实现课程、教师、学生的删除功能

shiyu-coder · Dec 26, 2020 · 0f3695d · 0f3695d
1 parent 33e1f5a
commit 0f3695d
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Showing 3 changed files with 77 additions and 1 deletion.
diff --git a/SIM_System.pro.user b/SIM_System.pro.user
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 4.11.0, 2020-12-24T01:09:00. -->
+<!-- Written by QtCreator 4.11.0, 2020-12-24T01:30:55. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>

diff --git a/adminwindow.cpp b/adminwindow.cpp
@@ -425,3 +425,73 @@ void AdminWindow::on_ModifyStudentButton_clicked()
         widget->show();
     }
 }
+
+void AdminWindow::on_FindLessonButton_clicked()
+{
+    QList<QTableWidgetItem*> items=ui->LessonWidget->selectedItems();
+    if(items.size()<=0){
+        QMessageBox::warning(this,"错误","您没有选中任何课程！");
+    }else{
+        QString res;
+        QSqlQuery query;
+        for(int i=0;i<items.size();i++){
+            int index=ui->LessonWidget->row(items.at(i));
+            query.exec("delete from CourseBasic where Cno='"+ui->LessonWidget->item(index,0)->text()+"'");
+            if(query.lastError().text()!=QSqlError::NoError){
+                res+=query.lastError().text();
+            }
+        }
+        if(res==""){
+            QMessageBox::warning(this,"删除课程","删除课程成功！");
+        }else{
+            QMessageBox::information(this,"删除课程",res);
+        }
+
+    }
+}
+
+void AdminWindow::on_DeleteTeacherButton_clicked()
+{
+    QList<QTableWidgetItem*> items=ui->TeacherWidget->selectedItems();
+    if(items.size()<=0){
+        QMessageBox::warning(this,"错误","您没有选中任何学生！");
+    }else{
+        QString res;
+        QSqlQuery query;
+        for(int i=0;i<items.size();i++){
+            int index=ui->TeacherWidget->row(items.at(i));
+            query.exec("delete from Teacher where Tno='"+ui->TeacherWidget->item(index,0)->text()+"'");
+            if(query.lastError().type()!=QSqlError::NoError){
+                res+=query.lastError().text();
+            }
+        }
+        if(res==""){
+            QMessageBox::information(this,"删除教师","删除教师成功！");
+        }else{
+            QMessageBox::warning(this,"删除教师",query.lastError().text());
+        }
+    }
+}
+
+void AdminWindow::on_DeleteStudentButton_clicked()
+{
+    QList<QTableWidgetItem*> items=ui->StudentWidget->selectedItems();
+    if(items.size()<=0){
+        QMessageBox::warning(this,"错误","您没有选中任何学生！");
+    }else{
+        QString res;
+        QSqlQuery query;
+        for(int i=0;i<items.size();i++){
+            int index=ui->StudentWidget->row(items.at(i));
+            query.exec("delete from Student where Sno='"+ui->StudentWidget->item(index,0)->text()+"'");
+            if(query.lastError().type()!=QSqlError::NoError){
+                res+=query.lastError().text();
+            }
+        }
+        if(res==""){
+            QMessageBox::information(this,"删除学生","删除学生成功！");
+        }else{
+            QMessageBox::warning(this,"删除学生",query.lastError().text());
+        }
+    }
+}
diff --git a/adminwindow.h b/adminwindow.h
@@ -78,6 +78,12 @@ private slots:
 
     void on_ModifyStudentButton_clicked();
 
+    void on_FindLessonButton_clicked();
+
+    void on_DeleteTeacherButton_clicked();
+
+    void on_DeleteStudentButton_clicked();
+
 private:
     Ui::AdminWindow *ui;