asp.net的CustomValidator永远不会触发OnServerValidate

问题描述

我有以下的ASP页：

<asp:Content ID="Content2" ContentPlaceHolderID="ShellContent" runat="server">
    <form runat="server" id="AddNewNoteForm" method="post"">

        <fieldset id="NoteContainer">
            <legend>Add New Note</legend>
            <asp:ValidationSummary ID="ValidationSummary1" runat="server" />
            <div class="ctrlHolder">
                <asp:Label ID="LabelNoteDate" runat="server" Text="Note Date" 
                    AssociatedControlID="NoteDateTextBox"></asp:Label>
                <asp:TextBox ID="NoteDateTextBox" runat="server" class="textInput" 
                    CausesValidation="True" ></asp:TextBox>
                <asp:CustomValidator 
                        ID="CustomValidator1" 
                        runat="server" 
                        ErrorMessage="CustomValidator" 
                        ControlToValidate="NoteDateTextBox" 
                        OnServerValidate="CustomValidator1_ServerValidate" 
                        Display="Dynamic" 
                        >*</asp:CustomValidator>
            </div>
            <div class="ctrlHolder">
                <asp:Label ID="LabelNoteText" AssociatedControlID="NoteTextTextBox" runat="server" Text="Note"></asp:Label>
                <asp:TextBox ID="NoteTextTextBox" runat="server" Height="102px" 
                    TextMode="MultiLine" class="textInput" ></asp:TextBox>
                <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" 
                    ErrorMessage="Note Text is Required" ControlToValidate="NoteTextTextBox">*</asp:RequiredFieldValidator>   

            </div>
            <div class="buttonHolder">
                <asp:Button ID="OkButton" runat="server" Text="Add New Note"  
                    CssClass="primaryAction" onclick="OkButton_Click"/>
                <asp:HyperLink ID="HyperLink1" runat="server">Cancel</asp:HyperLink>
            </div>
        </fieldset>
    </form>
</asp:Content>

和背后以下code为CustomValidator1_ServerValidate（）方法：

and the following code behind for the CustomValidator1_ServerValidate() method:

    protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
    {

        if (string.IsNullOrEmpty(args.Value.Trim()))
        {
            args.IsValid = false;
            CustomValidator1.ErrorMessage = "Note Date is Required!";
            return;
        }

        DateTime testDate;
        if (DateTime.TryParse(args.Value, out testDate))
        {
            args.IsValid = true;
            CustomValidator1.ErrorMessage = "Invalid Date!";
        }

    }

它似乎永远不会失败验证不管是什么我把在文本框中...

It never seems to fail validation no matter what I put in the text box...

应该提到这是ASP.NET 2.0

Should mention this is ASP.NET 2.0

推荐答案

为了使用的CustomValidator，您还需要为同一控制一个RequiredFieldValidator。只要把一个RequiredFieldValidator为NoteDateTextBox，它应该解雇的CustomValidator的服务器事件给你。

In order to use a customvalidator, you also need a requiredfieldvalidator for that same control. Just put a requiredfieldvalidator for NoteDateTextBox and it should fire the customvalidator's server event for you.

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