2种asp.net ajax方法如何集成
c# asp.net vs2008
第一种方式
page_load下
  m_ADFCallbackFunctionString = Page.ClientScript.GetCallbackEventReference(this, "message",
  "processCallbackResult", "context", "postBackError", true);
  }

  public void RaiseCallbackEvent(string eventargs)
  {
  // 将传入参数依据&分割符分到querystring变量中
  Array keyValuePairs = eventargs.Split("&".ToCharArray());
  NameValueCollection queryString = new NameValueCollection();
  string[] keyValue;
  string response = "";
  if (keyValuePairs.Length > 0)
  {
  for (int i = 0; i < keyValuePairs.Length; i++)
  {
  keyValue = keyValuePairs.GetValue(i).ToString().Split("=".ToCharArray());
  queryString.Add(keyValue[0], keyValue[1]);
  }
  }
  else
  {
  keyValue = eventargs.Split("=".ToCharArray());
  if (keyValue.Length > 0)
  queryString.Add(keyValue[0], keyValue[1]);
  }
  // 是否进行缓存，对于属性查询图形不进行缓存
  bool needCached = true;
  // 针对参数中指定的ActiveType不同执行不同操作
  string Condtion = queryString["Condtion"];
  string eventArg = queryString["EventArg"];
后面是arcgis操作省略

  public string GetCallbackResult()
  {
  return m_ADFCallbackFunctionString;
  }
总结这个方式是 pageload 下定义 m_ADFCallbackFunctionString = Page.ClientScript.GetCallbackEventReference(this, "message",
  "processCallbackResult", "context", "postBackError", true);
  之后2个void public void RaiseCallbackEvent(string eventargs)
public string GetCallbackResult() 经过测试是可用的


第二种方式 环境任然是vs2008 asp.net c#
pageload 下定义
a1 = Page.ClientScript.GetCallbackEventReference(this,
  "message", "processCallbackResult", "context", "postBackError", true);

a2 = Page.ClientScript.GetCallbackEventReference(this,
  "message", "processCallbackResult", "context", "postBackError", true);

a3 = Page.ClientScript.GetCallbackEventReference(this,
  "message", "processCallbackResult", "context", "postBackError", true);
private string callbackArg
  string ICallbackEventHandler.GetCallbackResult()
  {
  // 判断是否有相应的缓存信息
  string cachedResponse = Cache[callbackArg] as string;
  if (cachedResponse != null)
  {
  return cachedResponse;
  }
  // 将传入参数依据&分割符分到querystring变量中
  Array keyValuePairs = callbackArg.Split("&".ToCharArray());
  NameValueCollection queryString = new NameValueCollection();
  string[] keyValue;
  string response = "";
  if (keyValuePairs.Length > 0)
  {
  for (int i = 0; i < keyValuePairs.Length; i++)
  {
  keyValue = keyValuePairs.GetValue(i).ToString().Split("=".ToCharArray());
  queryString.Add(keyValue[0], keyValue[1]);