我们如何将文本框值设置为下拉列表？

Question

 function SetUtcTimeZone() {
     var UTCTimeZone = document.getElementById("txtPortorAnchorDeparture").value;
     document.getElementById('ddlUTCTimeZone').selectedIndex = UTCTimeZone;
 }

如何使用下拉列表ID

将文本框值设置为下拉列表

Answer 1

我猜它会是这样的：

function SetTxt() {
     var indx = document.getElementById('ddlUTCTimeZone').selectedIndex;
     var val  = document.getElementById('ddlUTCTimeZone').options[indx].text;
     document.getElementById("txtPortorAnchorDeparture").value = val;
}

Answer 2

只需将.selectedIndex替换为.value即可 试试这个

＆＃13;

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function SetUtcTimeZone() {
  var UTCTimeZone = document.getElementById("txtPortorAnchorDeparture").value;
  document.getElementById('ddlUTCTimeZone').value = UTCTimeZone;
}

＆＃13;

<!-- Simple example -->
<select id="ddlUTCTimeZone">
  <option value="1">USA</option>
  <option value="2">Egypt</option>
  <option value="0">GMT</option>
</select>
<input id="txtPortorAnchorDeparture" type="text" />
<button type="button" onclick="SetUtcTimeZone()">Go</button>

＆＃13;

＆＃13;

＆＃13;

Answer 3

这是一个简单的功能

function dropdownToTextbox(dropdown, textbox) {
    var selectedOption = dropdown.options[dropdown.selectedIndex];
    textbox.value = selectedOption.value;
}