MultiLineTextBoxValidator

The MultiLineTextBoxValidator is a validator control which will restrict the length of MultiLine TextBox controls.

Features

• All actions can be performed either server side with postbacks or client side without postbacks.
• Restrict length of TEXTAREAs using JavaScript.
• Use JavaScript alert popups if input exceeds maxlength property.
• Provide user feedback with a character remaining counter.

Code Example

<%@ Register TagPrefix="fluent" Namespace="Fluent.MultiLineTextBoxValidator" Assembly="Fluent.MultiLineTextBoxValidator" %>

Message:<br/>
<asp:TextBox id="TestTextBox" Runat="server"
    Rows="10" 
    Columns="50" 
    TextMode="MultiLine" />
<br/>

<fluent:MultiLineTextBoxValidator Runat="server" 
    ControlToValidate="TestTextBox" 
    MaxLength="10" 
    OutputControl="TestTextBox2" 
    ErrorMessage="Too long!" 
    ShowJavascriptAlert="True" 
    EnableClientSideRestriction="True" 
    ShowCharacterCount="True" />
    
<br/><br/>
                        
<asp:TextBox id="TestTextBox2" Runat="server" /> characters remaining
<br/><br/><br/>

<asp:Button Runat="server" Text="Submit" />