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PORequiredFieldValidators on a custom composite control
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  1. PORequiredFieldValidators on a custom composite control
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    copied!<p>I have designed a custom composite control. For simplicity's sake, let's say it looks like this:</p> <pre><code>Public Class MyCustomControl Inherits CompositeControl Private _textbox As TextBox Public Property Text As String Get EnsureChildControls() Return _textbox.Text End Get Set(value As String) EnsureChildControls() _textbox.Text = value End Set End Property Protected Overrides Sub CreateChildControls() _textbox = New TextBox() With {.ID = "textbox"} Controls.Add(_textbox) End Sub </code></pre> <p>Now I am trying to allow consumers of <code>MyCustomControl</code> to use a <code>RequiredFieldValidator</code> to ensure that the inner <code>_textbox</code> is filled out when a form submits (on the client).</p> <p>What I have tried:</p> <ul> <li>Added the <code>&lt;ValidationProperty("Text")&gt;</code> to the <code>MyCustomControl</code> Class and used <code>ControlToValidate="customControlID"</code> on the <code>RequiredFieldValidator</code> (see <a href="http://support.microsoft.com/kb/310082" rel="nofollow">here</a>)</li> <li>Directly attach the validator via <code>ControlToValidate="customControlID:textbox"</code> as well as <code>ControlToValidate="customControlID_textbox"</code></li> <li>Added an <code>IsRequired</code> attribute to <code>MyCustomControl</code> which adds it's own <code>RequiredFieldValidator</code> as a child control with <code>.ControlToValidate = _textbox.ID</code></li> </ul> <p>The third approach does appear to work (there are some javascript errors that I have not yet looked into) but I would really like to get the FIRST approach working (using the <code>ValidationProperty</code> attribute).</p> <p><strong>TLDR: Is there any way to use the <code>ValidationProperty</code> attribute to achieve client-side validation on a custom composite control?</strong></p>
 

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