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<?php
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header('Content-Type: text/html; charset=utf-8');
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?>
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<html>
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<head>
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<title>成绩管理</title>
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</head>
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<body bgcolor="#CCCCFF">
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<form method="post">
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<table>
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<tr>
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<td>
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课程名：
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<!-- 以下JS代码是为了保证在页面刷新后，下拉列表中仍然保持着之前的选中项 -->
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<script type="text/javascript">
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function setCookie(name, value) {
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var exp = new Date();
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exp.setTime(exp.getTime() + 24 * 60 * 60 * 1000);
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document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
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}
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function getCookie(name) {
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var regExp = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
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var arr = document.cookie.match(regExp);
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if(arr == null) {
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return null;
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}
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return unescape(arr[2]);
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}
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</script>
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<select name="kcm" id="select_1" onclick="setCookie('select_1',this.selectedIndex)">
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<?php
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echo "<option>请选择</option>";
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require "fun.php";
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$kcm_sql = "select distinct KCM from KC"; //查找所有的课程名
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$kcm_result = $db->query($kcm_sql);
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while(list($KCM) = $kcm_result->fetch(PDO::FETCH_NUM)) { //输出课程名到下拉框中
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$KC = iconv('UTF-8', 'UTF-8', $KCM);
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echo "<option value=$KC>$KC</option>";
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}
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?>
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</select>
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<script type="text/javascript">
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var selectedIndex = getCookie("select_1");
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if(selectedIndex != null) {
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document.getElementById("select_1").selectedIndex = selectedIndex;
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}
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</script>
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</td>
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<td>
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<input name="btn" type="submit" value="查询">
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<input name="btn" type="submit" value="更新">
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</td>
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</tr>
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<tr>
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<td>
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姓名：
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<input type="text" name="xm" size="5">
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成绩：
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<input type="text" name="cj" size="2">
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</td>
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<td>
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<input name="btn" type="submit" value="录入">
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<input name="btn" type="submit" value="删除">
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</td>
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</tr>
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<tr>
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<td align="left">
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<table border=1 width="285">
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<tr bgcolor=#CCCCC0>
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<td align="center">姓名</td>
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<td align="center">成绩</td>
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</tr>
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<?php
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include "fun.php";
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//单击【查询】按钮
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if(@$_POST["btn"] == '查询') { //单击"查询"按钮
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$CourseName = $_POST['kcm'];
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$cj_sql = "select XM, CJ from CJ where KCM ='$CourseName'"; //查找该课程对应的成绩单
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$cj_result = $db->query(iconv('UTF-8', 'UTF-8', $cj_sql));
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if ($cj_result->rowCount() == 0) // 判断该学生是否存在
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echo "<script>alert('该门课程无学生选！');location.href='scoreManage.php';</script>";
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else {
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while (list ($XM, $CJ) = $cj_result->fetch(PDO::FETCH_NUM)) { // 获取查询结果集
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$Name = iconv('UTF-8', 'UTF-8', $XM);
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// 在表格中显示输出"姓名-成绩"信息
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echo "<tr><td align=center>$Name </td><td align=center>$CJ</td></tr>";
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}
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}
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}
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?>
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</table>
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</td>
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<td></td>
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</tr>
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</table>
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</form>
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</body>
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</html>
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<?php
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$CourseName = $_POST['kcm']; //获取提交的课程名
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$StudentName = $_POST['xm']; //获取提交的姓名
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$Score = $_POST['cj']; //获取提交的成绩
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$cj_sql = "select * from CJ where KCM ='$CourseName' and XM ='$StudentName'"; //先从数据库中查询该生该门课的成绩
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$result = $db->query(iconv('UTF-8', 'UTF-8', $cj_sql));
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//单击【录入】按钮
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if(@$_POST["btn"] == '录入') {
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if(empty($StudentName)||empty($Score))
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echo "<script>alert('添加失败，请确保已填写学生姓名及成绩！');location.href='scoreManage.php';</script>";
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else {
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if($result->rowCount() != 0) //查询结果不为空，表示该成绩记录已经存在
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echo "<script>alert('该记录已经存在！');location.href='scoreManage.php';</script>";
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else { //不存在才可以添加
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$insert_sql = "insert into CJ(XM, KCM, CJ) values('$StudentName', '$CourseName', '$Score')"; //添加新记录
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$insert_result = $db->query(iconv('UTF-8', 'UTF-8', $insert_sql)); //执行操作
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if($insert_result->rowCount() != 0)
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echo "<script>alert('添加成功！');location.href='scoreManage.php';</script>";
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else
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echo "<script>alert('添加失败，请确保有此学生！');location.href='scoreManage.php';</script>";
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}
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}
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}
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//单击【删除】按钮
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if(@$_POST["btn"] == '删除') {
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if($result->rowCount() != 0) { //查询结果不为空，该成绩记录存在可删除
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$delete_sql = "delete from CJ where XM ='$StudentName' and KCM ='$CourseName'"; //删除该记录
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$del_affected = $db->exec(iconv('UTF-8', 'UTF-8', $delete_sql)); //执行操作
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if($del_affected)
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echo "<script>alert('删除成功！');location.href='scoreManage.php';</script>";
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else
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echo "<script>alert('删除失败，请检查操作权限！');location.href='scoreManage.php';</script>";
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}
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else //不存在该记录，无法删
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echo "<script>alert('该记录不存在！');location.href='scoreManage.php';</script>";
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}
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if(@$_POST["btn"] == '更新'){ //单击"更新"按钮
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if($result->rowCount() != 0) {
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$update_sql = "update CJ set CJ = $Score where XM = '$StudentName' and KCM = '$CourseName'";
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$update_affected = $db->exec(iconv('UTF-8', 'UTF-8', $update_sql));
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if($update_affected)
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echo "<script>alert('更新成功！');location.href='scoreManage.php';</script>";
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else
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echo "<script>alert('更新失败，请检查输入信息！');location.href='scoreManage.php';</script>";
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}
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else
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echo "<script>alert('该记录不存在！');location.href='scoreManage.php';</script>";
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}
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?>
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