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ช่วยหน่อยคครับ ต้องการ ให้ ลิส เมนู เลือกรายการที่ซ้ำ กันไม่ได้ ครับ ช่วยชี้แนะหน่อยครับ |
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หลักการ
var selectAbles = [1, 2, 3, 4, 5, 6, 7, n];
แล้วเวลาเลือกก็ไปตัดออก
จาก selectAbles
เวลาไม่เลือก ก็ push กลับไป
แล้วทุกๆครั้งที่ onchange ก็เอา selectAbles ไป สร้าง option ของ select ตัวอื่นๆ
ปล ขี้เกียจอ่านโค๊ด
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Date :
2018-09-17 17:48:23 |
By :
DK |
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ลองดูตัวอย่างนี้ครับ
https://teamtreehouse.com/community/disable-a-selected-option-if-is-selected-already
Code
<h4 class="info-text">Select 1st Employee<br>
<select name="wcl-employees1" id="wcl-employees1">
<option value="" disabled="" selected="" style="display:none;">Select One...</option>
<option value="ALCANTARA, ERIC">ALCANTARA, ERIC</option>
<option value="ALDRIGE, ,MERANDA">ALDRIGE, ,MERANDA</option>
<option value="ALTOBELLI, JAMES">ALTOBELLI, JAMES</option>
</select>
</h4>
<h4 class="info-text">Select 2nd Employee<br>
<select name="wcl-employees2" id="wcl-employees2">
<option value="" disabled="" selected="" style="display:none;">Select One...</option>
<option value="ALCANTARA, ERIC">ALCANTARA, ERIC</option>
<option value="ALDRIGE, ,MERANDA">ALDRIGE, ,MERANDA</option>
<option value="ALTOBELLI, JAMES">ALTOBELLI, JAMES</option>
</select>
</h4>
<h4 class="info-text">Select 3rd Employee<br>
<select name="wcl-employees3" id="wcl-employees3">
<option value="" disabled="" selected="" style="display:none;">Select One...</option>
<option value="ALCANTARA, ERIC">ALCANTARA, ERIC</option>
<option value="ALDRIGE, ,MERANDA">ALDRIGE, ,MERANDA</option>
<option value="ALTOBELLI, JAMES">ALTOBELLI, JAMES</option>
</select>
</h4>
Code (JavaScript)
var $select = $("select");
$select.on("change", function() {
var selected = [];
$.each($select, function(index, select) {
if (select.value !== "") { selected.push(select.value); }
});
$("option").prop("disabled", false);
for (var index in selected) { $('option[value="'+selected[index]+'"]').prop("disabled", true); }
});
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Date :
2018-09-18 09:17:13 |
By :
{Cyberman} |
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@เจ้าของกระทู้ ไม่รู้ว่าไปไม่ถูก หรือ ขี้เกียจกันแน่นะครับ ถ้าอยากสะดวก เอาแบบ ความคิดเห็นด้านบนก็ได้ ก็แค่ disable มันสิ
แต่ถ้าอยากจะเอาออกจริงๆ อะผมเขียนเป็นไกด์
ปล ถ้าแค่ขี้เกียจก็เลิกเขียนโปรแกรมไปเถอะ
Code (JavaScript)
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<script src="https://code.jquery.com/jquery-2.2.4.js"></script>
</head>
<body>
<select class="selectInput">
</select>
<select class="selectInput">
</select>
<select class="selectInput">
</select>
<select class="selectInput">
</select>
</body>
<script type="text/javascript">
$(document).ready(function () {
var selectAbles = [1, 2, 3, 4, 5, 6, 7];
var previous = 0;
initialValue();
function initialValue() {
$.each($('.selectInput'), function () {
var select = 0;
if ($(this).val()) {
select = $(this).val();
}
renderOption($(this), select);
});
}
function renderOption(input, select) {
input.empty();
if (select) {
input.append($("<option></option>").attr("value", select).text(select));
} else {
input.append($("<option></option>").attr("value", "").text(""));
}
$.each(selectAbles, function (k, v) {
input.append($("<option></option>")
.attr("value", v)
.text(v));
});
}
function remove(v) {
var index = getIndex(v);
selectAbles.splice(index, 1);
}
function add(v) {
selectAbles.push(v);
selectAbles.sort();
previous = 0;
}
function getIndex(val) {
for (key in selectAbles) {
if (selectAbles[key] == val) {
return key;
}
}
return false;
}
$('.selectInput').on("click", function () {
if ($(this).val() != "") {
previous = $(this).val();
}
});
$('.selectInput').change(function () {
remove($(this).val());
if (previous) {
add(previous);
}
initialValue();
});
});
</script>
</html>
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Date :
2018-09-18 10:15:59 |
By :
DK |
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Load balance : Server 03
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