How to avoid space in textbox

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I have a TextBox..

<asp:TextBox ID="pwdPassword" runat="server" MaxLength="16"  TextMode="Password" Width="144px"  onKeyUp="CountLeft(8);"><br />

i need to avoid space in my textbox

Posted 15-Apr-12 23:34pm

mayur csharp G

Updated 15-Apr-12 23:36pm

Sridhar Patnayak

v3

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Comments

Dhanamanikandan 16-Apr-12 5:43am

your question is to trim the input textbox value?

4 solutions

Solution 2

Hi,
You need to use JavaScript. Take a look at this post which JavaScript has been used to disallow various characters:
http://www.tek-tips.com/viewthread.cfm?qid=1581320[^]
I hope it helps,
Cheers

Posted 15-Apr-12 23:43pm

Reza Ahmadi

Comments

Member 13686664 28-Mar-18 5:34am

hi. is there any way to restrict users to type just 1 white space between words in text box. i use trim for space before and after words but in the middle of words is needed to be allowed just 1 space.
by the way I'm working with c# and windows form project.
many thanks

Solution 4

<html>
<head>
<script type="text/javascript">

function blockSpace(e)
{
	var key;
	var isCtrl = false;
	var keychar;			
	if(window.event) {
		key = e.keyCode;
		isCtrl = window.event.ctrlKey
	}
	else if(e.which) {
		key = e.which;
		isCtrl = e.ctrlKey;
	}	
	keychar = String.fromCharCode(key);	
	if(keychar==" ")
	{
		return false;
	}	
}

</script>
</head>
<body>

<input type="text" onkeypress="return blockSpace(event);" />

</body>
</html>

Posted 16-Apr-12 0:26am

vino2012

Updated 16-Apr-12 1:34am

v2

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Sridhar Patnayak · Accepted Answer · 2012-04-15T23:39:00

If you intended to capture a value where spaces aren't a valid character, you could use a RegularExpressionValidator

<asp:regularexpressionvalidator id="rev" runat="server" controltovalidate="txtBox" xmlns:asp="#unknown">
    ErrorMessage="Spaces are not allowed!" ValidationExpression="[^\s]+" />
<asp:requiredfieldvalidator id="rfv" runat="server" controltovalidate="txtBox">
    ErrorMessage="Value can't be empty" /></asp:requiredfieldvalidator></asp:regularexpressionvalidator>

In aspx.cs page

void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
     if ((sender as TextBox).SelectionStart == 0)
          e.Handled = (e.KeyChar == (char)Keys.Space);
     else
          e.Handled = false;
}

Their are many ways to avoid spaces

Thanks & Regards,
SP

VJ Reddy · Accepted Answer · 2012-04-15T23:49:00

Solution 3

The Solution 1 by Sridhar Patnayak is very good. But the validation expression [^\s]+ does not allow spaces within the match but allows spaces surrounding the match. So, for eg. Two Words are entered in the TextBox, it will match Two and Words. To ensure that no space is allowed any where in the TextBox , the ValidationExpression "^[^\s]+$" can be used.

Posted 15-Apr-12 23:49pm

VJ Reddy

Comments

Sridhar Patnayak 16-Apr-12 8:19am

Agree with you. 5+

VJ Reddy 16-Apr-12 8:37am

Thank you, Sridhar.