Ajax在.NET中与Server控件的交互

19 SqlCommand cmd = new SqlCommand("select * from ajaxTable order by id", conn);

20 SqlDataAdapter ap = new SqlDataAdapter( cmd );

21 DataSet ds = new DataSet();

22 ap.SelectCommand.Connection.Open();

23 ap.Fill( ds, "db" );

24

25 conn.Dispose();

26 cmd.Dispose();

27

28 //实例化一个datagird类并设置好数据源

29 DataGrid dg = new DataGrid();

30 dg.DataSource = ds.Tables["db"];

31 dg.DataBind();

32

33 //实例化一个HtmlTextWriter的类

34 System.Text.StringBuilder strb = new System.Text.StringBuilder();

35 System.IO.StringWriter sw = new System.IO.StringWriter( strb );

36 System.Web.UI.HtmlTextWriter htw = new HtmlTextWriter( sw );

37

38 //执行控件的render并输出到HtmlTextWriter里

39 dg.RenderControl( htw );

40

41 string s = strb.ToString();

42

43 return s;//最后就是返回这个html啦

44 }

5.然后再建一个default.js文件，用作存放 js方法

function AddAjax(name)

{

DemoMethods.AddAjaxTable(name);

LoadGrid();

}

function LoadGrid()

{

var cc=document.getElementById("UCtd");

cc.innerHTML=DemoMethods.GetAjaxTable().value;

}

6.建一个default.aspx，在pageload事件里面加个注册的东西

private void Page_Load(object sender, System.EventArgs e)

{

Ajax.Utility.RegisterTypeForAjax(typeof(AjaxTestPrjLib.DemoMethods));

}

7.最后就是default.aspx的html和js了。

＜%@ Page language="c#" Codebehind="default.aspx.cs" AutoEventWireup="false" Inherits="AjaxTextPrjWeb._default" %＞