::
管理
2012年5月11日
本文将介绍Linq中的Where与SkipWhile的用法，有时我们容易混淆它们。下面来看一个简单的UnitTest:
[TestMethod] public void TestSkipWhileAndWhereLinq() { //arrange string[] names = { "Jalpesh", "Jayesh", "Tushar", "Tejas", "Sanjay", "Nijesh", "Jemit", "Jay" }; var skipWhileResult = names.SkipWhile(s => s.ToLower().StartsWith("j")); //assert var expectArray=new string[] {"Tushar", "Tejas", "Sanjay", "Nijesh", "Jemit", "Jay" }; CollectionAssert.AreEqual( expectArray, skipWhileResult.ToArray()); var whereReuslt = names.Where(s => !s.ToLower().StartsWith("j")); //assert var expectArray2 = new string[] { "Tushar", "Tejas", "Sanjay", "Nijesh" }; CollectionAssert.AreEqual(expectArray2, whereReuslt.ToArray()); }
SkipWhile只是匹配一开始满足条件的元素。上面的代码一看就明白。更加请参照MSDN
SkipWhile是这样的实现的:
public static IEnumerable<TSource> SkipWhile<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate) { if (source == null) throw Error.ArgumentNull("source"); if (predicate == null) throw Error.ArgumentNull("predicate"); return SkipWhileIterator<TSource>(source, predicate); } private static IEnumerable<TSource> SkipWhileIterator<TSource>(IEnumerable<TSource> source, Func<TSource, bool> predicate) { bool iteratorVariable0 = false; foreach (TSource iteratorVariable1 in source) { if (!iteratorVariable0 && !predicate(iteratorVariable1)) iteratorVariable0 = true; if (iteratorVariable0) { yield return iteratorVariable1; } } }
希望对您开发有帮助。
作者：Petter Liu
出处：http://www.cnblogs.com/wintersun/
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。
该文章也同时发布在我的独立博客中-Petter Liu Blog。
2012年4月28日
前面的文章我们介绍了jquery.validate.unobtrusive 脚本实现Asp.net MVC3表单验证。这里我们介绍应用jquery.unobtrusive-ajax.js实现的ajax操作.首先确保的是在Web.config中配置节：
<add key="ClientValidationEnabled" value="true"/> <add key="UnobtrusiveJavaScriptEnabled" value="true"/>
我们有一个_register.cshtml的PartialView :
<script type="text/javascript"> function ReloadForm(xhr) { $('#formcontent').html(xhr.responseText); } function ClearValidationErrors() { $('.validation-summary-errors').html(''); $('.input-validation-error').removeClass('input-validation-error'); $('.field-validation-error').remove(); } </script> @using (Ajax.BeginForm("IndexPost", "Home", Model, new AjaxOptions { UpdateTargetId = "formresults", HttpMethod = "Post", OnSuccess = "ClearValidationErrors", OnFailure = "ReloadForm(xhr)" })) { @Html.ValidationSummary(true, "Account creation was unsuccessful. Please correct the errors and try again.") <div> <fieldset> <legend>Account Information</legend> <div class="editor-label"> @Html.LabelFor(m => m.UserName) </div> <div class="editor-field"> @Html.TextBoxFor(m => m.UserName) @Html.ValidationMessageFor(m => m.UserName) </div> <div class="editor-label"> @Html.LabelFor(m => m.Email) </div> <div class="editor-field"> @Html.TextBoxFor(m => m.Email) @Html.ValidationMessageFor(m => m.Email) </div> <div class="editor-label"> @Html.LabelFor(m => m.Password) </div> <div class="editor-field"> @Html.PasswordFor(m => m.Password) @Html.ValidationMessageFor(m => m.Password) </div> <div class="editor-label"> @Html.LabelFor(m => m.ConfirmPassword) </div> <div class="editor-field"> @Html.PasswordFor(m => m.ConfirmPassword) @Html.ValidationMessageFor(m => m.ConfirmPassword) </div> <p> <input type="submit" value="Register" /> </p> </fieldset> </div> }
上面的代码，我们使用了AjaxOptions，这样帮我们指定要更新UpdateTargetId，调用成功要执行的Js function，以及失败以后执行Js function. 这里当我们的ajax调用成功后我们返回一个叫”_result.cshtml”的partialView，内容是这样的:
<h2>Thanks for registering!</h2> <p>You have successfully registered</p>
