Force Uppercase

Question

I have a textbox into which data is keyed.
I want to be able to have the keys entered set to upper case before they appear in the textbox.

I dont want the user to have to use the shift key. how can i do this?

Can i do something inside the KeyDown or KeyPressed event that will convert them to uppercase

Answer 1

Add this code to the KeyPress event:

if (char.IsLower(e.KeyChar)) {     e.KeyChar = char.ToUpper(e.KeyChar); }

Answer 2

I have tried this, however it says the KeyChar is ReadOnly

Private Sub txtBTAddr1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtBTAddr1.KeyPress         If Char.IsLower(e.KeyChar) Then             e.KeyChar = Char.ToUpper(e.KeyChar)         End If     End Sub

Answer 3

I've tried it on a regular WinForms app, in VS2005.

I don't know, it might be a CF or a version problem...

Answer 4

Found a solution

Add the following code into the textbox's keyup event

txtBTAddr1.Text = txtBTAddr1.Text.ToUpper txtBTAddr1.Select(txtBTAddr1.Text.Length, 0)

Answer 5

Not a good solution...

You're converting all the text to upper case. This makes caracter insertion impossible. The cursor won't move....

Keychar shound't be read-only!!!!

Answer 6

hello Barry,

Maybe you could use the OpenNETCF.Windows.Forms.TextBox2 control.
It has a property that configures the character casing that should be used:

textBox.CharacterCasing = CharacterCasing.Upper;

Greetings,

Peter Vrenken

Answer 7

or you could just make whatever the user types in, to uppercase after they press a continue button or something.

Dim theString as string = Me.theTextBox.Text.ToUpper()

Answer 8

Add the below code in a css file and add it to your project. Apply this css to the control say a textbox like :
<asp:TextBox ID="txtSurname" CssClass="TextBoxUpperCase" runat="server" ><asp:TextBox>

---

.TextBoxUpperCase
{
text-transform: uppercase;
color: black;
}

---

This will convert the case to upper as you type in the control.

Cheers!

Answer 9

e.KeyChar is readonly as passed from the base control.  The following works in VB.NET:

 

If Char.IsLower(e.KeyChar) Then

    e.Handled = True

    SendKeys.Send(Char.ToUpper(e.KeyChar))

End If

Answer 10

This works sucessfuly..

Rupesh Kumar Friday, March 02, 2007 3:10 PM

0 votesVote As Helpful

Add the below code in a css file and add it to your project. Apply this css to the control say a textbox like :
<asp:TextBox ID="txtSurname" CssClass="TextBoxUpperCase" runat="server" ><asp:TextBox>

 

---

.TextBoxUpperCase
{
text-transform: uppercase;
color: black;
}

---

This will convert the case to upper as you type in the control.

 

Cheers!



thks lot!!

Answer 11

Thank for  valuable information..

great man

Answer 12

I think this is the easiest way: 

Title Make a TextBox convert letters to upper case in VB.NET Description This example shows how to make a TextBox convert letters to upper case in VB.NET by setting the control's CharacterCasing property. Keywords TextBox, lower case, VB.NET Categories Controls, VB.NET

When the form loads, it sets the TextBox's CharacterCasing property to Upper.

Private Sub Form1_Load(ByVal sender As System.Object, ByVal _ e As System.EventArgs) Handles MyBase.Load ' Set the TextBox's character casing. TextBox2.CharacterCasing = CharacterCasing.Upper End Sub

http://www.vb-helper.com/howto_net_uppercase.html

Answer 13

I know this thread is out dated but I am writing this just to help if anyone struck up with the same issue.

Yes,We can handle it in KeyPressEvent.I was facing same issue and it fixed it as below.

1. Created a Custom contol and overridden the keypress event.

Below is the code snippet.

public partial class myTextBox : TextBox

{

public myTextBox ()

{

InitializeComponent();

}

protected override void OnKeyPress(KeyPressEventArgs e)

{

int start = SelectionStart;

if (SelectionLength > 0)

SelectedText =

string.Empty;

if (Text.Length == MaxLength)

{

e.Handled =

true;

}

else

{

if (char.IsLower(e.KeyChar))

{

Text = Text.Insert(start,

char.ToUpper(e.KeyChar).ToString());

SelectionStart = start + 1;

e.Handled =

true;

}

base.OnKeyPress(e);

}

}

}