C# - Format Numeric Value From Textbox As Percent
May 11, 2009I have a numeric value in a Textbox that I'd like to format as a percent. How can I do this in C# or VB.NET?
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Numeric Textbox Class - Number Format Info Not Defined
Jun 22, 2010This is a Library code I got from Microsoft for format a textbox into a numeric format...but it's doesn't works because error message "numberFormatInfo is not defined".
Public Class NumericTextBox
Inherits TextBox
Private SpaceOK As Boolean = False
' Restricts the entry of characters to digits (including hex),
' the negative sign, the e decimal point, and editing keystrokes (backspace).
[Code] .....
Format String Value As Percent On DataRow
Feb 24, 2012I've been at this for an hour, but I can't seem to format a string as a percent while I am looping through a datatable. The string value that is being passed in is "3.22"
Public Function securityDt() As DataTable
Dim secMasterDt As New clsDataSecurity
Dim dt As New DataTable
dt = secMasterDt.getSecurityMasters()
For Each row As DataRow In dt.Rows
[Code] .....
Double.Parse % Percent - Input String Was Not In A Correct Format
Jan 19, 2010I have a DGV with a column bound to a Double. When I enter "1%" I get:
System.FormatException: Input string was not in a correct format.
I then try: MsgBox(System.Double.Parse("1%")) and get essentially the same error. (same for "$")
Is there a setting that will allow "$" & "%" as not only valid Double input but also do the correct adjustment for "%"?
Format A Variable To Numeric Characters?
May 20, 2009how do i format a variable at runtime.
Here is my code
string cool = // some numeric value e.g. 500000
Label2.Text = " Payment of £ " + cool ;
[code].....
VS 2008 Numeric Input Format?
Aug 25, 2009Is it possible that a user input to a textbox like '12500', but vb shows it
'12,500' at the time of input.
But at the saving time vb should to read the '12,500' as '12500'.
Convert Numeric String To Date In Format Dd.MM.yyyy?
Dec 17, 2009I need to convert numeric string to date in format dd.MM.yyyy :(
View 2 RepliesFormat A Numeric Column In A Datatable That Is Queried From SQL Server?
Oct 26, 2011I have a datatable that is queried from SQL Server database, and it has a numeric column and I want to format it to "###,##0" format for readability reason. I tried:[code].....
View 2 RepliesTextBox Validation - 16 Numeric Digits Entered Into The Masked Textbox
Nov 18, 2009I am trying to mkae sure that there has been 16 numeric digits entered into the masked textbox. If not show errror message and if so to call the fucnction ValidateLuhn. When calling Validate Luhn i want the program to tell me if the number entered is valid or invalid using the code in the function:
Private Function ValidateLuhn(ByVal value As String) As Boolean
Dim CheckSum As Integer = 0
Dim DoubleFlag As Boolean = (value.Length Mod 2 = 0)
[CODE]...
C# - Why Textbox Id Not Allowing To Start With Numeric In Asp.net
Sep 7, 2010I have to give textbox control id like below
<asp:TextBox ID="7_1" runat="server">
It is not allowing me. If I give
<asp:TextBox ID="Test7_1" runat="server">
Then it works fine. Why? Why can not give start with numbers?
Creating Numeric Textbox (.Net 4.0 - Winforms)
May 12, 2012I'm trying to create my own numeric textbox that will handle decimal as well as whole number values. The concept is, unlike the regular textbox, this one will accept a value of 'Double' data type and show it with proper formatting e.g. Leading Digits, Digit Grouping etc. When the textbox value is called, it returns the actual 'Double' data type value. The entire thing is done through the 'Text' property; wherein the regular 'Text' property is shadowed and one with 'Double' data type is used.
[Code]...
Creating Numeric Textbox (.Net 4.0 - Winforms)?
May 12, 2012I'm trying to create my own numeric textbox that will handle decimal as well as whole number values. The concept is, unlike the regular textbox, this one will accept a value of 'Double' data type and show it with proper formatting e.g. Leading Digits, Digit Grouping etc. When the textbox value is called, it returns the actual 'Double' data type value. The entire thing is done through the 'Text' property; wherein the regular 'Text' property is shadowed and one with 'Double' data type is used.The problem is, in the designer properties window, the Text property always remains readonly and its value says 'Object reference not set to an instance of an object'. What's my mistake?
My code follows:
Code:
Imports System.Windows.Forms
Imports System.ComponentModel
Imports System.Runtime.InteropServices
[code]....
Filter Textbox Input To Numeric Only?
Jun 2, 2009How do I suppress all data except numeric?
This is not working on KeyDown():
If e.KeyData < Keys.D0 Or e.KeyData > Keys.D9 Then
e.Handled = True
End If
Make A Textbox To Enter Only Numeric Value?
Mar 9, 2009Is any easy method to set a textbox poperty which allow only numeric value without occur any events...?like setting to textbox property?
View 11 RepliesMaking All Textbox Input Numeric Only
Jun 9, 2011I have a function in my textbox1 with the got focus event. I have a 40 textbox in my goupbox1.[code]I want that when the textbox1 gotFocus, all my textbox in groupbox1 under the for loop event will declare that only numbers are allowed to be entered in all the textbox. I manage to work with it but only in a single textbox. Here is my code for it.[code]Is there a way or would it be posibble to put this code # 2 into the code # 1? So that I don't have to declare 40 TEXTBOX which is not good.