在_Layout.cshtml中定义一个header节:
@if(IsSectionDefined("Header"))
{
@RenderSection("Header")
}
下面是主要用示演的Index.cshtml的内容. 你可以看到一个id叫formresults，AJAX调用成功后将会更新它:
@model AjaxTest.Models.RegisterModel @{ ViewBag.Title = "Home Page"; } @section Header { <script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script> <script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script> <script src="@Url.Content("~/Scripts/jquery.unobtrusive-ajax.min.js")" type="text/javascript"></script> } <h2>@ViewBag.Message</h2> <div id="formcontent"> @{ Html.RenderPartial("_register", Model); } </div> <div id="formresults"></div>
Controller的代码是这样的,IndexPost Action就是我们Ajax的Post 目标.
public ActionResult Index() { ViewBag.Message = "Welcome to ASP.NET MVC!"; return View(new AjaxTest.Models.RegisterModel()); } [HttpPost] public ActionResult IndexPost(AjaxTest.Models.RegisterModel model) { if (ModelState.IsValid) { return PartialView("_results"); } HttpContext.Response.StatusCode = 500; HttpContext.Response.Clear(); return PartialView("_register", model); }
Model是这样的:
public class RegisterModel { [Required] [Display(Name = "User name")] public string UserName { get; set; } [Required] [DataType(DataType.EmailAddress)] [Display(Name = "Email address")] public string Email { get; set; } [Required] [StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)] [DataType(DataType.Password)] [Display(Name = "Password")] public string Password { get; set; } [DataType(DataType.Password)] [Display(Name = "Confirm password")] [Compare("Password", ErrorMessage = "The password and confirmation password do not match.")] public string ConfirmPassword { get; set; } }
当View执行时我们看到这样的HTML，你可以看到Form 标签加上了 data-ajax,data-ajax-method等特性, 而input上data-* 用来做验证：
<form action="/Home/IndexPost" data-ajax="true" data-ajax-failure="ReloadForm(xhr)" data-ajax-method="Post" data-ajax-mode="replace" data-ajax-success="ClearValidationErrors" data-ajax-update="#formresults" id="form0" method="post"> <div> <fieldset> <legend>Account Information</legend> <div class="editor-label"> <label for="UserName">User name</label> </div> <div class="editor-field"> <input data-val="true" data-val-required="The User name field is required." id="UserName" name="UserName" type="text" value="" /> <span class="field-validation-valid" data-valmsg-for="UserName" data-valmsg-replace="true"></span> </div> <div class="editor-label"> <label for="Email">Email address</label> </div> <div class="editor-field"> <input data-val="true" data-val-required="The Email address field is required." id="Email" name="Email" type="text" value="" /> <span class="field-validation-valid" data-valmsg-for="Email" data-valmsg-replace="true"></span> </div> <div class="editor-label"> <label for="Password">Password</label> </div> <div class="editor-field"> <input data-val="true" data-val-length="The Password must be at least 6 characters long." data-val-length-max="100" data-val-length-min="6" data-val-required="The Password field is required." id="Password" name="Password" type="password" /> <span class="field-validation-valid" data-valmsg-for="Password" data-valmsg-replace="true"></span> </div> <div class="editor-label"> <label for="ConfirmPassword">Confirm password</label> </div> <div class="editor-field"> <input data-val="true" data-val-equalto="The password and confirmation password do not match." data-val-equalto-other="*.Password" id="ConfirmPassword" name="ConfirmPassword" type="password" /> <span class="field-validation-valid" data-valmsg-for="ConfirmPassword" data-valmsg-replace="true"></span> </div> <p> <input type="submit" value="Register" /> </p> </fieldset> </div> </form>
