我們如何將文本框的值設置為下拉列表？

Question

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

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我們如何使用dropdownlist id將textbox值設置為dropdownlist

Answer 1

我想它看起來像這樣：

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

Answer 2

只需將.selectedIndex替換為.value就可以了
嘗試這個

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

 <!-- 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> 

Answer 3

這是一個簡單的功能

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