基于验证更改控件的样式（ASP.NET） [英] Changing a control's style based on validation (ASP.NET)
问题描述
我有一个非常简单的形式有以下困扰片断：
＆LT; ASP：面板类=正常ID =Panel1的=服务器＆GT;
＆LT;强＆GT;＆LT; ASP：标签ID =Panel1Error级=错误可见=假=服务器/＆GT;＆LT; / STRONG＆GT; ＆LT;标签=TextBox1的＆GT;＆LT;环境监察及GT; * LT; / EM＆GT;不要将此处留空＆LT; /标签＆gt;
＆LT; ASP：文本框ID =TextBox1的=服务器/＆GT; ＆LT; ASP：的RequiredFieldValidator ID =TextBox1RFV=服务器
的ControlToValidate =TextBox1中的ErrorMessage =该字段不能为空。
显示=无/＆GT; ＆LT; ---其他验证---＆GT;
＆LT; / ASP：面板＆gt;
有我想要当页面验证失败做两件事情：
-
Panel1的风格变化（以其中一个显示不同的颜色来指示错误）。我可以通过调用Page.Validate在Page_Load中，然后通过迭代Page.Validators，让每个校验的父控件，它转换为一个小组，然后设置.CssClass似乎并不像一个极好的解决方案，要做到这一点，但它得到的完成任务 - 有没有更好的办法
？ -
我要采取任何验证错误（S）都扔掉，并把它们在Panel1Error标签，以及将其设置为可见。这是我有点困惑。我起初以为我可能指定在一个验证写入其的ErrorMessage的标签，但我却没有这样的运气。如果我只是折腾标签内的验证，其格式设置弄乱了页面的整个布局，无论我直接分配给它的'错误'的CSS类或让它在标签中。
只是为了澄清，在生产，我会做这个过程中多个面板页面上，每一个表单元素，preventing我从显式调用面板和只是说Panel1.CssClass等。
- 我会推荐一个JavaScript的解决方案。 ASP.NET注入一个全局变量JS所谓Page_Validators，这是所有验证器的数组横跨在页面上。我写这个的<一个href=\"http://john.rummell.info/john/blog/post/Apply-the-same-CSS-class-to-all-validators-in-a-web-project.aspx\"相对=nofollow>我的博客。这是一个不同的解决方案，但它应该给你足够的洞察力开始。
- 使用的ValidationSummary 与控制一个的ValidationGroup 每个小组。
I've got a very simple form with the following troubled snippet:
<asp:Panel class="normal" ID="Panel1" runat="server">
<strong><asp:Label ID="Panel1Error" class="error" Visible="false" runat="server"/></strong>
<label for="TextBox1"><em>*</em> Don't leave this blank</label>
<asp:TextBox ID="TextBox1" runat="server" />
<asp:RequiredFieldValidator ID="TextBox1RFV" runat="server"
ControlToValidate="TextBox1" ErrorMessage="This field cannot be blank."
Display="None" />
<--- other validators --->
</asp:Panel>
There are two things I want to do when the page fails validation:
Change the style of Panel1 (to one which shows different colors to indicate an error). I was able to do this by calling Page.Validate in Page_Load, then iterating over Page.Validators, getting each validator's parent control, casting it to a Panel, then setting .CssClass Doesn't seem like a superb solution, but it got the job done - is there a better way?
I want to take whatever validation error(s) are thrown and put them in the Panel1Error label, as well as set it to visible. This is where I am a bit baffled. I thought at first I could possibly specify the Label in which a validator writes its ErrorMessage, but I had no such luck. If I just toss the validator inside the Label, its formatting messes up the entire layout of the page, regardless of whether I directly assign it the 'error' CSS class or just leave it in the Label.
Just to clarify, in production, I would be doing this process for multiple Panels on a page, each with one form element, preventing me from calling the Panels explicitly and just saying Panel1.CssClass, etc.
- I would recommend a javascript solution. ASP.NET injects a global js variable called Page_Validators, which is an array of all of the validator spans on the page. I wrote about this on my blog. It's a different solution, but it should give you enough insight to get started.
- Use ValidationSummary controls with a ValidationGroup for each panel.
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