dawei
有关WebForm_DoCallback功能的MSDN的简单说明吗？
我可以找到的是这篇文章http://msdn.microsoft.com/en-us/magazine/cc163878.aspx
其中包括WebForm_DoCallback的实现,但是不能很好地解释参数本身.
function WebForm_DoCallback(eventTarget,eventArgument,eventCallback,context,errorCallback)
像什么是“eventTarget”呢？
什么是“上下文”？
等等…
解决方法
WebForm_DoCallback似乎是客户端对应的
GetCallbackEventReference.它生成与相同的参数,如下所示：
target: The name of a server Control that handles the client
callback. The control must implement
the ICallbackEventHandler interface
and provide a RaiseCallbackEvent
method.argument: An argument passed from the client script to the server
RaiseCallbackEvent method.clientCallback: The name of the client event handler that receives the
result of the successful server event.context: Client script that is evaluated on the client prior to
initiating the callback. The result of
the script is passed back to the
client event handler.clientErrorCallback: The name of the client event handler that receives
the result when an error occurs in the
server event handler.useAsync: true to perform the callback asynchronously; false to
perform the callback synchronously.
clientCallback和clientErrorCallback是客户端(通常是JavaScript)函数,参数的格式如下：
function clientCallback(returnmessage,context) {}
其中returnmessage是来自服务器的响应(或错误),上下文与之前传递的上下文相同.
参考文献：
MSDN: ClientScriptManager.GetCallbackEventReference Method
MSDN Magazine: Implications of Script Callbacks in ASP.NET
ESRI Developer Network: Page Postbacks and Client Callbacks