你有兴趣可以查看Asp.net MVC 3 RTM的源代码，下面是来AjaxOptions类ToUnobtrusiveHtmlAttributes方法，你可以看到data-*与表单中生成的一致。
public IDictionary<string, object> ToUnobtrusiveHtmlAttributes() { var result = new Dictionary<string, object> { { "data-ajax", "true" }, }; AddToDictionaryIfSpecified(result, "data-ajax-url", Url); AddToDictionaryIfSpecified(result, "data-ajax-method", HttpMethod); AddToDictionaryIfSpecified(result, "data-ajax-confirm", Confirm); AddToDictionaryIfSpecified(result, "data-ajax-begin", OnBegin); AddToDictionaryIfSpecified(result, "data-ajax-complete", OnComplete); AddToDictionaryIfSpecified(result, "data-ajax-failure", OnFailure); AddToDictionaryIfSpecified(result, "data-ajax-success", OnSuccess); if (!String.IsNullOrWhiteSpace(LoadingElementId)) { result.Add("data-ajax-loading", "#" + LoadingElementId); if (LoadingElementDuration > 0) { result.Add("data-ajax-loading-duration", LoadingElementDuration); } } if (!String.IsNullOrWhiteSpace(UpdateTargetId)) { result.Add("data-ajax-update", "#" + UpdateTargetId); result.Add("data-ajax-mode", InsertionModeUnobtrusive); } return result; }
希望对您开发有帮助，您可能感兴趣的文章:
HTML5中custom data-*特性与asp.net mvc 3 表单验证
Html 5中自定义data-*特性
作者：Petter Liu
出处：http://www.cnblogs.com/wintersun/
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。
该文章也同时发布在我的独立博客中-Petter Liu Blog。
2012年4月12日
前面一篇文章我们介绍了HTML5中custom data-*特性，在Asp.net MVC Web App中原来我们对表单有验证，需要写这个js与Jquery Validation 插件配合, 回顾一下，看下面的代码:
<!DOCTYPE html> <html> <head> <title>LoginWithModel</title> <script src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.5.1.min.js" type="text/javascript"></script> <script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.7/jquery.validate.pack.js" type="text/javascript"></script> </head> <body> <form action="/Security/LoginWithModel" method="post"> <table> <tr> <td> <label for="UserName">User name</label> </td> <td> <input id="UserName" name="UserName" type="text" value="" /> </td> </tr> <tr> <td> <label for="Email">Email address</label> </td> <td> <input id="Email" name="Email" type="text" value="" /> </td> </tr> <tr> <td> <label for="Password">Password</label> </td> <td> <input id="Password" name="Password" type="password" /> </td> </tr> <tr> <td> <label for="ConfirmPassword">Confirm password</label> </td> <td> <input id="ConfirmPassword" name="ConfirmPassword" type="password" /> </td> </tr> </table> <input type="submit" value="Submit" /> </form> <script src="../../Scripts/MyformValidatation.js" type="text/javascript"></script> </body> </html>
JS 通常像这样:
$(document).ready(function () { $.validator.addMethod('Email', function (value) { return /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/.test(value); }, 'Please enter correct email.'); $("form").validate({ rules: { UserName: { required: true }, Email: { required: true, Email: true }, Password: { required: true, range: [6, 12] }, ConfirmPassword: { required: true, equalTo: "#Password" } } , messages: { UserName: { required: "Please enter UserName" }, Email: { required: "Please enter Email", Email: "Please enter corret email" }, Password: { required: "Please enter Password", range: "must be at least 6 characters long." }, ConfirmPassword: { required: "Please enter confirm password." } } , wrapper: "p", errorPlacement: function (error, element) { if (error != null) { error.insertAfter(element); } } }) });
