If Statement To Check If Value Is +-1 Of Initial Value Held In A Var
Mar 9, 2012
I need to run an If Statement that will check a few conditions.
Basically I want to get it to check a value held in a variable "Temperature" and if the value is within "1" eaither way i.e. +-1 of the value held within the variable to then to output a text string to Label200.Text Else if the condition is not met then out put another text string to Label200.Text.
Example:
Say if Temperature value held in the variable Temperature is 8.5 the if statement checks to see if the DewPoint value is "between" +-1 of the temperature value. i.e. 7.5 to 9.5 as well as the value in Humidity is equal to or greater than 90 and Pressure is Less than or Equal to 1013.25 then the conditon is met, else the conditon is not met.
I have put some code together below in NotePad++ to see if what I am trying to do is the correct way to go about it (note I have not yet tried this code in VB.NET as I don't have it at work).
pass comment on the code and if it is wrong explain what I should do to get it to work.
Dim DewPoint as Single
Dim Temperature as Single
Dim Humidity as Single
[Code]....
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Dec 9, 2011
I wish to send a string held in a var to an IP address and Port number both also held in vars. I also wish to listen to a signals coming in on a particular port number so when particular strings are received I can trigger other transmissions.
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May 17, 2011
[code] I want to add a new try statement that will check a different folder and if its there, then redirects them... how do I insert an extra if statement without screwing the whole script up?
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Jan 1, 2011
Is it possible to check to see if the text in a textbox is present in a table/database and then display the corresponding data.
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Jan 12, 2012
i am probably overthinking this but how can i check the textbox for either a 655 or 699 in the first 3 numbers in the textbox? The current code i how now works but displays an error if (im guessing) it doesnt find the other number in the textbox as well:
[Code]...
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Oct 4, 2009
Is there a statement to check if a does not equal b? or is it necessary to
vb
if a = b then
'blank
else
[code]....
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Apr 2, 2010
I am a C# programmer but dabbling in VB.Net because everybody else in my team uses it. In the interests of professional development I would like to shrink the following If... Else... statement.
If cmd.Parameters("@whenUpdated").Equals(DBNull.Value) Then
item.WhenUpdated = Nothing
Else
item.WhenUpdated = cmd.Parameters("@whenUpdated").Value
End If
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Mar 5, 2010
my program is "live" and my customer has troubles because it doesn't functioning as well as it should.I don't know what happen, did I changed something or not but suddenly data won't save to database from newly created forms. Beside this form I have additional 20 forms and everything is working like a charm and I use same code logic to save data to database. I tried to find myself what could be the reason, check by entering data directly to database table (works fine), check insert statement of dataset table (seems fine, too) and everything I could imagine. But now I ran out of ideas and I had to ask here.
Also, I added 3 fields to database table (nvarchar, int and decimal). All 3 of them allow nulls. I changed dataset and data entry form and now data won't insert if I dont enter values to int and decimal fields. Also, this decimal field doesn't accept 0 value if enter but if I assign value 0 from the code than it is ok. I'm not sure if I somehow changed concurrency and somewhere. I tried to find where I can change it but I couldn't find it. I use Visual Studio 2008 and Sql Server 2005 Express. Language vb.net.
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Jul 14, 2009
How would I go about writing an IF statement that would check for letters? Something like:
IF field IS NOT Int THEN
Response.Write "WRONG!"
ELSE
Response.Write "OK"
END IF
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Nov 25, 2009
In my .NET application I have to get results from a MS Access database. I would like to add error checking to make sure a row was returned from my SELECT statement.
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Jun 17, 2011
Is it possible to define my list of strings like in 'good old' VB60, to use only on ebyte of memory for each character? .NET always seems to store any string as unicode, which doubles the required memory. The case is that I have a huge list of strings, all of the same size. It is about 50.000.000 items, 12 characters each. You can imagine I am running out of memory in no time. I tried converting them to arrays-of-bytes but in that case I loose the possibility to perform a "LIKE" statement in a FOR-EACH loop to check for a specific item.
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Dec 30, 2009
I am writing the code as on if statement that if the html class has strings called "<a id=""rowTitle1""(.*?)</a>" then do something. In what property that come after pattern that I could check the string whether if it valid or not??
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Apr 8, 2011
I need to create a Select Case statement to assign the per check processing fee:user inputs number of cks into textbox that i need to validate the input if user puts in a negative amount.
10 cents for <=20 cks written ea month
8 cents <= 20 to 39 cks written ea mo
6 cents <= 40 to 59 cks written ea mo
4 cents for 60 or more cks written ea mo.
Also, I have a label programmed to display the $10 monthly fee thats has to be included into the: Total monthly fees.
Here's the coding I have so far:
Const decSERVICE_FEE As Decimal = 10D
Const decTWENTY_OR_LESS_CHECKS As Decimal = 0.1D
Const decTWENTY_THRU_THIRTYNINE_CHECKS As Decimal = 0.08D
[code].....
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Sep 5, 2011
Well i've been trying to make something run with a lot less code(and faster) but it seems with SendKeys some things are getting lost(or discarded) by the program, its only the arrow keys as I try & make it complete a pre-defined maze to see how fast it can be completed.
If I use SendKeys("RIGHT 8") for example the maze usually only moves a few times, sometimes maybe only 1.
Also I looked up how to hold a key down/simulate it but it's not working for the arrow keys(untested on other keys).
The only way i've made it work is delays, decently delayed like 200ms & it's a huge maze but if i hold a key manually I can go much faster yet sendkeys method can't go that fast using individual presses this is why I want to simulate a holding down action.
