Is It Correct To Correct Properties Values On The Fly
May 15, 2010Is it correct to correct properties values on the fly? for example: (note the .ToLower)
Public Property X() As String
Get
Return _x.ToLower
End Get
[code]....
ADVERTISEMENT
Is This Workaround/architecture Correct Using Classes (complex Properties)?
Feb 15, 2012what's a Class, and Object, a Method, a property and thins like that, but I have this doubt:Let's supppose I have a class "Laundry" this class has (just for this example) 3 propierties:
1.- laundryID
2.- Name
3.- Washers
Id and Name are "primitive" types or simple types (integer and string), but Washers, represent a list of object of type "Washer", that has 3 properties:
1.- washerID
2.- laundryID
3.- capacity
4.- brand
All of them (for this example) simple/primitives types (integer,string,string).So this my dilemma, it is correct to have a constructor like this (VB .net)
public sub new(ByVal laundryID as integer)
'' Here I'll query for the data of the Laundry on DB
'' After that I will query for every washer that belongs to this laundry
[code]....
And inside of that constructor query for all the washers that belongs to the laundry with id=laundryID parameter, and create objects of type "Washer" and add them to the list of Laundry ?I'm not sure If I explain myself, any comment I'll be really grateful, in less words, what's the correct approach (or good practices) to work with class/objects that has properties which are complex (other class/objects).I usually work with ADO.net probably ADO/LINQ/Entity solve this thins in an transparent way, but if they do it I don't really know it.
Note: I'm familiar with VB.net, C#, PHP, so if you prefer explain/help me using examples with its syntax, it's ok
Connect To SQL DB Receive The Code And Then Check If That Code Is Correct And If Its Correct Download Silence The Pro File?
Jun 8, 2010i'm working on a system that upgrades a basic version to a proversion but i have a payment gateway . it generates a code in an SQL DB.now i have a form in VB that has a textbox and a button how can i let VB connect to my SQL DB receive the code and then check if that code is correct and if its correct download silence the pro file. from an url.
View 7 RepliesHow To Set Some Of Correct Values
Apr 17, 2012My VB code uses a timer with a slider, and uses AddSeconds. I am trying to use the slider with a min value of 0 and max value of 600, and set up ticks every 30 seconds between 0 and 600.At a beginner level coding VB,I am not sure how to set some of the correct values in the slider's property box.Min, Max and Value, I am guessing are 0, 600 and 0 (sets the slider thumb starting positionat the far left). But I am not sure what other values, like tick and small and large change, etc. need to be set and set to what value? I've read online, but so far cannot find how to configure this.
View 10 RepliesVS 2005 Getting The Correct Number Of Attributes To Match The Correct Number Of Text Boxes?
Apr 18, 2009I have created a basic query generator which allows a user to select the Select, WHERE and criteria attributes using a number of checkboxes.However i have got stuck. In the results form i have the following code
Private Sub DisplayRecord()
RichTextBox1.Text = ds.Tables("newResults").Rows(intCurrentRecord).Item(0)
RichTextBox2.Text = ds.Tables("newResults").Rows(intCurrentRecord).Item(1)
RichTextBox3.Text = ds.Tables("newResults").Rows(intCurrentRecord).Item(2)
[code]....
The program keeps on crashing if the user does not select the corresponding amount of display records from above for the amount of attributes they want for the SELECT part of the query in the intreface in form 1.
How would i go about making something where the number of SELECT attributes selected which are listed in a string create the correct number of textbox fields in the results form (form2)
Cannot Gen. The Correct Wave Values?
Nov 17, 2011Cannot gen. the correct wave values?
View 2 RepliesUse The Correct Values For The Constants?
Sep 24, 2010The code underneath works when I use WM_MOUSEMOVE but not when I use WM_NCMOUSEMOVE. Is WM_NCMOUSEMOVE not supported anymore?I use the correct values for the constants too.Protected Overrides Sub WndProc(ByRef m As Message)Dim MousePosition As Point
Select Case m.Msg Case WM_NCMOUSEMOVE MousePosition = New Point(m.LParam.ToInt32())
If MousePosition.Y < 50 Then CloseButtonState = ButtonState.Flat
Else
CloseButtonState = ButtonState.Normal
[Code]...
Function Is Not Returning Correct Values
Jun 18, 2009Ok simply my code doesnt want to output the correct number. I'm working on the project euler probems to expand my knowledge in VB.net and the current question I am working on is asking to work with triangle numbers. while researching I found that a triangle number can be calculated by using the formula:
[Code]....
Textboxes Not Displaying Correct Record Values?