<add key="ClientValidationEnabled" value="true"/> <add key="UnobtrusiveJavaScriptEnabled" value="true"/>
View, 先引用jquery.validate.unobtrusive.min.js,接着是这样的：
@model Mvc3App.Models.RegisterModel @{ Layout = null; } <!DOCTYPE html> <html> <head> <title>LoginWithModel</title> <script src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.5.1.min.js" type="text/javascript"></script> <script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.7/jquery.validate.pack.js" type="text/javascript"></script> <script src="http://ajax.aspnetcdn.com/ajax/mvc/3.0/jquery.validate.unobtrusive.min.js" type="text/javascript"></script> </head> <body> @Html.ValidationSummary("Errors have occurred:") @using (Html.BeginForm()) { <table> <tr> <td> @Html.LabelFor(m => m.UserName) </td> <td> @Html.TextBoxFor(i => i.UserName) @Html.ValidationMessageFor(i => i.UserName) </td> </tr> <tr> <td> @Html.LabelFor(m => m.Email) </td> <td> @Html.TextBoxFor(i => i.Email) @Html.ValidationMessageFor(i => i.Email) </td> </tr> <tr> <td> @Html.LabelFor(m => m.Password) </td> <td> @Html.PasswordFor(i => i.Password) @Html.ValidationMessageFor(i => i.Password) </td> </tr> <tr> <td> @Html.LabelFor(m => m.ConfirmPassword) </td> <td> @Html.PasswordFor(i => i.ConfirmPassword) @Html.ValidationMessageFor(i => i.ConfirmPassword) </td> </tr> </table> <input type="submit" value="Submit" /> } </body> </html>
Model类, 注意上面使用是System.ComponentModel.DataAnnotations特性。
public class RegisterModel { [Required] [Display(Name = "User name")] [RegularExpression("^[A-Za-z0-9]+$",ErrorMessage="Please correct format user name.")] public string UserName { get; set; } [Required] [DataType(DataType.EmailAddress)] [Display(Name = "Email address")] [RegularExpression(@"^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$", ErrorMessage = "Please correct format Email.")] public string Email { get; set; } [Required] [StringLength(12, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)] [DataType(DataType.Password)] [Display(Name = "Password")] public string Password { get; set; } [DataType(DataType.Password)] [Display(Name = "Confirm password")] [Compare("Password", ErrorMessage = "The password and confirmation password do not match.")] public string ConfirmPassword { get; set; } }
这时最后render出来html，你有看到那些验证规则都出来了:
<!DOCTYPE html> <html> <head> <title>LoginWithModel</title> <script src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.5.1.min.js" type="text/javascript"></script> <script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.7/jquery.validate.pack.js" type="text/javascript"></script> <script src="http://ajax.aspnetcdn.com/ajax/mvc/3.0/jquery.validate.unobtrusive.min.js" type="text/javascript"></script> </head> <body> <form action="/Security/LoginWithModel" method="post"> <table> <tr> <td> <label for="UserName">User name</label> </td> <td> <input data-val="true" data-val-regex="Please correct format user name." data-val-regex-pattern="^[A-Za-z0-9]+$" data-val-required="The User name field is required." id="UserName" name="UserName" type="text" value="" /> <span class="field-validation-valid" data-valmsg-for="UserName" data-valmsg-replace="true"></span> </td> </tr> <tr> <td> <label for="Email">Email address</label> </td> <td> <input data-val="true" data-val-regex="Please correct format Email." data-val-regex-pattern="^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$" data-val-required="The Email address field is