摘要:利用 javascript 達到非同步效果
######################## aspx ######################################
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<script type="text/javascript" language="javascript">
function ReceiveServerData(args, context) {
document.getElementById("price1").innerText = args;
}
</script>
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
目前股價：<asp:Label ID="price1" runat="server"></asp:Label>
<asp:Button ID="Button1"
runat="server" Text="Button"
onclientclick="CallServer('','');return false;" />
</div>
</form>
</body>
</html>
############################ cs ###########################################
public partial class 非同步1 : System.Web.UI.Page, ICallbackEventHandler
{
public string str;
//註冊非同步使用的javascript
protected void Page_Load(object sender, EventArgs e)
{
ClientScriptManager csm = Page.ClientScript;
string s = csm.GetCallbackEventReference(this, "args", "ReceiveServerData", "context");
string strcallback = "function CallServer(args,context){" + s + ";};";
csm.RegisterClientScriptBlock(this.GetType(), "CallServer", strcallback, true);
//註冊語法如下:
//function CallServer(args,context)
//{ WebForm_DoCallback('__Page',args,ReceiveServerData,context,null,false); };
}
//非同步傳回結果值
public string GetCallbackResult()
{
return str;
}
//非同步運算
public void RaiseCallbackEvent(string eventArgument)
{
str = (5000).ToString("C");
}
}