how to allow only character (a-z) and number(0-9) only in the textbox?

[hidayu1986]

currently i try this code but:

-->for alphanumeric (allow alphanumeric : a-z,0-9,(symbol))
<asp:textbox onkeypress="if(((event.keyCode>=39)&amp;&amp;(even t.keyCode<=39))){event.returnValue=false;}"
id="txtStfNo" runat="server" Font-Names="Arial" Font-Size="9pt" MaxLength="10" Width="440px" Height="60px"></asp:textbox>



<asp:textbox onkeypress="if(((event.keyCode>=39)&amp;&amp;(even t.keyCode<=39))){event.returnValue=false;}"
id="txtccno" runat="server" Font-Names="Arial" Font-Size="9pt" MaxLength="10" Width="440px" Height="60px"></asp:textbox>


--->allow numeric only
<asp:textbox onkeypress="if(((event.keyCode>=32)&amp;&amp;(even t.keyCode<=47))||((event.keyCode>=58)&amp;&amp;(ev ent.keyCode<=254))){event.returnValue=false;}"
id="Textbox1" runat="server" Font-Names="Arial" Font-Size="9pt" MaxLength="10" Width="152px"></asp:textbox>

---allow symbol only
<asp:textbox onkeypress="if(((event.keyCode>=48)&amp;&amp;(even t.keyCode<=57))||((event.keyCode>=65)&amp;&amp;(ev ent.keyCode<=90))||((event.keyCode>=97)&amp;&amp;( event.keyCode<=122)) ){event.returnValue=false;}"
id="Textbox1" runat="server" Font-Names="Arial" Font-Size="9pt" MaxLength="10" Width="152px"></asp:textbox>



but i want to allow only a-z character and 0-9 number. not allow any symbol

[CroCrew]

Look into using AJAX. A FilteredTextBox extender would make life so much easier for you. Here is a link: http://www.asp.net/ajax/ajaxcontrolt...edTextBox.aspx

Happy Coding,
CroCrew~

[hidayu1986]

this tollbox doesnt have the example which allow only a-z character and 0-9 number. let say i have a textbox. then i want this textbox allow only a-z character and 0-9 number.not allow symbol.how?

[CroCrew]

Yes it does. Use this:

<ajaxToolkit:FilteredTextBoxExtender 
    ID="ftbe" 
    runat="server"
    TargetControlID="TextBox3"         
    FilterType="UppercaseLetters, LowercaseLetters, Numbers" />
 

Happy Coding,
CroCrew~