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.net2003 使用 Ajax.dll 小结

分类： WINDOWS

2007-05-18 21:00:33

重要补充:
重要补充:
Ajax.dll 和 AjaxPro.dll 是两家不同的产品, 但用法很类似, 对于.net 1.1 和.net 2.0
需要不同的dll支持!!
Ajax.dll 官网: 
AjaxPro.dll 官网: 
两者使用比较: ajax两组件之对比(ajax.dll,ajaxpro.dll) http://blog.csdn.net/nicewon/archive/2007/04/06/1554460.aspx

最近由于任务需要不得不重新接触.net2003 但是要使用到javascript，而又感觉.net代码很乱，不好跟JS交互，所以使用了Ajax.dll来帮助简化，以下是简单的总结，希望对大家有用!

简单流程：

测试环境：
XP + .Net 2003 + Ajax.dll 5.7.22.2


1> .net项目添加引用 Ajax.dll
2> 在 web.config 文件里按如下格式添加配置：
（说明：这里是指定一个虚拟路径以动态给出js文件下载地址）
<configuration>
  <system.web>
    <httpHandlers>
    <add verb="POST,GET" path="ajax/*.ashx" type="Ajax.PageHandlerFactory, Ajax" />
    </httpHandlers>  
    ...
  <system.web>
</configuration>

3> 在一个类（任意类）里实现一个Ajax方法：
using System;

namespace zhAjax{
  public class AjaxTest{
    public AjaxTest(){}
    [Ajax.AjaxMethod]//Ajax方法
    public int sum(int a, int b){
      return a+b;
    }
  }
}

4> 在一个aspx页面的codebehind代码中的Page_Load()方法中加入如下代码：
private void Page_Load(object sender, System.EventArgs e){
    //在当前页面中注册服务器端的Ajax方法，注册的类是zhAjax.AjaxTest
    //其中zhAjax是命名空间，AjaxTest是类名。
  Ajax.Utility.RegisterTypeForAjax(typeof(zhAjax.AjaxTest));
}

5> 在aspx页面里包含自己用到的JS文件，两个内容如下：
aspx文件： 
<%@ Page language="c#" Codebehind="Z.aspx.cs" AutoEventWireup="false" Inherits="zhAjax.WebForm2" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML> <HEAD>
  <title>WebForm2</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="">
  <script type=text/javascript language=javascript src='js.js' ></script>
  <!-- 注意：自己引入的JS标签一定要有单独的结尾标签</script>，否则将会出现
ajax_request为定义的现象，应为IE6将其其后的html都当作javascript了, 
同时要注意自己的Javascript不要出现任何错误 -->
</HEAD>
 <body MS_POSITIONING="GridLayout">
  <form id="Form1" method="post" runat="server">
   A: <input id=a size=15 ><br >
   B: <input id=b size=15 ><br >
   SUM: <input id=sum size=15 ><br >
   <input type=button value='计算' onclick="myFunc()" ><br >
  </form>
 <script type="text/javascript" src="/js/jquery.qqFace.js"></script>
</body>

</HTML>
js文件：js.js
function myFunc(){
 AjaxTest.sum(
  document.getElementById("a").value,
  document.getElementById("b").value,
  callback
 );
}
function callback(ret){
 document.getElementById("sum").value = ret.value;
}

为了方便学习，顺便把官网给的例子中的关键源程序贴出来以方便学习：
Methods.CS

using System;
using System.Web;
namespace CSharpSample
{
 /// <summary>
 /// Summary description for Methods.
 /// </summary>
 public class DemoMethods
 {
  [Ajax.AjaxMethod]
  public static string Test1(string firstName, string familyName, string email, string comment)
  {
   return "Hello " + firstName + " " + familyName + "<br>Thank you for your comment (" 
+ DateTime.Now.ToString() + "):<br><b>" + System.Web.HttpUtility.HtmlEncode(comment).Replace("\r", "<br>") + "</b>.";
  }
  [Ajax.AjaxMethod]
  public string Test2(DateTime d)
  {
   d = d.AddDays(1);
   return "The next day will be " + d.ToLongDateString() + ".";
  }
  [Ajax.AjaxMethod]
  public System.Data.DataSet Test3()
  {
   System.Data.DataSet ds = new System.Data.DataSet();
   System.Data.DataTable dt = new System.Data.DataTable();
   dt.Columns.Add("Country", typeof(System.String));
   ds.Tables.Add(dt);
   System.Data.DataRow row;
   
   // fill sample data (i.e. can be replaced with database query)
   
   row = ds.Tables[0].NewRow();
   row["Country"] = "Germany";
   dt.Rows.Add(row);
   row = ds.Tables[0].NewRow();
   row["Country"] = "Austria";
   dt.Rows.Add(row);
   row = ds.Tables[0].NewRow();
   row["Country"] = "Switzerland";
   dt.Rows.Add(row);
   row = ds.Tables[0].NewRow();
   row["Country"] = "France";
   dt.Rows.Add(row);
   row = ds.Tables[0].NewRow();
   row["Country"] = "Bavaria  ;)";
   dt.Rows.Add(row);

   return ds;
  }
  [Ajax.AjaxMethod]
  public void Test4()
  {
   throw new System.Security.SecurityException("This user does not have access rights on this resource.");
  }
  [Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.ReadWrite)]
  public void Test5(string value)
  {
   HttpContext.Current.Session["test"] = value;
  }
  [Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.Read)]
  public string Test6()
  {
   if(HttpContext.Current.Session["test"] != null)
    return (string)HttpContext.Current.Session["test"];
   return "First set the value...";
  }
  
  [Ajax.AjaxMethod]
  public void Test7()
  {
   int c = 0;
   
   do
   {
    System.Threading.Thread.Sleep(1000);
    c++;
   }
   while(c < 10);
  }

  [Ajax.AjaxMethod]
  public int Test8()
  {
   Random r = new Random(System.DateTime.Now.Second);
   return r.Next(0, 100);
  }

  [Ajax.AjaxMethod]
  public System.Collections.Specialized.StringCollection Test9()
  {
   System.Collections.Specialized.StringCollection s = new System.Collections.Specialized.StringCollection();
   s.Add("Michael");
   s.Add("Hans");
   return s;
  }
  [Ajax.AjaxMethod]
  public object[] Test10()
  {
   object[] o = new object[3];
   o[0] = "Michael";
   o[1] = DateTime.Now;
   o[2] = true;
   return o;
  }
  [Ajax.AjaxMethod]
  public System.Collections.ArrayList Test11()
  {
   System.Collections.ArrayList a = new System.Collections.ArrayList();
   a.Add("Michael");
   a.Add(DateTime.Now);
   a.Add(true);
   Person p1 = new Person();
   p1.FirstName = "Michael";
   
   SpecialPerson p2 = new SpecialPerson();  // will be inherit from Person
   p2.FirstName = "Tanja";
   p2.Comment = "My comment for this person!";
   a.Add(p1);
   a.Add(p2);
   return a;
  }
  [Ajax.AjaxMethod]
  public Person Test12()
  {
   // Create your own class like you have done it before.
   // See Person class at end of this file!
   Person p = new Person();
   p.FirstName = "Michael";
   p.FamilyName = "Schwarz";
   p.Age = 28;
   Person mj = p.NewChild();
   mj.FirstName = "Marc Julain";
   mj.Age = 3;
   Person jo = p.NewChild();
   jo.FirstName = "Jan Oliver";
   jo.Age = 1;
   p.Children = new Person[2];
   p.Children[0] = mj;
   p.Children[1] = jo;
   // Return the object without any change on the source code.
   return p;
  }
  [Ajax.AjaxMethod]
  public NewsTicker Test13()
  {
   NewsTicker[] nt = new NewsTicker[10];
   #region Build some examples (will be stored in a database or xml file)
   nt[0] = new NewsTicker("Ajax.NET Library", "", 4);
   nt[1] = new NewsTicker("Google Search", "", 2);
   nt[2] = new NewsTicker("It is now " + DateTime.Now.ToString(), "", 4);
   nt[3] = new NewsTicker("ASP.NET Weblogs", "http://weblogs.asp.net/mschwarz", 3);
   nt[4] = new NewsTicker("Free Ajax.NET Wrapper", "http://weblogs.asp.net/mschwarz", 4);
   nt[5] = new NewsTicker("New C# examples online!", "", 3);
   nt[6] = new NewsTicker("PC-Topp.NET Demo", "", 2);
   nt[7] = new NewsTicker("NEW Ajax.NET Library", "", 4);
   nt[8] = new NewsTicker("Download ajax.dll", "", 2);
   nt[9] = new NewsTicker("Free Download!!", "", 2);
   #endregion
   Random r = new Random(System.DateTime.Now.Second);
   int i = r.Next(0, nt.Length -1);
   return nt[i];
  }
  [Ajax.AjaxMethod]
  public System.Data.DataSet Test15()
  {
   System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection("server=(local);uid=??;password=????;Initial Catalog=Northwind;");
   System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand("SELECT TOP 10 * FROM Customers C INNER JOIN Orders O ON O.CustomerID = C.CustomerID", conn);
   
