Forms :: Get The Key Char On Key Down Event Of Textbox?
Mar 23, 2009
On the KeyDown event of the textbox, i need to capture the character pressed and send it to a function which fires a sql query for this character.To get the character i am using Convert.ToChar(e.keycode).However Convert.Tochar converts the keycode to char according to its ASCII value , thus F4 gets converted to "s" as "s" has ASCII keycode of 115.Is there some other way to convert the keycode to character which won't make these wrong conversions as even if i restrict the functions keys there may be problem with other key conversion also.
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Jan 28, 2010
I got a Sub which processes a code, and then it does whatever the code said. Example.
Code = "Black" -> Turns screen black.
Code = "OFF" -> Turns off the PC.
And so on.
If I call that Sub from Immediate console, It works perfectly. But if that Sub is called from an event, It does nothing, and usually throws an Exception. I read somewhere that I can fix this by using Threads, but I don't understand how that can help and make it work.
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Apr 5, 2005
i know this has to be simple but i can find anything anywhere tonight on how to check if while a textbox has focus if the ctrl+v or ctrl+c was pressed i simply need to use it like such:[code]
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Apr 30, 2009
So I am playing around with the resize event. My form is 500 wide, my button.left is at 100. If I use:
Dim int As Double
int = button1.Left / Me.Width ' this = 0.2
'resize event
'Button1.Left = (int * Me.Width)
TextBox1.Text = (int * Me.Width).ToString
The number in the texbox is correct - proportion wise, but it won't set the button1.Left to this number. I'm sure this is because int is a Double where .Left is an integer?
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Jan 27, 2012
OK, so my project is like this:The user selects a folder from their computer that holds a list of subfolders. The program then dynamically inserts a check boxes per subfolder within a seperate cell of a Table Layout Panel.I want to and a simple Click event to each checkbox control so that when a control is clicked, it counts all of the check boxes on the form that are checked.How do I go about adding the event handler to the checkboxes when they are created. Here is the code that adds the checkboxes:
Dim iCol As Integer = 1
Dim objFolder As Object = Nothing
For j = 0 To rCount - 1 '0 to dynamic number of rows
[code].....
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Aug 13, 2010
I have several multi-line textboxes that I want to lose focus (i.e. when the user presses the right arrow key) but the control wil not relinquish the focus.Simply put, I first verify if the selection start is at the end of the text, if it is, and the user presses the arrow key, it should move to the next textbox. some debug.print code placed in strategic locations indicates that the target textbox gets focus and immediately loses it and the source textbox gains focus once again. Essentially not allowing the textbox to lose focus.
Select Case
Case Keys.Right
tbRight.Focus()
[code]....
After changing the source textbox multi-line property to false, it behaves as expected. Is this a "feature" .. surely I don't have to resort to "SendKeys"
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Jul 11, 2010
and what would be the method for If 'char pressed = "a" then do something end if
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Jun 30, 2009
How I can clear last char in textbox in c# when I press key like D0 (mean when I press D0 clear 0 in my textbox)? Or don't let me enter 0? You know I don't want user cant enter number in textbox .
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Aug 31, 2011
How to not accpet string in textbox only numbers will be validate..for the textbox contact no. and ge..
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Apr 11, 2011
May I know instead of using WriteLine(MyTextBox.Text) to send data to a serial port, how do I send character by character? Use BaseStream.Write?
Now:
Dim ComLine As Ports.SerialPort
ComLine.WriteLine(MyTextBox.Text)
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Dec 16, 2008
i want to read a character 1 by 1 from a string and a .txt, i know all about stream reader so for the .txt would it be somthing like:textbox1.text = tr.readCharacter.i would prefer to be able to read from a textbox or String array though.
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Mar 30, 2012
I need validation for string to comply with next: no space char starts with one delimiter char ends with one delimiter char has no other char as delimiter char. Updated sorry missed that should only be one delimiter char at start and at the end
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Jan 28, 2009
I 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?
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Sep 30, 2010
Public Shared Function UrlTokenDecode(ByVal input As String) As Byte()
If (input Is Nothing) Then
Throw New ArgumentNullException("input")[code].....
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May 19, 2009
i am trying to increment a char in vb.net, eg: Dim letter As Char = "a"c. and i want to make it b, and so on. how can i do this?
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Aug 16, 2010
In VB6 we had a code inside textBox_MouseUp to call textBox_KeyUp(-1, 0) and the signature of KeyUp was
Private Sub textBox_KeyUp(ByRef KeyCode As Short, ByRef Shift As Short) Handles textBox.KeyUp
Now when I migrate to .NET I changed the KeyUp event to Private Sub textBox_KeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles textBox.KeyUp
How can I do this call textBox_KeyUp(-1,0) now from textBox_MouseUp event?
