更新文本框中表中的值但未更新 db 中的值? [英] Update the value from table in textbox BUT not updated the value in db?
问题描述
我已经列出了所有数据(项目、类别、工作、孔(孔正在评估标记))并在文本框中显示孔(标记).
I have listed all the data(Item, Category, Job, Hole(Hole is evaluating marks)) and I display the Hole(mark) in textbox filed.
我想在用户更改后更新 Hole(marks).
I want to update the Hole(marks) after user change.
我使用php列出所有数据
I list all the data using php
<?php
try{
$con = new PDO("mysql:host=localhost;dbname=gcmes", "root", "");
$sql = $con->query("SELECT * FROM details");
echo"<table class='info' align='center'>";
echo"<tr><td width='10'><b>No</b></td>
<td width='30'><b>Category</b></td>
<td width='50'><b>Job</b></td>
<td width='40'><b>Evaluate</b></td><tr>";
foreach($sql as $row) {
$Item = $row["Item"];
$Category = $row["Category"];
$Job = $row["Job"];
$Evaluate = $row["Hole 1"];
echo'
<tr>
<td>' . $Item . '</td>
<td>' . $Category . '</td>
<td>' . $Job . '</td>
<td><input type="input" name="Evaluate" id="Evaluate" value="' . $Evaluate . '">
</td>
</tr>
';
}
echo"</table></form>";
if(isset($_POST['Update_btn'])){
$Evaluate = $_POST["Hole 1"];
if(empty(Evaluate)){
echo "<script type='text/javascript'>alert('Please fill in the required fields to update!')</script>";
}
else{
$insert=$con->prepare("UPDATE details SET Evaluate=:Hole 1 WHERE Item=:Item");
$insert->bindParam(':Hole1',$Evaluate);
$insert->bindParam(":Item",$Item);
$insert->execute();
echo "<script type='text/javascript'>alert('Successful Updated ! ');
window.location.href = 'Hole 1.php';
</script>";
}//else
}//if add button
}//try
catch(PDOException $e)
{
echo "error".$e->getMessage();
}
?>
我只是用来显示按钮的 html 代码
The html code i just use to display button
<form id="form1" name="Hole 1" method="post" action="Hole 1.php">
<input name="Update_btn" type="image" id="Update_btn" onmouseover="this.src='UpdateO.png'" onmouseout="this.src='UpdateD.png'" value="submit" src="UpdateD.png" alt="submit Button" align="right">
</form>
问题是将警报消息成功更新但值未在我的数据库中更新.为什么?有什么问题?
这是我的界面我想更新提交的文本框中的标记
this is my interface i want update the marks in textbox filed
我需要更改孔作为选择让用户选择只需要更新的孔,我设置孔有一个下拉菜单列表.如何检测哪个孔?
我只是在 <td>{$rowData['Frequency']}</td>
(dn Fer 回答)之后添加代码
i just add the code after <td>{$rowData['Frequency']}</td>
(dn Fer answer)
<td><select name="hole">
<option value="Hole1">1</option>
<option value="Hole2">2</option>
<option value="Hole3">3</option>
<option value="Hole4">4</option>
<option value="Hole5">5</option>
<option value="Hole6">6</option>
<option value="Hole7">7</option>
<option value="Hole8">8</option>
<option value="Hole9">9</option>
<option value="Hole10">10</option>
<option value="Hole11">11</option>
<option value="Hole12">12</option>
<option value="Hole13">13</option>
<option value="Hole14">14</option>
<option value="Hole15">15</option>
<option value="Hole16">16</option>
<option value="Hole17">17</option>
<option value="Hole18">18</option>
</select>
推荐答案
请记住以下几点:
- 我和你的环境不一样,所以它可能不起作用一个.
- 不鼓励在数据库 fieldNames 和 arrayKeys 等中使用空格.一世更喜欢使用lowerCamelCase,检查dB fieldNames是否与代码匹配下面!
