从数据库的下拉列表中选择值

Question

我在select中有四个值，在数据库中可能只有两个值存储在它们中。

<select id="notebboktype" name="notebooktype">
    <option value="Convertible 2 in 1">Convertible 2 in 1</option>
    <option value="Notebook">Notebook</option>
    <option value="Laptop">Laptop</option>
    <option value="Ultrabook">Ultrabook</option>
</select>

我如何获得选定的价值。我试过这个：

<option value="Convertible 2 in 1" <?php if ($row['notebooktype'] == "Convertible 2 in 1") echo 'selected = "selected"'; ?>>Convertible 2 in 1</option>
<option value="Notebook" <?php if ($row['notebooktype'] == 'Notebook') echo 'selected = "selected"'; ?>>Notebook</option>
<option value="Ultrabook" <?php if ($row['notebooktype'] == 'Ultrabook') echo 'selected = "selected"'; ?>>Ultrabook</option>
<option value="laptop" <?php if ($row['notebooktype'] == 'laptop') echo 'selected = "selected"'; ?>>laptop</option>

但它仍然只给我第一个值。

Answer 1

您需要使用

  multiple 多个 <select id="notebboktype" name="notebooktype"

中的

>属性

无需回复选择=＆＃34;已选择＆＃34; 只是回显已选择

<select id="notebboktype" name="notebooktype" multiple>
    <option value="Convertible 2 in 1">Convertible 2 in 1</option>
    <option value="Notebook">Notebook</option>
    <option value="Laptop">Laptop</option>
    <option value="Ultrabook">Ultrabook</option>
</select>

Answer 2

<select id="notebboktype" name="notebooktype" multiple>
    <option value="Convertible 2 in 1">Convertible 2 in 1</option>
    <option value="Notebook">Notebook</option>
    <option value="Laptop">Laptop</option>
    <option value="Ultrabook">Ultrabook</option>
</select>


<select id="notebboktype" name="notebooktype" multiple>
    <option value="Convertible 2 in 1" <?php if ($row['notebooktype'] == "Convertible 2 in 1") echo 'selected'; ?>>Convertible 2 in 1</option>
    <option value="Notebook" <?php if ($row['notebooktype'] == 'Notebook') echo 'selected'; ?>>Notebook</option>
    <option value="Ultrabook" <?php if ($row['notebooktype'] == 'Ultrabook') echo 'selected'; ?>>Ultrabook</option>
    <option value="laptop" <?php if ($row['notebooktype'] == 'laptop') echo 'selected'; ?>>laptop</option>
</select>

Answer 3

这是..

 <option value="Convertible 2 in 1" <?php if ($row['notebooktype'] == "Convertible 2 in 1") {  echo ' selected = "selected"'; } ?> >Convertible 2 in 1</option>
        <option value="Notebook" <?php if ($row['notebooktype'] == 'Notebook') { echo ' selected = "selected"'; } ?> >Notebook</option>
        <option value="Ultrabook" <?php if ($row['notebooktype'] == 'Ultrabook') { echo ' selected = "selected"'; } ?> >Ultrabook</option>
        <option value="laptop" <?php if ($row['notebooktype'] == 'laptop') { echo ' selected = "selected"'; } ?> >laptop</option>