2012-01-16 19:58:58|?次阅读|上传:wustguangh【已有?条评论】发表评论
关键词:C#, Web, JQuery|来源:唯设编程网
开发环境: Visual Studio 2005 SP1
部署环境:Windows Server 2008 r2 + IIS 7
1.新建数据源项目CrossDomain
主要文件如下:
1.Handler.ashx 作为jquery跨域请求*.handler的响应,代码如下:
using System; using System.Collections.Generic; using System.Web; using System.Web.Services; namespace CrossDomain { /// <summary> /// $codebehindclassname$ 的摘要说明 /// </summary> [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] public class Handler : IHttpHandler { public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/plain"; string callbackMethodName = context.Request.Params["jsoncallback"]; string currentCity = context.Request["city"]; currentCity = string.IsNullOrEmpty(currentCity) ? "北京" : "沈阳"; string result = callbackMethodName + "({/"city/":" + "/"" + currentCity + "/", /"dateTime/":" + "/"" + DateTime.Now + "/"});"; context.Response.Write(result); } public bool IsReusable { get { return false; } } } }
2.WebService.asmx 作为jquery跨域请求WebService的响应,代码如下:
using System; using System.Collections.Generic; using System.Web; using System.Web.Services; namespace CrossDomain { /// <summary> /// WebService 的摘要说明 /// </summary> [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [System.ComponentModel.ToolboxItem(false)] public class WebService : System.Web.Services.WebService { [WebMethod] public void HelloWorld(string city) { string callbackMethodName = HttpContext.Current.Request.Params["jsoncallback"] ?? ""; city = string.IsNullOrEmpty(city) ? "北京" : "沈阳"; string result = callbackMethodName + "({/"city/":" + "/"" + city + "/", /"dateTime/":" + "/"" + DateTime.Now + "/"});"; HttpContext.Current.Response.Write(result); HttpContext.Current.Response.End(); } [WebMethod] public void ws(string name, string time) { HttpRequest Request = HttpContext.Current.Request; string callback = Request["callback"]; HttpResponse Response = HttpContext.Current.Response; Response.Write(callback + "({msg:'this is" + name + "jsonp'})"); Response.End(); } } }
3.Web.config 需要修改web.config文件,注意webServices 节(这是请求webservice获取数据的关键) 具体如下:
<?xml version="1.0" encoding="utf-8"?> <configuration> <appSettings/> <connectionStrings/> <system.web> <!-- 设置 compilation debug="true" 可将调试符号插入 已编译的页面中。但由于这会 影响性能,因此只在开发过程中将此值 设置为 true。 --> <compilation debug="false"> </compilation> <!-- 通过 <authentication> 节可以配置 ASP.NET 用来 识别进入用户的 安全身份验证模式。 --> <authentication mode="Windows" /> <!-- 如果在执行请求的过程中出现未处理的错误, 则通过 <customErrors> 节可以配置相应的处理步骤。具体说来, 开发人员通过该节可以配置 要显示的 html 错误页 以代替错误堆栈跟踪。 <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm"> <error statusCode="403" redirect="NoAccess.htm" /> <error statusCode="404" redirect="FileNotFound.htm" /> </customErrors> --> <webServices> <protocols> <add name="HttpGet"/> <add name="HttpPost"/> </protocols> </webServices> </system.web> </configuration>
2.新建跨域请求测试项目CrossDomainRequestTest
主要文件如下:
1.CrossDomainRequestHandler.htm 跨域请求*.handler获取josn格式数据测试页,代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <title></title> <mce:script type="text/javascript" language="javascript" src="js/jquery-1.4.4.js" mce_src="js/jquery-1.4.4.js"></mce:script> <mce:script type="text/javascript" language="javascript" src="js/jquery-1.4.4.js" mce_src="js/jquery-1.4.4.js"></mce:script> <mce:script type="text/javascript" language="javascript"><!-- $(document).ready(function() { // var clientUrl = "http://localhost:4508/Handler.ashx?jsoncallback=jsonp1326710971952"; var clientUrl = "http://192.168.120.179:8086/Handler.ashx?jsoncallback=jsonp1326714211254" var currentCity = "哈尔滨"; $.ajax({ url: clientUrl, dataType: "jsonp", data : {city : currentCity}, success : OnSuccess, error : OnError }); }); function OnSuccess(json) { $("#data").html("城市:" + json.city + ",时间:" + json.dateTime); } function OnError(XMLHttpRequest, textStatus, errorThrown) { targetDiv = $("#data"); if (errorThrown || textStatus == "error" || textStatus == "parsererror" || textStatus == "notmodified") { targetDiv.replaceWith("请求数据时发生错误!"); return; } if (textStatus == "timeout") { targetDiv.replaceWith("请求数据超时!"); return; } } // --></mce:script> </head> <body> <div id="data"></div> </body> </html>
2.CrossDomainRequestWebService.htm 跨域请求WebService *.asmx 获取josn格式数据测试页,代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <title></title> <mce:script type="text/javascript" language="javascript" src="js/jquery-1.4.4.js" mce_src="js/jquery-1.4.4.js"></mce:script> <mce:script type="text/javascript" language="javascript"><!-- $(document).ready(function() { // var clientUrl = "http://localhost:4508/WebService.asmx/HelloWorld?jsoncallback=jsonp1326714246476"; var clientUrl = "http://192.168.120.179:8086/WebService.asmx/HelloWorld?jsoncallback=jsonp1326714290151"; var currentCity = "哈尔滨"; $.getJSON( clientUrl, { city: currentCity }, function(json) { $("#data").html("城市:" + json.city + ",时间:" + json.dateTime); } ); }); function OnSuccess(responseData) { $("#data").html(responseData.city); } function OnError(XMLHttpRequest, textStatus, errorThrown) { targetDiv = $("#data"); if (errorThrown || textStatus == "error" || textStatus == "parsererror" || textStatus == "notmodified") { targetDiv.replaceWith("请求数据时发生错误!"); return; } if (textStatus == "timeout") { targetDiv.replaceWith("请求数据超时!"); return; } } // --></mce:script> </head> <body> <div id="data"></div> </body> </html>
3.结果: