[VB 2010] InvalidCastException Was Unhandled By User Code
Dec 10, 2011I use this code to populate combobox1&2:
'Main form on load events
Private Sub frm_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
[Code]....
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.net - InvalidCastException Was Unhandled?
Apr 4, 2012Dim CustID As String = txtSrchCustID.Text
Dim FirstName As String = txtNewCustFName.Text
Dim SecondName As String = txtNewCustSName.Text
If CustID And FirstName And SecondName = "" Then
MsgBox("Please enter a term to search by")
EndIf
This returns "Conversion from string "" to type 'Long' is not valid." I was wondering what the error is and how it's possible to fix it? The other questions that I've looked at were mostly to do with variables assigned incorrect types, but I think that isn't the issue. It occurs when all of the variables are empty.
Getting An InvalidCastException Unhandled?
Oct 30, 2009OK, this is going better, now im stuck in the mud again, i am trying to get a form to print,this works now, however i would like to enable a few frames with text boxes for a few seconds to allow the printer to print the text in black instead of gray. he error i am getting is this, as the timer disables:" Unable to cast object of type System.Windows.Forms.Timer' to type 'System.Windows.Forms.ToolStripMenuItem'. "
Public
Sub
Print_Renamed_Click(ByVal
[code].....
InvalidCastException Was Unhandled?
May 15, 2011Private Sub gvDesignGVnote_CellClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles gvDesignGVnote.CellClick
If e.RowIndex < 0 Then[code]......
Error InvalidCastException Was Unhandled
May 17, 2012I am making a simple calculator and it's saying InvalidCastException was unhandled when I try to debug it, here's the code, please tell me whats wrong with it: (and yes I have renamed the textboxes to addequals etc...
Public Class Form1
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs)
End Sub
[code].....
Invalidcastexception Was Unhandled Error
Apr 12, 2012I have some trouble in SMS gateway project using VB.Net (VS 2010)while programme was running, I found error "InvalidCastException was Unhandled", then my programme cannot continue. below I copy the code of the programme :
----------------------------------------------------------------------------------------------------------------------
Option Explicit On
Public Class MessageReceiver
Private TPMessageTime As String
[code]....
VB6 Ocx Visual Studio 2005 VB InvalidCastException Was Unhandled?
Oct 19, 2011I am trying to get a 3rd party activex control which works in VB6 to work in Visual Studio 2005. Using the same exact code I am receiving an InvalidCastException error. Specified cast is not valid.
The code is as follows: AxQIChartControl1.DataTable =
"A-Filler"
AxQIChartControl1.Columns =
"Weight"
AxQIChartControl1.ChartType = 2
[Code]...
When Updating A Record In Database, InvalidCastException Was Unhandled
Apr 25, 2012below is my piece of code where I click on "Edit button" then retrieve the data from access database so that I edit them on a form.
This is what I get when I click on edit: InvalidCastException was unhandled and highlights the line below The UserID contain Alphanumeric characters.
'check for the selected item in list
If lvUsersList.SelectedItems.Count > 0 Then
If Me.lvUsersList.SelectedItems.Count > 0 Then
[Code].....
.net - InvalidOperationException Was Unhandled By User Code
Oct 14, 2011I am trying to save changes made to a list(of xxx) in a function... Am I over looking something because it barfs on the UpdateModel(e) with saying:
[Code]...
IndexOutOfRangeException Was Unhandled By User Code?
Oct 8, 2009i have a string with data when i tried to retrive character by character in a for loop but the size of the string is just 256 but the actual size is more than that... as soon as it passes 256 it throws IndexOutOfRangeException while its printing well in msgbox. I have removed newline, tab using
details = details.Replace(vbCrLf,
"")
[code].....
InvalidOperaionalException Was Unhandled By User Code
Oct 15, 2011I have this problem.. I keep getting this error: Cross-thread operation not valid: Control 'ListView1' accessed from a thread other than the thread it was created on.
Here is my code:
Imports System.IO.Directory
Imports System.IO
Public Class Video_to_Mp3
[code]....
InvalidOperationException Was Unhandled By User Code?
