ajax.net中与server控件的交互使用（一）
前两天在网上下了个ajax组件体验了一下，感觉很不错。但后来开始想怎样能让它跟server控件交互呢，例如我上输出一个列表，就只有用js一条一条html的输出吗？不！！现在我说说怎样与 datagrid交互。
注：ajax.net的组件可以到此网下载，我用的是for .net 1.1版本的。http://ajax.schwarz-interactive.de/
1. 在引用中添加引用Ajax.dll。（这个很废话）
2.在web.config中建立HttpHandler（这个当然是在system.web串里的）
<httpHandlers> <add verb="POST,GET" path="ajax/*.ashx" type="Ajax.PageHandlerFactory, Ajax" /></httpHandlers> 3.在Global的Application_Start里加上个设置
protected void Application_Start(Object sender, EventArgs e)
{
Ajax.Utility.HandlerPath = "ajax";
}4.新建一个类DemoMethods，这个类里面提供了更新数据库和输出列表的方法。其实主要思想就是获得控件运行后生成的html，然后输出。
1 [Ajax.AjaxMethod]
2 public int AddAjaxTable(string name)
3 {
4 //输入一个字符串，然后更新
5 SqlConnection conn = new SqlConnection( System.Configuration.ConfigurationSettings.AppSettings["connectionString"] );
6 SqlCommand cmd = new SqlCommand("insert into ajaxTable(name) values('"+name+"')", conn);
7 cmd.Connection.Open();
8 int result = cmd.ExecuteNonQuery();
9 conn.Dispose();
10 cmd.Dispose();
11 return result;
12 }
13
14 [Ajax.AjaxMethod]
15 public string GetAjaxTable()
16 {
17 //这个方法就是拿到datagrid生成出来的html
18 SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["connectionString"]);
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 }
[Ajax.AjaxMethod]2
public int AddAjaxTable(string name)3
{4
//输入一个字符串，然后更新5
SqlConnection conn = new SqlConnection( System.Configuration.ConfigurationSettings.AppSettings["connectionString"] );6
SqlCommand cmd = new SqlCommand("insert into ajaxTable(name) values('"+name+"')", conn);7
cmd.Connection.Open();8
int result = cmd.ExecuteNonQuery();9
conn.Dispose();10
cmd.Dispose();11
return result;12
}13
14
[Ajax.AjaxMethod]15
public string GetAjaxTable()16
{17
//这个方法就是拿到datagrid生成出来的html18
SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["connectionString"]);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，呵呵
<%@ Page language="c#" Codebehind="default.aspx.cs" AutoEventWireup="false" Inherits="AjaxTextPrjWeb._default" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ><HTML> <HEAD> <title>default</title> <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1"> <meta name="CODE_LANGUAGE" Content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> <script language="javascript" src="default.js"></script> </HEAD> <body onload="LoadGrid()"> <form id="Form1" method="post" runat="server"> <INPUT type="text" id="AddTextBox" maxlength="10"><INPUT type="button" value="添加" onclick="javascript:AddAjax(form.AddTextBox.value);"> <table> <tr> <td id="UCtd"></td> </tr> </table> </form> </body></HTML>这样，就能使用datagrid来输出表格了，呵呵。总体思路其实还是比较简单的，日后有兄弟做出更好的，请贴出来，而我也会继续努力的。谢谢....继续工作去....
