Cannot Evaluate Expression Because Code Of Current Method Is Optimized
Oct 15, 2008
In debug mode I get into a line that evaluates to false because the expression cannot be evaluated because of "Cannot evaluate expression because the code of the current method is optimized." Program does not assert or error out. If Item.Length then . . . (Here when I hover the mouse it displays "Cannot evaluate expression because the code of the current method is optimized"). What interesting is that it only occurs in one of .vb files.BTW, I'm programming in Compact Framework.
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Oct 12, 2009
I am trying to create a procedure which will evaluate a string expression as if it were a line of code...Kind of like what a graphing calculator does when you enter a formula. Does anyone have any experience with this in VB? I have an example of C++ code which uses CodeDom, but I am a bit rusty with my C++!
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Apr 24, 2012
I am using a class to check for certain words in my application to prevent SQL Injection. In the class, there is a for loop that tries to match a specific word with the words from a blacklist. If there is a match, I must redirect to the system's error page. However, when a match is found and I try to redirect, I keep getting the error "Unable to evaluate expression."
[Code]....
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Apr 5, 2008
Whenever I decide to make a utility in VB.NET, I always end up writing a class like this one. I'm using it in an Explorer-like listview, and while I know it works, I have no idea (or experience) with coding for minimal overhead, speed, and precision. So I would like to know what I can do to optimize it.
''' <summary>
''' File sizes (I.E. to get strings like "1.45 MB" and "5.31 GB" or "60.4
[code].....
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Feb 10, 2009
I have this line in some
Integer.TryParse(ThisRow.Item("DatumID").ToString, n)
ThisRow is a datarow. The "DatumID" in this case happens to be an empty string, but is not Null. When I break on this line, and try to evaluate it by highlighting it and pressing Shift+F9, I get the message "Unable to evaluate expression". Interestingly, it is actually evaluating correctly (since the item holds an empty string, TryParse returns False).
I have tested this in every way I could think of (mostly I thought I had left out a parenthesis in my expression, but that wasn't true). So why won't that expression evaluate when tested, even though it is actually working correctly?
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Jun 5, 2010
"In what circumstances will the following boolean expression evaluate to true?
strAlphabet.indexOf(StrCharacter) >= 0 And _
strAlphabet.indexOf(StrCharacter) < 0
Once you have answered that question, you should be able to complete this description: the expression indicates whether strCharacter is ..... but is not...."
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Oct 24, 2011
I have one test class which having few variables declared in the header of the class where it will be accessed for all the subroutines and functions in the class. Here's the sample of my declaration:
Private m_dblMaxPwrLimit As Double
Private m_dblMaxPower As Double
Private m_intHalfPwrIndex As Short
Private m_intMaxPwrIndex As Short
After that, I have one Private Function which need to access some of the variables declare in above. Part of my function is show as below:
Private Function GetPmaxIndex(ByVal Serial As Short) As Boolean
Dim i As Short
Dim Total As Short
[code]....
The problem is when I step into the line of m_dblMaxPower and m_intMaxPwrIndex, I can't see the value of these variables which is suppose I can see it as in VB6. Additionally, when I put Add Watch for these variables, it showed 'unable to evaluate expression'. I guess it is not being used and I think something is wrong with my declaration but I do not how should I declare it corretly because as for VB6, we can declare all the variables in the header of the class and we can use it for all the subroutine/function within the class.
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May 24, 2012
I have been getting sometimes with SOME libraries (be it included in the framework or not).[code]I'd expect the func.Call() to return an exception if something is up, or do anything to error out, but here it just murders my method which returns instantly! The same stuff here is also in a loop, which doesn't get any more iterations, it just stops executing this function and continues running the program.
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May 19, 2010
I am making a simple calculator that will evaluate functions I have a entry box and the user types in simple equations i.e. 1+4*3/5=? how would i make this evaluate the string?
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May 17, 2011
I have a Winforms project that is loosely based on MVVM. Security is implemented by the domain layer by using the PrincipalPermissionAttribute, [cod]e...
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May 22, 2012
Dim MyString as String = "Various very long strings, 1000 of lines. Here \n \n \n to <TR> here."
Dim MyMatch As MatchCollection
MyMatch = Regex.Matches(MyString, "Here((.|\n|\r)*?)<\/TR>", RegexOptions.Multiline)
Dim MyArray(MyMatch.Count - 1)
This code stalls. I was trying to find out why my app stalls, and never breaks, or reports an error. I found out, that it stalls in the last line of code, where Count in MyMatch sometimes is not numeric. It has various error values, such as: "Unable to evaluate expression", "Evaluation of expression or statement timed out", and similar.I was trying to find solution, searching the internet, but no success. On MSDN site, there are 2 simple advice: a.) Verify that the entered code is correct. b.) Simplify your expression so that it takes less time to execute.My code is correct. It works on some strings, and stalls on other. I couldn't simplify it more, because strings to test with matches are different every time. They differ in length, and also in content
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Mar 21, 2010
While looking in the dataset designer for a database table I am doing in visual basic 2008 I found a line for expressions under the property menu for a specific column. I need to know the code that I would put in this expression line so that this column adds up the numbers I input into three other columns and displays that number in the column. I need it to automatically calculate this for each row in the database table.
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Apr 7, 2009
I need help with ASP.NET in the VB.NET language.Currently I have a server that contains a script called Query.aspx. I want this script to evaluate another script, as an example "Test.aspx", and print the evaluated response out as Query.aspx's response.
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May 10, 2012
i've this code to insert records into datagridview
PrivateSubForm1_KeyUp(ByValsender
AsObject,
ByVale
AsSystem.Windows.Forms.KeyEventArgs)
[code]....
the trouble is that i need to evaluate the duplicate item from serialtextbox when the scanner put in the code?
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May 4, 2012
I don't know what I have done wrong in this code using vb 2010 express, well here it is anyway
MsgBox(10)
MsgBoxStyle.Critical()
MsgBoxStyle.OkOnly("ERROR")
I get three errors of expression is not a method
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Mar 4, 2010
Ok so I have alot of plans for programs coming up and I want them all to fade in and out so instead of copy and pasting from project to project etc I learnt about dll's
So when I added in the references etc and I typed in what I declared the Fadein function as which was "FadeIn" I got an error saying it needed to be declared
So I declared it as a string
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim FadeIn As String
FadeIn(Me)
End Sub
Then I get a different error saying Expression is not a method.
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Aug 7, 2009
im migrating from vb6 to vb.net and have only very basic knowledge of .net. now i upgraded one of my projects, in which i had function cleartexts() which would clear all the text boxes of the forms. now to upgrade it to .net i converted it to sub (as it didnt return anything), so it looked like,
public sub cleartexts()
for i = 1 to 24
text(i).text=""
next
end sub
but .net 2005 gives the error, "expression is not a method", how do i call it then?? or what modifications do i need to make?
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Jan 9, 2012
I am getting an error when trying to call a form from within a method:
Expression is not a method
My code structure looks like this:
Public Class frmMain
Class Server
Private Shared Sub StringMessageReceived()
[Code]....
How can I call the windows form within the class?
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Jan 12, 2010
This is kind of a silly question, but is it possible to get the name of the method that is currently being executed from within that method?
Public Sub SomeMethod()
Dim methodName as String = System.Reflection.[function to get the current method name here?]
End Sub
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Feb 23, 2010
How would you convert this to VB (using .NET 4.0 / VS2010) ?
bw.DoWork += (o, args) =>
{
Code Here
};
I thought maybe like this:
AddHandler bw.DoWork,
Function(o, args)[code]....
But it says Function does not return a value on all code paths.
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Jan 27, 2012
I have an inline lambda expression that I would like to use throughout my application. I just can't seem to find a reference on how to do this with more parameters than the element being tested. Here is a quick example of what I currently have.
Private Sub Test()
Dim List As New List(Of String) From {"Joe", "Ken", "Bob", "John"}
Dim Search As String = "*Jo*"
[Code].....
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Jan 11, 2012
I want to create a (vb.net) method and call it from an expression like this:
=Code.WhereDoIWriteThiscode(Fields!SomeValue.Value)
Where do I write this WhereDoIWriteThiscode method ?The documentation says it is an embedded method.
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Aug 4, 2011
i have these 3 sets of code that are giving me INT() errors. Error: Expression is not an array or a method, and cannot have an argument list.
Code1:
Private Sub Form6_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim Browser As New WebBrowser
[code]....
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Apr 22, 2009
Imports System.Reflection
Public Class Test
[CODE]......................
'This line indicates a compile error: 'Expression does not procedure a value':
[CODE]..................
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Jul 24, 2009
I need to get the name of curent class which calls the method (which parent is another class) from inside of that method. Is it possible in vb.net?
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May 23, 2012
The following LINQ query resp. call of the extension method Select in Visual Basic 2010 is working fine:
Dim qAvSalary = qJobData.Select(Function(e) e.AvSalary) But doing so I am not able to specify the name of property I want the query (e.g. AvSalary) using a string variable. This should be possible if I use a LINQ expression tree. Searching and trying a long time on how to translate the query to a corresponding expression tree was not successful. My final approach is:
[Code]...
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Jul 6, 2010
I have a collection which I wish to retrieve an array from in .NET 2.0. In other words, I want to convert a collection into an array. So far I have the following:
Public Class Set(Of T)
Implements IEnumerable(Of T)
Implements ICollection(Of T[code]....
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Jun 22, 2011
The following snip of simple code runs pretty slow on my computer, and I suspect that it is due to excessive memory usage, since the program reports using >1GB mem according to TaskManager. Am I using the DataGridView in a wrong way? Instructions: Make a windowsforms application and put 2x button and 1xDataGridView on it. Push button1 and then button2 - sort the data in the DataGridView by a different col and push button2 again. It'll go above 1GB mem usage! Basically I need to display a lot of data to a user and allow the user to sort the data and generate something from them.
Public Class Form1
Public dt As DataTable
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
dt = New DataTable
[code]....
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May 1, 2012
This code is for 2008, 2010 and later versions of VB.Net as it uses an extension method.Please note: If you are using an earlier version ( or you do not like extension methods ) please see the next post.Here is the code I posted on Monday April 30th, 2012.>>Now you can specify the startRadius to be
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Jun 26, 2009
The 'reader' within the if statement is showing "Expression is not a method", what am I doing wrong?
[Code]...
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