Enum Inside Structure - Adding Properties?
May 19, 2009
I have an enum that I want to give some methods. I thought about changing the enum to a structure so I could add properties, but then the enum is a value inside the structure (not the structure itself), so this would affect comparisons and such. (For example, instead of writing
EnumVariable=EnumConstant,
Now it is
StructureVariable.EnumValue=EnumConstant).
At least, this is my understanding of it. It seems awkward to have to do this for such a simple scenario, so is it possible give enums properties, yet still have them treated as before? I've thought maybe I need to create a new valuetype from scratch, but I've never done that before.
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Aug 23, 2011
I've tried the code below but it always returns nothing, It should enter
Protected Function GetTotalDebitAmount(ByRef roEntryDetailRecordBaseList As List(Of PPDEntryDetailRecord)) As String
Dim iTotal As Integer = 0
[Code]....
I need some one who evaluate the part below:
If CBool(Array.IndexOf([Enum].GetValues(GetType(TransactionCodes.Debits)), CInt(oEntryDetailRecord.TransactionCode)) > 0) Then
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Jan 5, 2012
Module Module1
Public Structure structure1
Public TRANS() As structure2
End Structure
Public Structure structure2
Public X() As Integer
End Structure
End Module
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Jan 5, 2010
I'm new to VB 2008 after having spent a long time with VB6, so I apologize if this is a stupid question. But I'd really like to have this straightened out.
Let's say I have a pretty large structure that has lots of properties.
Code:
Now say that I want an internal database with about 10 instances of this structure total, describing, say, 10 different products that a store sells. When these values are loaded from a database, they remain totally static. (However, they can be different each time a program loads)
Now say that I have a class. Each instance of this class is a type of that BaseProduct structure. Meaning, each instance of the class pertains to one of the 10 types of products that the store sells. However, this class has additional properties that pertain specifically to each instance, which are not static.
Code:
Now, the problem here is... If I have 200 different transactions, each one contains an instance of BaseProduct. BaseProduct is HUGE, and is largely redundant (only 10 types possible), so I think it's a little silly to include a whole copy of it with EVERY transaction. However, the Transaction class really needs information regarding the base product it pertains to. Is there a way to, instead of declaring a New BaseProduct in the Transaction class, to simply make one of the properties of the Transaction class a pointer to a BaseProduct variable?
In VB6, I would accomplish this by making a BaseProduct(10) array, and then giving each Transaction an ID number referring to an entry in that array. But in VB 2008, using class structure, this is impossible. I can't define the BaseProduct(10) array outside of a class in a namespace, and if I define it in the actual application's form, then the class loses modularity since it relies on the application that's using it.
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Feb 4, 2009
I am coding in vb.net. I want to achieve something like this (sample) -
Structure Transport
Dim land as L
Dim Air as A
[CODE]...
But though i can create enum but how can I embedd it in structure. It is not allowing me to do that.
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Feb 23, 2011
What I am wondering is, is it possible to create an enum and attach it to the DateTime structure? Extension Methods come instantly to mind, but I don't know of a way to pull this off using them.
Dim july As DateTime.Months = DateTime.Months.July
Public Enum Months
January = 1
[code]....
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Oct 26, 2011
So apparently Microsoft does not have a Months Enum on their Date structure.What I am wondering is, is it possible to create an enum and attach it to the DateTime structure? Extension Methods come instantly to mind, but I don't know of a way to pull this off using them.[code]...
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Nov 10, 2011
I think it's substituable for just Dim, Public or others. What is merit by using structure, property ??
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Dec 30, 2009
I have a URL lets say . some time i need to send HTTP and some time i need to send it to HTTPS for that i created a enum:
Private _protocol As Protocol
Enum Protocol
HTTP
HTTPS
[CODE]...
Now when i get value back from protocoltype it returns me integer value as enum do so tell me how to get string from enum or other substitute.
Dim targetUri As String = setting.protocolType & "://www.mysite.com"
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Jul 28, 2011
In a global module, I define a new type that can take 4 values:
enum tAction as integer
None
Update
Insert
Delete
end enum
A use this type in many places in my code to check the value stored in a variable (if MyAction = tAction.Delete then ...)
In a separate file, I define a class. One of the properties should return a value of this type:
public class XXX
private _Action as tAction
public property ClassAction() as tAction
[Code].....
