aspnet回调技术callback学习笔记

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1、Asp.net回调技术Callback学习笔记.aspx:001It;0/oPageLanguage=〃C#〃AutoEventWireup=〃true〃CodeFile=〃Default.aspx.cs〃Inherits=〃_Default〃％gt;0020031t;!DOCTYPEhtmlPUBLIC〃-//W3C//DTDXHTML1.OTransitional//EN〃〃http://www.w3•org/TR/xhtmll/DTD/xhtmil-transitional.dtd〃gt;0041t;htmlxmlns="http://www.w3.org/19

2、99/xhtml"gt;0051t;headrunat=〃server〃gt;0061t;titlegt;无标题页It;/titlegt;0070081t:scripttype=〃text/javascript〃gt;009010//向服务器传递参数01lfunctionDoSearch(){012varfirstName=document.getElementByld(Z/TextBoxl〃)•value;013CalIServer(firstName,;015016//得到服务器的数据017functionReceiveServerData(txtUserlnfo

3、){018Results.innerHTML=txtUserlnfo;019}020021//设置每1秒执行一次O22setlnterval("DoSearch()"，1000):0231t;/scriptgt;0240251t;/headgt;0261t;bodygt;0271t;formid="forml//runat="server//gt;0281t:divgt;029姓名：lt;asp:TextBoxID="TextBoxl"runat="server〃gt;It;/asp:TextBoxgt;0301t;br/gt;0311t;spanid=//Resul

4、tsz，style="width:500px;z/gt;It;/spangt;032It;/divgt;0331t;/formgt:0341t;/bodygt;0351t;/htmlgt;036[/code]037.aspx.cs038[code]039usingSystem;040usingSystem.Collections;041usingSystem.Configuration;042usingSystem.Data;043usingSystem.Web;044usingSystem.Web.Security;045usingSystem.Web.UI:046

5、usingSystem.Web.UI.HtmlControls:047usingSystem.Web.UI.WebControls;048usingSystem.Web.UI.WebControls.WebParts;049usingSystem.Data.SqlClient;05005lpublicpartialclass_Default:System.Web.UI.Page，ICallbackEventHandler052{053protectedstringtxtUserInfo;056protectedvoidPage_Load(objectsender,Ev

6、entArgse)057{058//获取一个对客户端函数的引用059stringcbReference=Page.ClientScript.GetCalIbackEventReference(this，"arg'"ReceiveServerData'"context");060//动态注册回调函数061stringcallbackScript=//functionCallServer(arg，context)”七”{/z+cbReference+z/};";062//引发callbackScript063Page.ClientScript.RegisterStartu

7、pScript(this.GetType()，"CallServer"，callbackScript，true):064}065066//引发Callback事件处理067publicvoidRaiseCallbackEvent(stringtxtFirstName)068{069if(txtFirstName!=null)071StringconnString=System.Configuration.ConfigurationManager.Connectionstrings[〃sqlserverXX〃LToStringO:072073SqlCo