Allow only to enter Alpha numeric values with some special chracters

[Dhamodharan]

Hi,
I need to allow only alpha numeric value with some special chracters ('_','-','@','.').






Thanks

[Shinu]

Hi Dhamodharan,

RadTextBox can be used with RegularExpressionValidator to validate the input for a specific format. Please have a look at the following code I tried which works fine at my end.

ASPX:

<telerik:RadTextBox ID="RadTextBox1" runat="server">
</telerik:RadTextBox>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" Display="Dynamic"
    ErrorMessage="*" ForeColor="Red" ValidationExpression="^.*(?=.*[a-zA-Z])(?=.*\d)(?=.*[\.@_-]).*$"
    ControlToValidate="RadTextBox1">
</asp:RegularExpressionValidator>
<br />
<telerik:RadButton ID="RadButton1" runat="server" Text="Submit" CausesValidation="true">
</telerik:RadButton>

Here the validation expression is

^.*              : Start
(?=.*[a-zA-Z])   : Letters
(?=.*\d)         : Digits
(?=.*[\.@_-])    : Special characters
.*$              : End

Thanks,
Shinu.

[Dhamodharan]

Hi Shinu,
Thanks for ur Reply.
It works as i should enter a text with alphabet with numeric and a specified special character.
It allows to enter other special character along with specified values. It checks as specified values are mandatory. But my requirement is to allow any type of values may be alphabets or may be numeric values or may be specified special characters or may be mixed of all as follows.
Correct values
ex:  Telerik
ex: 000000
ex:  telerik_fourms007

Invalid Values
ex: telerik_forums007$&% - due to wrong special chracters


Thanks

[Shinu]

Hi Dhamodharan,

Please try the following updated code to achieve your requirement.

ASPX:

<telerik:RadTextBox ID="RadTextBox1" runat="server">
</telerik:RadTextBox>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" Display="Dynamic"
    ErrorMessage="*" ForeColor="Red" ValidationExpression="^[0-9a-zA-Z\.@_-]+$" ControlToValidate="RadTextBox1">
</asp:RegularExpressionValidator>

Thanks,
Shinu.

[srinivas]

<telerik:RadTextBox ID="RadTextBox1" runat="server">
</telerik:RadTextBox>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" Display="Dynamic"
    ErrorMessage="*" ForeColor="Red" ValidationExpression="^.*(?=.*[a-zA-Z])(?=.*\d)(?=.*[\.@_-]).*$"
    ControlToValidate="RadTextBox1">
</asp:RegularExpressionValidator>
<br />
<telerik:RadButton ID="RadButton1" runat="server" Text="Submit" CausesValidation="true">
</telerik:RadButton>

[Pravin]

Thanks