Aug 23, 2010'm tryng to execute code from the DoWork event of a background worker but get the following error:InvalidOperationException was unhandled by user codeCross-threadoperation not valid: Control 'RTB_SndMsg' accessed from a thread other than the thread it was created on.How can i fix this error?
Imports System.IO
Imports System.IO.StreamReader
Imports System.IO.StreamWriter
[code]....
An Unhandled Exception Of Type 'System.InvalidCastException' Occurred In Microsoft.VisualBasic.dll
Feb 26, 2012I'm a beginner to Visual Basic. In here I want to recreate a piggy bank which tells me how much money do I have. I created a function but the program tells me :
[Code]...
Error = NullReferenceException Was Unhandled By User Code?
May 11, 2011Error occuring at line: SqlDataSource3.UpdateParameters("TechID").DefaultValue() = CInt(technicianRow("TechID"))
Here is full VB code:
[code]....
System.MissingMemberException Was Unhandled By User Code
Apr 28, 2010I'm using this code:
[Code]...
VS 2008 Webexception Was Unhandled By User Code?
Apr 9, 2009im running the following bit of code in a background worker and it is coming up with the following error
"The remote server returned an error: (503) Bad sequence of commands."the code is My.Computer.Network.DownloadFile(strFTP & aryfiles(i), My.Settings.strLocalTemp & aryfiles(i), strPUserName, strPPassword, False, 100, True) It runs fine the first time through but 5 mins later when it runs again it always throws this error.
Error : ArgumentOutOfRangeException Was Unhandled By User Code Value Of '-1' Is Not Valid For 'Value'
Mar 27, 2011I Was Coding A Tabbed Web Browser With A Progress Bar In Visual Basic 2010 Express Edition. I Started De-Bugging The Browser When It Pointed To This Sub: Private Sub Loading(ByVal sender As Object, ByVal e As Windows.Forms.WebBrowserProgressChangedEventArgs)
ToolStripProgressBar1.Maximum = e.MaximumProgress
ToolStripProgressBar1.Value = e.CurrentProgress
End Sub
And Showed This Error Message: ArgumentOutOfRangeException Was Unhandled By User Code Value of '-1' Is Not Valid For 'Value'. 'Value' Should Be Between 'Minimum' And 'Maximim'
Null Reference Exception Was Unhandled By User Code?
Feb 19, 2010i develop the following code in vs2005, now i just using this module in my new project @ vs 2008..But this error was araised. I cant able to fix this problem...
Private Sub DataAccess()
Dim errHandle As New ErrorHandler
Dim lobjCommon As New eCopsCommonFunctions
[code].....
Error:"InvalidCastException Was Unhandled Overload Resolution Failed Because No Public '=' Can Be Called With These Arguments
Nov 2, 2010I'm implementing following code in VS2010:
If xl.cells(1, contacolonna).Borders(Excel.XlBordersIndex.xlEdgeRight).LineStyle <> Excel.XlLineStyle.xlContinuous Then
MsgBox("hello")
End If
or following
[code]....
but in both cases VS returns following error:"InvalidCastException was unhandled Overload resolution failed because no Public '=' can be called with these arguments:'Public Shared Operator =(a As String, b As String) As Boolean':Argument matching parameter 'a' cannot convert from '__ComObject' to 'String'. "
Inserting Word Watermark - System.MissingMemberException Was Unhandled By User Code
Mar 8, 2012With oWordDoc
.Activate()
.Sections(1).Range.Select()
.ActiveWindow.ActivePane.View.SeekView = Word.WdSeekView.wdSeekCurrentPageHeader
.Selection.HeaderFooter.Shapes.AddTextEffect(
[CODE]...
It throws at this line...
.Selection.HeaderFooter.Shapes.AddTextEffect(Office.MsoPresetTextEffect.msoTextEffect1, "UNCONTROLLED", "Calibri", 1, Office.MsoTriState.msoFalse, Office.MsoTriState.msoFalse, 0, 0).Select()
This is the error...
System.MissingMemberException was unhandled by user code
Message=Public member 'Selection' on type 'DocumentClass' not found.
Source=Microsoft.VisualBasic
Conversion From String "" To Type 'Double' Is Not Valid - (InvalidCastException Was Unhandled)
Jul 16, 2010why I got the following (InvalidCastException was unhandled) on the following code and how can I solve the problem.
