如何获取由jquery / javascript更新的隐藏字段值代码

I have an <asp:menu/> control and a hidden field.Now i am using jQuery to change value of hidden field. Code is:-

我有一个控件和一个隐藏的字段。现在我使用jQuery来改变隐藏字段的值。代码是： -

$(function() {

    $(".primaryStaticMenu  tr,td").each(function(index) {

        $(this).click(function() {

            if ($(this).attr("title") != "undefined"
                && $(this).attr("title").length > 0) {

                document.getElementById('ctl00_Hidden_Master_Location').value = $(this).attr("title");

                alert(document.getElementById('ctl00_Hidden_Master_Location').value);
                //return false;
            }
        });
    });
});

Server side code to get updated value is:-

获取更新值的服务器端代码是： -

string Get_cng_value = Hidden_Master_Location.Value;

But Hidden_Master_Location.Value shows null every time. can any one tell me how to get updated value of hidden field from code behind.

但是Hidden_Master_Location.Value每次都显示为null。任何人都可以告诉我如何从后面的代码中获取隐藏字段的更新值。

2 个解决方案

#1

Let say your hidden field is as..

让我们说你隐藏的领域是......

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

you can get the value of hidden filed in jquery as

你可以在jquery中得到隐藏字段的值

var locationValue= $("#<%= Hidden_Master_Location.ClientID %>").val();

#2

Do this, it works for me.the trick is to save your hidden field precious id in another hidden input field then build it back using that hidden value.

这样做，它适用于我。诀窍是将您隐藏的字段珍贵id保存在另一个隐藏的输入字段中，然后使用该隐藏值重新构建它。

Markup

标记

<asp:HiddenField ID="HiddenFieldMaster" runat="server" />
   <input type="hidden" id="inputHidden" value='<%= HiddenFieldMaster.ClientID%>' />

Javascript

使用Javascript

    $(function() {

$(".primaryStaticMenu  tr,td").each(function(index) {

    $(this).click(function() {

        if ($(this).attr("title") != "undefined"
            && $(this).attr("title").length > 0) {

           var inputHidden = document.getElementById('inputHidden');
                $("#" + inputHidden.value).val($(this).attr("title"));

            alert(inputHidden.value);
            //return false;
        }
    });
});
 });

Code Behind

代码背后

String Get_cng_value = HiddenFieldMaster.Value;

#1