Using Enumeration Of Class From Form?
Aug 10, 2011
I have a form event that calls a public function in a class. I am trying to use an enumeration that is in the class from my form, but I'm getting a green squiggly line under clRS.enmProcedure.SetReady.
The error says this:
"Access of shared member, constant member, enum member or nested type through an instance; qualifying expression will not be evaluated."
Private Sub dgvResults_CellContentClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles dgvResults.CellContentClick
If clRS.pubfnc_UpdateResults_M(dtResultID, Me.dgvResults, clRS.enmProcedure.SetReady) = "Failed" Then
Exit Sub
End If
End Sub
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Jan 4, 2010
I have a base class which needs to define an enumeration:
BaseClass
- SomeEnum
I then need to create two derived classes from the base class and extend the values in the enumeration:
ChildClass1 : BaseClass
- SomeEnum
- SomeEnumValue1
[code]....
In C# or VB.NET can someone provide the syntax to do this?
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May 28, 2010
I have just received an interesting feedback from a VB.NET customer using our product - for some reason intellisense hidden a certain enumeration value.After a small testing I have found that this is likely a bug in IntelliSense: [URL]..To be honest, I did not expect this problem with such a basic stuff like this. Have you seen this in the past? For me, it doesn't work in all VS versions...
Anyway, feel free to track this issue if you are coding in VB.NET.
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Apr 15, 2010
I have put this code in the global form Inherits System.Windows.Forms.Form. And then in the form that will inherit this from the global Inherits MenuStrip. "MenuStrip" is what the global form is called. But keep getting this error: Error1Base class 'MenuStrip' specified for class 'Lesson2' cannot be different from the base class 'System.Windows.Forms.Form' of one of its other partial types.
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Oct 1, 2008
I've been creating short test apps repeatedly to try to understand some of the concepts in VB.NET.For the most part it has been illuminating.I read Bucky's .NET knowlegebase tutorial on passing objects as parameters to newly created forms. He shows how to create a new class that inherits from the base form class and define a New() method with parameters Extending the concept I thought about doing the same thing with a form that was created at design-time (In this case Form2).
[Code]...
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Nov 22, 2011
I'm trying to get the ATM Class to Instantiate on the Form class.
[code]...
ISSUE = " 'ThisATM' is used before it has been assigned a value. A Null reference exception could result at runtime"
The Other problem i am having is with a class in the program called CardReader. What am i supposed to type to let the code below be able to "read" the read function on the Form1?
[code]...
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Dec 17, 2009
Is there a way to check to see if the enumeration is already finished?
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Oct 3, 2009
I have the following enumeration:
Code: Enum E1{ LOW = 'L', MEDIUM = 'M', HIGH = 'H' }
I have loaded those values to a combo box, but how do i display the value of "MEDIUM" (I.E. M), when i select "MEDIUM" from the combo box.
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Feb 27, 2010
Can I use enumeration in a loop? something like this:
Enum Days As Integer
Monday = 1
Tuesday = 2
Wednesday = 3
End Enum
[Code]...
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Dec 4, 2009
I have a Windows Forms UI, a Class Library, and a WebService. I need to be able to pass an Enumerated type through each of these layers (SystemType). For instance, the UI passes the type to the class library, which then passes the type to the Web Service.My question is, where do I define this enumeration type so they all know about it.
Options so far:
- Each project contains the exact same enumeration.
- Put the enumeration in its own project and reference this assembly from each of the other projects.
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Jun 21, 2012
I am trying to figure out if the DayOfWeek Enumeration list can be sorted by using the integer value (ie Sunday = 0). Ultimately I want to take the DayOfWeek Enumeration list and population a dropdownlist with the days of the week from Sunday - Monday and I do not want to hard code the items in the HTML markup. Is this possible?
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May 18, 2012
I have some code that i cant work out why its happening and how to fix it. What im attempting to do is loop through the controls in a gridview and replace it with another control along with the text
Dim i As Integer
Dim row As GridViewRow
Dim rowCell As TableCellCollection = row.Cells
[Code].....
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Nov 6, 2011
I have a case where my enumeration is like this:
Public Const PREVIEWCREATE As Integer = -3
Public Const SETUP As Integer = -2
Public Const PREVIEW As Integer = -1
I then have a form post where i recover a string like:
Dim mode_custom_mode = request.Form("custom_mode")
I can do
Select Case UCase(mode_custom_mode)
Case "PREVIEWCREATE"
[Code].....
is there a more direct way in VB to do something like:
t.StartupModeId = StartupMode.(mode_custom_mode) ?????
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Apr 16, 2010
Is it guaranteed that the numeric values for an Enum with only uninitialized values start at zero and increment by one in the order defined?
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Aug 15, 2011
I've been getting the following error from time to time and have been unable to determine the cause of it:"The given key was not present in the dictionary."The line that this is occurring on is:If CType(ViewState("FieldType"), MYClass.FieldType) = MYClass.FieldType.ShowOnDirectory ThenI have no idea as to why it is throwing this exception on this line. I thought that perhaps an invalid value was being placed in the ViewState so I tried while debugging setting the value to Nothing and setting it to a value that wasn't in the enumeration and it still works. I was originally storing the enumeration in ViewState and then went to storing just the Integer equivalent in there
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Jan 19, 2011
I would like to use a keyword (reserved word) as a constant name in an enumeration.The reason I care about the name is I set a ListBox.DataSource to the .GetValues of the Enum Type.This way the list of constant names show up in the list box and the ListBox.SelectedValue can be tested to determine which constant value has been selected.What I would like to be able to do is as follows:
Enum
Style
As
Byte
[code]....
