值未从 javascript 传递到 c#

Question

Asp.net

       <asp:HiddenField ID="hdnfldVariable" runat="server" />

Javascript

function GetUserName() {
        var wshell = new ActiveXObject("WScript.Shell");
        var unamer = document.getElementById('hdnfldVariable');
        unamer.value = wshell.ExpandEnvironmentStrings("%USERNAME%");
    }

c#

string username1 = hdnfldVariable.Value;

username1 获得空值。任何人都可以检查它的正确方法吗？

Answer 1

通过页面请求显式检索。

 string  username1 = Page.Request.Form["hdnfldVariable"].ToString();