VS 2008 : Error : Expression Is A Value And Therefore Cannot Be The Target Of An Assignment
Jul 20, 2009
When I have the following code, I get an "Expression is a value and therefore cannot be the target of an assignment." error as shown:
Public Class Form1
'Test Project
Public Structure Blah
Public ID As String
[code].....
But when I change the structure to a class, this works fine:
Public Class Form1
'Test Project
Public Class Blah
Public ID As String
[code].....
What connection am I missing between the two? I don't understand why the first example doesn't work, but the second does. Everything I know says they should both work just fine.
View 11 Replies
ADVERTISEMENT
Jan 12, 2011
Public Sub MoveMouseCursor(ByVal NewMousePoint As Point)
Cursor.Position.X = NewMousePoint
End Sub
Expression is a value and therefore cannot be the target of an assignment.
View 2 Replies
Oct 20, 2009
I am using VB.Net 2008 Express.I am trying to move a button on a form, the button status is unlocked. The code that I want to use is:
Me.btnEnter.Location.Y = 474
However, I get the error message, "Expression is a value and therefore cannot be the target of an assignment" If I now code as follows, I get the error message, "Property access must assign to the property or use its value"
Me.btnEnter.Location.Y
The errors appear contradictory. Just to check, I wrote the following
X = Me.btnEnter.Location.Y
And when run I received the correct answer of 535.What is happening? What am I missing?
View 4 Replies
Mar 14, 2010
If BallOvalShape.FillColor = Ball24.FillColor Then
BallOvalShape.Location.X = 323
BallOvalShape.Location.Y = 536
Ball24.Visible = False
End If
The part i'm getting an error on is
BallOvalShape.Location.X = 323
BallOvalShape.Location.Y = 536
This seems like it should be easy, and should work but I get the error: "Expression is a value and therefore cannot be the target of an assignment" I am placing this within the timmer, I just want to move the object back to it's starting point, is there a better way to do this, or why it's not working?
View 9 Replies
Jun 12, 2011
i am making a program on visual basic 2010 and part of my objective is to calculate the tax, i am trying to calculate the TAX so this is part of my code and this is the only part which gives me errors:[code]
1. Constant cannot be target of an assignment
2. value of type 'string' cannot be converted to 'System.windows.forms.Lebel'.
View 2 Replies
Oct 27, 2010
I have a method that takes an System.Action, this is what I'm trying to feed it:Function() Me._existingImports = Me.GetImportedAds()
The thing is that it complains about the = sign since it thinks I'm trying to do a comparison, which I'm not. I want to assign the Me._existingImports the value of Me.GetImportedAds(), but VB.NET complains about DataTable not having a = operator.
How can I force it to use the assignment operator instead of the equality operator?
In C# this works perfectly fine: () => this.existingImports = this.GetImportedAds()
For now the solution will be to use a standalone method, but that's way more code than needed.
View 1 Replies
Oct 25, 2010
I have a list of items and wish to set one of their properties to a certain value:
applist.ForEach(Function(x) x.PrePaidTypeID = CInt(DBEnums.PrePaidType.NoPrepay))
...but we think this just does a boolean comparison. Is there a way to force VB to assign the integer value rather than compare it?
View 2 Replies
Aug 20, 2010
Error: Trying to revoke a drop target that has not been registered (Exception from HRESULT: 0x80040100 (DRAGDROP_E_NOTREGISTERED))
I am trying to dynamically zoom inout of a pdf document that i'm viewing in a WebBrowser 2.0 control in VB NET 2008. If I navigate to a web URL the following code works fine but if I try the same code while viewing a pdf file the above exception is thrown.
Try
Dim MyWeb As Object
MyWeb = Me.WebBrowserPDF.ActiveXInstance
[code]....
View 6 Replies
Dec 22, 2009
E.g. how do I get VB.Net to statically type a local variable to be the static type of the expression on the right had side of the assignment?
View 1 Replies
Apr 9, 2009
After moving afew things baout on my main form i am getting an error:Expression does not produce a valuein mainly this line of code (various ones are all over my application)
If (checkboxTurnOnDebugging.Checked = True) Then
'Display code for debugging
formDebug.debugTextBox.Text = HTMLResponse
[code].....
