Visual Studio - .NET Accessing Class Variables In Dictionary?
Mar 26, 2012
I'm not sure of the syntax necessary to access a class's attributes inside of a Dictionary declaration.
[Code]...
So if I want to test it and use MsgBox() how do I trickle down to pull, say, name in food > cheese1 > info > attributes2 > name?
EDIT:I just realized that Array in info needs to be a Dictionary for an associative array, so please ignore that error and just assume it is a Dictionary for this question's sake.
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Feb 15, 2012
I am using this example I found to learn how to load class files and access variables through them. This is in a file called Class1.vb in the App_Code folder (this is not an app project):
Imports Microsoft.VisualBasic
Public Class my_class
Public Shared Sub my_sub()
[Code]....
How could I access the vartest variable without using a session, since if this is accessed by multiple functions at the same time the variable can be overwritten I assume. Is it possible to go the other way, where a variable is sent to a class file?
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Apr 10, 2009
I am currently working on a project of "interpreting" C# into VB. The project involves adding images to a database, retrieving images from the database and presenting them in thumbnails. Right now I have the following Public Class with the Variable that needs to be assigned:
VB:
Imports System.Data
Imports System.Drawing
Imports System.IO
[code]....
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Apr 30, 2011
I developed a small application which accesses a MS access database on my computer using VB.net. I developed the program on windows xp 32 bit. At the moment I am using windows 7 64 bit and the program simply will not run. I get a null reference exception when I try to do anything to the database. I have narrowed this down i THINK to the db provider. I was using Provider=Microsoft.Jet.OLEDB.4.0; and tried using Provider=Microsoft.ACE.OLEDB.12.0;. Neither seems to work. The path to my database is 100% correct. This is the error I am getting:
Null reference exception was unhandled.Object reference not set to an instance of an object.
Like I say the program runs fine on the windows xp machine. If it helps the access database file extension is mdb.
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Dec 27, 2010
I sucessfully write a file containing variables with the following code:
Private
Sub
SaveConfigButton_Click(ByVal
[Code]....
The variables do not populate.
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Feb 5, 2011
E.g. I have a class:
Namespace Common
Public Class AClass
Public Class BClass
[code]....
How can I use BClass without saying AClass.BClass, I've see some existing code using this format, but I can't find the setting.
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Jul 10, 2011
I need to read some information from a txt file and put all that info to a textbox (this is ready and done)but the textfile have some variables like %userName% that i need to replace programatically in vb.net?example of text file:hello %userName% , this is an automated report of the uses of your account. this is what the txt file have in it, when i read it to vb.net and put that info into a textbox is done right, but the question is how to replace the %userNams% for some text in another textbox and replaced when i press a button?
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Jul 19, 2011
Now to working with Visual Studio Solutions, but I am trying something very basic but no joy. So in my project I have a folder App_Code and in this I added a class called Test.vb and added a simple function
[Code]...
But in my Default.aspx page I am struggling to find the correct syntax to call this method. Also it doesnt seem like my Test2.vb class is correctly included in the project because If I make a type the project still builds successfully when it shouldnt
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Oct 31, 2011
In Visual Studio 2010 express (using vb.net) I've somehow set two forms to use the same class.
Basicly I have two designer files with 1 implementation each. For some reason both designer files are calling the same implementation file, and I can't find any settings to correct the problem.
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Jul 15, 2010
I have created a user control which is inside a folder called Controls and the class is a partial class which inherits from Web.UI.UserControl. Now from my page which is one level up I just try to access the method inside the usercontrol and so trying to cast it as the type of user control.
But I get build errors. It just cannot recognize that class. I get Type not defined error. But at times it has recognized the class. Dont know why it does that.
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Dec 5, 2011
I have a visual studio solution written using VB.net. The solution contains 4 projects.
[Code]...
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Oct 27, 2009
In C# code, we can just right click on the class name and then select refactor and then extract the interface for that class. I wonder if this could be done on VB. Im using the same IDE VS 2008
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Apr 16, 2009
I have a solution made up of several projects. Everything is properly referenced, the solution builds and runs. Now, when "view class diagram" for this class, it doesn't show any fields. It shows "dmxProgram" as a property, but it doesn't show any of the non-property private fields. Therefore I can't add associations to my class diagram for those fields that do not appear.
