]...
My Listbox1 is contain hundreds of lines to loop..thats long iteration. and i need the main form keeps responding from other function even loop is under process. This time i need to use this method of multi-threading.
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Apr 5, 2009
Im trying to work with threading on a project im doing but i have run into this cross-thread problem, ive worked with background workers before and never had this issue.ive done some searching and found some good threads this one in perticular[URL]..now i tried to use these examples and i made it work on a differant project but i cant seem to get my head around how to make it work on this project.
[Code]...
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May 1, 2011
I got a string that is going to be used as a filename. Is there any solution to find and replace non-valid chars with "" so I can use the string as a filename without any problem?
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Oct 15, 2009
This is for visual basic 2008 express edition.Ive been trying to update records from the table of my memrec.dbml and dbase1DataSet.xsd in the visual basic environment.Im not using any sql database server but Im just using the built-in sql server within the visual basic 2008 express.I was able to add records and retreived it to display in the textboxes.My 1st block of codes I used to edit records has an error message which says:NotSupportedException was unhandled - Sql server does not handle comparison of NText, Text, Xml, or Image data types.
My 2nd block of codes I tried to used doesn't have any error and it ables to change the records while at runtime but when you exit the program the changes was not save at all cause when you run it again the records that were changed during runtime goes back to its original records.Let me take you a look at the two blocks of codes
[Code]...
Questions:
1.What do you see as possible cause for having an error in 1st block of codes?What's the remedy for that?
2.For the 2nd block of codes,what is the valid update command to be added in the line in order to save the changes not just during runtime but until you exit the program and run it again?
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Jun 29, 2011
I'm creating an XML file from values contained in a datatable. When I try to write an XML date value, I receive "String not recognized as a valid datetime. The dates that are stored in the datatable column is in this format "yyyymmdd". I tried to use XmlConvert.ToDateTime but I get a warning about the method being obsolete and I'm not sure what serialization mode I should use. How would I format the date from the datatable to MM/dd/yyyy and write to an XML file?
XmlWriter.WriteElementString("Add date", XmlConvert.ToDateTime(dr("Date_Added").ToString.Trim)))
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Jul 29, 2010
I am working on a program that has a combobox that gives you selections for email address endings, but when I try to enter it in as part of the final email address get an error. Here is my
mail.To.Add(TextBox1.Text(ComboBox1.Text))
When I click debug, it give me this error. "Conversion from string "@txt.att.net" to type 'Integer' is not valid."
"@txt.att.net" is the value of the combobox selection.
In the end it should be something like: "anything@txt.att.net"
(Textbox1.text = "Anything" & the current ComboBox1.text selection = "@txt.att.net")
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Mar 4, 2010
I'm trying to delete the 2 last characters of a string if they are "||". This is my
Dim MyReader As Microsoft.VisualBasic.FileIO.TextFieldParser
MyReader = My.Computer.FileSystem.OpenTextFieldParser(playlist)
Dim TextFields As String() = MyReader.ReadFields()
Dim last As String = TextFields.Last
If last.Substring(last - 2) = "||" Then
last.Remove(last - 2)
End If
But it gave me the following error on the highlighted line:
"The converting from the string to the type Double is not valid."
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Nov 30, 2009
I have this requirement in my app. I need to define a week, so for example, I have a GameWeek table. it has weekid(PK),description column. Then I have a GameWeekDay table which has an ID,WeekID (fk to above table), GameDate, isValid (bit field). So once I create a week, I need to select valid days for that week. so I will have a checkbox column for a user to click a day. and on saving, I will save the Date and the checkbox value to my GameWeekDay table. What I need is a clever UI design.
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Oct 10, 2011
Before, my codes are working properly.. But not..I am getting this run time error. What the error means?
Operation is not valid due to the current state of the object.
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Feb 16, 2010
Is it possible for you to loop a block of code until the user provides a valid input? Like, when I click the save button, the program will prompt the user for an integer value, and I would like to validate if the user has inputted a valid value. If the user fails to input a valid value, then the program will re-prompt the same message again until the user inputs a valid value. Eg:
If MsgBox("Add copies to this book?", MsgBoxStyle.YesNo, "Adding Book Copies") = MsgBoxResult.Yes Then
Dim CopyQty As String = InputBox("Amount of copies to generate:", "Add Book Copy")
If IsNumeric(CopyQty) = False or (CopyQty < 1) Then
[code]....
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Aug 13, 2010
I am trying to populate a textbox.text with a value with a record from a datagrid. I can get my value from the datagrid by the following
Dim eRow As Integer
eRow = datagrid.CurrentRow.Index
txtSelecteditem.Text = datagrid.Item(0, eRow).Value
This all works fin when there is a value in the cell it is picking up. However, I hit a problem when this filed is blank.
The error I get is: Conversion from type 'DBNull' to type 'String' is not valid.
How can I get the textbox to populate with null if the field is null.
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Mar 18, 2011
I am trying to get valid data entered in a Windows Form.I simply used bunch of IF and ElseIF statements to set the conditions.
1. Because the field can only accept letters, I need to filter out characters. Eg: !@#$, stuff like that.
2. I need to apply a loop so that the user is prompted to re-enter the data or to have the error message repeat. Right now the error message display once and that's it.I understand the Do Until Loop but my book shows example only on numbers.
Public Class validDataForm
Private Sub validDataForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
[code]....
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Feb 13, 2009
I am trying to write a small app that will read images from an database to an image list. It does the first one, but then after that i get a "Parameter is not valid." exception ... see code below.
vb
Dim cn As New OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Application.StartupPath & "states.qmw")
Dim cm As New OleDb.OleDbCommand("Select * from tblStates", cn)
Dim rd As OleDb.OleDbDataReader
[code]....
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Oct 3, 2009
[Code] If I wanted to add 3 icons, the LV would add them like it normally would, but then, for some reason, it enters the loop again and that's when it throws this error: ex = {"Cross-thread operation not valid: Control 'ListView1' accessed from a thread other than the thread it was created on."}. I don't understand why, because I'm invoking the LV.
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