如何使用JavaScript设置ASP控件的值 [英] How can I set the value of ASP Controls using JavaScript

问题描述

我有两个ASP控件.一个是文本框，另一个是组合框.

I have two ASP Controls. One is Text Box and another is ComboBox.

<asp:TextBox ID="txtName" runat="server"></asp:TextBox>
    <asp:DropDownList ID="ddlCountry" runat="server"></asp:DropDownList>

现在，我想设置TextBox的值，并使用JavaScript获取dropDown列表的选定索引.

Now I like to set the value of TextBox and Get the selected index of dropDown list using JavaScript.

How can I do these in Java Script?

推荐答案

这是JavaScript基础.这是您的操作方法:
设置文本框值-

This is JavaScript basics. Here is how you will do it:
Set textbox value -

document.getElementById("txtName").value = "somevalue";

获取选定的dropDown索引-

Get the selected index of dropDown -

var index = document.getElementById("ddlCountry").selectedIndex

顺便说一句，在jQuery中这样做会减少编写代码的次数.这就是您在jQuery中做相同事情的方式-

BTW doing this in jQuery will reduce writing code more. Here''s how you do the same thing in jQuery -

(" span>).val(" ); var 索引=

("#txtName").val("somevalue"); var index =

(" ).prop(" );

("#ddlCountry").prop("selectedIndex");

这篇关于如何使用JavaScript设置ASP控件的值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！