如何使用javascript在文本框中显示选定的下拉文本。 [英] how can i display selected dropdown text in textbox using javascript.

问题描述

请任何人可以帮助我。新的.net帮助我......

解决方案

如果你有一个看起来像这样的选择元素：

< select id =   ddlViewBy> 
< option value =   1> test1 < /  选项 >  
< option value =   2 selected =   selected> test2 < /  选项 < span class =code-keyword>>  
< option value =   3 > test3 < /  选项  >  
 < /  选择 >  

运行此代码：

  var  e =  document  .getElementById（  ddlViewBy ）; 
  var  strUser = e.options [e.selectedIndex] .value; 

make strUser如果你真正想要的是test2，那么这样做：

  var  e =  document  .getElementById（  ddlViewBy ）; 
  var  strUser = e.options [e.selectedIndex] .text; 

哪个会使strUser是test2

 var parm = document.getElementById（<％= DropDownList1.ClientID％>）; 
 var texte = document.getElementById（<％= txtzip.ClientID％>）; 
 
 texte.value = parm.options [parm.selectedIndex] .text; 

尝试这会帮助你

 <   textarea     id   =  mytext >  <   / textarea  >  
 
 <  选择    id   = 下拉列表 >  
 <  选项    value   =  > 无<   / option  >  
 <  选项    value   =  text1 >  text1 <   / option  >  
 <  选项    value   =  text2 >  text2 <   / option  >  
 <  选项    value   =  text3 >  text3 <   / option  >  
 <  选项    value   =  text4 >  text4 <   / option  >  
 <   / select  >  

< script type =   text / javascript< /跨度>> 
  var  mytextbox =  document  .getElementById（'   mytext'）; 
  var  mydropdown =  document  .getElementById（'   dropdown'）; 
 
 mydropdown.onchange =  function （）{
 mytextbox.value = mytextbox.value + 此。价值;  //  要上架 
  //   mytextbox.innerHTML = this.value;  
} 
< / script> 

pls any one can help me.iam new to .net help me......

解决方案

If you have a select element that looks like this:

<select id="ddlViewBy">
<option value="1">test1</option>
<option value="2" selected="selected">test2</option>
<option value="3">test3</option>
</select>

Running this code:

var e = document.getElementById("ddlViewBy");
var strUser = e.options[e.selectedIndex].value;

Would make strUser be 2. If what you actually want is test2, then do this:

var e = document.getElementById("ddlViewBy");
var strUser = e.options[e.selectedIndex].text;

Which would make strUser be test2

var parm = document.getElementById("<%=DropDownList1.ClientID %>");
        var texte = document.getElementById("<%=txtzip.ClientID %>");
        
        texte.value = parm.options[parm.selectedIndex].text;

try this it will help you

try this...:)

<textarea id="mytext"></textarea>

<select id="dropdown">
    <option value="">None</option>
    <option value="text1">text1</option>
    <option value="text2">text2</option>
    <option value="text3">text3</option>
    <option value="text4">text4</option>
</select>

<script type="text/javascript">
    var mytextbox = document.getElementById('mytext');
    var mydropdown = document.getElementById('dropdown');

    mydropdown.onchange = function(){
          mytextbox.value = mytextbox.value  + this.value; //to appened
         //mytextbox.innerHTML = this.value;
    }
</script>

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