This way I could check a class property in the same manner (if MyClass.ClassAction = tAction.Insert then ...)
However I get a syntax error in the property definition: 'ClassAction' cannot expose type 'Globals.tAction' outside the project through class 'XXX'
My entire program consists in a few modules, in a single project. How can I use my tAction definition in my classes?
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May 17, 2012
I'm trying to create a structure and inside it put an array of "Genres". This is my structure declaration:
Structure BookData
Dim strGenres() As String
[code]....
But I keep getting an error with the .strGenres(5). VB is telling me "End of statement expected"
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Nov 6, 2008
I have my own class of graphic objects, and now I'd like to allow a user to right-click on one of those within the application and see a properties window. Is there a pre-built dialog or control for displaying properties at runtime? I'd like to have something just like the IDE properties window button for my application.
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Feb 23, 2009
I am having some trouble using Refelction to list the properties of a user defined structure. I need to get a list of the properties and their values.[code]
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Jun 6, 2011
What is the side effects of defining a structure inside a class (name it X), and create a property inside that class of the type X?
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Mar 25, 2011
I'm trying to declare an enumeration and one of the names I'd like to use for an item is not usable apparently. Where I am declaring 'STEP = 3', I get this error message in visual studio: "Statement cannot appear within an Enum body. End of statement expected." Is it possible to use STEP as an item name somehow? [Code]
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Feb 13, 2012
I am trying to be able to add to an established Array that is read in from a CSV file. I'm using structures and I get the concept, but I just can't seem to get it to store. I am using Visual Basic 2010. Sorry for posting in here, but I did not see a category for it.
[Code]...
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Jan 2, 2012
RE - FilesystemRights Enum
This Code:
Dim FSRS As Type = GetType(FileSystemRights)
For Each fsr As String In [Enum].GetNames(FSRS)
TextBox1.AppendText(fsr.ToString & vbCrLf)
Next
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Oct 19, 2011
I'm trying to validate a form to be filled out by the users, and when the required section isn't filled, I increment an
ErrorCount += 1
variable to show that error(s) have occurred inside the program, I then also set an
ErrorArray()
to whatever the corresponding field number is, now I have 0-12 (13 fields). What I have also done is titled the labels that are associated with all of these fields to correspond with the ErrorArray() value that might be set, such as.
PatLabel0
PatLabel1 etc.
What I am trying to do is loop through the array contents, depending on which ErrorArray() values have been set, to go and set the corresponding fontcolor property of that label to red, to show that these now need to be filled out. This is what I have, but Visual Studio doesn't allow me to use the iteration through the loop as a reference to changing properties. Can anyone point me in the right direction to trying to figure this out, or at least tell me what else I could do. Just seems doing 20 if....then....else.... statements with 2 - 3 lines in each of them is redundant when 1 function line could do the same job. This is what I have.
for i = 0 to UBound(ErrorArray(12))
if(ErrorArray(i) = "*")then
PatLabel(i).forecolor = color.red
[code]....
that is basically all im looking for initially, but I can't do it.
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Nov 17, 2011
I've searched as best as I can, and I can't find an answer to this specific problem that I have... WPF binding seems to be great and all, but I end up banging my head against the wall more often than not.
Okay, I have a singleton class which is ultimately the one that I'm binding to:
Imports System.ComponentModel
Imports System.Collections.ObjectModel
Public Class AmandaSeyfried
[Code].....
If I throw some break points on the Getter and Setters of the CountryTranslation class, I can monitor when they're being changed (via the datagrid, so binding is working), but try as I might I can't figure out how to raise an event based upon that back in the main class to subsequently update the datastore to show the changes.
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Feb 15, 2012
Is there any way of adding a control to a container within a structure declaration in VB .NET?
What I would really like to do is:
[Code]...
But this doesn't work in VB .NET. Is there anyway of achieving the same thing?
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May 20, 2011
I have a function which iterates through the TextBoxes in my form (and its child controls) and adds each TextBox's name and text to an ArrayList using a structure I called valTxtBox.
Here's a snippet of the
VB.NET
Public Structure valTxtBox
Public nome As String
Public texto As String
End Structure
[Code] .....
Now, the problem is that if I call Clear() for valsTxtBox in the getctrls() function, not all the elements get added to the ArrayList. However, if I don't call Clear() it works just fine. BTW, I'm using VS2008 express which might be relevant.
