.NET CustomValidator：阻止提交按钮

Question

我正在尝试将自定义字段验证器添加到一些遗留代码。如果电子邮件不属于某个域，它应该阻止表单触发。

这是我的标记。

<asp:Textbox id="tbEmail" autocomplete="off" CssClass="txt260" runat="server" TabIndex="1"></asp:Textbox>          
<asp:RequiredFieldValidator id="rfvEmail" runat="server" Display="Dynamic" ForeColor="" ControlToValidate="tbEmail" ErrorMessage="Required" CssClass="ValidatorError">Required</asp:RequiredFieldValidator>
<asp:CustomValidator id="cfvEmail" runat="server" Display="Dynamic" ControlToValidate="tbEmail" ErrorMessage="Invalid Email" CssClass="ValidatorError" OnServerValidate="tbEmail_CustomValidate"></asp:CustomValidator>
<asp:RegularExpressionValidator id="regExpEmail" runat="server" Display="Dynamic" ForeColor="" ControlToValidate="tbEmail" ErrorMessage="Invalid" CssClass="ValidatorError"></asp:RegularExpressionValidator>

...

<asp:Button ID="bSubmit" Text=" CREATE ACCOUNT " CssClass="NewButton" runat="server" OnClientClick="DisabledUpdateButton()" OnClick="bSubmit_Click" />

这是 C# 代码：

protected void tbEmail_CustomValidate(object source, ServerValidateEventArgs args)
{
    List<string> approvedEmailDomains = new List<string>()
    {
        "domainnameihid.com"
    };

    if (!approvedEmailDomains.Any(x => tbEmail.Text.EndsWith(x)))
    {
        args.IsValid = false;
    }
}

当我写一个无效的域名时，代码落入args.IsValid = false。一旦 args.IsValid 为假，它仍然会继续触发提交按钮。必需和常规字段验证器没有。如何让 CustomValidator 阻止按钮的 OnClick 触发或继续？

Answer 1

您还需要创建客户端验证。您可以使用验证器的ClientValidationFunction 来执行此操作。

<asp:CustomValidator ID="CustomValidator1" runat="server" ControlToValidate="tbEmail"
   ClientValidationFunction="allowedDomains" ErrorMessage="Not Valid"></asp:CustomValidator>

<script type="text/javascript">
    function allowedDomains(sender, element) {
        var approvedDomains = ['<%= string.Join("', '", approvedEmailDomains) %>'];
        element.IsValid = $.inArray(element.Value, approvedDomains) > -1;
    }
</script>

为此，您需要一个public 列表

public List<string> approvedEmailDomains;

protected void Page_Load(object sender, EventArgs e)
{
    approvedEmailDomains = new List<string>()
    {
        "domainnameihid.com",
        "stackoverflow.com"
    };
}