So far I have code for a textbox that limits the value entered by a user to two value places. However, I would like to limit the value entered by a user to numerical values only. And to handle any exceptions that go along with it.
View 2 RepliesHow can i limit the user to input only one period in textbox cause in my textbox the user can input may periods on it??
View 3 RepliesI have a text box that I only want the user to enter A, B, C or D (it'll give an error msg if anything else is entered)
View 6 RepliesI've got a property MyEnumProp which is displayed in a property grid. The property is of type MyEnum. So all entries of MyEnum are available in the propertygrid to select.Now i have a second property and based on its value i want to limit the values available in the propertyGrid for MyEnumProp.Is there a way to accomplish this?For instance: The following 2 Enums are defined in an Interface:
Enum Country
England
France
[code].....
I'm trying to check whether values ar between a maximum and a minimum limit. I do that 21 times, and it works 20 times. In case of the 21. time VB tells me that 15 is less than 8. Here the relevant lines of
[Code]...
I'm trying to limit the number of decimal values to 3 in numbers such as .3125 but I also have numbers such as .5 which I need to leave as is.
how can I determine if a number is 4 decimal places and cut off the last number.. I don't want to round up either.. .3125 should be .312 not .313 and .5 should stay at .5 and not .500.
does textbox has a limit because I added a (very long) code and I couldn't paste further..What can I do make it bigger? I mean bigger of capacity.
View 4 Replieshow to calculate "InvTotalTextBox" and "InvDiscountTextBox" values then show the result in "InvNetTextBox"..?
how can i do..?
three TextBoxes in a form
InvTotalTextBox, InvDiscountTextBox and InvNetTextBox
InvTotalTextBox is Binding with Table Field "InvTotal"
[Code]....
I use this code to save some TextBox values to XML, but when I try to save some more, it overwrite the first one. What am I supposed to do in order to save more contacts?
Imports System
Imports System.Xml
Private Sub ProsthikiBTN3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ProsthikiBTN3.Click
Dim settings As New XmlWriterSettings()
settings.Indent = True
[Code] ......
I have a textbox called textbox1. I wanted to limit it to only two characters, so I added the code TextBox1.MaxLength() = 2, however this textbox is for user input and only want to allow numeral values 0-99. And if the user entered a non-numerical value an exception would occur so I need help on to handle that.
View 2 RepliesI have 5 textboxes named as txt1, txt2, txt3, txt4, txt4. Only numbers are allowed in these fields. I have another textbox named txtSubTotal which is calculated (SUM) from the values entered in the above five textboxes. What is the best way to calculate totals when numbers are entered or modified in any of the five textboxes?
View 2 RepliesI have a textbox called textbox1. I wanted to limit it to only two characters, so I added the code TextBox1.MaxLength() = 2, however this textbox is for user input and only want to allow numeral values 0-99. And if the user entered a non-numerical value an exception would occur
View 3 RepliesI wanted to set a maximum limit of characters of textbox in the properties but i can't find where it is located unlike in vb 6.0 you can set the characters in maxlength...
View 6 RepliesI have this textbox and i want to limit the number of digets able to be entered to 4.
View 4 Repliesi would like to limit a textbox input to 20 characters and only one line to input the characters.. i really have no idea where to start. i did see some forum threads, except they're for different options other than the option i need.. trujade.so much work to do and so many choices to choose from...
View 5 RepliesHow can I make a textbox in which can be only typed a number like 12.00 or 1231231.00 or 123123
I've done this in a very long way and I'm looking for the best and fastest way.
Also the decimal separator must be culture specific.:
Application.CurrentCulture.NumberFormat.NumberDecimalSeparator
I want to limit the Textbox to a range of characters in VB. For example, I want the user to enter strings from 5-7 characters. I know how to limit the Textbox to a certain number of characters by MaxLength but that will give him the option of writing just 3 or 4 characters which I don't want to allow that from happening.
View 4 RepliesI have a stored procedure (I cannot edit) that I am calling via linq.
The stored procedure returns values (more complex but important data below):
Customer Stock Item Date Price Priority Qty
--------------------------------------------------------
CUST1 TAP 01-04-2012 £30 30 1 - 30
CUST1 TAP 05-04-2012 £33 30 1 - 30
CUST1 TAP 01-04-2012 £29 20 31 - 99
CUST1 TAP 01-04-2012 £28 10 1 - 30
I am trying to limit this list to rows which have unique Dates and unique quantities in LINQ. I want to remove items with the HIGHER priority leaving rows with unique dates and qty's.
I have tried several group by's using Max and order by's but have not been able to get a result.
Is there any way to do this via linq?
