Isnumeric Cannot Recognize Percentage String As Number?
Feb 16, 2012
I have some customized string formats of double values. I need to convert these strings to double values at some point (Note that these strings may contain error messages other than numbers). So I first check if these strings are numbers, and if yes, then convert them to double. Isnumeric works for my first customized string format. But I found that is numeric cannot recognize percentage strings. I wonder why isnumeric understands () but cannot understand %. And what is the better way to convert "(100.00)" and "50%" to doubles other than Cdbl?
[Code]...
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Aug 2, 2009
I currently have this line of code which has been working for the past 6 months:
If IsNumeric(txtProductID.Text) Then
...do stuff
Else
Dim msg As String = "Error!"
End If
All of the sudden, no matter what kind of entry is put in txtProductID (including plain numbers), it fails! Is there reason for me to be going crazy over this?
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Aug 4, 2010
I want to change the IsNumeric to string in the code below but IsString gives an error how can i go round it Private Sub txtprojtypenw_Validating(ByVal sender As Object, ByVal e As
[Code]...
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Aug 15, 2011
I have a fixed percentage 0.3% I need to multiply this by a number of months which varies 1 to 12
Having done this I need to add the percentage to a pre-determined number
so as an example
£300 + (0.3 * 10)
I can get the 3% (0.3 * 10)
But when I add this to the existing number (£300) it equals £303 not £309 which is what it should equal.
Can anyone advise the way of adding a percentage as appose to just another number? This also need to allow for -percentages i.e. -3%
The equation I am using is below and I appreciate there is nothing to set decTotalPercentage as an actual percentage but that's because I am stumped...
decTotalPercentage = decPercentage * intMonths
decFinalPercentage = decMoney + decTotalPercentage
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Feb 12, 2011
I have data coming in to my serial port, which is just a 6 digit number.
textbox1.text = serialport1.readline()
In the textbox_text_changed sub. I need to do something with this number, but only if it has changed by more than 2%. I need the 2% as the number coming in is fluctuating a little bit so I don't want anything triggered if it's less than 2%.
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Feb 3, 2010
I want to know how to convert a percentage rate such as 4.5% into a decimal number in your code editor in V 2008.For example, the user input is 4.5%. Is there any function available to convert is to 0.045?
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Mar 27, 2011
Let's say that my string is: "c: est" where "test" is a folder. How do I tell my app that it is a folder?
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Jan 29, 2012
[URL] That way if the string that is not recognised that is passed to Color.FromName it returns a SolidColor of
Color.Black = Color.FromARGB(255,0,0,0)
That way, Forms and controls that only support SolidColors are supported.Installing VB6 on Windows 7?
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Jan 31, 2009
I created a listbox using VB.NET. When the user select an item (it is a string format) in the listbox and click on a button, there will be a number beside the string and the number will increment which time the button is clicked. Anyone know how to do it...?Below is the coding I'd done, but I don't know how to do the increment part. Anyone know what coding I need to add?
Dim no As Integer = 0
listBox.Items.Add(listBox.SelectedItem & no)
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Nov 17, 2009
What is the C# equivalent function of IsNumeric() in VB.. If possible include an example.
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Jul 21, 2011
I have a function in VB.NET that loops through values and attempts to convert it to a decimal if IsNumeric is True,
Dim Value As String
If IsNumeric(Value) = True Then
Rate = CType(Value, Decimal) <--- bombing here
End If
I've found that when the function receives the value 603E43 IsNumeric evaluates to True for some reason and then bombs on the conversion. Why would IsNumeric be true in this case?
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Jun 7, 2011
I have VS2005 and I'm trying to use a function like isNumeric, except it accepts an array of strings.
[Code]...
I keep getting errors, anybody know why? Might just be a stupid mistake, haha its been a long day today.
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Oct 14, 2011
Public Class Form1
Private Sub Button1cmdRun_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1cmdRun.Click
Dim hour As Integer
Dim minute As Integer
Dim second As Integer
[Code]...
Whenever I run the program and I enter text into the label the program crashes. When I type in a negative number the message box works. A number like -45 worked and a message show appeared, whilst a string like 'bob made the program crashed.
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Jan 3, 2012
When was isnumeric considered legacy code? I guess all that i have learned from my college class last semister is legacy.
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Apr 5, 2012
I'm working with visual studio 2008 developing software for windows CE 6.0, compact framework.I'm having this "strange?" trouble with isNumeric method. Is there another better way to do this job? Why is getting me an exception? (two in facts...both of type FormatException)
dim tmpStr as object = "Hello"
if isNumeric(tmpStr) then // EXCEPTIONs on this line
// It's a number
else
// it's a string
end if
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Nov 5, 2010
Following a recomendation from an expert, I removed the Microsoft.VisualBasic Reference from my project in order to "clean" the code and use only .NET. Almost anything I have been able to fix except I cant find the equivalent of IsNumeric or IsDate functions.
