Correct Time To Use Variables?
Jul 29, 2010for example
Dim CurrentSplitter As String = My.Settings.CurrentSplitter
lblCurrentSplitter.Text = "Current splitter: " & CurrentSplitter
vs
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Get The Correct Calculations Out Of Variables?
Dec 5, 2009I am unable to get the correct calculations out of my variables. If I input say fgh2 and enter 5 for monthly sales everything displays fine. enter fbd2 and 5 for monthly sales again everything is fine I get a result of 10 but as soon as I deviate from that formula like ftp1 and 3 in the monthly sales textbox it comes back as 13 in the newCarLabel when it should be 3
Option Explicit On
Option Strict On
Option Infer Off
Public Class MainForm
'global variables
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Modify Time Span In Comparing More Than 40's Variables Time?
Mar 16, 2012i have difficulties in making school schedule time and school bell? how to modify time span in comparing more than 40's variables time.
View 3 RepliesNot Getting Correct Time From UniversalDateTime?
Apr 16, 2009I send a vcal through mail in web application with convert datetime to universal datetime.If i run web application locally (local sevser in India) i get correct time in my vcal.But run appication live (server in US) then not get corret time with a difference of 1 and half hour
code :
Dim result As StringBuilder = New StringBuilder()
result.AppendFormat("BEGIN:VCALENDAR{0}", System.Environment.NewLine)
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.net - Filtering SQL By Correct Time Spans?
Feb 23, 2010I have a table that has two time columns. One is a login time one is a logout time. I would like to be able to filter between the two, basically greater than the minimum selected and less than the maximum selected. I am using a monthly calendar to get me the spans of time but it is not working correctly. From there I would like to add the 4 columns in the table to a gridview. The date in the DB is the in following format:
2/23/2010 11:17:01 AM
I know how to get single elements from the table, or a column but not entire rows.
So i guess I have 2 problems, getting the filter for the SQL correct then binding the results to a table.
Here is my code so far:
Dim cn As OleDbConnection
Dim cmd As OleDbCommand
Dim str As String
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SLaks has answered most of my question, one problem remains. I need to figure out how to make it so the monthcalendar can select just one day and return that days values. Seems like the time is an issue since it is in the DB as stated above. Just comparing the dates is not enough.
VS 2010 Get The Correct Time Online?
May 14, 2012is it possible to get the correct time online? Because we are currently making a system that requires date and time. We are preventing a common error where the system time is outdated so we are going for online time and checking it in out system.
View 2 RepliesRemember The Variables For A Set Period Of Time?
May 9, 2011I have set up a simple quiz where you drop answers to the correct question. I have implemented a system where the are 18 text boxes (9 for questions, 9 for answers) and it can be customised but I want the questions to be able to be 'saved's since it in another form the if I give them special names when I close the form and open it again it has lost the values. Is there a way to remember the variables for a set period of time (cookies?) or if not just for that session?
View 2 RepliesCreate Variables In Real Time With Textbox?
Apr 6, 2011I recieved a gift recently visual studio 2010 ultimate a nice suprise I have been repairing and building PC's and networks for years working in local shops and buisnesses, but always wanted to learn programming so my GF purchased this for me nice suprise. So here is my beginner question. I am making a program that will take check info ( check number, amount, date and person or buisness wrote to). I have no plans on using it just trying to learn variable structures and arrays and thought this type of program was a good start. Now I would like to take the text of a text box in runtime and use that to input a new check number into the variable structure. Just so I am not confusing anyone I will write the basic code
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So what I would like to do is use a textox labeled check number to add check numbers into the checkrecord structure instead of having to add them into the code manually is this possible?
Variables Would Improve Script Execution Time?
Jun 20, 2012I was updating an old .aspx.vb script that was originally written with dynamically typed variables, like this:
Dim price I updated them to the following format (along with some IsDBNull checks to compensate):
Dim price As String After doing this to all of my variables, the script appeared to run noticeably faster. Is this a real effect of static typing, or is it just a coincidence?
Save Variables To Be Recalled Next Time The Program Runs?
Nov 9, 2009I am creating a very simple game for a project. There is opportunity for bonus marks, and one thing I would like to do is be able to "save" the game. The only thing I need to do is save about 4 variables to be recalled the next time the program runs.
What is the best way to do this?
I have searched Google, and there are ways to link the program to an Access database, but that seams a little extreme. I tried seeing if you can make an XML file to hold them, but I can't really find any good information.
Using For Loop Counter In VB To Change Variables Being Referenced Each Time
Jan 11, 2010We have a project that needs to gather survey data. On one particular page of the website, there are 21 questions each with a scale of 1-5 where the user selects one radio button for each question in the table. The survey is being coded in VB.NET. The data submits to an SQL database. All the radio buttons are similarly named, so only the number changes for the question [Code]
View 2 RepliesVB 2008 Receive 4 Character Variables (0-255) All The Time And Put Them In The Corresponding Textboxes?
Nov 21, 2011I Have a problem whit my code.I want to receive 4 character variables (0-255) all the time and put them in the corresponding textboxes:
Public Class Form1
'Dim WithEvents Comm1 As New IO.Ports.SerialPort
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Comm1.Encoding = System.Text.Encoding.GetEncoding("Windows-1252")
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I Want to send date when I want , but I want to receive data all the time (i want that textboxes 3,4,5,6 to update whenever data is comming an form is load).
Creating Multiple Forms At Run-time - With Variables Passed To Form
Oct 4, 2011I'm making a IM LAN Chat, and I don't want to limit it to a specific number of chats that can be open at any given time (By re-producing the forms and setting variables once a chat is open).