LabelPB.Text = P - Total.Text 'Conversion from string "" to type 'Double' is not valid
Reading From Excel Spreadsheet In VB - Error "InvalidCastException Was Unhandled"
Jan 13, 2011I have just upgraded to Microsoft Visual Basis 2010 Express (Running on Vista and Microsoft Office Excel 2007). The last time I used VB was about 5 years ago and was v5.0 I am trying to do the very simple action of opening a spreadsheet using VB and reading in cell values into two text boxes (I am using an example posted on the web to ensure my approach is correct). The run fails at the point:
[Code]...
System.Data.OleDb.OleDbException Was Unhandled By User Code ErrorCode=-2147217900 Message=Syntax Error In INSERT INTO Statement
Jul 8, 2011I cannot seem to figure out why VB keep throwing me this exception but here is the code
[Code]...
"ExternalException Was Unhandled By User Code"
Jul 21, 2011I'm new to .Net, OOP and this forum but love it!
View 4 RepliesData Type Validation - Get An Invalidcastexception If The User Inputs A String
Nov 25, 2009Im trying to improve some apps ive written, the first is a console app... Im trying to get it so that i wont get an invalidcastexception if the user inputs a string, when the variable is type "Double"
[Code]....
InvalidCastException When Generate Code Via Subsonic With A Web Site?
Dec 10, 2009I'm trying to use Subsonic 3.0.0.3 with an existing web site created in vb.net. I've added a reference to SubSonic.Core.dll and added the ActiveRecord tt/ttinclude files. I also added a contextmenu entry to run the t4 templates using instructions I found here.Whenever I try to run any of the tt files, I receive the following exception. Does this have something to do with me using a web site as opposed to a web application?
f:Documents and SettingsdbollardLocal SettingsTempSQLServer.ttinclude(85,15) : warning CS0219: Compiling transformation: The variable 'parameters' is assigned but its value is never used
ActiveRecord.tt(0,0) : error : Running transformation: System.InvalidCastException: Unable to cast object of type 'Microsoft.VisualStudio.TextTemplating.CommandLine.CommandLineHost' to type 'System.IServiceProvider'.
[Code]...
Error - An Exception Of Type 'System.InvalidCastException' Occurred In FFK.DLL But Was Not Handled In User
Mar 16, 2009I have used the Gridview_PageIndexChanging event in asp.net.i have used the code like this:
gridFileDetails.PageIndex = e.NewPageIndex
During the run time when i clicked the next page,it generates an error:
An exception of type 'System.InvalidCastException' occurred in FFK.DLL but was not handled in user
code
Additional information: Unable to cast
object of type
'System.Web.UI.WebControls.ContentPlaceHolder'
to type
'System.Web.UI.WebControls.GridViewRow'.
in the RowCommand event,I have used the following RowCommand event:
Protected Sub gridFileDetails_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles gridFileDetails.RowCommand
Dim row As GridViewRow = CType(CType(e.CommandSource, Control).NamingContainer, GridViewRow)
[code]....
Fill Textboxs From Dataset, When Executed Following Code Then Got InvalidCastException?
May 4, 2012Private Sub frmbranch_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
Try str = "select * from EnquiryEntry Where EnquiryId=" & EnquiryId & ""
[code]......
VS 2010 Casting Between Derived Types Throws InvalidCastException?
Dec 14, 2010The following Code throws the InvalidCastException error. What I wish to know is why and what the standard workaround is for this situation.
Module Module1
Interface IFooBar
End Interface
Class Foo : Implements IFooBar
Public Shared Widening Operator CType(ByVal Val As Foo) As Bar
Return New Bar
[Code]...
What I would like is the line B = C to work without me having to know what type of object C currently is. I need to find a way to get this to work so that i can finish a function I ma working on so that it will excecute correctly on any new object which implements the interface and boasts an Operator CType function to cast it to the type used in the function.
VS 2010 Code To Create User Profile On New Pc
Apr 26, 2012I am looking for code to create user profiles on new pc without logging them in.I will have admin rights but want to create a default profile for each user and copy some files to each profile before the user logs on the first time/
View 8 Replies