This was an attempt to override the Name property from S to Single However I get a pre-compile error stating: "Too many arguments to 'Public Sub New()'."
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Jun 16, 2009
Enum age
Over18
Under18
End enum
[code]....
'age' is a type and cannot be used as an expression.Is there any way of using enums in "select case"?
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Nov 30, 2009
when does the computer calculates Enum?in other words wiill this 2 be Exactly the same?
dim a = 1
dim a = myenum.value_equates_to_1
i've got a feeling its faster when we do not use enum, just wanted to make sure
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Apr 9, 2010
I designed a class contains a form that have buttons. When i click any button this function runs
Public Sub BtnClick(ByVal sender As Object, ByVal e As EventArgs)
result = CType(sender, Button).Text
[CODE]...
In another project I imported this class. I called the method that shows the form in my class. I need to store the 'result' variable in another variable in the new project. How can It be done.
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Aug 23, 2010
add all of the items of an enumeration into a an array of strings....
1
Enum Test
apple = 0
plum = 1
[code]....
If possible I'd like to dynamically at the start of my code be able to add apple, plum, carrot and scotch to the contents of an array (really a combobox) and if I have to had another item to the Enum that it automatically be added to the array.I seem to keep having to add vendor names (replacing produce/liquor) and I need the items to show up in a large project in many places and it's a pain to have to add the item to each every time.
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Sep 3, 2010
I'm writing a class library in .NET that wraps a COM dll and exposes specific functionality to be consumed by other .NET code. The COM library has several enumerations defined and I've used some of the enum types as parameters like so:
//C#
public void TransactionTypeSetByEnum(COMComponent.TransactionType transType)
{
this.TransactionType = transType
[Code]....
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Aug 6, 2010
The possible values of PixelOffsetMode are:
Invalid
Default
HighSpeed
HighQuality
None
Half
I'm guessing that HighQuality = Half, HighSpeed = None and Default = HighSpeed. If this is true then, like the SmoothingMode, I can offer just two simple options.Does anyone know if this is correct and, if so, where on earth did you find the information?
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Apr 15, 2012
I created a Web Reference (also tried Service Reference) to a WSDL that had the following node inside an xsd:
<xs:element name="filter">
<xs:complexType>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element minOccurs="0" maxOccurs="unbounded" ref="condition" />
<xs:element minOccurs="0" maxOccurs="unbounded" ref="filter" />
[Code] .....
This wouldn't build in a VB project because VB.NET is case insensitive. I tried deleting one set of and/or, but when the XML is created, it simply ignores the selected value. I also tried appending an X at the end of one the sets which also failed. Is there a way to make this work? I also tried updating the XSD so it just had two values without success. The interesting thing to note is that default is set to "and" and while debugging it will set it to and, it doesn't actually produce the node attribute of it just generates.
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Dec 23, 2011
I get that error any time my form closes(Me.Close), even if I don't do anything to the form at all exept load another form like this: Form2.Show Me.Close().
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Mar 15, 2011
I have a .NET library that needed a COM wrapper around it so it could be called from VB6ish programs, in this case specifically Microsoft Access XP I have a type that's declared in one of the classes that went into the .NET library. I thought since its public, it would be seen, but it didn't show up in Access. And yes, we made the TLB file and registered the COM interface. I had to move the type declaration into the COM module, which I really didnt want to do. Is there a way to export a type/enum through COM without actually declaring it in the COM interface Scott Berger McCormick Systems
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Oct 17, 2009
I'm having trouble populating an object from an XML file. I've copied an example I've found almost exactly, with variable names changed, but I keep getting the "Enumeration yielded no results" exception.
Here is my code:
[code]...
Essentially, the XML query is supposed to return the title and the description for every Property which has an element called Language Code, which is equal to "en-us". I have a feeling that my problem lies in my XML code, but I've been stuck here for a long time now.
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Oct 8, 2010
I have the following Enumeration in my vb.net code:
Public Enum ContactTypes As Integer
ctStudent
ctPartner
ctDocent
ctProjectleider
[Code]...
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Feb 18, 2010
Hi
I've got a pretty general question about the best practice in passing an object reference to a Form in VB.NET. My form is a dialog and I've created an overload ShowDialog method, where I pass an Object into it ByRef.
The trouble is, I want to be able to refer to that Object throughout my dialog Class and not just in the ShowDialog method. For instance, some of my Events for controls on the form, need to reference that object.
I know I could create a local Private variable in the Class and assign it to the passed value, and then use that value. However I'm thinking this isn't very efficient because it would (I believe) create a new copy of the Object (which is a complex, large class in itself).
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Aug 4, 2011
We have some third party code that is causing some misery at the moment due to throwing the above error: it is slightly odd because it is an intermittent error. Here is the method that is causing the issue:
Private Shared Sub IntLocateDictionaries(ByVal haystack As ExpDictionary,
ByVal needlearray() As Object, _
ByVal resultarray() As Object, ByVal removemarks As Boolean)
Dim i As Integer
Dim item As Object
[Code] .....
I understand that this error is usually caused by trying to modify a collection whilst enumerating around it, hence why I've added logging on the only line that looks like might alter the collection... Since adding the logging we have still experienced the issue but NO LOGGING appears: this isn't surprising since if you look at the parameters on the calling line (the only place this Sub is called from) - removemarks is passed as False - this will be passed all the way down through the recursive calls and so that line which calls .Remove never gets executed....the fact we don't see logging proves this....
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Feb 17, 2012
I am working on a project where I have a personnel class. The records stored in the class are populated a few records per second. At the time I am inserting the records, I have to check the same class to ensure the same record is not added twice. Since I am looping through the class using "For Each", I get a message "Collection was modified; enumeration operation may not execute".
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