c# asp.net ajax 用法一例

 

c# asp.net ajax 用法一例

<%@ Page Language="C#" AutoEventWireup="true" ...%>

<script type="text/javascript">

        //Ajax Asp.net 2.0方法        

        //---------------eg2 begin

        function ReceiveServerData1(arg, context) {

            document.form1.Text1.value = arg;

           //document.getElementById('Text1').value=arg;

        }

        var tmp = 0;

        function ReceiveServerData2(arg, context) {

            Message1.innerText = arg;

            tmp = arg;

        }

        function ProcessCallBackError(arg, context) {

        }

        //---------------eg2 end

</script> 

 

 

<div>

        输入:<input id="Text1" type="text" value="8" />

        <input id="Button2" type="button" value="点击" onclick="CallTheServer1(Text1.value,null)"/>

</div>

        <p></p>

        <p></p>

        <p>

         演示:<span id="Message1">0 &nbsp; &nbsp; &nbsp;&nbsp;</span>

         <input id="Button3" type="button" value="点击" onclick="CallTheServer2(tmp,null)" />

        </p> 

 

 

class Weather_WeatherComCn : System.Web.UI.Page, ICallbackEventHandler

{

    protected void Page_Load(object sender, EventArgs e)

    {

        //Ajax Asp.net 2.0方法       

 

        //---------------------

        ClientScriptManager cs = Page.ClientScript;

        StringBuilder context1 = new StringBuilder();

        context1.Append("function ReceiveServerData1(arg, context)");

        context1.Append("{");        

        context1.Append(" document.getElementById('Text1').value=arg;");

        context1.Append("");

        context1.Append("}");

        String cbReference1 = cs.GetCallbackEventReference("'" + Page.UniqueID + "'", "arg", "ReceiveServerData1", "", "ProcessCallBackError", false);

        String callbackScript1 = "function CallTheServer1(arg, context) {" +cbReference1 + "; }";

 

        cs.RegisterClientScriptBlock(this.GetType(), "CallTheServer1", callbackScript1, true);

        //function CallTheServer2(arg, context)

        // {WebForm_DoCallback('__Page',arg,ReceiveServerData2,/"/",ProcessCallBackError,false);

        String cbReference2 = cs.GetCallbackEventReference("'" +Page.UniqueID + "'", "arg", "ReceiveServerData2", "","ProcessCallBackError", false);

        String callbackScript2 = "function CallTheServer2(arg, context) {" +cbReference2 + "; }";

        cs.RegisterClientScriptBlock(this.GetType(), "CallTheServer2", callbackScript2, true);

 

        //---------------------

        if (!IsPostBack)

        {

 

        }

    }

    #region ICallbackEventHandler 成员    

    public int cbCount = 0;

    public string GetCallbackResult()

    {

        //Response.Write(cbCount.ToString());

        return cbCount.ToString();

    }

    public void RaiseCallbackEvent(String eventArgument)

    {

        cbCount = Convert.ToInt32(eventArgument) + 1;

    }

    #endregion

}