View 5 RepliesTextbox To Allow Only Alphabet (no Numeric Character)
Apr 23, 2012I want all my textbox in a form to allow only alphabets,no other characters.I can do this with only one textbox at a time.Is there a way to do it for 10 textbox at a time.[code]
View 6 RepliesValidate Textbox Allows Only Numeric And Decimal?
Aug 31, 2010it should take either decimal values or integers and max length is 16if it takes decimal value as input then it should contain only 14 digits in decimal place and 2 digits in fraction part eg(1234567.12-valid) but (12345678.123 - invalid) and also(123456.12345- invalid)
View 2 RepliesInsert Null Value From A Textbox At Numeric Field?
May 17, 2012Why when I try to save a null value from textbox at sql server 0 is saved?
View 2 RepliesNumeric Textbox Validation In VB 2010 (Windows 7)?
Jul 21, 2011I simply want to have a user enter a number, e.g., 3.5, into a textbox and then click a button to process it. If nothing or a char or string is entered, I want to inform them to enter the number and clear the box. From a suggestion somewhere it was said to simply use validating. I thought e.handled was correct by that doesn't show up as an option. It works if the input is a number. If not, the messagebox shows and closes on OK but I can't do anything else. Any click (even to 'X' the window) anywhere brings up the messagebox. This is basically what I've tried:
Private Sub txtKidsAnswer_Validating(ByVal
sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles txtOddsAnswer.Validating
If IsNumeric(txtKidsAnswer.Text)
[code]....
Setting A Textbox To Only Accept Numeric Values?
Dec 9, 2010I am looking into data validation as I need a way of setting a textbox to only accept numeric values. I have had a search for this and it doesn't seem as straight forward as I had hoped.
I have found a couple of possible methods, although the sites which I found them where very unclear on how they actually work. I feel strongly that I should know how all of my own programs work >_>
I have no actually got this to work with my program yet. Are there better methods than this?
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
Dim allowedChars As String = "0123456789$,"
[Code].....
Validating Textbox For Numeric And Alphanumeric Dynamically
Apr 2, 2009I have form with ComboBox and TextBox. ComboBox has values A, B. And I would like to validate TextBox. If user select A so TextBox need to check for numeric and amount of numbers can't exceed 10 characters. If will entered not numeric characters error will indicated. If user select B so TextBox will check for string and user can enter any characters. Only if box is empty error will indicated.
View 6 RepliesVS 2008 - Checking If A Textbox Is Numeric And 4 Numbers?
Sep 8, 2009best way to check if a textbox has only 4 numbers and isNumeric, for example i need to enter postcodes.I currently have:
If CDbl(txtPostcode.Text) <> 4 Or Not IsNumeric(txtPostcode) Then
MessageBox.Show("Postcode must be 4 Digits", "Error")
But the message box comes up regardless of whether there is 4 numbers, letters, or anything in the textbox. Its also used in the leave function of the textbox.
Validation Command - Update Datetime Textbox Instead Of Numeric
Aug 2, 2010I have the following validation which works fine for numeric textbox i.e., txtprojstart, however I want to update it for datetime textbox instead of numeric... See code below
[Code]...
VS 2008 - Textbox Validation For Numeric And Length (7 Characters)
Oct 20, 2009I validate TextBox for numeric and length no more then 7 characters. I'm checking for Not IsNumber and Len. But I want to give a user to save record when TextBox is blank.
View 12 RepliesVS 2008 Validates The Numeric And Decimal Input For A Textbox
Jun 3, 2010I found a function that validates the numberic and decimal input for a textbox and works exactly like I want. But it does not let me limit how many numbers after the decimal. how to do this in the same function?
[Code]...
.net - Setting Textbox So User Cannot Type In Non Numeric Characters Or Spaces?
Apr 19, 2012Is there a way to set a textbox in vb such that it does not accept a space or a non-numeric character entered by a user? I am writing a program that has a textbox called "phoneField" in which the user should type in only numbers and if the user trys to type a non-numeric character or space, nothing should be displayed in the textbox. How could that be done?
View 3 RepliesDetect Alphabetic Or Numeric Key In A Datagridview Control And Send Handled Key To A Textbox?
Feb 6, 2012I'm working on a Form that contains a datagridview and textbox, I need the datagridview detect any letter of the alphabet or numbers, then select the input and send the key pressed to input.
View 1 RepliesVS 2008 Verify A Textbox If Contains At Least One Numeric Digit And One Alpha Character Using Loop?
Mar 24, 2010How would you verify a textbox if contains at least one numeric digit and one alpha character using loop?
View 3 RepliesIs There A Numeric Text Box Not An Up-down Box A SIMPLE Numeric Box Into Which The User Can Place A Number
Apr 6, 2012Is there a numeric text box, not an up-down box, a SIMPLE numeric box into which the user can place a number, 5 boxes actually, then on command have the five boxes added and the sum displayed?
View 8 RepliesVS 2005 Date Format - Insert Date In Dd/mm/yy Format In Sql Table From A Textbox
Apr 26, 2010i am trying to insert date in dd/mm/yy format in sql table from a textbox but everytime the default date 01/01/00 goes in table.
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