Nov 29, 2011I got 100+ textboxes that display record values. Most of the textboxes display correct values but several textboxes doesn't. These are the same textboxes. And they only display wrong values if I edit a record for the first time. After correcting the wrong values in the textboxes the first time, they display correct values in succeeding editing of records. Tried to compare their properties and all but they are the same with textboxes that worked...
Private Sub english_proficiency_answersheet_Form_Activated(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Activated
Me.Text = "EPT Answer Sheet of " & gsLastName & ", " & gsFirstName & " " & gsMiddleName
[Code].....
Sql - Configuration File For .net (Unable To Pass In Correct Values)
Aug 30, 2011An exert from my config file looks liek this.
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings>
[Code].....
EDIT: I am able to pass in the string perfectly when using Visual Studio 2005. But when using VS 2003 and a loiwer .net framework it will not let me, unless I hard code it in.
Could something be enabled/disabled on one of these instances of VS? Or could this just be an error with the older versions of .net? I think I am using 1.1??(will have to check) in 2003.
(VB 2008) Login System Using A Database And Query Builder To Return The Correct Values
May 10, 2011I've created a log in system using a database and query builder to return the correct values, however, once the users signed in I need to bring up the rest of their data from the same table in the database. How'd be the best way of going about this? I'm not sure whether the log in should be changed to use the primary key as well.
View 2 RepliesAddhandler Is Not Correct
Dec 16, 2009My add handler is not correct for some reason. I don't know what I have incorrect. trying to add a row to the datatable upon formload. it says that NewM8_CustomersRow is not an event for BA_TruckingDataSet.M8_CustomersDatatable
[Code]
Cannot Get Calculations Correct
Aug 7, 2011I am doing homework, but i've done the work already. My Issue is, I cannot get my program to compile the calculations for the payments properly. Maybe I'm just too tired to see it, but It should be working from my view. Here is what i have so far...
Module MortageCalculatorWK5
'Loan Amount Input
Dim LoanAmount As Decimal = 200000
[Code].....
Correct Use Of Trim?
May 20, 2012I'm a bit confused at why this code does not trim "say" but instead only the first letter "s".
Public Class Form1
Public Declare Function GetAsyncKeyState Lib "user32" (ByVal vkey As Integer) As Integer
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
[code].....
Correct Way To Add App.Config
Dec 7, 2011I am new to VS 2010 and in my application I want to add an app.config to contain to variables.I have been adding the app.config through the solution explorer, add item, general tab, configuration file.However i have noticed each project creates a default app.config in the project folder but which doesnt show up in the solution explorer.
View 1 RepliesGet A Handle On The Correct Way?
Jul 2, 2009I am trying to get a handle on the correct way and easiest way to do things. By easiest I am not talking about being lazy just accessing and modifying later on. I have started using my own classes and such but I have a few questions. Sometimes I want to create a control on the fly through code instead of using the designer. Should I create this control in the main form file or in a separate class? If I make it in another class it seems harder to access later on. Then again if I dont know that the control is going to be created(user clicks a button to add a control) how can I access it? Also it seems alot harder to access certain things when it is in another class. For example if I create a new window in a class and then want to check if it is there or not it is alot harder to do.
View 5 RepliesGet Correct ID From Combobox?
Jun 28, 2011I have this student table with these columns: ID and Name. I binded this table to a combobox to display student's names. My question is how would I get the right student Id (in vb 2010) when I selected a student's name so that I can assign the student ID as a foreign key to the Teacher table.
View 7 RepliesKnow If VB Is The Correct Program?
May 24, 2010I want to be able to make a program that incorporates my spreadsheets so that I can get the the results of the spreadsheets without the look of spreadsheets, also everytime I let somebody loose with one of my spreadsheets it needs fixing within 24 hrs as they have totally screwed up the formulas. is Visual Basic 2008 the right program to do this?
View 2 RepliesRetrieving The Correct Value?
Aug 26, 2011I'm trying to download files and fill the progressbar correctly. The problem is that I'm missing something in the code below, because it doesn't work:
Dim streamer As MemoryStream = New MemoryStream
Dim reader As StreamReader = New StreamReader(streamer)
Using fs As New IO.FileStream(PathAndFile, IO.FileMode.Create, IO.FileAccess.Write)
[code]....
However, this is downloading the file.
Saving The Correct Tab?
Feb 14, 2011I'm trying to build a tabbed a notepad, I was using the tutorial from DIC to guide me along.The problem is, when I go to click save, how do I tell it to save only the tab I have open?Also, It crashes at line 15 of the SaveAs function, Error message says "Object reference not set to an instance of an object"Here's my code:
Globals:
#Region "Globals"
Dim Tab As TabPage 'Holder for the currently selected tab page
[code].....
