如果发生验证错误,我在必填字段验证器控件上使用什么属性使文本框变为红色?

这是我的代码:

<asp:Label ID="lblFirstName" runat="server" AssociatedControlID="txtFirstName" Text="First Name:" CssClass="reg-labels" />
<br />
<asp:TextBox ID="txtFirstName" runat="server" CausesValidation="true" MaxLength="60" CssClass="standard_width"/>
<asp:RequiredFieldValidator ControlToValidate="txtFirstName" runat="server" ID="valFirstName" ValidationGroup="grpRegistration" ErrorMessage="First Name is required." Text="*" />

最佳答案

ASP.Net Web表单内部使用位于aspnet_client\{0}\{1}文件夹中的Javascript frameworka来进行验证等。它们基本上是由 ClientScriptsLocation 属性确定的

尝试覆盖默认框架函数,方法是将其保留在您的页面中,其中包括用于设置control_to_validate颜色的其他行
document.getElmentById(val.controltovalidate).style.border='1px solid red';

<asp:TextBox ID="txtFirstName" runat="server" CausesValidation="true" MaxLength="60"
    CssClass="standard_width" />
<asp:RequiredFieldValidator ControlToValidate="txtFirstName" runat="server" ID="valFirstName" ValidationGroup="grpRegistration" ErrorMessage="First Name is required." Text="*" />
<asp:Button Text="Super" ID="btnSubmit" CausesValidation="true" runat="server" />

JS
<script type="text/javascript">
    function ValidatorUpdateDisplay(val) {
        if (typeof (val.display) == "string") {
            if (val.display == "None") {
                return;
            }
            if (val.display == "Dynamic") {
                val.style.display = val.isvalid ? "none" : "inline";
                return;
            }

        }
        val.style.visibility = val.isvalid ? "hidden" : "visible";
        if (val.isvalid) {
            document.getElementById(val.controltovalidate).style.border = '1px solid #333';
        }
        else {
            document.getElementById(val.controltovalidate).style.border = '1px solid red';
        }
    }
</script>

关于asp.net - 需要时,如何突出显示文本框边框为红色?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/21237890/

10-13 01:55