KeyPress To Trap A Decimal Or Period?
Nov 8, 2009
I am trying to prevent the user from typing dupilicate decimals or periods into a data entry form. The code below has all been tried and yes, there was a do something in there. This is just a sample of what I tried. When I could not trap "." I moved through various renditions of the e.keyvalue still no luck. I know it is simple and stupid but it darn sure escapes me...
If e.KeyValue = 110 Then 'NUMPAD DECIMAL
If Me.MultiplierTextBox.Text = "." Then
End If
[Code]....
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Feb 18, 2009
I'm working on an app and in the textbox field I would like to be able to convert anytime a user would type .36 it would actually change and display 0.36, mainly I want it on the key press of the period just add a zero before it, and I need this to happen on the keydown event.. anyone have any ideas for me on how to do this? This is all I know so far...[code] One last smidget of problem too, I only want this to happen when the user types . in the beginning not if he types 4.22 with the period being after a digit.
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Sep 29, 2010
My chemistry calculations program, written in Visual Studio 2008, VB.Net (Win XP), gives completely wrong results when a Comma is used as Decimal Symbol.The calculations are only correct with a Dot (.) as Decimal Symbol.How can I make the calculation results independent of the Decimal Symbol? (Dot or Comma)?(For example Excel calculates correctly with a Dot or Comma as Decimal Symbol)I have found an old thread adressing the same problem, but no simple and easy solution was given.
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Sep 9, 2009
I was wondering how can I get the two numbers right of the decimal period? If I had 2.85874125639, I would want to get this: 2.86 since it was rounded...
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Jul 1, 2011
In VB.Net, is there a way of auto-detecting the culture of a string representation of a number? I'll explain the situation:Our asp.net web site receives xml data feeds for boat data. Most of the time, the number format for the prices use either a simple non-formatted integer e.g. "999000". That's easy for us to process.Occaisionally, there are commas for thousands separators and periods for the decimal point. Also, that's fine as our data import understands this. Example "999,000.00".We're starting to get some data from France where some of the prices have been entered with the periods and thousands separators the other way around as that's the way it's done in many European countries. E.g. "999.000,00". This is where our system would interpret that as nine hundred and ninety nine pounds instead of the nine hundred and ninety nine thousand pounds that was intended.
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Jan 18, 2011
i am using the following logic to capture the keypress event in a dataGridView so that I can edit numeric cells but cannot capture decimal value in my code i cannot pass the digit.
[Code]...
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Jun 27, 2012
What is the cleanest, most readable way to String.Format a decimal with the following criteria
start with a sign symbol (+ or -)
a fixed number of fraction digits
no decimal separator
right aligned
pre-padded with "0"'s
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Dec 20, 2010
how do you convert a decimal ( decimal place holder = dot) to a decimal (decimal place holder =comma)?
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Oct 19, 2010
OdbcDataReader in showing decimal fields Decimal separator disappear with DB2 dsn
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Aug 27, 2009
After converting all degrees-->decimal, and decimal-->hours, how can i use Tan, Cos and Sin formula in vb.net? I want the user must enter an input (which it is a coordinat-->i already convert the degrees-->decimal value as suggested by stanav and paul.
The questions like this (i only calculate on paper but dont know how to implement in code):
Input user need to enter:
-latitude local (e.g. 1.4875)
-longitude local (e.g. 103.3883333)
[CODE]...
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Jan 17, 2011
My user requests to change the . on the numpad to a when entering text in a multiline textbox.So I was thinking about the KeyDown event.To determine if the numpad . was pressed I can do something like this [code]But now how do I change the returned charachter as a , ? All e.Key... properties are ReadOnly. The KeyPress events let me change this by providing e.KeyChar, but in that event I can't check for the numpad .
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Apr 17, 2010
How would I go about rounding up decimal numbers to the nearest 2 decimal places? For example $7.0000032 would be $7.01 In theory, VB would make it $7.00 but if it is > $7.00, I want it to reflect that to the nearest penny... so $3.0000001 would be $3.01
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Jan 27, 2010
'pressing F1 key on main form. I dont know how to trap whether user pressed F1 key or not
Private Sub frmMain_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
Dim KeyAscii As Long = Asc(e.KeyChar)
[code]....