---it must be working xample code I can make it work for my purpose if it works like on button click, etc....but I tried copying full (supposedly working) codes before & they never worked for me/my key, xample cause i've looked & tried hard(with only failing results).
MORE INFO:Also I tried SendKeys.SendWait() which is meant to wait for keystrokes to be processed & that didn't help either so my best guess is the keystrokes are processed but discarded(like a movement delay code that doesn't queue movements but rather ignores extra movements)
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Jan 22, 2010
I am practicing abit with For Loops. My code works fine which i am very happy about. I have now moved on to inserting an IF statement. I want the IF statement to check if my textbox1 and textbox2 are blank and if they are to notify the user that they must insert a value. I thought this would be quite easy to do however i think i was again ignorant to the coding! See below.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim answer As Integer
[CODE]...
I want to concentrate on the IF statement only as the For loop is working just as it should. When i run the program and leave both textboxes blank and hit the button i receive an error saying 'Conversion from string "" to type 'Integer' is not valid.'
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Aug 25, 2009
How to write a if else statement to check if the number user enter follow within a range.
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Oct 5, 2011
This is what I have so far for the following scenario: I want to have it so that if a users clicks submit without checking a check box from one section it throws up a dialog box that makes the process loop and give them a chance to check a box. The process wont continue until at least one check box is checked. The same thing above goes for my radio buttons as well. Here's my code:
[Code]...
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Feb 6, 2011
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I have changed the dictionary declaration to (of long) but get the same issue.
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Is there a way to make the ReadXML function take its input from a string instead of a file ? If not, are there other functions which can be made to parse XML which is held as a string.?
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Aug 1, 2011
Firstly, it loads the .zip file and extracts the boot animation in a folder called Temp. If there are existing files in the Temp folder it deletes them. But, once the boot animation is previewed, you can't select another boot animation, until you restart the application, because it gives an error, saying that the program can't delete the images, because the process is using them.
My question is: how to stop using the images? I've tried to dispose the form that loads the .zip file, but with no success.
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Nov 21, 2011
I'm trying to Export a RDLC report into a PDF file and email it as an attachment with the click of a button.
My issue is that I get A required privilege is not held by the client error in the following code.
On this line Dim fs As New FileStream("C:\TEST", FileMode.Create)
I Have Administrator Privileged on a Vista Machine.
Dim warnings As Warning() = Nothing
Dim streamids As String() = Nothing
Dim mimeType As String = Nothing
[Code]....
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Feb 2, 2010
I know how to send keys using Sendkeys.Send("{RIGHT}") I even know how to use Send keys In a timer, to repeat the key press... But it's just a key press, and it lets the key up. So If I tried to put sendkeys.send("{RIGHT}") under a Timer, then it will press/release the Right Key. I don't want that. I want to HOLD THE KEY DOWN. Here's Some Code, that I know how to do that Simulates a Mouse Click, Left Down, AND Left Up. Mouse Click. Ok...? So here's some example code of how to Send a simulated Mouse Click.
EXTREMELY EASY, BUT EXTREMELY POWERFUL CODE. Simulated Mouse Clicking.
Public Class Form1
'To allow to detect keyPresses. latter on in your code.
Private Declare Function GetAsyncKeyState Lib "user32" (ByVal vKey As Long) As Integer
[code]....
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Oct 13, 2011
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Feb 8, 2012
I have a number of files that are generated in a function defined as:[code]These files are immediately printed and the files are automatically saved to a directory; the files themselves are not for use by the actual software users. I timestamp the files to keep them uniquely identified for auditing purposes.I've now received a requirement to email some of these files externally to the company, and someone has complained that the current filenames are not user-friendly.So, I tried copying the generated file to a temp directory, with a friendlier name, emailing the friendlier file, then deleting it, leaving my audit trail intact, like so: [code]This throws a System.IO.IOException on the line System. IO.File. Delete (friendly FilePath) because the file is still in use, after it has been emailed.I've taken out the email code, which makes the copying and deleting work fine, so it's apparently attaching the file to the email which causes the problem.I've also tried breakpointing before the delete line, waiting five minutes, confirming the email has been sent, then advancing the code, but the same exception is still thrown.
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Feb 24, 2009
I'm trying to make a database program in VB 2008 and have come across a problem with a query that I'm not sure how to solve. I have a combo box which contains names of teams that are held within the database, when a team name is selected I have 4 queries that will separate players (in that team) by their position, using this information I will then be able to display information about the players in a collection objects so that it can be edited and what not.
My problem is that I need to be able to refer to the records in the query so that I can assign a players details to objects on the form, I've used a piece of code to do so that I used previously to select individual records from a table, however when I click on a team in the combo box it throws up the error: "Could not format node 'ClientQuery' for execution as SQL.". Not being a particularly experienced VB programmer this error doesn't exactly mean too much to me, although I am not exactly sure of another way to tackle the problem.
The code for this query is:
Dim GK(3, 2) As String
Dim c As Integer = 0
For Each Record In GoalkeeperQuery
[CODE]...
All the fields in the query are strings. If this is not enough information I can post the query I used to select the records in the query used above or anything else that's related.
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I assign an object to a variable in the MouseDown event and track it's relative position by examining the MouseMove event of the neighbouring panels as I drag the mouse over them.[code]...
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I have a picturebox set to move when the arrow keys are pressed. How do I prevent it from continously moving if the arrow key is HELD DOWN. I want to make it so the user has to press the key each time manually to move the picturebox.
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