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POCustomValidator textbox required on radiobuttonlist select
 

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  1. POCustomValidator textbox required on radiobuttonlist select
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    <p>On my page I have a Radio button list and a textbox.</p> <p>The textbox is hidden by default then appears if the user clicks yes. Once they click yes then the textbox must be filled in before they can proceed.</p> <p>I've put in the following code, however it doesn't seem to work at all and when the button is pressed to go to the next page it continues instead of stopping and asking the user to enter something in the box.</p> <pre><code>function Q12iYes() { document.getElementById('txt12i').style.display = "block" } function Q12iNo() { document.getElementById('txt12i').style.display = "none" } &lt;asp:RadioButtonList ID="rbtn12" runat="server" RepeatDirection="Horizontal"&gt; &lt;asp:ListItem Value="Yes" onclick="Q12iYes()" /&gt; &lt;asp:ListItem Value="No" Selected="True" onclick="Q12iNo()" /&gt; &lt;/asp:RadioButtonList&gt; &lt;br /&gt; 12.i) If &amp;#39;Yes&amp;#39; please provide details&lt;br /&gt; &lt;br /&gt; &lt;asp:TextBox ID="txt12i" runat="server" Height="62px" TextMode="MultiLine" Width="343px"&gt;&lt;/asp:TextBox&gt; &lt;br /&gt; &lt;asp:CustomValidator ID="MyTxtBoxValidator" runat="server" ControlToValidate="txt12i" ValidateEmptyText="true" ErrorMessage="Please enter some values into Textbox" ClientValidationFunction="validateMyBtn" Display="Dynamic"&gt; &lt;/asp:CustomValidator&gt; &lt;script type="text/javascript"&gt; function validateMyBtn(oSrc, args) { var rbtnValue = null; var rbtnList = document.getElementsByName('&lt;%=rbtn12.ClientID %&gt;'); var radio = rbtnList[0].getElementsByTagName("input"); for (var i = 0; i &lt; radio.length; i++) { if (radio[i].checked) rbtnValue = radio[i].value; } if (rbtnValue == "Yes") { args.IsValid = !(args.Value == "") } else { args.IsValid = true; } } &lt;/script&gt; &lt;asp:Button ID="btnContinue" runat="server" OnClick="btnContinue_Click" Text="Continue" /&gt; </code></pre> <p>I have had a look for how to do it, but nothing I have seen has worked either, or helped me understand where I'm going wrong. </p> <p>Can anyone help?</p>
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    1. CODo you need a custom validator? Why not use a required field validator? If the input box is not visible the required field validator won't try to validate.
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      1. USJack Pettinger
    2. COFrom all my searches it seemed custom validator was what I needed as I'm using javascript to show and hide the text box when the user selects. I'm trying to find the most effective way of doing it.
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    3. COAre you able to use jQuery?
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      1. USJack Pettinger
 

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