[Code]...
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Mar 15, 2012
I need to use the "<>" (not equal to) operator for a peice of coding which uses the SheduledAction class, but I keep getting this error:
Error 1 Operator '<>' is not defined for types 'Microsoft.Phone.Scheduler.ScheduledAction' and 'Microsoft.Phone.Scheduler.ScheduledAction'
Here is my coding thats bringing up the error:
Dim hw As ScheduledAction = ScheduledActionService.Find("Hello World")
If hw <> Nothing Then
...
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Sep 17, 2009
Does anyone know how to get my class name and method name dropdown lists again? It's the dropdown lists that are usually above the code. It's just a setting but i can't seem to find it. I don't want to reset my setting btw. I shouldn't have to.
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Mar 3, 2009
I am writing my first class-library in VB.NET. My idea is to distribute this library so others may use it in their applications.However, perhaps due to my lack of experience in writing and structuring the library and the classes therein, I noted that the methods/properties are ALL being shown in the IntelliSense of Visual Studio.
The thing is that many of them are only used within the library itself and should NOT be used by the developers (could create a disaster) when they incorporate my library in their application - only a few should be visibile i.e. the ones which are needed by the developer.Thus, my question is: is there a way to hide certain methods/properties of my library from Visual Studio's IntelliSense? Maybe something similar to REM?
EDIT: as mentioned - this is my first library and I now understand that my question could be intepreted in two ways:
1) how to hide something from IntelliSense
2) how to prevent a developer from using and calling certain methods/properties
Of course, the end-result that I want is that the developer is not able to access AT ALL certain methods/properties i.e. No. 2 above.
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Oct 12, 2011
WebMatrix is a web development and deployment tool by Microsoft so how is this compared to Visual Studio? which Use C# Razor Syntax is that more better coding.
[Code]...
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Sep 23, 2009
My VB project is large enough that it requires several files. It was originally developed as a Console App and I created each file as a MODULE. All modules could use subroutines, data structures and constants from other MODULES and everything worked fine. I needed to add basic windowing to the app and this required that the app be converted from a Console App to a Windows Forms App. The main window is Form1 which is not a MODULE but a CLASS. The problem is that some MODULE based functions cannot access subroutines, data and constants that are defined within the CLASS Form1 unless they are incorporated into the CLASS file and this makes the CLASS file very large. If I add a new Class file to the project, it also cannot interoperate with Class Form1 in the same way that multi-MODULE code interoperates.
How does one spread CLASS code across several files and still allow it to interoperate as if it were in a single file? Alternatively, how does one create several CLASS files that operate the way multiple MODULE files operate.I am sure that there are all kinds of best practices that I am violating but the goal to to get some prototype software working and interfaced to some lab equipment.
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Dec 4, 2009
Visual Basic Project - Student Check In Form using an Access database backend This form needs to draw information from an Access database containg tables for STUDENT, INSTRUCTOR, and SECTION. These all need to have primary keys and ids. When (the user) clicks on the drop down box that displays all the sections:
{Table Tennis 1, Table Tennis 2, Table Tennis 3, Billiards 1, Billiards 2, Billiards 3}This should populate the listbox or datagrid from the STUDENT table with the Students that have the same SECTIONID as the SECTION selected in the drop down menu above.
After the Student list has been populated (the user) clicks on a student name in the listbox/datagrid and this inserts that student into the CHECKEDIN table that has a datagrid/listbox associated with it.
This is a great project to practice connecting a database to Visual Studio 2008 .net and playing with the data that has been pulled in. You could use SQL instead of Access.
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Sep 15, 2009
I have to compile projects which was compiled in Visual Studio 6 in Visual Studio 2005. When i compiled i got a set of same error. I opened the project for VS6 by selecting File->open->project/solution and tried to build a solution by Build option but i am getting the following error.
[Code]...
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Apr 11, 2011
Is it possible to open visual studio express files with normal visual studio?