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Nov 25, 2011
I had a strange error in a VB6 app this morning and it all stems from the fact that IsNumeric is not working as I expected. To me this seems like a bug.
This code displays 4.15877E+62 in a message box:
Dim strMessage As String
strMessage = "0415877D57"
If IsNumeric(strMessage) Then
[Code]....
I am guessing that the runtime engine is incorrectly thinking that the D is in fact an E? I think this is a bug though as the exact same code in VB.NET outputs not numeric Is this a known issue with IsNumeric?
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Oct 11, 2009
On all my assignments I am asked to make sure the data is valid - only numeric, no empty strings. And I keep wondering which is the best to use IsNumeric or TryParse. When I try both on coding they seem to do the same thing, and I don't seem to find my answer online. Any ideas of why to use one over the other.
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Jun 11, 2012
Private Sub Bearing_Textbox_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Bearing_Textbox.KeyDown
If e.KeyCode = Keys.Enter Then
e.SuppressKeyPress = True
Call Plot()
[Code] .....
Which is used to plot bearings. The user inputs a bearing of 0-360 degrees. It works fine if a user say types in "abc" or "/" i.e. anything that isn't numeric. But if a user types in "90/" then it allows it. When the bearing is plotted the keypress is surpressed so the user cant then go back an edit. Is there a quick way to amend the code to allow for this?
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Jun 7, 2009
I'd like to convert a string which contains a decimal number into string that contains the binary value, the octal and the hexadecimal value of that decimal number.Afterwards I also like to convert a string containing a binary, octal and hexd. number into a decimal string.Basically I'm looking for the functions:
dec2bin
dec2oct
dec2hex
bin2dec
oct2dec
hex2dec
I'd not prefer to rewrite a function, I'm sure the framework must have these functions already.
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Aug 28, 2010
How can I do for converting 3 in "three". Or converting for example 153 in "one hundred fifthy tree"
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Oct 1, 2009
I am trying to get a number into a cell but as a string not a number. For example if I have the number as '12345678901234' instead of putting that exact number in it changes it to ' 1.23457E+13 '. How do I get it to read it as a string and not an integer? Here is the code that I am using.
Dim
num As String
If pRow.IsProjectNumNull = False Then
[Code].....
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Jul 15, 2009
How do I count the number of times that a string appears in another string. I know this code:
If odocument.ToString.Contains("window.alert") Then
pops = pops + 1
End If
But that will just see if the desired string contains "window.Alert" once, rather than how many times it does contain it.
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Mar 31, 2010
I have build a DLL with COM enabled. In this DLL I have classes that did use the functions CInt, CDec and IsNumeric. If I test these classes from a .NET application then it works ok. But when I called/run these classes from a Win32 application (with COM) then I did get an "E_UNEXPECTED(0x8000FFFF)" error.After some debugging I found out that the problem would go away if I:- replaced IsNumeric with Integer.TryParse or Decimal.TryParse- replaced CInt with Integer.Parse- replaced CDec with Decimal.Parsey.
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Dec 23, 2010
i am using this code below to compare two strings then count the no. of mistakes when text is added into textbox2[code]but when enter key is pressed the code doesn't recognize the enter even thought it is correct and counts it as a mistake.
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Jun 19, 2009
I have an data application I made for a company. I want them to be able to hit both the Tab and the Enter key to select the next control in the tab order. I would also like to turn the background of the currently selected control a color other then white. I have been trying for days to find a solution but trying to interpret the msdn library is making my head spin..For some reason, the below code only recognized the enter keyup and not the TAB key.My Code here:
Imports System.Windows.Forms
Public Class Form1
Private Sub TextBox1_KeyUp(ByVal sender As Object, ByVal e As
[code]......
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May 23, 2010
I am trying to get a percentage that just does not seem to work.I am using WMI to get the Total Physical memory of my system and then the Free Physical Memory. Then get the percentage.
2147483648 - Total Memory
838028 - Free memory
According to Task Manager my physical memory is 59%. This is the code I am using but I can not get 59% or 41% that is free.
temp = FM/TM
temp = temp * 100
percent = FM * temp
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Feb 23, 2009
How can I round a percentage off to the nearest whole number? [code]
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Feb 8, 2010
I would like to get number from a string eg: My123number gives 123Similarly varchar(32) gives 32 etc
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Aug 7, 2009
i 1 2 get number from string.
Ex: gsgfsg23sd ==> 23
sdfgdsf23dsf432 ==> 23432
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