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May 26, 2010
Which is better, using a nullable enum or adding the value None=0 to your enum list?Using nullables requires more code, but I kind of like it since it forces me to think about the possibility. Otherwise I'm liable to forget about the None enum and fail to account for it being a special case.
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Oct 21, 2009
adding the properties of a control to its parent? Without having to rewrite all the properties... For example, if I have an user control with a button inside, and I want to have the "text align" property of the button, in the list of properties of the usercontrol. If not, is there a way of making the child control of an usercontrol editable?
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Aug 4, 2009
I created this custom listbox, and I want to change the border of the focus rectangle, so I made up this property:
vb.net
Private H_BorderColor As Pen = Pens.Black
Public Shadows Property HighlightedBorderColor() As Pen
[Code]....
But when I'm at the designer tab that property is editable, I attached a screen shot of the properties box.
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Sep 24, 2009
I'm writing a VB app to do stuff with some existing spreadsheets. I'd like to add a "properties" data structure to an Excel object and have two options:
1.
class ExcelPlusPlus
Dim properties As HashTable
Dim xlobj As Excel.Application
End Class
2.
class ExcelPlusPlus
Inherits Excel.Application
[code]....
I much prefer solution 2, as ExcelPlusPlus should respond exactly as Excel.Application.However, Visual Studio (2005) errors out on the "Inherits..." line saying "Classes can inherit only from other classes"
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Jan 10, 2010
I am trying to add up numbers in a listbox.I know how to add them up and make them display on a messagebox but what I cant do is add the numbers in one listbox and then add the numbers in another listbox and subtract the total of the numbers from 2nd listbox from the total of the 1st BUT instead of displaying them on a message box how would I output those results into a label?This is the code I have for outputting the totals of a listbox onto a message box:
------------
Dim intTotal As Integer = 0 'Running
Dim intX As Integer = 0 ' Index Position
For intX = 0 To lstDebitsBalance.Items.Count - 1
[code]....
btw the name of the second listbox I want to sum up is lstCreditsBalance
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Sep 2, 2009
Can we add a user defined property to a textbox (NOT TO A TEXTBOX CLASS)?
e.g. MyTextBox.MyProerty = "GOOD"
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Mar 2, 2012
I have a class that represents the table of a db-row. Its properties are the columns of the table. I add a new row to the table with the following code:
Public Sub AddRow(oTestRow As TestRow)
Dim sql As String
With oTestRow
[Code]....
That is just an example, but my classes have around 30-40 properties and this brings a very large and complex sql string. Creating, editing or maintaining these sql strings for many classes could generate errors. I am wondering if any compact way or method exists in order to add the whole object's istance (the properties of course) to the table "TestTable" without writing such a large sql string. I created the TestRow in the way that its properties are exactly the columns of the table "TestTable" (with the same name). But I did not found in the ADO.NET anything that could be used.
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Sep 23, 2011
I have a tab control, that the user can add/remove tabs as they please. It is an inventory manager, and the tabs are the departments. Everytime a user adds a department, a new listview is cloned and added to the page. Upon form load, i need it to go through the tab pages, and query the database for items matching the department their in. In other words, if the Department column in the inventory database, matches the Tab Pages text, add it to the listview inside that particular page. I've tried several things, but they all end up buggy. Either it adds them all to the first listview, or it skips every other page, or worse - doesn't add anything at all. Here is the code I have, could anyone help me figure out how to:
Cycle through the pages, if any of the DB's rows Department column matches the tab page text, add it to the listview inside that tab page, then move to the next tab page, and cycle through the DB again. Here is my code, a decent start I believe.
Sub FillList()
Dim incs As Integer
Dim inc As Integer
Dim lst As ListView
[CODE]...
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Mar 3, 2010
i am making a table through vb.net code (htmltablecell, htmltablerow..) no this table populates with an sql query and works perfectly. but inside this table in one tablecell, i need to add a dropdownlist which shall require a completely differernt query and shall run on its own on each row. so the code is as follows
Sql = "..."
rd = ExecuteReader(SqlCnn, Sql)
Dim newcounter As Integer = 0
While rd.Read()
[code]....
the ??? in the code is where the dropdownlist shall get populated each time with its own datareader and while loop and query.
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