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上传时间: 2009-07-14
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AJAX .Net Wrapper quick usage guide Karl Seguin - http://www.openmymind.net/ - copyright 2005 (view AjaxGuide.doc for more detailed information) Step 1 - Create a reference to the ajax.dll file Step 2 - Set up the HttpHandler In the web.config, set up th e HttpHandler, like: ... Step 3 - In the Page_Load event, call the following function: '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)); //... } //... } Step 4 - In the codebehind of your page, add functions (like you normally would) that you'd like to be able to asynchrounsly called by client-side scripting. Mark these functions with the Ajax.JavascriptMethodAttribute(): //C# [Ajax.AjaxMethod()] public int ServerSideAdd(int firstNumber, int secondNumber) { return firstNumber + secondNumber; } 'VB.Net _ Public Function ServerSideAdd(ByVal firstNumber As Integer, ByVal secondNumber As Integer) As Integer Return firstNumber + secondNumber End Function The wrapper will automatically create a JavaScript function named "ServerSideAdd" which accepts to parameters. When called, this server-side function will be called and the result returned. Step 5 - Using JavaScript, you can invote the ServerSideAdd function like you would any other JavaScript function. You can call it using the two parameters, or optionally pass a call back function. The name of the function is, by default, ., such as Index.ServerSideAdd: alertIndex.ServerSideAdd(100,99)); OR Index.ServerSideAdd(100,99, ServerSideAdd_CallBack); function ServerSideAdd_CallBack(response){ alert(response.value); } The response exposes three properties, error, value and request. Note that you can return more complex objects that simple types. See the demo for additional information: http://ajax.schwarz-interactive.de/csharpsample/default.aspx ...展开收缩
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