View 1 Replies
Feb 3, 2011
IM doing an assignment for college. ITs saving records to a file, and getting them back basically. So really not that hard.
The error is occuring around the following line of
[Code]...
basically all I've been doing so far, is formatting the output fields to show dates correctly. And I believe I'm getting this error. There is data in the form becasue i wrote it there to test it.I think im saving this right, but it seems ODD that its not working for me.
View 1 Replies
Dec 2, 2009
How do i can make my Regular Expression find word without taking a care is it big or small letter?
View 8 Replies
Sep 24, 2011
i already converting to integer, but why still got the error when create new record?Data type mismatch in criteria expression.
red section error
table (da)
field itemcode(integer),description(text),Quantity(integer)
my
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[code]....
View 9 Replies
Apr 11, 2009
I have program, which takes scripts (RGSS) and inserts them into a database. These scripts have lots of quotes and things like that inside them, but I don't think thats the issue here.
The error: Syntax error (missing operator) in query expression
[Code]....
View 4 Replies
Dec 9, 2011
I generally use VB.Net for programming but I have been delegated to a VBA project that would benefit from using script control for running script. Here is sample code but errors out on the .Run line of code. I can do this in VB.Net easy but can't get it to work in vba.
ERROR = Wrong number of arguments or invalid property assignment
Option Explicit
Dim sc As New ScriptControl
Sub RunFunctions()
[code]....
Using the .Eval function from the script control object runs ok in vba but does not run scripts.
Sub SimpleTask()
Dim expr As String
sc.Language = "VBScript"
[code]....
View 2 Replies
Mar 17, 2010
When I'm trying to update or remove record from database I'm getting this error:
Syntax error (comma) in query expression 'Ime='Blagojce', Prezime='', Adresa='', Grad='', Telefonski_br='( ) -', Fax='( ) -', e_mail='''
Here is my connection string:
command.CommandText = "DELETE * FROM podatoci WHERE Ime='" & ime & "', Prezime='" & prezime & "', Adresa='" & adresa & "', Grad='" & grad & "', Telefonski_br='" & broj & "', Fax='" & fax & "', e_mail='" & email & "'"
where ime, prezime and so on are ListView selected items.
View 5 Replies
Nov 2, 2011
I have a .NET application that is shared to around 30 different computers, (mix of 32-bit and 64-bit machines).When compiled, the application is set to target 'Any CPU'.It runs fine on all machines except one that is Windows 7 64 bit.The error message is:
[Code]...
View 1 Replies
May 21, 2010
I've been working on a new application and realised that I want the target framework to be 3.5 (4.0 isn't rolled out yet). So, I changed it and now when I try and debug I get the following error:
"An error occurred creating the form. See Exception.InnerException for details. The error is: Unable to cast object of type 'System.Windows.Forms.SplitContainer' to type 'System.ComponentModel.ISupportInitialize'."
I really don't want to have to delete and recreate the splitContainer....
View 6 Replies
Jan 13, 2009
I am creating a programming that is sending info for one pc to another over RF. The desktop show create a xml file. It writes some of the info but not all. I receive a Target Invocation Exception Error. I realize I need to slow down the incoming Data. I want to use a timer to slow it down.
View 4 Replies
Aug 22, 2009
what is this error " Exception has been thrown by the target of an invocation."the code is :
Private Sub Button10_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button10.Click Button10.Enabled = False
Label19.Text = "Checking for updates .... "
WebClient1.DownloadFileAsync(New Uri("http://www.fileden.com/files/2009/8/20/2549735/virson1.txt"), "virson1.txt")
End Sub
[Code]...
View 2 Replies
Oct 1, 2009
It errors often (not in a system damaging way) but enough that it bothers me.
Code
Public Shared Sub Fire(ByVal thisEvent As [Delegate], _
ByVal ParamArray args() As Object)
[code]....
Common Error
User Message: Async event fire error.
Error Type: System.Reflection.TargetInvocationException
Error Message: Exception has been thrown by the target of an invocation.
[code]....
