我一直在使用.NET的xVal框架进行一些开发,以连接服务器端模型的一些验证规则以及使用jQuery Validation plugin的一些客户端验证以及用于提交表单的jQuery Form plugin。
然而,我在将它们连接在一起时遇到了问题。
我正在努力实现以下目标:
允许客户端使用通过调用jQuery Validation的rules("add", options")
插件定义的规则来执行基本验证(这是xVal用于获取模型上服务器端定义的规则的内容)。
如果客户端验证成功,则调用服务器以再次输入执行验证的表单数据(在客户端上验证的项目,以及在客户端中无法执行的任何其他验证) )。
让服务器返回JSON中的对象,该对象指示可能具有特定字段的任何错误,然后设置字段的错误显示。
我通过以下方式调用xVal,在ASP.NET MVC页面中设置了插件的元数据:
<%= Html.ClientSideValidation<Model>("model") %>
这在客户端转换为以下内容:
<script type="text/javascript">
xVal.AttachValidator("model",
{
"Fields":
[
{
"FieldName":"title",
"FieldRules":
[
{
"RuleName":"Required",
"RuleParameters":{}
},
{
"RuleName":"StringLength",
"RuleParameters":
{
"MaxLength":"250"
}
}
]
},
{
"FieldName":"body",
"FieldRules":
[
{
"RuleName":"Required",
"RuleParameters":{}
}
]
}
]
}, {})
</script>
上面的内容实际上只是转换为rules("add", options)
的一系列调用,然后jQuery验证器插件会处理这些调用。
但是,当尝试通过jQuery表单发布此表单时,不会对表单值进行验证。表单提交,但值根本没有验证。
如何通过调用ajax
通过jQuery Validation插件验证,使用jQuery Form插件提交表单?
答案 0 :(得分:5)
将所有这些放在一起时要注意的最重要的事情是一小段文档(在xVal的文档中并不是很明显,xVal的文档抽象了{{{在rules("add", options)
的{{1}}调用中{1}}(强调我的):
添加指定的规则并返回 第一个匹配的所有规则 元件。 要求父母 表格经过验证,即 调用$(“form”)。validate() 第一强>
当jQuery Form插件发挥作用,并且您想通过AJAX提交表单时,这一点尤其重要,因为您必须在validate(options)
的调用中设置xVal.AttachValidator
选项,就像这样:
rules("add", options)
由于上面引用的有关submitHandler
,的来电的文档,对<script type="text/javascript">
$(document).ready(function() {
// Initialize the form. Store the validator.
var validator = $("form").validate({
// Called when the form is valid.
submitHandler: function(form) {
// Submit the form via ajax.
$(form).ajaxSubmit({
// The return data type is json.
dataType: "json",
// The callback on a successful form
// submission.
success: function(data, statusText) {
// If the new location is not null, then
// redirect to that location.
if (data.data.newLocation) {
// Go to the new location.
document.location.href = data.data.newLocation;
// Get out.
return;
}
// There are errors, pass them to the validator
// for display.
validator.showErrors(data.data.errors);
}
});
}
});
});
</script>
的调用必须在调用rules("add", options)
之前发出。
如果没有,则忽略submitHandler,从不调用。
最后,这意味着将所有客户端代码放在一起时必须看起来像这样:
validate(options)
最后,在所有这些连线的情况下,最后要做的是在服务器端方法返回时该怎么做。
您希望从这些调用返回的JSON类似于标准化的viewmodel shell,其中您将特定于响应的内容包装在一个更标准化的部分中,该部分公开了您在同类调用中所需的信息,如下所示:
rules("add", options)
对于服务器上的错误,返回与上面相同的内容,但是其位置具有成功时用户应重定向到的URL(如果不成功则返回null)和可以直接传递的映射如果字段中存在错误,请使用showErrors(errors)
方法:
<script type="text/javascript" src="jquery-1.3.2.min.js"></script>
<script type="text/javascript" src="jquery.validate.min.js"></script>
<script type="text/javascript" src="jquery.form.js"></script>
<!-- Note this is only needed if using xVal. -->
<script type="text/javascript" src="xVal.jquery.validate.js"></script>
<!-- The call to validate the form must come first. -->
<script type="text/javascript">
$(document).ready(function() {
// Initialize the form.
$("form").validate({
// Called when the form is valid.
submitHandler: function(form) {
// Submit the form via ajax.
$(form).ajaxSubmit({
// The return data type is json.
dataType: "json",
// The callback.
success: function(data, statusText) {
// Alert the users to the message.
window.alert(statusText);
}
});
}
});
});
</script>
<!-- Now make the calls to rules("add", options), AFTER the call to -->
<!-- validate (options). It's separated into another block for -->
<!-- emphasis, but could be done in the block above. -->
<script type="text/javascript">
// Make calls to rules("add", options).
</script>
<!-- Or, if you are using xVal, make the following call in the ASP.NET -->
<!-- page but again, note it must come AFTER the call to -->
<!-- validate(options). -->
<%= Html.ClientSideValidation<Model>("model") %>
鉴于此,传递给success
field of the options
parameter的ajaxSubmit
应该是明确的:
{
// An integer, non-zero indicates faulure, with predefined ranges
// for standard errors across all operations, with other ranges for custom
// errors which are operation-specific. Examples of shared errors
// are not authenticated, not authorized, etc, etc.
resultCode: 0,
// A string, which is to be displayed to the user (usually in the
// form of a jQuery dialog, usually used for the common ranges of
// errors defined above.
message: null,
// An object with operation-specific results.
data: null
}
它只是检查是否定义了{
resultCode: 0,
message: null,
data:
{
// Returned as a string. If not null, then this is the url
// that the client should be redirected to, as the server-side
// operation was successful.
newLocation: null,
// If not-null, then this is a map which has the names of the
// fields with the errors, along with the errors for the fields.
errors:
{
"model.title": "The title already exists in the system.",
"model.body": "The body cannot have malicious HTML code in it."
}
}
}
属性。如果已定义,则将当前文档重定向到该位置(通常是新保存资源的URL)。
如果没有定义,那么它将获取地图并将其传递给// The callback on a successful form
// submission.
success: function(data, statusText) {
// If the new location is not null, then
// redirect to that location.
if (data.data.newLocation) {
// Go to the new location.
document.location.href = data.data.newLocation;
// Get out.
return;
}
// There are errors, pass them to the validator
// for display.
validator.showErrors(data.data.errors);
}
调用返回的newLocation
上的showErrors
,使用调用指定的定位和样式设置错误消息到validate(options)
。