C# - ComputerInfo.TotalVirtualMemory Is Not Correct
Oct 2, 2009I have a question about the property TotalVirtualMemory in the VB class ComputerInfo. I have checked this property from code on several different computers and the number is always 2047 MB. This is strange because I know for a fact that the virtual memory on these computers differ (~1GB, ~2GB and ~3.5GB). Does anyone know why it is like this and is there any other way to get the total and available virtual memory?
View 4 RepliesC# - Correct Way To Check If Nullable Has A Value?
May 8, 2011assuming v is a nullable, I'm wondering what are the implications / differences between these usages:
VB:
If v Is Nothing Then
If v.HasValue Then
C#:
if (v == null)
if (!v.HasValue)
C# - Correct Way To Get File's Size?
Sep 22, 2011I have retrieved all file names and store it to a string array. Following is the code:
Dim fi As System.IO.FileInfo
Dim file_size As Int32
'all file names are stored in Files string array
[code]....
Correct File Path To Use?
May 18, 2011i am using this as my file path of my information Private strInformation As String = Application.StartupPath & "Information.dat" however, when i deploy the application and install it...i get an error when it tries to access the file, am i using the correct file path?
View 17 RepliesCorrect Method For Resize?
Jul 15, 2009I use vb.net 2008 to create a desktop application.I have a form that is resized according to the size/location of the app bar (where the start button is)I have a toolbar at the top, a status bar at the bottom of the form and a grid in the middle of the form I want the size of the grid to be the maximum possible on my form.if and when the user resize his application bar (or move it from the bottom to one of the sides) my form size should change according to the new working area size:
H = My.Computer.Screen.WorkingArea.Height
W = My.Computer.Screen.WorkingArea.Width
is there a single event that I can use ? currently I called my resize function in several form events: Activated, ClientSizeChanged, Load,Paint,LocationChanged,RegionChanged.And still it is not working correctly! Resize the app bar size or move it form does not change !
If I minimize it and then display it again or click it - it changes size
Correct Time To Use Variables?
Jul 29, 2010for example
Dim CurrentSplitter As String = My.Settings.CurrentSplitter
lblCurrentSplitter.Text = "Current splitter: " & CurrentSplitter
vs
[Code]....
Correct Way Of Opening A Form?
Apr 10, 2009I am a bit confused on the correct way of opening a form. I generally practiced form1.show to open a form, but i came across the following code to open an form.[code]....
View 9 RepliesCorrect Way To Escape Characters
Jan 30, 2009I have a couple of strings (in Ms-Word) which I copy and paste into variables in visual studo. Ms-Word uses high ansi characters for double quotes ("x"). I need the same in my app too. There seems to be no easy way to do this.
1. Visual Studio converts them to simple double quotes ("x") if I let it format the line automatically (auto-indent/auto-format).
2. If I turn autoformatting off and put those characters, I can see the correct characters in the code in Visual Studio editor. But when program is run the behave same as the simple double quotes. They are treated as simple double quotes and converts to simple double quotes in the output.
The only way I could find out is to use Chr() etc. functions to concatenate the character codes at appropriate places. But that's tedious on large strings. I want something to escape these characters appropriately (just like we can put two double quotes to escape the simple double quote character). [code]
1. What is the correct way to escape these characters? I don't need string concatenation; I need it in one string (like x="abc").
2. Are there any other characters also which visual studio messes up?
Correct Way To Sort Using XSLT?
Nov 3, 2011Basically what's happening is that the XML nodes themselves aren't changing position. So I figured my XSLT was missing something.[code]...
View 2 RepliesDetermine The Correct Datatype?
Sep 21, 2011i have been redirected from the vb.net technet forum to use asp.net forums instead.
I am using some COM components within an asp-page or vbscript. As an example the code flows like this in vbscript:
set objectA=CreateObject("SomeComponent.A")
objectA.PropertyA="Some String"
objectA.PropertyB=ValueA
set objectB=CreateObject("SomeComponent.B")
set ObjectC=ObjectB.MethodA ObjectA
This code works fine and i can continue with the data in ObjectC.
Now i want to change this into ASP.Net with VB. If i open the COM type libraries in Oleview32, the datatype expected in MethodA is VARIANT. So i tried to pass into a type of Object in MethodA. This leads to an exception and code stops.
Is there a way to determin or to trace what vbscript is passing into MethodA so that i can get an idea of how to prepare the datatype i have to pass into the method-call? Are there any tools for that? So ctypeing to an object does not do the trick. A better documentation about the COM Object is not available.
The first reply from the vb.net guys was´, if the COM libraries can be hosted on iis? So, they are used excessively within asp pages on iis 7.5, if they can be used in asp.net, i don not know. I am not a developer but i have good understanding in writing code and using asp.net.