EDIT:
Managed to convert brad-rem's answer into VB.net.
Syntax below if anyone needs it:
returnlist = (From p In returnlist
Order By p.Qty Ascending, p.Priority
Group By AllGrp = p.Date, p.Qty Into g = Group
Select g.First).ToList
I want to enumerate all of the values within a given registry subkey (for example 'HKLMSoftwareMicrosoftWindowsCurrentVersionRun')
View 4 RepliesI have a textbox and I would like to limit this textbox to enter 10 digits only. Is there a way to do it?
View 3 RepliesI want to limit length in textbox. not total maxlength but maxlength perline. for example. if I choose to limit 7 char per line. when words exceeded 7 in a line textbox will start a newline.(without break the word) can anyone tell how to make it? I did actually search for a long time.[code]although in text "For best results" s is the 8th char in first line.but it;s a word I dont want to break it
View 6 RepliesAlthough set textbox width can fit my request.but when writes textbox.text to a file it's actually in one line. for example"Scientists say our ability to focus is being undermined by bursts of information from e-mail and other interruptions. "
is actually one line text.but it shows 2 lines in my textbox. I want when it write to a .txt file it keep what is looks like in textbox. But it's actually one line in textbox. hope I make my question clear.
is there any method to do what I say? what I think is add a Environment.NewLine at each row end. or limit length in textbox. not total maxlength but maxlength perline. for example. if I choose to limit N char per line. when words exceeded N in a line textbox will start a newline.(without break the word) can anyone tell how to make it? I did actually search for a long time.. but I didn't find any useful information for my request.
How can we limit the textbox to input ONLY three numbers and three letters?
View 2 RepliesI trying to draw a bar chart based on the five values getting from the user via textbox...When i run this program no error is occured, but the chat is drawn...Can anyone please help me out in this regard.
here is the code i have so far
[code]...
I've a got a homework assignment that chooses one of four values in a list box, stores it in a text file. Secondly, on the display click event it should access the text file, read the line, store it in a variable and then display the totals in a text box. Works sort of fine except that it doesn't display the totals correctly. Code for both buttons is below. The variable are assigned in the mainform (Tried also in the display button and didn't change anything). The save button works fine and stores fine in the text file, it's just the reading that's the problem.
Private Sub saveButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles saveButton.Click
'save the new vote choices to a file
Dim votes As IO.StreamWriter
votes = IO.File.AppendText("votes.txt")
Dim voteSelected As String = CStr(commercialListBox.SelectedIndex)
[Code] .....
I want to control a textbox to only allow numbers, backspace and a certain length. Ive tried with the IsNumeric function but I cant seem to get it to work.
View 5 RepliesHow do I code in vb.net that the text box can only accept 10 inputs from the user. User can only enter 10 strings.
View 2 RepliesI am a new VB programmer and am using TextBox in VB2008. Here are the problems I experienced in TextBox -
1, After I typed number in TextBox and found I need to type another number. So I used backspace key to remove it. But at this time program quit and displayed this problem: InvalidCastException was unhandled. How to solve this issue?
2, Can anybody tell me how to set number of characters are allowed to be typed in TextBox?
3, Can anybody tell me how to implement the feature that only numbers are allowed to be typed? In case letters are typed, how to tell user to re-type?
Cause I just dont get whats going on here. I have a bunch of combo boxes linked to their own Tables in my database, 14 in total. My problem is that only 13 of them work and every one I add after 13 doesnt work for some reason.So I make a ComboBox, press the arrow in the upper right corner and click "Use Data Bound Items", Then I fill in the rest as it should be. But only the "Selected Value" function actually works. I can fill in data to my other tables manually through this ComboBox, but I can not view my Data Source! If I use the same ComboBox and use any other Table it works, but not anything past my 13th table. The BindingSource is there, so is the TableAdapter. If I preview a select quary to the database it works as it should. But for not in the ComboBox!
Its driving me mad, can someone explain to me what might be going on here?
I have a maskedtextbox that i want to limit character input in it but i can't manage to figure it out.The date type is "yyyy-mm-dd" and the mask is "1300/00/00" (it is not gregorian calender, it is persian )In the TextChanged event i am changing the bindingsource filter.Because of this i don't want the user enters invalid date. For example the user enters 9 in here : "1300/90/00" i want to prevent this from happening before TextChanged event occur. (the place isn't important i just want to stop user from entering an invalid month or day)I have tried the KeyPress event but i don't know how to detect where in the textbox user is entering a character.
Note that i know already how to validate and i have a code for that but the TypeValidationCompleted event occur when user does all changes and leave the textbox.