ObjectDataSource, CustomValidators and DataBinding
<p>I have an ObjectDataSource that is bound to a GridView. The object accepts a parameter from a TextBox. The problem I have is when I use a CustomerValidator with a ServerValidate event, the  ObjectDataSource would still attempt to perform a DataBind despite the fact the the customer validator has returned false.</p>

<p>The following is the code in the ASPX page.</p>

<pre><code>&lt;asp:TextBox ID="sittingDate" runat="server" /&gt;
&lt;asp:CustomValidator ID="DateValidator" runat="server" ControlToValidate="sittingDate" OnServerValidate="DateValidator_ServerValidate" /&gt;
&lt;asp:ObjectDataSource ID="BatchDataSource" runat="server" OldValuesParameterFormatString="original_{0}"
        SelectMethod="GetOrCreateSittingBatch" TypeName="BatchBLL" OnSelected="BatchDataSource_Selected" OnSelecting="BatchDataSource_Selecting"&gt;
        &lt;SelectParameters&gt;
            &lt;asp:ControlParameter ControlID="sittingDate" Name="batchDate" PropertyName="Text"
                Type="DateTime" /&gt;
        &lt;/SelectParameters&gt;
    &lt;/asp:ObjectDataSource&gt;
&lt;asp:GridView ID="BatchGridView" runat="server" DataSourceID="BatchDataSource"&gt;
</code></pre>

<p>In the Custom Validator I have</p>

<pre><code>protected void DateValidator_ServerValidate(object source, ServerValidateEventArgs args)
{
        //Ensure that the entered data is a date.
        string input = args.Value;

        DateTime result;
        args.IsValid = DateTime.TryParse(input.TrimEnd(), out result);
}
</code></pre>

<p>How do I stop the ObjectDataSource from data binding when validation has failed?</p>
