显示“通过”验证 asp.net (req. field)validator 后的图像或文本

发布于 2024-09-12 20:04:10 字数 406 浏览 6 评论 0原文

我有以下 asp.net 代码：

<asp:TextBox CssClass="mf" runat="server" ID="mail1" Width="270" />
<asp:RequiredFieldValidator ID="rfv1" 
                            runat="server" 
                            ControlToValidate="mail1" 
                            Display="Dynamic" />

现在，如果验证通过（无回发），我想显示图像（或文本）

jQuery 解决方案对我来说也很好，但如果 javascript 那就不太安全了已禁用。

原文

I have the following asp.net code:

<asp:TextBox CssClass="mf" runat="server" ID="mail1" Width="270" />
<asp:RequiredFieldValidator ID="rfv1" 
                            runat="server" 
                            ControlToValidate="mail1" 
                            Display="Dynamic" />

Now I want to show an image (or text) if the validation passes on the fly (no postback)

A jQuery solution is also fine by me, but that wouldn't be so safe if javascript is disabled.

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时常饿 2024-09-19 20:04:10

无需依赖外部框架，您就可以利用 ASP.Net 客户端验证框架来处理扩展/高级功能。通过这种方式，您可以使用框架，增强它而不是替换它。

只需一点点 JavaScript 就可以实现您想要的行为。

<asp:TextBox CssClass="mf" runat="server" ID="mail1" Width="270" OnChange="showValidationImage();" />
<asp:RequiredFieldValidator ID="rfv1" 
                        runat="server" 
                        ControlToValidate="mail1" ClientIDMode="Static"
                        Display="Dynamic" >
    <img src="../Image/fail.jpg" />
</asp:RequiredFieldValidator>
<img id="imgPass" src="../Image/pass.jpg" style="visibility:hidden" />
<script language="javascript">
    // This function will be called whenever the textbox changes
    // and effectively hide or show the image based on the state of
    // the client side validation.
    function showValidationImage() {
        if (typeof (Page_Validators) == "undefined") return;

        // isvalid is a property that is part of the ASP.Net
        // client side validation framework
        imgPass.style.visibility = rfv1.isvalid ? "visible" : "hidden";
    }
</script>
<br />
<asp:Button ID="btnSubmit" runat="server" Text="Submit" />

请注意，我使用的是 ASP.Net 4 的 ClientIDMode="Static" 功能，如果您不使用 .Net 4，那么您将需要使用标准 <%= rfv1.ClientID %> 服务器端包含以获取脚本中的客户端 ID。

Without relying on an external framework you can tap into the ASP.Net Client Side Validation framework to handle extended/advanced functionality. In this way you are working with the framework, augmenting it instead of replacing it.

A tiny bit of JavaScript is all that is needed to enable the behavior you want.

<asp:TextBox CssClass="mf" runat="server" ID="mail1" Width="270" OnChange="showValidationImage();" />
<asp:RequiredFieldValidator ID="rfv1" 
                        runat="server" 
                        ControlToValidate="mail1" ClientIDMode="Static"
                        Display="Dynamic" >
    <img src="../Image/fail.jpg" />
</asp:RequiredFieldValidator>
<img id="imgPass" src="../Image/pass.jpg" style="visibility:hidden" />
<script language="javascript">
    // This function will be called whenever the textbox changes
    // and effectively hide or show the image based on the state of
    // the client side validation.
    function showValidationImage() {
        if (typeof (Page_Validators) == "undefined") return;

        // isvalid is a property that is part of the ASP.Net
        // client side validation framework
        imgPass.style.visibility = rfv1.isvalid ? "visible" : "hidden";
    }
</script>
<br />
<asp:Button ID="btnSubmit" runat="server" Text="Submit" />

Notice here that I am using a feature of ASP.Net 4 with ClientIDMode="Static" if you are not using .Net 4 then you will need to use the standard <%= rfv1.ClientID %> server side include to get at the client id inside your script.

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