required." id="Email" name="Email" type="text" value="" /> <span class="field-validation-valid" data-valmsg-for="Email" data-valmsg-replace="true"></span> </td> </tr> <tr> <td> <label for="Password">Password</label> </td> <td> <input data-val="true" data-val-length="The Password must be at least 6 characters long." data-val-length-max="12" data-val-length-min="6" data-val-required="The Password field is required." id="Password" name="Password" type="password" /> <span class="field-validation-valid" data-valmsg-for="Password" data-valmsg-replace="true"></span> </td> </tr> <tr> <td> <label for="ConfirmPassword">Confirm password</label> </td> <td> <input data-val="true" data-val-equalto="The password and confirmation password do not match." data-val-equalto-other="*.Password" id="ConfirmPassword" name="ConfirmPassword" type="password" /> <span class="field-validation-valid" data-valmsg-for="ConfirmPassword" data-valmsg-replace="true"></span> </td> </tr> </table> <input type="submit" value="Submit" /> </form> </body> </html>有注意到上面的html中，有加入相应data-*特性。这就是ASP.NET MVC 3 特性之一，注意这里必须使用BeginForm才能生成它们。最后我们能实现相同的验证效果，而我们不需要单独写JS了。别需要注意是，如果引入jquery.validate.unobtrusive相关js, 再其它地方使用 $("form").validate() 时，则不会生效。原因是jquery.validate.unobtrusive提前注册validate方法，它会与你自已定义冲突.
<!DOCTYPE html> <html> <head> <title>jQuery Validate Unobtrusive demo</title> <script src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.6.2.js" type="text/javascript"></script> <script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.8.1/jquery.validate.js" type="text/javascript"></script> <script src="http://ajax.aspnetcdn.com/ajax/mvc/3.0/jquery.validate.unobtrusive.js" type="text/javascript"></script> <style type="text/css"> body, input { font-size: 9pt; } .input-validation-error { border: 1px solid #ff0000; } .input-validation-valid { border: 1px solid #00ff00; } .field-validation-error { color: #ff0000; } .field-validation-valid { display: none; } .validation-summary-errors { font-weight: bold; color: #ff0000; } .validation-summary-valid { display: none; } </style> </head> <body> <form id="form1" method="get"> <div data-valmsg-summary="true"> <ul> </ul> </div> <div> <input type="text" id="tReq" name="tReq" data-val="true" data-val-required="requried" /> <span data-valmsg-for="tReq"></span> </div> <div> <input type="text" id="tAccept" name="tAccept" value="a.doc" data-val="true" data-val-accept="name must be .jpg、.gif or .png" data-val-accept-exts="jpg|gif|png" /> <span data-valmsg-for="tAccept"></span> </div> <div> <input type="text" id="tRegex" name="tRegex" value="123-ABC@" data-val="true" data-val-regex="Format as 999-999" data-val-regex-pattern="[0-9A-Z]{3}-[0-9A-Z]{3}" /> <span data-valmsg-for="tRegex"></span> </div> <div> <input type="text" id="tDigit" name="tDigit" value="-1234" data-val="true" data-val-digits="should be digital" /> <span data-valmsg-for="tDigit"></span> </div> <div> <input type="text" id="tNum" name="tNum" value="-1,234.56A" data-val="true" data-val-number="should be number" /> <span data-valmsg-for="tNum"></span> </div> <div> <input type="text" id="tDate" name="tDate" value="X/01/X2000" data-val="true" data-val-date="should be digital Date" /> <span data-valmsg-for="tDate"></span> </div> <div> <input type="text" id="tEmail" name="tEmail" value="jeffrey @mail.com" data-val="true" data-val-email="should be Email" /> <span data-valmsg-for="tEmail"></span> </div> <div> <input type="text" id="tUrl" name="tUrl" value="http:// blog.darkthread.net" data-val="true" data-val-url="should