   System.Data.SqlClient.SqlDataAdapter da = new System.Data.SqlClient.SqlDataAdapter(cmd);
   System.Data.DataSet ds = new System.Data.DataSet();
   try
   {
    conn.Open();
    try
    {
     da.Fill(ds);
    }
    catch(Exception)
    {}
    finally
    {
     conn.Close();
     conn.Dispose();
    }
   }
   catch(Exception)
   {}
   return ds;
  }
  [Ajax.AjaxMethod]
  public System.Drawing.Bitmap Test16()
  {
   System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(200, 50);
   System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bmp);
  
   g.FillRectangle(new System.Drawing.SolidBrush(System.Drawing.Color.Yellow), 0, 0, 199, 49);
   g.DrawString(DateTime.Now.ToString(), new System.Drawing.Font("Arial", 10), new System.Drawing.SolidBrush(System.Drawing.Color.Red), 10, 10);
   return bmp;
  }
  [Ajax.AjaxMethod]
  public int Test17(int[] i)
  {
   int r = 0;
   foreach(int ii in i)
    r += ii;
   return r;
  }
  [Ajax.AjaxMethod]
  public string Test18(string[] s)
  {
   string r = "";
   foreach(string ss in s)
    r += "<p>" + ss + "</p>\r\n";
   return r;
  }
  [Ajax.AjaxMethod]
  public System.Web.UI.HtmlControls.HtmlSelect Test19(string car)
  {
   System.Web.UI.HtmlControls.HtmlSelect control = new System.Web.UI.HtmlControls.HtmlSelect();
   switch(car)
   {
    case "VW":
     control.Items.Add("Golf");
     control.Items.Add("Passat");
     control.Items.Add("Beetle");
     control.Items.Add("Phaeton");
     break;
    case "Mercedes":
     control.Items.Add("S Class");
     control.Items.Add("E Class");
     control.Items.Add("A Class");
     control.Items.Add("M Class");
     break;
    case "Citroen":
     control.Items.Add("C3 Pluriel");
     control.Items.Add("C5 Break");
     control.Items.Add("C8");
     control.Items.Add("Berlingo");
     break;
   }
   return control;
  }
  [Ajax.AjaxMethod(30)]
  public System.DateTime Test20()
  {
   return DateTime.Now;
  }
  [Ajax.AjaxMethod]
  public System.Web.UI.HtmlControls.HtmlSelect Test21(System.Web.UI.HtmlControls.HtmlSelect select)
  {
   select.Items.Add("New option added at " + DateTime.Now);
   return select;
  }
  [Ajax.AjaxMethod]
  public System.Xml.XmlDocument Test22()
  {
   System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
   doc.LoadXml("<ROOT/>");
   doc.DocumentElement.InnerText = DateTime.Now.ToString();
   return doc;
  }
 }



 [Serializable]
 public class NewsTicker
 {
  public Guid ID = Guid.NewGuid();
  public NewsTicker(string text, string url, int duration)
  {
   this.Text = text;
   this.URL = url;
   this.Duration = duration;
  }
  public string Text;
  public string URL;
  public int Duration = 60;
 }
 [Serializable]
 public class Person // : System.Collections.CollectionBase
 {
  public string FirstName;
  public string FamilyName;
  public int Age = 0;
  public decimal Money = 200.5m; 
  public Person NewChild()
  {
   Person p = new Person();
   p.FamilyName = FamilyName;
   return p;
  }
  public Person[] Children = null;
  #region CollectionBase Methods
//  public Person this[ int index ]  
//  {
//   get{ return ((Person)List[index]); }
//   set{ List[index] = value; }
//  }
//
//  public int Add(Person value)
//  {
//   return(List.Add(value));
//  }
//
//  public int IndexOf(Person value)  
//  {
//   return(List.IndexOf(value));
//  }
//
//  public void Insert(int index, Person value)  
//  {
//   List.Insert(index, value);
//  }
//
//  public void Remove(Person value)  
//  {
//   List.Remove(value);
//  }
//
//  public bool Contains(Person value)  
//  {
//   // If value is not of type Int16, this will return false.
//   return(List.Contains(value));
//  }
//
//  protected override void OnInsert(int index, Object value)  
//  {
//   if(value.GetType() != Type.GetType("CSharpSample.Person"))
//    throw new ArgumentException("value must be of type CSharpSample.Person.", "value");
//  }
//
//  protected override void OnRemove(int index, Object value)  
//  {
//   if(value.GetType() != Type.GetType("CSharpSample.Person"))
//    throw new ArgumentException("value must be of type CSharpSample.Person.", "value");
//  }
//
//  protected override void OnSet(int index, Object oldValue, Object newValue)  
//  {
//   if(newValue.GetType() != Type.GetType("CSharpSample.Person"))
//    throw new ArgumentException("newValue must be of type CSharpSample.Person.", "newValue");
//  }
//
//  protected override void OnValidate(Object value)  
//  {
//   if(value.GetType() != Type.GetType("CSharpSample.Person"))
//    throw new ArgumentException("value must be of type CSharpSample.Person.");
//  }
  #endregion
 }
 [Serializable]
 public class SpecialPerson : Person
 {
  public string Comment = "";
 }
 [Serializable]
 public class IAjaxObjectSource
 {
  public string Title = "";
  public string Filename = "";
  public IAjaxObjectSource(string title, string filename)
  {
   Title = title;
   Filename = filename;
  }
 }
}

