如何利用扩展方法来链式的对MVC 3中的页面进行验证

public static class Extensions

{

public static string EndWith(this string str)

{

return str + "@";

}

}

string str = "";

Response.Write(str.EndWith());

namespace MvcWeb.Extensions

{

public class JqueryHelper

{

public ViewContext ViewContext { get; private set; }

public WebViewPage ViewPage { get; private set; }

public RouteCollection RouteCollection { get; private set; }

public JqueryHelper(ViewContext viewContext, WebViewPage page, RouteCollection routeCollection)

{

this.ViewContext = viewContext;

this.ViewPage = page;

this.RouteCollection = routeCollection;

}

public JqueryHelper(ViewContext viewContext, WebViewPage viewPage) : this(viewContext, viewPage, RouteTable.Routes) { }

}

public static class JqueryExtensions

{

public static JqueryHelper Jquery(this WebViewPage page)

{

var key = typeof(JqueryHelper);

var jquery = page.PageData[key] as JqueryHelper;

if (jquery == null)

{

page.PageData[key] = jquery = new JqueryHelper(page.ViewContext, page);

}

return jquery;

}

}

public class JqueryValidations

{

public WebViewPage Page { get; private set; }

public JqueryValidations(WebViewPage page)

{

this.Page = page;

}

private Dictionary<string, Dictionary<string, object>> m_rules = new Dictionary<string, Dictionary<string, object>>();

private Dictionary<string, Dictionary<string, object>> m_message = new Dictionary<string, Dictionary<string, object>>();

public void Required(string name,string message)

{

this.AddRuleAndMessage(name, "required", true, message);

}

public void Email(string name, string message)

{

this.AddRuleAndMessage(name,"email",true,message);

}

public void Number(string name, string message)

{

this.AddRuleAndMessage(name, "number", true, message);

}

public void Range(string name,int min,int max, string message)

{

this.AddRuleAndMessage(name, "range", new int[] { min, max }, message);

}

public string ToScripts(string form)

{

JavaScriptSerializer serializer = new JavaScriptSerializer();

StringBuilder builder = new StringBuilder();

builder.Append("$(");

serializer.Serialize(form, builder);

builder.Append(").validate(");

serializer.Serialize(

new

{

rules = this.m_rules,

messages = this.m_message,

onkeyup = false

}, builder);

builder.Append(");");

return builder.ToString();

}

public ValidationElement Element(string name)

{

return new ValidationElement(name, this);

}

private void AddRuleAndMessage(string name, string rule, object value, string message)

{

if (!this.m_rules.ContainsKey(name))

{

this.m_rules[name] = new Dictionary<string, object>();

}

this.m_rules[name][rule] = value;

if (!string.IsNullOrEmpty(message))

{

if (!this.m_message.ContainsKey(name))

{

this.m_message[name] = new Dictionary<string, object>();

}

this.m_message[name][rule] = message;

}

}

}

public class ValidationElement

{

public ValidationElement(string name, JqueryValidations validations)

{

this.Name = name;

this.Validations = validations;

}

public string Name { get; private set; }

public JqueryValidations Validations { get; private set; }

public ValidationElement Required(string message)

{

this.Validations.Required(this.Name, message);

return this;

}

public ValidationElement Email(string message)

{

this.Validations.Email(this.Name, message);

return this;

}

public ValidationElement Number(string message)

{

this.Validations.Number(this.Name, message);

return this;

}

public ValidationElement Range(int min, int max, string message)

{

this.Validations.Range(this.Name, min, max, message);

return this;

}

}

public static class JQueryValidationExtensions

{

public static JqueryValidations Validations(this JqueryHelper jquery)

{

return jquery.Validations("(default)");

}

public static JqueryValidations Validations(this JqueryHelper jquery, string name)

{

var key = typeof(JqueryValidations) + "+" + name;

var page = jquery.ViewPage;

var validations = page.PageData[key] as JqueryValidations;

if (validations == null)

{

page.PageData[key] = validations = new JqueryValidations(page);

}

return validations;

}

}

}

@{

Layout = null;

}

@using MvcWeb.Extensions

<!DOCTYPE html>

<html>

<head>

<title>Index</title>

<script src="http://www.cnblogs.com/Scripts/jquery-1.5.1.js" type="text/javascript"></script>

<script type="text/javascript" src="@Url.Content("http://www.cnblogs.com/Scripts/jquery-1.5.1-vsdoc.js")"></script>

<script type="text/javascript" src="@Url.Content("http://www.cnblogs.com/scripts/jquery.validate.js")"></script>

</head>

<body>

<div>

<form id="form" action="" method="post">

<input type="text" id="user.Name" name="user.Name" />

@{ this.Jquery().Validations().Required("user.Name","用户名是必填的 亲");}

<select name="user.Gender">

<option value="">Please select...</option>

<option value="1">Male</option>

<option value="2">Femle</option>

</select>

@{ this.Jquery().Validations().Required("user.Gender", null);}

<input type="text" name="user.Email" />

@{this.Jquery().Validations().Element("user.Email").Required("邮箱是必填的").Email("请填写正确的邮箱格式");}

<input type="submit" value="提交" />

</form>

</div>

<script type="text/javascript">

@Html.Raw(this.Jquery().Validations().ToScripts("#form"))

</script>

</body>

</html>