be url" /> <span data-valmsg-for="tUrl"></span> </div> <div> <input type="text" id="tLen" name="tLen" value="TTT" data-val="true" data-val-length="Length from 4 to 8" data-val-length-min="4" data-val-length-max="8" /> <span data-valmsg-for="tLen"></span> </div> <div> <input type="text" id="tRange" name="tRange" value="5" data-val="true" data-val-range="range from 10 to100" data-val-range-min="10" data-val-range-max="100" /> <span data-valmsg-for="tRange"></span> </div> <div> <input type="text" id="tEq" name="tEq" value="99" data-val="true" data-val-equalto="same as above value" data-val-equalto-other="tRange" /> <span data-valmsg-for="tEq"></span> </div> <div> <input type="submit" id="send" value="Send" /> </form> </body> </html> Asp.net MVC 3 中 Unobtrusive JavaScript， 简化我们Web开发，提高了开发效率。
希望对您Web开发有帮助。
您可能感兴趣的文章:Html 5中自定义data-*特性
Asp.net MVC中表单验证
作者：Petter Liu
出处：http://www.cnblogs.com/wintersun/
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。
该文章也同时发布在我的独立博客中-Petter Liu Blog。
2012年4月9日
Html 5中支持用户自定义的data-*特性，它们在UI是不可见的。例如data-length,它可以附加在input的标签上。更加具体信息可参考W3C Html 5 data-说明书
有这么一段描述:
Custom data attributes are intended to store custom data private to the page or application, for which there are no more appropriate attributes or elements.
接下来我们就可以实现这样一个简单例子:
<!DOCTYPE html> <html> <head> <title>Html5 custom data attribute Test</title> </head> <body > <li class="user" data-name="Peter Liu" data-city="ShangHai" data-lang="CSharp" data-food="apple"> <b>Peter says:</b> <span>Hello, how are you?</span> </li> <script type="text/javascript"> var user = document.getElementsByTagName("li")[0]; var pos = 0, span = user.getElementsByTagName("span")[0]; var phrases = [ { name: "city", prefix: "I am from " }, { name: "food", prefix: "I like to eat " }, { name: "lang", prefix: "I like to program in " } ]; user.addEventListener("click", function () { var phrase = phrases[pos++]; // Use the .dataset property span.innerHTML = phrase.prefix + user.dataset[phrase.name]; }, false); </script> </body> </html>
上面的li标签中嵌入一些data-*特性，当你点击那个span，读取了每个data-*的value, 最后实现一个切换文字效果。你有注意到上面js中有用到一个dataset属性。W3C官方也是有关于dataset的介绍。上面的代码测试通过在 Firefox 11.0, Chrome 18.0.1025.151
注意这个在IE9是不支持的。 IE9 需要改写为getAttribute
<!DOCTYPE html> <html> <head> <title>Html5 custom data attribute Test</title> </head> <body > <li class="user" data-name="Peter Liu" data-city="ShangHai" data-lang="CSharp" data-food="apple"> <b>Peter says:</b> <span>Hello, how are you?</span> </li> <script type="text/javascript"> var user = document.getElementsByTagName("li")[0]; var pos = 0, span = user.getElementsByTagName("span")[0]; var phrases = [ { name: "city", prefix: "I am from " }, { name: "food", prefix: "I like to eat " }, { name: "lang", prefix: "I like to program in " } ]; user.addEventListener("click", function () { var phrase = phrases[pos++]; // Use the .dataset property span.innerHTML = phrase.prefix + user.getAttribute('data-'+phrase.name); }, false); </script> </body> </html>
上面的代码在IE 9.0.8112测试通过。您也可以在IE, FF中单步调试js看其中结果
希望对您Web开发有帮助。
您可能感兴趣的文章:
作者：Petter Liu
出处：http://www.cnblogs.com/wintersun/
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。
该文章也同时发布在我的独立博客中-Petter Liu Blog。
2012年4月3日
Asp.net MVC 应用程序中经常使用ajax操作，一般都是一些action。我们来实现个特性标记当前某个action只支持处理ajax的http请求。 下面直接看代码
