Question

我想知道如何从选择框中选择多个选项，如下所示：

<label for="color">Colors</label>
<select class="inputbox" name="color" id="color" style="width:180px;">
    <option value="Black">Black</option>
    <option value="White">White</option>
    <option value="Tan">Tan</option>
    <option value="Navy">Navy</option>
    <option value="RoyalBlue">Royal Blue</option>
    <option value="Red">Red</option>
    <option value="Yellow">Yellow</option>
    <option value="Hunter(DarkGreen)">Hunter(Dark Green)</option>
    <option value="Kelly(Green)">Kelly(Green)</option>
    <option value="Burgundy">Burgundy</option>
 </select>

由于

Answer 1

您所要做的就是在选择框中使用multiple属性。

<select name="some-select" id="some-select" multiple="multiple">
    <option>Black</option>
    <option>White</option>
    <option>Other</option>
</select>

Answer 2

通常，如果您在标记中使用“multiple”选项，则HTML表单将允许您从组合框中按Ctrl键单击多个选项。您还可以使用“Shift-Click”获取一系列值。

但有趣的问题是如何实现这一点，以便超过10％（估计）的用户可以弄清楚如何使用它？

Answer 3

为了在PHP中的$_GET / $_POST / $_REQUEST数组中为命名参数使用多个值，您必须将表单字段命名为：

name="myFieldName[]";

通过将大括号放在字段名称的末尾，PHP将能够为该参数存储多个值。如果您使用多个复选框或多个选择，您应该像这样命名您的字段。并且不要忘记HTML选项标记的值。

在您的情况下，HTML应该是这样的：

<select name="some-select[]" id="some-select" multiple="multiple">
<option value="balck">Black</option>
<option value="white">White</option>
<option value="other">Other</option>
</select>

作为表单操作的PHP代码可以包含这样的数据。

$mySelectValues = $_REQUEST['some-select'];
// mySelectValues is an array now
foreach ($mySelectValues as $selected) {
    echo $selected;
}

当您查看HTML页面时，您可以通过按住Ctrl键然后选择其他选项来选择多个选项。

Answer 4

如何选择多个项目？ CTRL +单击选项。

Answer 5

我遇到了同样的问题，而htmlforums的那些人设法想出办法。

继承论坛链接：

http://www.htmlforums.com/client-side-scripting/t-select-multiple-items-without-ctrl-117760.html

接下来是答案:(我没有时间适应你的代码，对不起）

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Select Test</title>

        <meta name="keywords" content="" />
        <meta name="description" content="" />

        <script type="text/javascript">

            // Variables we need
            var previous    = new Array();
            var lastClicked = '';

            // We are going to attach event listeners, no code at the bottom or anything hard coded...
            function addEvent(obj, evType, fn)
            { 
                if(obj.addEventListener)
                {
                    obj.addEventListener(evType, fn, false);
                    return true;
                }
                else if(obj.attachEvent)
                {
                    var r = obj.attachEvent('on' + evType, fn);
                    return r;
                }
                else
                {
                    return false; 
                } 
            }

            // Let's begin when the DOM is ready
            addEvent(window, 'load', begin);

            // Attach the handlers to our selects
            function begin()
            {
                addSelect('numbers');
                addSelect('sm');
                addSelect('sm2');
            }

            // We add a couple of handlers to each
            function addSelect(id)
            {
                var sel = document.getElementById(id);
                addEvent(sel, 'click', whichElement);
                addEvent(sel, 'click', addRemoveClicked);
            }

            // Find which element we are looking at on this click
            function whichElement(e)
            {
                if(!e)
                {
                    var e = window.event;
                }

                if(e.target)
                {
                    lastClicked = e.target;
                }
                else if(e.srcElement)
                {
                    lastClicked = e.srcElement;
                }

                if(lastClicked.nodeType == 3) // Safari bug
                {
                    lastClicked = lastClicked.parentNode;
                }
            }

            // Make sure we are displaying the correct items
            function addRemoveClicked(e)
            {
                if(!previous[this.id])
                {
                    previous[this.id] = new Array();
                }

                // Remember what has been used
                if(previous[this.id][lastClicked.value] == 1)
                {
                    previous[this.id][lastClicked.value] = 0;
                }
                else
                {
                    previous[this.id][lastClicked.value] = 1;
                }

                var selectBox = document.getElementById(this.id);

                // Add correct highlighting
                for(var i = 0; i < selectBox.options.length; i++)
                {
                    selectBox.options[i].selected = '';

                    if(previous[this.id][selectBox.options[i].value] == 1)
                    {
                        selectBox.options[i].selected = 'selected';
                    }
                }
            }
        </script>
    </head>

    <body>
        <form name="selectTest" action="">

            <select name="numbers" id="numbers" multiple="multiple" size="6"> 
                <option value="1">One</option>
                <option value="2">Two</option>
                <option value="3">Three</option>
                <option value="4">Four</option>
                <option value="5">Five</option>
            </select>

            <select name="sm" id="sm" multiple="multiple" size="6">
                <option value="a">To make</option>
                <option value="b">Multiple</option>
                <option value="c">Selections</option>
                <option value="d">Just Click</option>
                <option value="e">With The</option>
                <option value="f">Mouse</option>
            </select>

            <select name="sm2" id="sm2" multiple="multiple" size="6">
                <option>Everything</option>
                <option>Is</option>
                <option>Possible</option>
                <option>Until</option>
                <option>Proven</option>
                <option>Otherwise</option>
            </select>

        </form>
    </body>
    </html>

我希望这会有所帮助。

谢谢，

Matthew Millar

Answer 6

我在这里很晚，但会尝试发布我的回答。可能不是最好的。

将multiple属性添加到选择中，并将name="color"更改为name="color[]"

等数组

<label for="color">Colors</label>
<select class="inputbox" name="color[]" id="color" style="width:180px;" multiple>
    <option value="Black">Black</option>
    <option value="White">White</option>
    <option value="Tan">Tan</option>
    <option value="Navy">Navy</option>
    <option value="RoyalBlue">Royal Blue</option>
    <option value="Red">Red</option>
    <option value="Yellow">Yellow</option>
    <option value="Hunter(DarkGreen)">Hunter(Dark Green)</option>
    <option value="Kelly(Green)">Kelly(Green)</option>
    <option value="Burgundy">Burgundy</option>
 </select>

和php可以做这样的事情

foreach ($_POST['color'] as $selectedColor)
echo $selectedColor."\n";
//and this echos a comma separated string
$colorString=implode(",", $_POST['color']);
echo $colorString;

如何从选择框中选择多个选项

6 个答案: