Build Error - Property Keycode Is Non Nullable

Jul 4, 2005

I tried to build my project but it has 1 build error
:Property 'Keycode' is non-nullable.
I double click it but it points nowhere. I'm really desperate. My project consists of Crystal Report. It had just been upgraded from version 8.5 to version 11. Is it possible that this is the source of error?

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Property Keycode Is Non-nullable?

Apr 7, 2009

I am creating a setup project for my VB application. Everything seems to look fine. However when I tell it to build the solution I get the following error:Property 'keycode' is non-nullable. I have never seen this before in other setup projects and I can't find any help from MS.

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Use Nullable(of T) For Property Using List<of T>?

Jan 17, 2012

In the below sample code, I have tried to use Nullable(of T) for DateTime and I want to use it same of the Dimensions property which is List(of Dimension).

CODE:

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Nullable(Of Double) Property Turns Nothing Into 0.0?

Mar 5, 2009

I was under the impression that any time I set a Nullable(Of Something) to Nothing, it will take the value of Nothing.In a class, I have;

Private _something As Nullable(Of Double)
Public Property Something() As Nullable(Of Double)
Get
Return _something
End Get

[Code]...

In my page, using this class I set Something = Nothing, but as I step into the Set method, value = 0.0.Am I doing something wrong here? Or do I just not understand Nullable types yet?

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VS 2008 Nullable Property Question?

Feb 16, 2011

I have Nullable properties in my class:Public Property FileStatusID() As Integer?

Get
Return m_FileStatusID
End Get

[code].....

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Invoke HasValue On A Nullable Property Of An Object Via Reflection?

Sep 15, 2010

This function loops all properties of an object to create the updatequery to save te object to the DB.

We had to make some changes to it because of the introduction of nullable properties. If the property is nullable we would like to check the 'HasValue' property. This does works when it has a value. When the property has no value we get an 'Non-static method requires a target'-error at the CBool-line

An other way to check the 'HasValue'-prop of a property using reflection?

Private Function GetUpdateQuery(ByVal obj As Object, ByRef params As List(Of SqlParameter), Optional ByVal excl As String() = Nothing) As String
Dim sql As String = String.Empty

[Code].....

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Nullable Property - Set Code That Execute In The Case Of The Value Being Null

Sep 17, 2010

[Code] Now the problem is that after i put this user-control in a form, I have to set a value for the Handled file. Otherwise it gives me a value cannot be null exception. Is there a way that i can set code that would execute in the case of the value being null? [Code]

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Set Nullable Property In Program Like "public Decimal?

Dec 17, 2011

How to set Nullable Property in vb.net like "public decimal? unitprice {get; set;}"

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Why Won't A Nullable Public Property In A Class Accept 0 (zero) As Assignment

Apr 17, 2009

I have a nullable public property on a class using Vb.net 3.5:

Public Property TicketCharge() As Nullable(Of Decimal)
Get
If _TicketCharge = Nothing Then

[code]....

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Keyboard Up / Down Event - Error: KeyCode Is An Integer Not Byte

Jan 30, 2010

Private Declare Sub Keyboard_Event Lib "user32" (ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Long, ByVal dwExtraInfo As Long) [Code] I know the KeyCode when i call this function. Example 13 is the keycode for "Enter". But it says that theres an error on syntax cause KeyCode is an integer not Byte. What kind of variable does it need there? I mean does it need the keycode (which is a number) or a character e.g. "a"? [Code]

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.net - CLR FormatException Thrown When Databinding An Int32 Field To A Nullable Decimal Property?

May 28, 2012

I have written a .Net 4.0 Winforms Numeric Editor control (which inherits from TextBox), and I have added a Value property that is a nullable decimal type, as follows:

Public Class NumericEditor
Inherits TextBox
Private _value As Decimal? = Nothing

[code]....

how to get around this exception, particularly when I'm databinding a number field to a number property, and there should be no string conversion happening. (To further complicate things, I'm using a similar technique for another control where I databind a DateTime field to a nullable DateTime property, and that control works just fine.)

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Control Property Being Modified On Build Or Run

Apr 3, 2012

I have an Inherited Control with a Property that can be set in the designer. There's some code in the Set procedure to make sure it's set appropriately. However when I build or run the project that property is changed, I am assuming it's the sanity check code in the Set procedure that's causing it to be changed along with some VS beahviour. Here's the code:

[Code]...

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Error In Assigning Object Of Nullable Type?

Jul 9, 2010

I have a structure that contains another structure. The inner structure is nullable. Now wht I do is something like the following. I create a new instance of the inner structure, set the member variables and assign the whole structure to the inner structure of the parent. But it is giving an error. The assignment is not successful. If I try to peek into the structure in the watch window, it says "property evaluation failed" for the HasValue and Value properties.

Dim testData As List(Of TestData) = Nothing
Dim testData_List1 As New TestData
With testData_List1.commonTestParam

[Code].....

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Error Querying When Nullable Types In Where Clause

Mar 1, 2012

I have the following NHibernate Linq query:
From eachLine In myNhSession(Of SamplePoco)()
Where eachLine.SampleIntField = 1234
The property SamplePoco.SampleIntField is type Nullable(Of Int32)

When I run the query, I get the following exception:
System.InvalidCastException: Unable to cast object of type 'NHibernate.Hql.Ast.HqlCoalesce' to type 'NHibernate.Hql.Ast.HqlBooleanExpression'
If I change the property type to Int32, it works. It seems that Nullable types are automatically converted into a coalesce expression by the Linq compiler.

Debugging the NHibernate, I just found out that this Where clause was converted into: {where ((eachLine.SampleIntField == 1234) ?? False)}. As I can understand, the whole condition comparison was translated to be coalesced instead of just the Nullable property.
If I put this way eachLine.SampleIntField.Equals(1234) it doesn't work as well ('Equals not implemented' exception)

If I change the query to the following code, it works:
From eachLine In myNhSession(Of SamplePoco)()
Where {1234}.Contains(eachLine.SampleIntField)

Another code that works as well (coalescing the field properly as I was expecting by the first query):
From eachLine In myNhSession(Of SamplePoco)()
Where If(eachLine.SampleIntField,0) = 1234

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Extension On Nullable(Of T) Object, Gives Type Error?

Oct 29, 2010

The code I want to work:

<Extension()>
Public Function NValue(Of T)(ByVal value As Nullable(Of T), ByVal DefaultValue As T) As T
Return If(value.HasValue, value.Value, DefaultValue)

[code].....

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C# - Nullable(of Guid) With Generic Delegate Causes Weird (hidden) Error?

Jun 6, 2011

Scroll to the bottom, EDIT 19 onwards. See @Chris's comments also for good examples

[code]...

It's all gone quiet since Edit 19ish and @Chris reinforcing the issue with a good example (thank you Chris). I'll make the question a little easier (and attempt to tidy up all of the above), can anyone prove this is not an MS bug or similar? It seems to be something under the hood is not correctly wired up for VB.Net with regards to Nullable Structures and Events? However, all other cases using the Nullable Structures does appear to work?

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VS 2008 Webservice Compilation Error Re:System.Nullable(Of Decimal)

Jun 1, 2009

Quote:Value of type System.Nullable(Of Decimal) cannot be converted to System I have the code below which seems to work fine on my development server but causes a compilation error when I put it on my live webserver (uncommented).The error message I get from the event viewer in IIS is as above.

' <WebMethod(Description:="Insert into Referral Payments Table.")> _
'Public Function InsertReferralPayment(ByVal ReffererCustID As Integer, ByVal InstalledCustID As Integer, ByVal AmountReferrer As Nullable(Of Decimal), ByVal AmountInstalled As Nullable(Of Decimal), ByVal ReferrerChequeSentDate As Nullable(Of Date), ByVal InstalledChequeSentDate As Nullable(Of Date), ByVal ReferrerChequeNo As Integer, ByVal InstalledChequeNo As Integer, ByVal InputBy As String) As Integer

[code]....

From what I can tell IIS is configured the same and both referenced DataTables seem identical.

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Jpeg Images And Changing Build Action Property To Embeded?

Mar 13, 2010

i made a class library with by adding two .jpeg images and changing build action property to embeded resources and i saved i want to use this two images from this .dll into my application .

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ERROR: Unrecoverable Build Error When Building Setup Project In VS.Net 2005

Nov 8, 2005

I got "Unrecoverable build error" when building setup project.I try the solution in [URL].. but did not work out.

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Error - In Order To Evaluate An Indexed Property, The Property Must Be Qualified And The Arguments Must Be Explicitly Supplied By The User

Jun 20, 2012

I'm having a few problems converting some code into VB.NET from C#. Most of the translating is done, but I am getting errors when I try to run my code, and I can't figure out what is causing them. Here is the Sub I translated.

Public Sub CreateWidget()
Dim blue As LCDColor
blue.Red = 0
blue.Green = 0

[code]....

The error I receive on this line ("vision.Widgets.CreateWidget(wg1)") reads "In order to evaluate an indexed property, the property must be qualified and the arguments must be explicitly supplied by the user."

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Runtime Error '-2147418113 (8000ffff)':Could Not Get The CurLine Property. Unexpected Call To Method Or Property Access

Sep 24, 2009

start with I was given a program by a friend that was created in Excel 2003 with the help of Visual Basic Editor. He said he used Visual Basic 2003, which he is not 100% sure about. Anyways he used CurLine in the program and when I try to open it in Excel 2007 and then open the Visual Basic Editor and run the program I get the following error:Run-time error '-2147418113 (8000ffff)':Could not get the CurLine property. Unexpected call to method or property access.

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VS 2005 Error: Property Access Must Assign To The Property Or Use Its Value?

Aug 13, 2011

got an ErrorProperty access must assign to the property or use its value.Here i attach the code which have an error.In this program i tried to add data into form . I also create button , textbox. i am using visual studio 2005 and sql 2005. i also have attach the imagece

Private Sub btnregister_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnregister.Click
admin1.LoginDataSet.staff(Me.NAMETextBox.Text, Me.TELEPHONEMaskedTextBox.Text,

[code].....

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Build Error But No Errors In The Error List?

Sep 18, 2009

Is there a way to find what the error is?

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Error 83 Property Access Must Assign To The Property Or Use Its Value

Dec 22, 2010

Well in my vb project it has started giving me a really weird error underlining all my msgbox codes for some reason

this is the error Error 83 Property access must assign to the property or use its value. C:UsersAidanDocumentsVisual Studio 2008ProjectsXeX 360 ModzZ B0XXeX 360 ModzZ B0XForm1.vb 56 17 XeX 360 ModzZ B0X

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Error: Property Access Must Assign To The Property Or Use Its Value

Apr 20, 2010

I have a property in a class as below:

Public MustInherit Class AddOn
Public Delegate Sub UpdateProgress(ByVal fractionComplete As Double)
Private privateProgressUpdate As UpdateProgress
Public Property ProgressUpdate() As UpdateProgress

[code]....

I am getting the error that "Property access must assign to the property or use its value" in the above code.

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Error - Soap Serializer Does Not Support Serializing Generic Types : System.Nullable`1[System.DateTime]

Oct 2, 2009

Im working on my first n-tier application. I am trying to serialize a structure and Im getting an error"Soap Serializer does not support serializing Generic Types : System.Nullable`1[System.DateTime]."Here is the structure that is being serialized
Namespace Structures

<Serializable()> _
Public Structure structAllergy
Public AllergyID As String
Public ProfileID As String

[code]....

The bold line is the line that is throwing the error.

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Build Error Do Not Understand It?

Feb 18, 2011

I am getting a build error. If I try to build again after getting this error, it will build just fine.

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Folder Error When Build Msi

Jul 25, 2011

When I build the msi in visual studio 2008, it passed in building the exe files but error in building the msi file[code]...

I try to google "General failure building folders" and not related result found.

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Asp.net - Expression Expected - Getting A Build Error

Feb 22, 2010

Im getting a build error with the following code...

Private Property GridViewSortDirection() As String

Get
Return If(TryCast(ViewState("SortDirection"), String), "ASC")
End Get

[CODE]...

It is happening on the following line...Return If(TryCast(ViewState("SortDirection"), String), "ASC")

Error returns...Error 11 C:inetpubwwwrootTPSupportmainUserControlsgrid.ascx.vb(192): error BC30201: Expression expected.

Its a convert from c#

private string GridViewSortDirection
{
get { return ViewState["SortDirection"] as string ?? "ASC"; }
set { ViewState["SortDirection"] = value; }
}

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Build Error Library Not Registered

Jan 7, 2011

I am trying to publish my application. While trying to publish it, I received a publish failed message. So, I tried to build to get more description on whats going on and this is the error I received: [code] Is there any way I can fix this? If not, what are some compiler's I could use to get this thing published?

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