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Mar 16, 2010
I'm using Vs2008 and I have a combox in a Windows form.I woud like to know how I can capture the tab key after the user has select an item in the combobox.
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Mar 30, 2011
If I have the code:Dim x as Decimal = 100.0m
Is it casting from a double to a decimal implicitly. How would I do this explicitly in vb.net?
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Dec 21, 2010
1) One Decimal Varibale stores a decimal value
2) The value must be converted in string ( some time the comma is used as decimalplaceholder some time the dot)
3) the user modifies the value
4) i need to riconvert the string back in decimal
how can i do this
so:
Variable 123.34D ----> textBox 123,34 or 123.34 -----> variable 123.34D
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Aug 26, 2006
The fileupload control works well for files < 4MB (maxrequestlength), but if the file is larger than this the program fails with: - Server error in '/xxxxx' application Maximum request length exceededHow do I trap this so that I can return a better error message? The failure occurs before the Page Load from any callback, so I can't see any way of trapping the error, and I haven't seen any event or property of the Fileupload control that I can set to say "Do this when Max Request Length is exceeded"
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Dec 8, 2009
Does anyone know how to trap f.i. the SelectedIndexChanged event in order to read the SelectedValue from the ComboBoxColumn?
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Dec 7, 2009
With the component I am using, I only have a keypress event. So I cannot seem to figure out how to trap the control key. The lower case z is reported as keyascii 90 and the upper Z is 122 but can't get the control to show me when debugging. This is where I'm at (trying different ways, none working) Can someone tell me how to trap a ctrl-z correctly with this keypressevent?
[Code]...
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Apr 22, 2010
I have the problem in VBA for Access, but I assume that it is related to Visual Basic as a whole as well.
[Code]...
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May 16, 2012
I have the problem in VBA for Access, but I assume that it is related to Visual Basic as a whole as well.I have the following code:
public sub NavigateIE
dim ieobj as shdocvw.internetexplorer
ieob.navigate ("Some URL")
end sub
[code]....
How can I link the DocumentComplete event of ieobj to the subroutine named customeventforieobj?
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Apr 14, 2011
Are there any way to trap key when the DateTimePicker is dropdowned?
I have tryed many ways but no effect.
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Oct 2, 2009
I need to create a monitoring mechanism using SNMP (in .Net). I think we'll be using an nsoftware component to handle most of the work. It appears we must use 'traps' to communicate from the agent to the server. We'll have a number of different traps and various information detailing each trap. What is the best way to implement custom traps? That is, what is the best way to not only send a trap, but also send the information describing the trap to our 'snmp manager'? I think this is done through "variable bindings". To use "variable bindings" do we need to create our own "enterprise number" and use an "enterpriseSpecific" trap? Should we implement our own, custom MIBs or can we just send the data we need with the trap (via variable bindings)?
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Jul 30, 2009
I have the an ASCII message of SNMP traps, how can i sent it to different IP address? i dont want to use email instead. Given a IP address and the port, of that receiver machine. tell me the solution or where can i get references to the command at least. coz i could find anything regarding it.
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Sep 11, 2009
How do i trap a connection string that is disconnected?
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Jul 1, 2009
In my Timer codes[code]...
How can I add this statement or condition?
If the Response is > 1, my timer will tick and go to next item in listbox (means successful).[code]...
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May 9, 2012
I am trying to build a socket program and I need your help.The program is to be used for Scales.I need to trap the data from the scales and then update the DB.
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Feb 4, 2012
review the following code; it is not able to trap the error and the code errors out (OleDbException was unhandled) on the code marked with *
Private sub SaveEmployee()
Try
gConn = New OleDbConnection(sConn)
[Code].....
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May 19, 2009
I am using VS 2008. I have a listview control whitch 'checkboxes' property enabled.My question is: how can I trap a MouseMove event over an item only, excluding the associated checkbox?I have the following code in MouseMove event of the ListView control but it cannot differentiate between an 'item' and a 'checkbox:
Private Sub mylstview_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles mylstview.MouseMove
Dim oListViewItem As ListViewItem[code]....
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Apr 8, 2011
I have a SqlDataReader and I want to trap any exceptions with Try Catch Finally if the reader =cmd.ExecuteReader() statement fails. If this statement throws an exception do I need to close the reader? If so, where. Wherever I place the reader.close() statement I get an error that the reader has not been assigned a value yet.
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