- 阅读我在代码中添加的注释.
- 我没有考虑 psr 编码、值验证或安全性(sql 注入)等.代码是指导你的,你应该自己考虑这些事情.
希望能让你更接近你的目标......
Hopefully getting you closer to your goals...
更新:每行的 Evaluate 字段的值现在被验证为 1 到 5 范围内的整数.
<?php
//Initialize variables
$result = '';
$doUpdate = isset($_POST['updateButton_x']);
//Because button type is 'image', we get parameters buttonName_x and buttonName_y
//from the browsers POST request when the form is sent.
if ($doUpdate) {
//Update button pressed.
//Initialize variables
$stmtSetParams = $stmtInParams = array();
$validationOptions = array('options' => array('min_range' => 1, 'max_range' => 5));
//Define statement and parameters (Assuming dB field 'item' is the primary key).
$set = '`hole1` = CASE `item` ';
foreach ($_POST['evaluate'] as $item => $hole1) {
//Get input value of each table row
if (filter_var($hole1, FILTER_VALIDATE_INT, $validationOptions) !== false) {
//Field is not blank
$set .= 'WHEN ? THEN ? ';
$stmtSetParams[] = $stmtInParams[] = $item;
$stmtSetParams[] = $hole1;
} else {
//Field is not an integer from 1 to 5
$result .= "Field \'Evaluate\' of item \'$item\' with a value of \'$hole1\' is not from 1 to 5 and skipped while saving!\\n";
}
}
$set .= 'END';
//Define query placeholders
$placeHolders = implode(', ', array_fill(0, count($stmtInParams), '?'));
$query = <<<SQL
UPDATE `details` SET $set WHERE `item` IN ($placeHolders)
SQL;
}
//Query the dB.
try {
$dbh = new PDO('mysql:host=localhost;dbname=gcmes', 'root');
if ($doUpdate) {
//Update requested. Prepare and execute update query
$stmt = $dbh->prepare($query);
$stmt->execute(array_merge($stmtSetParams, $stmtInParams));
$result .= 'Update Completed!';
}
//Query for en fetch (updated) table data
$stmt = $dbh->query("SELECT * FROM `details`");
$tableData = $stmt->fetchAll(PDO::FETCH_ASSOC);
} catch (PDOException $e) {
//A PDO exception is raised
$result = 'Error: ' . addslashes($e->getMessage());
}
//Alert results of database operations
if ($result != '') {
echo "<script>alert('$result')</script>";
}
?>
<form id="form1" name="chooseFormNameIfNeeded" method="post" action="test.php">
<!-- attribute align is deprecated, define and use a class instead -->
<table class="info align-center">
<tr>
<!-- use th instead of td for table header -->
<!-- using <b> tag is discouraged -->
<th width="10"><b>No</b></th>
<th width="30"><b>Category</b></th>
<th width="50"><b>Job</b></th>
<th width="40"><b>Evaluate</b></th>
</tr>
<?php
foreach ($tableData as $rowData) {
//Print a table row for each of the fetched records
echo <<<HTML
<tr>
<td>{$rowData['item']}</td>
<td>{$rowData['category']}</td>
<td>{$rowData['job']}</td>
<td>
<!-- Assuming dB field 'item' is the primary key. -->
<input type="number" name="evaluate[{$rowData['item']}]" id="Evaluate" value="{$rowData['hole1']}"
min=1 max=5
>
</td>
</tr>
HTML;
}
?>
</table>
<!-- Attribute align is deprecated, define and use a class instead -->
<!-- Value attribute should not be specified -->
<input name="updateButton" type="image" id="Update_btn" src="http://via.placeholder.com/100x50/0000FF?text=Update"
alt="submit Button" class="align-right"
onmouseover="this.src='http://via.placeholder.com/100x50/00FF00?text=Update'"
onmouseout="this.src='http://via.placeholder.com/100x50/0000FF?text=Update'"
>
</form>
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