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Sep 17, 2011
I am currently attempting to create a VB.Net script that pulls up information on installed printers. I am using Visual Studio 2010 SP1, and as my target program needs to run on older machines, is currently built using .Net 3.5.Looking online, there are several methods on how to do this, one from url...the code is supposed to use System.Management as you can see. However, after importing System.Management, Visual Studio throws an error and states that ObjectQuery, ManagementObjectSearcher, and ManagementObject are not defined.a quick look at the MSDN forums shows that ObjectQuery is a class of .Net 4, 3.5, 3.0 and 2.I figured the error might be because I didn't have the .Net 3.5 SDK installed, so I installed the .Net 3.5 SP1 SDK to no avail.just to make clear, I am importing System.Management at the top "Imports System.Management"
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Nov 27, 2009
I have to develop an application using MS Visual Studio 2005 or above with the following objective:
* The application should allow users to create as many new forms as they want and each form should behave like a MS Visual Studio WinForm. By saying that it should be a container for drag and drop of controls from the toolbox that I will develop....
* Once the user design's each screen to his taste by placing various controls on the form, he should be able to save the form as a screen. Of course I have to provide functionality for each of the controls such as if he drags a button on to the form, he should be able to specify what action it has to perfom when clicked when the application is put into run mode. Quite similar to regular windows form button.
* My application should have two modes: a DESIGN MODE, where user can drag, drop controls and specify what they should do when put into RUN MODE. This is quite similar to MS Visual Studio designer.
* Last but not least is to be able to access the application via the browser with the same look and feel his desktop version.
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Nov 26, 2009
I have to develop an application using MS Visual Studio 2005 or above with the following
objective:* The application should allow users to create as many new forms as they want and each form should behave like a MS Visual Studio WinForm. By saying that it should be a container for drag and drop of controls from the toolbox that I will develop....
* Once the user design's each screen to his taste by placing various controls on the form, he should be able to save the form as a screen. Of course I have to provide functionality for each of the controls such as if he drags a button on to the form, he should be able to specify what action it has to perfom when clicked when the application is put into run mode. Quite similar to regular windows form button.
* My application should have two modes: a DESIGN MODE, where user can drag, drop controls and specify what they should do when put into RUN MODE. This is quite similar to MS Visual Studio designer.
* Last but not least is to be able to access the application via the browser with the same look and feel his desktop version.
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Feb 17, 2010
Will i be able to successfully install 2010 beta 2 side by side 2008? because i want to test 2010 features and some development toolkits such as silverlight while i don't want to uninstall my visual studio 2008 professional.
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Mar 20, 2009
I have a Visual Basic project and when working and modifying code, the compiler will crash and then a message will say something like "Microsoft visual studio encountered a problem and was shut down." I've tried editing code from the solution and the project. Both produce the error. Usually occurs when adding an "IF...Then..." condition. May work for hours but then crash. Solution will compile and build.
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Mar 8, 2011
with the code:
T02FldDct01("DPF01") = "ABC"
T02FldDct01("DPF02") = "DEF"
T02Database01.Open()[code].....
I am getting the following error at the ExecuteNonQuery() line: "Parameterized query 'Update Table01 Set T02=@DPV01,T03=@DPV02 Where T01=@T02Ctr'
expects a parameter value which was not supplied. Parameter name: @DPV01"
T02 is a nvarchar field.The Dictionary was defined and populated as follows:
Dim T02FldDct01 As New Dictionary(Of String, String)
T0201 = "01"
T0202 = "02"[code]....
why the update routine will not recognize this Dictionary variable?
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Mar 23, 2012
I define some global variables of a class as follows:
Private Class MyClass
Private var1 as Decimal
Private list1 as List(Of string)[code].....
But I found that after this form is closed, all above variables, var1, list1, list2 still exist in memory. I thought they should be collected by gc since the form is already disposed as I confirmed.
Add: I have monitored half an hour after the form is closed. But these variables are not collected by gc. I have an automatic update procedure on the form which uses above variables.Since the above variables still hold values, the automatic update procedure is always called which causes exception. (One quick fix is to check if form.isDisposed in update procedure. But I do not think this is elegeant. Besides, these variables occupy memory.)
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Jun 13, 2012
That question sounds maybe a little confusing so I'll try to explain it with an example.[code]...
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Jun 9, 2012
I'm new in .NET programming.I have a class Form1 that includes Button1_Click event.Button1_Click creates a multiple Text Boxies at run time)Here is the class:
Public Class Form1
Dim shiftDown As Integer
Dim counter As Integer
[code].....
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