C#代碼
public partial class _Default : System.Web.UI.Page, ICallbackEventHandler
...{
private string result;
protected void Page_Load(object sender, EventArgs e)
...{
if (!Page.IsPostBack)
...{
string cbReference = Page.ClientScript.GetCallbackEventReference(this, "text", "ReceiveServerData", ""); //擷取一個對用戶端函數的引用；調用該函數時，將啟動一個對伺服器端事件的用戶端回調。
string callbackScript = "function dos(text){" + cbReference + ";}"; //註冊用戶端方法
Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "dos", callbackScript, true);
}
}
public void RaiseCallbackEvent(string text)
...{
if (text[0] == 'c')
...{
string checkcode = (string)Session["validateCode"];
string j = text.Substring(1);
checkcode = checkcode.ToLower();
j = j.ToLower();
if (j == checkcode)
result = "ctrue";
else
result = "cfalse";
}
else if (text[0] == 'e')
...{
string j = text.Substring(1);
LinkDataBase myLink = new LinkDataBase();
if (myLink.CheckEmail(j) == 1)
result = "efalse";
else
result = "etrue";
}
else if (text[0] == 'u')
...{
string j = text.Substring(1);
LinkDataBase myLink = new LinkDataBase();
if (myLink.CheckUser(j) == 1)
result = "ufalse";
else
result = "utrue";
}
}
public string GetCallbackResult()
...{
return result;
}
}
Javascript 加上下面的函數
function ReceiveServerData(text)
...{
if(text=="cfalse")
...{
checkValidateCode="false2";
SetCheckValidateCode(checkValidateCode);
}
else if(text=="ctrue")
...{
checkValidateCode="true";
SetCheckValidateCode(checkValidateCode);
}
else if(text=="etrue")
...{
checkEmail="true";
SetCheckEmail(checkEmail);
}
else if(text=="efalse")
...{
checkEmail="false3";
SetCheckEmail(checkEmail);
}
else if(text=="ufalse")
...{
checkUser="false4";
SetCheckUser(checkUser);
}
else if(text=="utrue")
...{
checkUser="true";
SetCheckUser(checkUser);
}
checking=false;
}
最後在Javascript 中用dos(str)調用
