我已经开发了一个mysql数据库和一个php代码。在PHP代码中,我使用jQuery(ajax调用)从数据库中获取数据。在html文件中,我仅打印了数据表的表头。我想从数据库中获取其余数据。代码给出:
HTML代码:
<div class="container box">
<div class="table-responsive">
<div id="alert_message"></div>
<table id="example" class="display">
<thead>
<tr>
<th>Student ID</th>
<th>Student Name</th>
<th>Email ID</th>
<th>Mobile</th>
<th>Status</th>
</tr>
</thead>
</table>
</div>
</div>
jQuery代码:
<script>
$(document).ready(function() {
$('#example').dataTable({
"processing": true,
"serverSide": true,
"ajax": {
"url": "fetch.php",
"type": "GET",
"datatype": "json"
}
});
});
</script>
fetch.php
<?php
$connect = mysqli_connect("localhost","root","","lib");
$sql = "SELECT StudentId, FullName, EmailId, MobileNumber, Status FROM tblstudents";
$result = mysqli_query($connect,$sql);
$json_array = array();
while ($row = mysqli_fetch_assoc($result))
{
$json_array[] = $row;
}
echo json_encode($json_array);
?>
仍然没有将数据打印在数据表中。 jQuery需要进行哪些更改?
答案 0 :(得分:0)
在jQuery Datatables中,不仅可以从ajax调用中获取数据。您还可以管理页面排序,搜索。
首先,您必须像这样修改javascript。
import javax.inject._
import models.Response
import play.api._
import play.api.http.DefaultHttpErrorHandler
import play.api.libs.json.Json
import play.api.mvc.Results._
import play.api.mvc._
import play.api.routing.Router
import _root_.controllers.JSONHelper.ResponseWrites
import scala.concurrent._
class ErrorHandler @Inject()(env: Environment,
config: Configuration,
sourceMapper: OptionalSourceMapper,
router: Provider[Router])
extends DefaultHttpErrorHandler(env, config, sourceMapper, router) {
override protected def onNotFound(request: RequestHeader, message: String): Future[Result] = {
Future.successful(
NotFound(Json.toJson(Response(isSuccess = false,"Resource Not Found", ("", ""))))
)
}
}
然后,在浏览器的开发人员工具->网络点击中可以看到,所有想要搜索,排序和排序的参数都将通过ajax调用传递。
您可以在ajax页面(在您的情况下为fetch.php)中通过print_r($ _ POST)进行查看,并在浏览器的开发人员工具->网络点击中在ajax上查看它。
您可以按以下方式收集所有信息,
$(document).ready(function() {
$('#example').dataTable({
"bProcessing": true,
"serverSide": true,
"ajax": {
"url": "fetch.php",
"type": "post"
},
error: function () { // error handling code
$("#example").css("display", "none");
}
});
});
然后您可以按以下方式构建查询
$order_by = $_POST['order']; // This array contains order information of clicked column
$search = $_POST['search']['value']; // This array contains search value information datatable
$start = $_POST['start']; // start limit of data
$length = $_POST['length']; // end limit of data
$order_type = $order_by[0]['dir'];
if ($order_by[0]['column']==0){
$order_column = "table_column_name_of_the_first_column_in_the_datatable";
} elseif ($order_by[0]['column']==1){
$order_column = "table_column_name_of_the_second_column_in_the_datatable";
}
然后获取总记录数,您可以执行以下操作,
if ($search!='' || $search!=NULL) {
$str = "WHERE column_name_to_search LIKE '%$search%' OR column_name_to_search LIKE '%$search%' ";
} else {
$str = "";
}
$data[][] = array();
$i = 0;
$sql = $connection->query("SELECT * FROM your_table $str ORDER BY $order_column $order_type LIMIT $start,$length");
while ($row_1 = $sql->fetch_assoc()){
$data[$i] = array($row_1['column_1'],$row_1['column_2']);
$i++;
}
最终构造将发送到正面视图的json输出。
$sql_2 = $connection->query("SELECT COUNT(*) AS all_count FROM your_table $str");
$row_2 = $sql_2->fetch_assoc();
$totalRecords = $row_2['all_count'];
if ($totalRecords==0){
$data = array();
}
那行得通。
答案 1 :(得分:0)
我知道这真的很晚,但是我使用了与您完全相同的代码(顺便感谢!),对我来说起作用的是简单地添加到JQuery代码中:
dataSrc =''(在url ='...'之后)
,以便DataTables知道它正在加载数组。放进去使代码工作正常!