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Setting Global Variables Within Web Project On Login And Set Expiry Time
Dec 1, 2011I'm developing a revised version of a system I have been using for years, but with all the advantages of .NET features that were not around when I first made this. It's proving a steep learning curve! So, when a user logs in through my Login.aspx page which simply compares username/password to Database record, the system creates a session variable containing the user's Username and various other things. There are two type of variable which will be common to all elements of this system
User Specific data, Username, Permissions, etc
Setting variables, drawn from a database of pre-set facilities which are setup within the system, some will determine which facilities work, how they work, and some will be dependent upon the User's permission. Obviously, I could set everything within the Session data, but that'd be inefficient wouldn't it? If I were to set these globally available variables in my App_Code, how would I go about setting this up so that, for example, those variables which require a database call, are set for the duration of the Logged-In session and do not require constant Database lookups? Further to that, those variables which are dependent on the session state, would need clearing on each LogOut. I am using VB.NET.
VS 2008 SendKeys.Send() Method Does Not Send The Keys Fully Correct All The Time
Nov 9, 2009[Code]....
Now as you can see it is sending the textbox1 text and then pressing enter then sending textbox2 text! Theres quite a few problems in that but before i discuss note: This code is in a Timer. Problem #1: It does not send the keys fully correct all the time because its trying to send them all at once! So i want it to send them 1 letter after the other with 200 ms sleep in them! Problem #2: The sleep is not working: The reason i know is because even after it did the first textbox1 text it didnt wait that 2000 ms!
Correct Way To Compare Time In This Format "09:30:54"?
Jul 20, 2009What is the correct way to compare time in this format "09:30:54" ?
View 14 RepliesIs 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
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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 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)
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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)
NumericUpDown Controls - Update Some Variables Each Time One Of These NumUD Controls Changes Value
Nov 20, 2011I've got a couple of these NumericUpDown controls I put on a form. Without describing too much about the form I basically want to update some variables each time one of these NumUD controls changes value. So for each NumUD I have a call to a Recalculate subroutine within their "changedValue" event.
There are actually two problems. First, if I initialize the "Value" property to something other than zero in VB2010 at DESIGN TIME it won't even open the form when I hit RUN. It gives me a "No Source Available. No symbols loaded for any call stack frame" error. The error box says "InvalidOperationException" was not handled. So if I try to set the initial value of the Value property to anything but zero of either I get this error.
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VS 2008 - Take A String Of Variables With A Common Delimiter And Break It All Back Out Into Separate Variables
Dec 11, 2011Last year (2010) I came across a FANTASTIC command that allowed me to take a string of variables with a common delimiter and break it all back out into separate variables (possibly an array) with one statement.
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As long as the delimiter was a unique specifiable character, this one-statement command could break it out into elements. my memory and point me in the right direction.
Passing Multiple Byref Variables / Variables Fail To Change Calling Funct W/ Invoke
Sep 27, 2010I have code, shown below, that works all except for 1 thing: The variables being passed byRef get passed, but once modified in the else section of the "if me.invokerequired" code of RecordData, the variables are never updated in the calling function. To reiterate, the calling function does not receive the updated data that is in the variables custid and amt.When debugging, I see the data change in the else section of "if me.invokerequired", but once it returns from the callback the data is missing.[code]
View 15 RepliesDefine Some Global Variables Of A Class - Variables Occupy Memory?
Mar 23, 2012I 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.)
Memory Used In Declaring Variables Are Reclaimed By The OS When These Variables Go Out Of Scope?
Jan 7, 2010Does the memory used in declaring variables are reclaimed by the OS when these variables go out of scope?Does the memory used be released by setting thier value to nothing? if not, then how can I force the garbage collector to run or excecute at a certain/desired time..How about in Windows Forms..How can we make sure that the memory used in initializing and showing forms be released if those forms were closed?
View 13 RepliesMultithreading: Reading/setting Variables, And Passing Variables?
Mar 8, 2011Question 1: What is the difference between "Background Worker" and "Worker Pool" as indicated within the MSDN samples provided.
Question 2: I noticed while using, AddressOf _Function_, variables cannot be passed; what would be an efficient solution to this?
Question 3: While using multithreading is it required to invoke before setting variables, or only form properties?
Question 4: While using System.Net.Sockets is it safe/efficient to use Application.DoEvents while waiting for new data; or would be using a Do While loop be fine without DoEvents since the action would be multithreaded? Note: there can be up to 2000-3000 sockets in use at a time.
Use Variables Or Properties, And Global Or Static Variables In A Class?
Jun 9, 2012I'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
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C# - Convert A Date And Time To UTC Time Based On The Time Zone Of The User?
Sep 6, 2009I have an ASP.NET application with a SQL Server back end. I am storing all my dates in UTC format and doing the appropriate conversions to the local time zone of the browser viewing it. One of the pages asks for a start date and end date (no times).
I am taking the start date and setting the time to 00:00:00 hours (midnight) and I'm taking the End time and adding a time of 23:59:59, so that the date range covers the whole day. Now what I'm trying to do is do a SQL query to do a search for records in this date range. The problem is, the data in SQL is in UTC time and the user is typing their dates and times in their local date and times. My quickest solution was to convert the date and time to UTC, then search the records. However, by doing this, I am to believe ASP.NET converts the given time and date to UTC based on the server time zone. How can I convert a date and time to UTC time based on the time zone of the user?
Addhandler 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
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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
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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
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