View 1 Replies
Apr 5, 2008
I'm trying to make the transition from VB6 to VB Express edition 2008.I'm using the OneClick publish the 2008 IDE provides.It appears to build and package the app. I can upload it to my website for distribution.But when the app is downloaded and instaleld on a Vista OS target system, the following error happens:Unable to install or run the application.The application requires that assembly stdole Version 7.0.3300.0 be installed in the global assembly cache (GAC) first.I checked the system that the app is built on..XP..and the stdole file version is 7.0.9466.1.I searched for stdole* on the Vista box using "Computer", "OS","Local Hard Drives(C,D)) and although there are numerous stdole32.tlb and stdole.tlb, there are no stdole. dll files.The stdole.dll file is listed in the application files list on the publish tab of the OneClick dialog.is the stdole.dll problem on the XP dev system or on the Vista target system?The Vista system always gets the latest updates as does the XP system.
View 7 Replies
Oct 15, 2011
i am working on a microwave app its very important anyways ill give up what code ive got so far and such but when i try to run it i get this error message: Visual Studio cannot start debugging because the debug target Microwave.exe is missing Please build the project and retry or set the OutputPath and AssemblyName properties appropriately to point at correct location for the target assembly. [Code]
View 5 Replies
Feb 10, 2010
I'm using visual studio express 2008, I wrote my code for a project and then when I tried to debug it I got a few errors but one main one that says this. Visual Studio cannot start debugging because the debug target "".exe is missing Please build the project and retry, or set the output path and assembly names appropriately to point at the correct location of the target assembly. Since this is my first time debugging a program with this particular instance of the program, I am in shock. Does anyone know how to fix this issue?
View 6 Replies
Mar 25, 2012
I'm trying to update data to a Access data base using the following [code]...
View 3 Replies
Jul 18, 2008
This is not a homework of mine and i had never tried ms access database with vb so i just gave it a shot. so this is my first time and i am just trying not asking anyone to complete my homework. I have been searching for this a lot on internet but couldn't find a solution to this so i decided to ask this question here.
i have this sql code. what i want to do is that create a basic login form where users puts it's username in the UsernameTextbox and Password in the PasswordTextbox. If the the information match then a message box appears saying that the user is valid and if the information does not exist, a mesage box appears saying the users is not valid. now everytime i execute(run) the code, i come up with this error: Syntax error (missing operator) in query expression ''UserName' = 'Admin' 'PassWord' = 'testing123''.
The field names(UserName, PassWord) are also correct they are same as in the database. the information put in the username and password textbox are correct and they match the information on the database. But i dont know why this error comes up.
My code module is the following:
Imports System.Data.OleDb
Public Class LoginForm1
' Cancel button
Private Sub Cancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Cancel.Click
Me.Close()
End Sub
[CODE]...
View 5 Replies
Oct 27, 2009
So Im doing this calculator and i got everything working well. The only thing Im having trouble with is getting it to allow multiple actions before assignment. What i mean by that is . Instead all i can do is (number * number=) does not let me do another before assigningCalculator
Public Class Form1
Dim abp As Boolean
Dim number1 As Double
[code].....
View 3 Replies
Jul 14, 2009
[ERROR]
System.Net.Sockets.SocketException:No connection could be made because the target machine actively refused it 192.168.0.59:500 at system.Net.Sockets.TCPClient.Connect(String hostname, Int32 port) at WinClient.Form1.btnSignIn_Click(Object sender, EventArgs e)
[/ERROR]
Though I dont believe the issue is with the code here it is:[code]......
View 3 Replies
Jul 28, 2011
i use a database in access and I use a query for adaptor and dataset.
The query is next:
Select * from table1, table2 where table1.idsomething=table2.id and table2.name= 'Name1' AND datebirth>=#07.25.1988# AND datebirth<=#07.31.1988# order by datebirth asc
The error is: Syntax error in date in query expression
In the database the format date is dd-mm-yy.Why I have this problem? What is wrong at the query?
View 7 Replies
Sep 24, 2010
I am creating a VB 2008 change calculator as an assignment. The program is to use the amount paid - the amount due to calculate the total.(this is working fine). After that, it is to break that amount down into dollars, quarters, dimes, nickels, and pennies. The problem I am having is that sometimes the quantity of pennies, nickels or dimes will be a negative number. For example $2.99 = 3 Dollars and -1 Pennies.
Option Explicit On
Option Strict Off
Option Infer Off
[code]....
View 5 Replies
