在控制模糊更新的ValidationSummary列表？ [英] Update ValidationSummary list on control blurs?

问题描述

一个的ValidationSummary将显示在回传错误的列表。由于每个字段是固定的，它的验证器被触发，任何验证文本将消失。我想自动更新的ValidationSummary为好。

A ValidationSummary will show a list of errors on postback. As each field is fixed, it's validator is fired, and any validation text will disappear. I want to automatically update the ValidationSummary as well.

以下正常工作：

<asp:TextBox ID="ForenameTextBox" onblur="ValidationSummaryOnSubmit()" runat="server" />

，但这不是理想的，因为它意味着改变，并在所有的字段保持此。 （ ValidationSummaryOnSubmit 是微软的功能。）于是，我就动态地做到这一点：

but this isn't ideal, as it means changing and maintaining this on all fields. (ValidationSummaryOnSubmit is a Microsoft function.) So I tried to do it dynamically:

addEvent(window, "load", UpdateValidationSummary);

function addEvent(obj, evType, fn) {
    if (obj.addEventListener) {
        obj.addEventListener(evType, fn, true);
    } else {
        if (obj.attachEvent) {
            var r = obj.attachEvent("on" + evType, fn);
            return r;
        }
    }
}

function removeEvent(obj, evType, fn) {
    if (obj.removeEventListener) {
        obj.removeEventListener(evType, fn, true);
        return true;
    } else if (obj.detachEvent) {
        var r = obj.detachEvent("on" + evType, fn);
        return r;
    }
}

function UpdateValidationSummary() {
    if (typeof (Page_Validators) == "undefined") {
        return;
    }
    var i, val, ctrl;
    for (i = 0; i < Page_Validators.length; i++) {
        val = Page_Validators[i];
        if (val.controltovalidate != null && val.controltovalidate != "") {
            ctrl = document.getElementById(val.controltovalidate);
            if (ctrl != null && typeof (ValidationSummaryOnSubmit) == "function") {
                //add call to ValidationSummary on blur
                addEvent(ctrl, "blur", ValidationSummaryOnSubmit);
            }
        }
    }
}

这不工作，虽然 - 整个的ValidationSummary消失，当一个领域是固定的，而ValidationSummaryOnSubmit功能似乎被调用两次。如果我用一个简单的任务，而不是它的工作原理的addEvent 的功能，但我想，以应付可能已经有一些在的onblur回事领域事件。

This doesn't work though - the whole ValidationSummary disappears when one field is fixed, and the ValidationSummaryOnSubmit function seems to get called twice. If I use a simple assignment instead of the addEvent function it works, but I want to cater for fields that might already have something going on in the onBlur event.

基本上，我想我只需要一个电话到 ValidationSummaryOnSubmit 函数添加到的onblur 的清单处理程序为每个控件。为什么不code以上似乎这样做呢？

Basically I think I just need to add a call to the ValidationSummaryOnSubmit function to the "list" of onBlur handlers for each control. Why doesn't the code above seem to do this?

推荐答案

下面是一个服务器端的方式来获得所有文本框的的onblur属性（也应与验证组工作）：

Here's a server-side approach to get the onblur attribute on all TextBoxes (which should also work with Validation Groups):

• 创建从文字框派生的类，例如，TextBoxEx


• 添加属性在这个派生类中如 this.Attributes.Add（的onblur的String.Format（ValidationSummaryOnSubmit（'{0}'），this.ValidationGroup）;


• 使用标签映射，使所有现有的＆LT的; ASP：文本框＆GT; 标签仍然可以工作：
  ＆LT;＆的System.Web GT;
＆LT;网页和GT;
＆LT; tagMapping＆GT;
＆LT;添加tagType =System.Web.UI.WebControls.TextBox
mappedTagType =MyControls.TextBoxEx/＆GT;
＆LT; / tagMapping＆GT;
＆LT; /页＆GT;
＆LT; /system.web>

• Create a class derived from TextBox, e.g., TextBoxEx
• Add the attribute in this derived class e.g., this.Attributes.Add("onblur", string.Format("ValidationSummaryOnSubmit('{0}')", this.ValidationGroup);
• Use tag mapping so that all of your existing <asp:TextBox> tags will still work: <system.web> <pages> <tagMapping> <add tagType="System.Web.UI.WebControls.TextBox" mappedTagType="MyControls.TextBoxEx"/> </tagMapping> </pages> </system.web>

另一种方法是使用 ControlAdapters 添加的属性。

Another way would be to use ControlAdapters to add the attribute.

相关链接：

了解ASP.NET验证

MSDN - tagMapping元素的网页

这篇关于在控制模糊更新的ValidationSummary列表？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！