asp.net的CustomValidator永远不会触发OnServerValidate(asp.

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>

和下面的代码后面的CustomValidator1_ServerValidate（）方法：

    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，我把文本框...

应该提到这是ASP.NET 2.0

Answer 1:

为了使用的CustomValidator，您还需要为同一控制一个RequiredFieldValidator。只要把用于NoteDateTextBox一个RequiredFieldValidator，它应该触发的CustomValidator的服务器事件为您服务。

Answer 2:

当您在测试如果文本框为空，使用此ValidateEmptyText =“真”上的CustomValidator。

否则必填字段验证将无法正常工作。

Answer 3:

要添加到丹的反应，使用的另一种方式CustomValidator是：

取出ControlToValidate属性
在你OnServerValidate方法，引用您要验证，而不是使用控制ServerValidateEventArgs.Value ，如

例

盈方代码

<asp:ValidationSummary runat="server" DisplayMode="BulletList" ValidationGroup="form" />

<asp:TextBox runat="server" ID="_textbox"/>
<asp:CustomValidator runat="server" 
        ErrorMessage="Please enter the secret" 
        OnServerValidate="TextBoxValidate"
        ValidationGroup="form" 
        Display="None"
        EnableClientScript="false" />
<asp:button runat="server" OnClick="ButtonClick" Text="Press" />

后面的代码

protected void ButtonClick(object sender, EventArgs e)
{
    Page.Validate();

    if (Page.IsValid)
    {
        // Do something
    }
}

protected void TextBoxValidate(object sender, ServerValidateEventArgs args)
{
    args.IsValid = _textbox.Text == "secret";
}