default.jsfunction callback_test1(res)
{
 document.getElementById("display1").innerHTML = res.value;
}
function test1()
{
 DemoMethods.Test1(
  document.getElementById("firstName").value, 
  document.getElementById("familyName").value,
  document.getElementById("email").value,
  document.getElementById("comment").value,
  callback_test1
  );
}
function callback_test2(res)
{
 document.getElementById("display2").innerHTML = res.value;
}
function test2()
{
 var d = null;
 try 
 {
  d = new DateTime(
   document.getElementById("year").value,
   document.getElementById("month").value,
   document.getElementById("day").value,
   0, 0, 0
   );
  
  DemoMethods.Test2(d, callback_test2);
 }
 catch(e)
 {
  alert("Error: " + e.description);
 }
}
function callback_test3(res)
{
 if(res != null && res.value != null && res.value.Tables != 0 && res.value.Tables.length == 1)
 {
  var html = [];
  
  for(var i=0; i<res.value.Tables[0].Rows.length; i++)
   html[html.length] = "<option>" + res.value.Tables[0].Rows[i].Country + "</option>";
 
  document.getElementById("display3").innerHTML = "<select>" + html.join("") + "</select>";
 }
}
function test3()
{
 DemoMethods.Test3(callback_test3);
}
function test4()
{
 var res = DemoMethods.Test4();
 if(res.error != null) alert(res.error);
}
function test5()
{
 DemoMethods.Test5(document.getElementById("sessionTest1").value);
}
function callback_test6(res)
{
 document.getElementById("sessionTest2").value = res.value;
}
function test6()
{
 DemoMethods.Test6(callback_test6);
}
function callback_test7(res)
{
 alert("The server has finished the 10 seconds call, now!");
}
function test7()
{
 DemoMethods.Test7(callback_test7);
}
function test8(ele)
{
 DemoMethods.Test8(test8_callback, ele);  // the server-side method has no arguments!
}
function test8_callback(res)
{
 if(res.error == null && res.context != null)
  res.context.innerHTML = res.value;
}
function test11()
{
 DemoMethods.Test11(test11_callback);
}
function test11_callback(res)
{
 if(res.value[2])       // bolean
  alert(res.value[1].toLocaleString()); // date
  
 alert(res.value[3].FirstName + " + " + res.value[4].FirstName);
}
function test12()
{
 DemoMethods.Test12(test12_callback);
}
function test12_callback(res)
{
 var s = res.value.FirstName + " " + res.value.FamilyName + ":\r\n";
 
 for(var i=0; i<res.value.Children.length; i++)
  s += "\t" + res.value.Children[i].FirstName + "\r\n";
 
 alert(s);
}
function test13()
{
 // call the Ajax.NET method on the server to get
 // a new news ticker object
  
 DemoMethods.Test13(test13_callback);
}
function test13_callback(res)
{
 if(typeof(res.value) == 'object')
 {
  // display the news ticker
    
  document.getElementById('newsticker').innerHTML = '<a href="' + res.value.URL + '">' + res.value.Text + '</a>';
  window.setTimeout(test13, res.value.Duration * 1000);
 }
}
function test16()
{
 DemoMethods.Test16(test16_callback);
}
function test16_callback(res)
{
 if(typeof(res.value) == 'object')
 {
  document.getElementById("imageholder").innerHTML = '';
  document.getElementById("imageholder").appendChild(res.value);
 }
}
function test17(n)
{
    // n will be a array of numbers/integer
 if(typeof(n) != 'object') return;
 alert(DemoMethods.Test17(n).value);
}
function test18()
{
 alert(DemoMethods.Test18( ["aaaa","bbbb","ccc\"ccccc"] ).value);
}
function test19(ele, car)
{
 HtmlControlUpdate('DemoMethods.Test19', 'dropDisplay', car);
}
function test20()
{
 return DemoMethods.Test20().value;
}
function test21(controlHolderId, id)
{
 HtmlControlUpdate('DemoMethods.Test21', controlHolderId, new HtmlControl(id));
}
window.attachEvent("onload", test13);

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