how to allow only Alphabetch(a,b,c) charcters in a textbox

Question

3.00/5 (2 votes)

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html code:
<script type ="text/javascript">
function AllowAlphabetName(e)
{
document.getElementById("div_name").innerHTML="";
    document.getElementById("div_name").style.display="none";

  isIE = document.all ? 1 : 0
  keyEntry = !isIE ? e.which : event.keyCode;
  if (((keyEntry >= '65') && (keyEntry <= '90')) || ((keyEntry >= '97') && (keyEntry <= '122')) || (keyEntry == '46') || (keyEntry == '32') || keyEntry == '45')
     return true;
  else
{
   document.getElementById("div_name").innerHTML="<B>Enter only Characters</B>";
            document.getElementById("div_name").style.display="block";

    return false;
      }
}
</script>
<asp:TextBox ID="textbox1" runat="server"></asp:TextBox>
<asp:div id="div_name"></asp:div>

c# code:
 protected void Page_Load(object sender, EventArgs e)
    {

        textbox1.Attributes.Add("onkeypress", "AllowAlphabetName(e)");
}

plz solution it,,,,,

Posted 20-Apr-13 19:00pm

Member 9959371

Updated 21-Apr-13 0:47am

v7

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Comments

Sergey Alexandrovich Kryukov 21-Apr-13 1:19am

Which characters are you trying to filter out, exactly? What's the problem?
In fact, this is not a question.
—SA

Manfred Rudolf Bihy 21-Apr-13 5:39am

Do you have a question to ask?
If your answer to that is yes, then please edit your question and add that question.

3 solutions

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Sergey Alexandrovich Kryukov · Answer 1 · 2013-04-20T19:18:00

Any text box already allows to enter only some characters and nothing else, so the question does not make any sense at all.

The code does remotely resembles the code one would write in order to filter out some characters from the character input for an HTML input element, but no question was asked, no goals and no problems explained, so it all does not allow to provide more detailed answer.

Just few notes: if you mention something like "TextBox", always provide a fully qualified name of the type. The same simple class name can be used in different unrelated libraries. Not in all cases it's possible to see from the context that you use ASP.NET or something else. Also, don't forget to allow character #8, which is the backspace. By some reasons, this key is considered as a character and should not be filtered out.

—SA

Ali Reza Barkhordari · Answer 2 · 2013-04-20T19:25:00

Solution 2

Hi please try with event onKeyUp.
if you use event onKeyPress .this event fires before that pressed key recorded in text box
Hope to help

Posted 20-Apr-13 19:25pm

Ali Reza Barkhordari

Comments

Member 9959371 21-Apr-13 1:38am

Iam also try this properties(onKeyUp),but does not work

Ali Reza Barkhordari 21-Apr-13 1:46am

you can do this easily with jQuery . if you want tell me to put the codes

Member 9959371 21-Apr-13 3:23am

I want insert charcter in a textbox ,if i enter numeric that textbox,it will display message.my code
html code:
<script type ="text/javascript">
function AllowAlphabetName(e)
{
document.getElementById("div_name").innerHTML="";
document.getElementById("div_name").style.display="none";

isIE = document.all ? 1 : 0
keyEntry = !isIE ? e.which : event.keyCode;
if (((keyEntry >= '65') && (keyEntry <= '90')) || ((keyEntry >= '97') && (keyEntry <= '122')) || (keyEntry == '46') || (keyEntry == '32') || keyEntry == '45')
return true;
else
{
document.getElementById("div_name").innerHTML="Enter only Characters";
document.getElementById("div_name").style.display="block";

return false;
}
}
</script>
<asp:TextBox ID="txt_crpname" runat="server">
<asp:div id="div_name">

c# code:
protected void Page_Load(object sender, EventArgs e)
{

txt_crpname.Attributes.Add("onkeypress", "AllowAlphabetName(e)");
}

Ali Reza Barkhordari 21-Apr-13 9:16am

This is easy, just try with this code ( NOTE :: use e.charCode NOT e.keyCode !!!)

IN HTML
<asp:TextBox ID="txt" />

IN SCRIPT
$('input#txt').keyPress(function(e){
if (some constraint on e.charCode not e.keyCode)
{

}
else //invalid
{
e.preventDefault
}
});

just this. sooo easy

Pallavi Waikar · Answer 3 · 2013-04-20T19:56:00

Try this code

XML

<script type="text/javascript">
function ValidateChars(e)
{
isIE = document.all ? 1 : 0
keyEntry = !isIE ? e.which : event.keyCode;
if (((keyEntry >= '65') && (keyEntry <= '90')) || ((keyEntry >= '97') && (keyEntry <= '122')) || (keyEntry == '46') || (keyEntry == '32') || keyEntry == '45')
return true;
else
if (((keyEntry >= '47') && (keyEntry <= '56')) || ((keyEntry >= '97') && (keyEntry <= '122')) || (keyEntry == '46') || (keyEntry == '32') || keyEntry == '45')
{
alert('Number is entered');
return false;
}
else
return false;
}
</script>
<asp:TextBox ID="TextBox1" runat="server" onkeypress="return ValidateChars(event)" ></asp:TextBox>

how to allow only Alphabetch(a,b,c) charcters in a textbox

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