I have a list of variables that are being created on one line.
Dim strFirstname, strMiddleName, strLastName As String
Is it possible to set the values for all of them at once? I know this doesn't work, but this is what I'm trying to do :
Dim strFirstname, strMiddleName, strLastName As String = ""
I am trying to bind a few values in xaml to variables declared in the code behind.
e.g.
vb.net
dim test as integer = 2
[code]....
I have a simple table in an access database that I'm using in a VS2010 project. I have a combobox control that a user can select the horse power of a motor. I then take that selected value from the control and copy it to a string variable called gstrSelectedHP. All I want to do is run a query that will pull up the full load amps of that horse power motor from the table. I have the query already, but I need to somehow put the gstrSelectedHP in the WHERE part of the query so that it only returns that value.
View 14 RepliesRecently started swicthing our project from 1.1 to 2.0 framework:
getting lot of errors:
Saying VBNullString is not declared
If ScanString <> vbNullString Then
Stored = ScanString
End If
[Code]....
I'm trying to create a generic Controller Class for generic events. But these these events still need to access their class variable. So my idea is to create the Base Controller Class with a ModelBaseclass variable as _ClassVar, which is inherited by all of the other class Controller classes will derive from. But I want the derived controller classes to override the _ClassVar with whichever one they need.
I want to do this, so the ControllerBaseClass can have all the generic functions that all the Derived Classes would use.
Model :
Public Class ModelBaseClass
Public Overridable Function Foo() As String
Return "Name"
[Code].....
I have the following code and i do no know why the program tells me that the variables are not declared.
[Code]...
I have declared 2 variables as Double in my VB Code. Example:[code]Somerwhere down the code, after some internal calculations, the variables A1 and B1 have attained new values. Example:[code]Do I need to do a conversion of some sort in my program codes ??
View 12 Replieshow variables declared with protected access in a base class are used to implement inheritance.
View 1 RepliesI am developing a program where i will download and save an xml file from a url as abc.xml. I open the abc.xml in a datagridview with a dataset without problem.I am confused how can i read raw per raw the datagridview and assign the data in a database table? i am using vb 2008 + msde2005 express.I show the whole content of the xml file in the datagridview with the following [code]I dont know how to create a loop where i can read the datagridview line by line save data in variables (ex.strings) and save it in a databese table?
View 6 RepliesHow would i go about reading a file Line by Line that within that line The values are delimited by " Example of the data:
"bob" "cat" "1243"
"steve" dog" "6789"
I've started this with this code but not sure how to go about the next stage:
Using MyReader As New _
Microsoft.VisualBasic.FileIO.TextFieldParser(My.Application.Info.DirectoryPath & "Records28112011.jd")
MyReader.TextFieldType = FileIO.FieldType.Delimited
[code]....
In re-engineering a windows forms application, I find that a lot of code-behind in the various form classes is duplicative and I'm trying to centralize as many procedures as possible into a base class which can be inherited and used by the subclassed forms.
This process seems to be going well and is making the code in my subclasses much simpler and hopefully easier to maintain, but I'm not sure where to draw the line between leaving code in the subclasses and engineering for generic resusability and moving it to the base class.
Specifically, in some subclasses I have code which manipulates variables and objects specific to the subclass, and although I could move the code-behind into the base class, the base class code references specific objects which are needed to compile. For example, each subclass manipulates a databound datagridview and form detail controls which allows the user to select between multi-record and detailed single-record views of a datatable.
In Visual Basic 2008 do I need to declare dummy data objects in the base class so that the base class will compile? Or is there a way to indicate that the data objects will be provided by the subclass?
I've been building a simple card game in VB using VB 2010 express. I've built a simple Card class, as follows:
Public Class Card
Public Property Number As Integer
Public Property Suit As String
Public Property Image As String
End Class
I setup a base deck to create the unique, individual cards, which will then be used in multi-deck games. I have a game table form where the cards will be displayed. I declared this base deck inside the game table form and built it during the form's load event:
Public Class Main_Table
Public baseDeck As List(Of Card) = New List(Of Card)
Private Sub Main_Table_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim myCard As Card = New Card()
[Code] .....
Everything runs fine up until the end of Main_Table_Load. I've inspected the baseDeck values and they are correct. But when the Build_Deck_Click sub is invoked, the baseDeck collection's values become all the same, specifically it becomes composed of copies of the last card I built. I've stepped through the code and expanded baseDeck to confirm that all Cards become the same. I've tried moving the Public baseDeck As List(Of Card) = New List(Of Card) to a different module, with the same results. Since I will be using the baseDeck list through the app, I can't declare it privately inside the form_load event, as I'd have to re-create it every time I need to use it.
I have a VB .net application which works fine on a 32 bit systems. We tried using it on a 64bit Windows 7 system but it failed. So I set up an environment in a VM (windows 7 64bit VS 2005 SP1 all updated) and started debugging there. The problem I come across is, I have a module (Public variables and function declarations from a driver provider FTDI). When a function from module is called the result is saved in a variable also from module. But the problem is the variable is not declared.
