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的.net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＞
＜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";
}
{
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 }
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 }
