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'VB.Net public function Add(firstNumber as integer, secondNumber as integer) as integer return firstNumber + secondNumber end sub |
//C# public int Add(int firstNumber, int secondNumber) { return firstNumber + secondNumber; } |
如果你在安装引用时遇到了麻烦,可以参考这个链接的说明: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/vbtskaddingremovingreferences.asp |
<configuration> <system.web> <httpHandlers> <add verb="POST,GET" path="ajax/*.ashx" type="Ajax.PageHandlerFactory, Ajax" /> </httpHandlers> ... <system.web> </configuration> |
'vb.net Public Class Index Inherits System.Web.UI.Page Private Sub Page_Load(sender As Object, e As EventArgs) Handles MyBase.Load Ajax.Utility.RegisterTypeForAjax(GetType(Index)) '... end sub '... End Class |
//C# public class Index : System.Web.UI.Page{ private void Page_Load(object sender, EventArgs e){ Ajax.Utility.RegisterTypeForAjax(typeof(Index)); //... } //... } |
<script language="javascript" src="ajax/common.ashx"></script> <script language="javascript" src="ajax/NAMESPACE.PAGECLASS,ASSEMBLYNAME.ashx"></script> |
NAMESPACE.PAGECLASS |
当前页面的命名空间和类 |
ASSEMBLYNAME |
当前页面的程序集的名称 |
<%@ Page Inherits="AjaxPlay.Sample" Codebehind="sample.aspx.cs" ... %> <html> <head> <script language="javascript" src="ajax/common.ashx"></script> <script language="javascript" src="ajax/AjaxPlay.Sample,AjaxPlay.ashx"></script> </head> <body> <form id="Form1" method="post" runat="server"> ... </form> </body> </html> |
'VB.Net <Ajax.AjaxMethod()> _ Public Function ServerSideAdd (byval firstNumber As Integer, byval secondNumber As Integer) As Integer Return firstNumber + secondNumber End Function |
//C# [Ajax.AjaxMethod()] public int ServerSideAdd(int firstNumber, int secondNumber) { return firstNumber + secondNumber; } |
<%@ Page Inherits="AjaxPlay.Sample" Codebehind="sample.aspx.cs" ... %> <html> <head> <script language="javascript" src="ajax/common.ashx"></script> <script language="javascript" src="ajax/AjaxPlay.Sample,AjaxPlay.ashx"></script> </head> <body> <form id="Form1" method="post" runat="server"> <script language="javascript"> var response = Sample.ServerSideAdd(100,99); alert(response.value); </script> </form> </body> </html> |
Sample.ServerSideAdd(100,99, ServerSideAdd_CallBack); function ServerSideAdd_CallBack(response){ if (response.error != null){ alert(response.error); return; } alert(response.value); } |
value |
服务器端函数执行的返回值(可能是一个字符串、自定义对象或者dataset) |
error |
如果发生错误,则返回错误信息. |
request |
原始的xmlHttpRequest请求 |
context |
一个上下文对象 |
如果你想了解更多的关于XmlHttpRequest的知识,可以查看下面的链接: http://www.quirksmode.org/blog/archives/2005/02/xmlhttp_linkdum.html |
<script language="JavaScript"> //Asynchronous call to the mythical "GetDataSet" server-side function function getDataSet(){ AjaxFunctions.GetDataSet(GetDataSet_callback); } function GetDataSet_callback(response){ var ds = response.value; if(ds != null && typeof(ds) == "object" && ds.Tables != null){ var s = new Array(); s[s.length] = "<table border=1>"; for(var i=0; i<ds.Tables[0].Rows.length; i++){ s[s.length] = "<tr>"; s[s.length] = "<td>" + ds.Tables[0].Rows[i].FirstName + "</td>"; s[s.length] = "<td>" + ds.Tables[0].Rows[i].Birthday + "</td>"; s[s.length] = "</tr>"; } s[s.length] = "</table>"; tableDisplay.innerHTML = s.join(""); } else{ alert("Error. [3001] " + response.request.responseText); } } </script> |
[Serializable()] public class User{ private int _userId; private string _firstName; private string _lastName; public int userId{ get { return _userId; } } public string FirstName{ get { return _firstName; } } public string LastName{ get { return _lastName; } } public User(int _userId, string _firstName, string _lastName){ this._userId = _userId; this._firstName = _firstName; this._lastName = _lastName; } public User(){} [AjaxMethod()] public static User GetUser(int userId){ //Replace this with a DB hit or something :) return new User(userId,"Michael", "Schwarz"); } } |
private void Page_Load(object sender, EventArgs e){ Utility.RegisterTypeForAjax(typeof(User)); } |
<script language="javascript"> function getUser(userId){ User.GetUser(GetUser_callback); } function GetUser_callback(response){ if (response != null && response.value != null){ var user = response.value; if (typeof(user) == "object"){ alert(user.FirstName + " " + user.LastName); } } } getUser(1); </script> |
Public Class AjaxFunctions <Ajax.AjaxMethod()> _ Public Function Validate(username As String, password As String) As Boolean 'do something 'Return something End Function End Class |
'Vb.Net Private Sub Page_Load(sender As Object, e As EventArgs) Handles MyBase.Load Ajax.Utility.RegisterTypeForAjax(GetType(AjaxFunctions)) '... End Sub |
//C# private void Page_Load(object sender, EventArgs e){ Ajax.Utility.RegisterTypeForAjax(typeof(AjaxFunctions)); //... } |
[Ajax.AjaxMethod] public string Test1(string name, string email, string comment){ string html = ""; html += "Hello " + name + "<br>"; html += "Thank you for your comment <b>"; html += System.Web.HttpUtility.HtmlEncode(comment); html += "</b>."; return html; } |
'Vb.Net <Ajax.AjaxMethod(HttpSessionStateRequirement.Read)> _ Public Function DocumentReleased() As ArrayList If HttpContext.Current.Session("DocumentsWaiting") Is Nothing Then Return Nothing End If Dim readyDocuments As New ArrayList Dim documents() As Integer = CType(HttpContext.Current.Session("DocumentsWaiting"), Integer()) For i As Integer = 0 To documents.Length - 1 Dim document As Document = document.GetDocumentById(documents(i)) If Not document Is Nothing AndAlso document.Status = DocumentStatus.Ready Then readyDocuments.Add(document) End If Next Return readyDocuments End Function |
//C# [Ajax.AjaxMethod(HttpSessionStateRequirement.Read)] public ArrayList DocumentReleased(){ if (HttpContext.Current.Session["DocumentsWaiting"] == null){ return null; } ArrayList readyDocuments = new ArrayList(); int[] documents = (int[])HttpContext.Current.Session["DocumentsWaiting"]; for (int i = 0; i < documents.Length; ++i){ Document document = Document.GetDocumentById(documents[i]); if (document != null && document.Status == DocumentStatus.Ready){ readyDocuments.Add(document); } } return readyDocuments; } } |
<script language="javascript"> function DocumentsReady_CallBack(response){ if (response.error != null){ alert(response.error); return; } if (response.value != null && response.value.length > 0){ var div = document.getElementById("status"); div.innerHTML = "The following documents are ready!<br />"; for (var i = 0; i < response.value.length; ++i){ div.innerHTML += "<a href=\"edit.aspx?documentId=" + response.value[i].DocumentId + "\">" + response.value[i].Name + "</a><br />"; } } setTimeout('page.DocumentReleased(DocumentsReady_CallBack)', 10000); } </script> <body onload="setTimeout('Document.DocumentReleased(DocumentsReady_CallBack)', 10000);"> |
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