/// <summary> /// AjaxOnlyAttribute /// </summary> public class AjaxOnlyAttribute : ActionFilterAttribute { /// <summary> /// Called by the ASP.NET MVC framework before the action method executes. /// </summary> /// <param name="filterContext">The filter context.</param> public override void OnActionExecuting(ActionExecutingContext filterContext) { if (!filterContext.HttpContext.Request.IsAjaxRequest()) { filterContext.Result = new HttpNotFoundResult(); } base.OnActionExecuting(filterContext); } }
这里让它返回一个特别的HttpNotFoundResult, 以确保代码可读性:
/// <summary> /// HttpNotFoundResult /// </summary> public class HttpNotFoundResult : ActionResult { /// <summary> /// Enables processing of the result of an action method by a custom type that inherits from the <see cref="T:System.Web.Mvc.ActionResult"/> class. /// </summary> /// <param name="context">The context in which the result is executed. The context information includes the controller, HTTP content, request context, and route data.</param> public override void ExecuteResult(ControllerContext context) { if (context == null) { throw new ArgumentNullException("Context"); } context.HttpContext.Response.StatusCode = 401; } }
在Action标记像这样:
[AjaxOnly] public ActionResult LogOff() { FormsAuthentication.SignOut(); return RedirectToAction("Index", "Home"); }
如何工作的看Unit Test，分别包括了Ajax请求与非Ajax请求的场景.
[TestMethod] public void Test_AjaxOnlyAttributeWithAjaxRequest() { //arrange var header = new System.Collections.Specialized.NameValueCollection(); header.Add("X-Requested-With", "XMLHttpRequest"); var mockRequest = new Mock<HttpRequestBase>(); mockRequest.SetupGet(http => http.Headers).Returns(header); var mockFiltercontext = new Mock<ActionExecutingContext>(); mockFiltercontext.SetupGet(fc => fc.HttpContext.Request).Returns(mockRequest.Object); //act var ajaxAttribute = new AjaxOnlyAttribute(); var filterContext = mockFiltercontext.Object; ajaxAttribute.OnActionExecuting(filterContext); //verify mockRequest.VerifyAll(); //assert Assert.IsTrue(filterContext.HttpContext.Request.IsAjaxRequest()); var httpNotFoundResult = filterContext.Result as Mvc3App.Extention.Attribute.HttpNotFoundResult; Assert.IsNull(httpNotFoundResult); } [TestMethod] public void Test_AjaxOnlyAttributeWithNonAjaxRequest() { //arrange var header = new System.Collections.Specialized.NameValueCollection(); var mockRequest = new Mock<HttpRequestBase>(); mockRequest.SetupGet(http => http.Headers).Returns(header); var mockFiltercontext = new Mock<ActionExecutingContext>(); mockFiltercontext.SetupGet(fc => fc.HttpContext.Request).Returns(mockRequest.Object); var controllerContext = new ControllerContext { RequestContext = new RequestContext(new MockHttpContext(), new RouteData()), HttpContext = new MockHttpContext() }; //act var ajaxAttribute = new AjaxOnlyAttribute(); var filterContext = mockFiltercontext.Object; ajaxAttribute.OnActionExecuting(filterContext); //verify mockRequest.VerifyAll(); //assert Assert.IsFalse(filterContext.HttpContext.Request.IsAjaxRequest()); var httpNotFoundResult = filterContext.Result as Mvc3App.Extention.Attribute.HttpNotFoundResult; Assert.IsNotNull(httpNotFoundResult); httpNotFoundResult.ExecuteResult(controllerContext); Assert.AreEqual(controllerContext.HttpContext.Response.StatusCode, 401); }
MockHttpContext是一个用于Unit Test的类型，由于篇幅有限，这里不讲了。
希望对您Web开发有帮助。
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Asp.net MVC3扩展之Ajax异常处理特性
作者：Petter Liu
出处：http://www.cnblogs.com/wintersun/
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。
该文章也同时发布在我的独立博客中-Petter Liu Blog。
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