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Jan 20, 2010
ApplicationExit Event and Cancel event in app with no forms?
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Nov 24, 2010
I have two forms: main and sub
I need to access the even procedures like textchanged,lostfoucs,changeindex of sub form so that it can be used in main form all controls placed in sub form are included in main form and hold same name and values as of sub form how should i call it from main form to access all procedure of sub form
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Mar 22, 2012
I have split a string into a char array, now i need to copy the char array to an int array with the ASCII values of each char.Donīt know how to do it without looping each value.
This is my code:
origen = RichTextBox1.Text.ToString
Dim valor As Char() = origen.ToCharArray
Dim numeros As Integer() = (How can i convert "valor" to an int array?????)
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Dec 13, 2011
how can I detect if press Enter in the Textbox Change event and not in Textbox Keypress?
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Jun 5, 2009
i have found [char] specified in some of the examples at msdn , what is the difference between char and [char]
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Jul 6, 2011
I have a form where a number of textboxes are programmatically created within a flowLayoutPanel and named by adding together 2 strings.
With the click of another button i hope to have all the values entered into these text boxes stored in a text file. However, i cant seem to find a way to add strings together to allow me to retrieve the values entered within the text boxes created.
Below is the code i have so far: BTW FLP is my flow layout panel and c is my calculated nmber of textboxes that are created.
Private Sub createTB(ByVal c As Integer)
Dim x1 As Integer = 1
Dim y As Integer = 2
[Code]....
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Oct 4, 2011
"TEXTBOX is not a member of SYSTEM.WINDOWS.FORMS.TEXTBOX"
Why it is that the text boxes have errors like this even they are in the tax forms..
Label13.Text = sss.Text - philhealth.Text - pagibig.Text
Label18.Text = semiSalary.Text - Label13.Text
[CODE]...
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Jul 28, 2010
I use the code
Dim Selvk As New Selvkost2
Selvk.PassedText = TextBox29.Text
Selvk.Show()
[code]....
in my second form and the text passes. but I need to pass values from 20 textboxes. do I have to copy the code in my second form 20 times an declare passedtext2 and so on or is there an easier way to do this?
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Jun 18, 2010
I am creatting an windows application software in which many controls like Buttons, textBox, combobox are remain same in 12 different form. In this 12 diff form the activity of those controls will remain same.The scenareo id
1. I have 12 forms.
2. Each form containing 3 labels (Country, State, City). These labels indicates 3 combobox from which we can select location.
3. Now I need to use these 3 controls in all 12 forms with same activity.
4. When I change forms to another, these buttons shud remain same.
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Jan 3, 2011
I will try to explain what i want to do.I have make 3 textbox in form1 And i have a form2 where i have a Textbox ( Multiline )What i want i want to have the text from the 3 textbox to my textbox in form2.
textboxt1.text = tennis
textboxt2.text = boys
textboxt3.text = 01-01-2011
[Code]...
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Feb 16, 2010
I have combo box selectedIndexChanged events going on but I cant figure out how to get the value out of them so that when i hit the btn_ProjSal that the new salaries show up in the 3 labels. Here is my code. Doing it straight from the selectedIndexChanged event this works..but to get the button to pull the new values from each of those events is my issue.
Public Class Form1
Dim _emp101Sal As Decimal = 10000.0
Dim _emp102Sal As Decimal = 11500.0
[code]....
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Feb 24, 2010
how to use transaction rollback if oops concept is follow . all function(i.e to insert or update function is written in class ) so how to use transaction in button event .
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May 12, 2008
I need to produce a list of checked entries from a CheckedListBox whenever an item changes, but that ItemCheck event gets thrown before the item's status is actually changed so the checked items list is incorrect.I found a forum post telling to use the SelectedIndexChanged event instead, but that won't work if the user checks the item using the space bar.My two alternatives are to :1. Use the ItemCheckEventArgs to figure out what item changed and how. Since the code that gets the list of checked items is a few methods down on the calls hierachy, I would need to pass the event args around (or more likely an homemade representation of its data for consistency).
2. Use a class member boolean to see if I'm in the ItemCheck event handler and set the item's checked state to its correct value before calling the method that does the processing. The boolean is used to avoid an infinite call of the event handler, it would just return without any processing in the case the event handler is in the call stack itself.
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Nov 17, 2010
I'm pretty sure i'm not doing this right but i hope by asking this someone can show me the right path.I've created a function that creates a label and 7 checkboxes arrays . So depending how many names i get from my database, it creates that many for the label and the other checkboxes.
Now my function is inside a module which i call in my Class Form during "Load".
So what i want to do is be able to code in an event where the user checks on one of these
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