View 1 RepliesI am looking for a good resource on variable naming conventions to illustrate variable type and where variables are declared. So I will have public variables, Private variables, private or local variables. I also may want to declare variables with the same name in different class code (i.e. in the code behind different forms). I am assuming good coding would dicatate a prefix for declaration location.
View 4 RepliesHow do i read through a textfile line by line checking for and removing duplicate values?
View 1 RepliesI have an object that I know was originally declared was an enum, but I need tothe specificnum type. I'm aware of the GetType method and it appears to work correctly, but I can't figure out how to go from there to a direct type comparison For reference types, you can use Typeof(object1) Is Class1, but this doesn't seem to work for value types.
View 3 RepliesPrinting Work Orders from with in a .NET scripted screenSummary of code:
Public Overrides Sub onload(ByVal e As ScriptonloadEventArgs)
Dim CWONO As String
SetValue("CWONO") = "WO_Number" '(This field is automatically created with previous code)
[code].....
My Form have a multiline textbox. In this textbox, theres lines like that:
name1 - phone1
and i have to convert every line in 2 variables (or array). eg:
name = "name1"
phone = "phone1"
I have a text file that has a list of certain values and I need to read each one back to the correct variable.
View 2 Replies1) Lets say I have three textboxes: TextBox1 TextBox2 and TextBox3.
Public Sub loopthing (ByVal input1, ByVal input2, ByVal input3)
For i = 1 To 3
TextBox(i).Text = input(i)[code]....
I know that the (i)-thing will not work, but my question is if it's possible somehow to set the three textboxes text to different variables using only one line of code (Like my attempt above).
2)How can I do so that when I click a tabpage on runtime, a certain textbox is highlighted and ready to write without a mouse-click?
I've tried the tabpage's GotFocus- and Enter-events, and writing
TextBox1.Select()
there, but it only works the first time I enter that spesific tabpage.
3) - Moved To Its Own Thread In Application Deployment
I would I have a program that I use in the computer in my network, but for every user I need to edit the source to this user, thus the user cannot edit his information, just use the program how it was ... So, looking over the internet I found a "program" that may contains my solution... Its a Keylloger, I'm not meaning use this keylogger, no, but it has a a very interest feature: I use the main form to edit the information then after all it create a new program with the new information inside... I use my main program to create every userprofile then my program create a new program with the profile inside...
View 12 Replieswhat if you created a pool of numbers: 1 - 21 and then chose a random selection from the pool? Something like the following:[code]This gets rid of those messy if statements and all of those loops.
View 1 Repliesi had a look at how to set values of variables from nummbers stored in external txt files the variables then needed to be added up so i used trial and error first
((XVAL) + (NEWVAL))
assuming that XVAL was set to 10 and NEWVAL was set to 20 i expected to get the answer of thirty but waqs presented with the new value of 10 20 VB.net pysicaly added the two values together but i wanted the mathematical product of the two which is ((10) + (20)) = 30
I'm passing a value to another form and later on use that value that is assigned to a variable.
Here is the code.
loadingPage.Show()
mode = "notime"
Dim ld As loadingPage
[Code]....
CurrentMode doesn't have a value. I don't know why. CurrentMode is a global variable.
I have a VS 2008 C# application that I'm converting to VB 2008.
This statement in C# works as I expected:
IPAddress IPAddr = new IPAddress(0xFFFFFF0A);
IPAddr has a value of 10.255.255.255.
However, in VB this fails:
Dim IPAddr As New IPAddress(&HFFFFFF0A)
with invalid argument (the parameter of IPAddress should have type Long).This also fails:
Dim Addr as Long=&HFFFFFF0A
Dim IPAddr As New IPAddress(Addr)[code]....
does not produce a value of 4294967050, but -246. It appears to have defined a .net type of Int32, not Int64.How do I declare an Int64 variable in VB using a hex constant?
I have 3 variables. Lets call it "a", "b" and "c". These 3 variables can "independently" have 3 different values. Lets say: "1", "6" and "10". when you think of them as combination; there are (3^3) 27 combinations. I am told that it can be done through the recursive functions. However i am not a good developer to handle with that. Would u please help me?
- 3 variables and 3 different values are simplified. In fact; the numbers of variables and different values can vary.
- i know only the language, visual basic in .net; please don't answer in other coding languages.
additional note: i am going to put the these combinations in the string format into a collection.. for example "1;1;1", "1;6;1", "1;6;10".. and so on..
I have a database in my app which loads and displays some information on a form by binding the Comboboxes and Textboxes. However, I need to get some of the other values from the database for calculations before they are displayed on the form and I can't seem to find out how to do this.I could bind a couple of Textboxes to the database and then use those values to calculate, but it doesn't seem like a very efficient way of doing things.The dataset is created using the wizard and the controls are linked in the UI.
Please bear with me, I'm still a noob.
xmlreader and assigning variables values in .net 2.0?
View 2 RepliesI 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.
I am programmer from some time only, I have certain doubts in fundamentals, could you please clarify on the following:Case 1:
[Code]...
Does case 1 and case 2 yield same result, I mean is a private value necessarily in there?, can we use property itself to use its own value in its Set and get statements?