/// <summary>
/// 根据学生姓名查询学生信息
/// </summary>
public void Query_five()
{
Console.WriteLine("请输入要查询的学生姓名：");
string Student_Name = Console.ReadLine();
string sql = string.Format("Select StudentNo,StudentName,Sex,GradeId,Phone,Address,BornDate,Email from Student Where StudentName Like '{0}%'", Student_Name);
Console.WriteLine("================================================================================================================");
Console.WriteLine("学号\t\t姓名\t性别\t年级\t联系电话\t地址\t\t出生日期\t\t邮箱");
Console.WriteLine("================================================================================================================");
try
{
var reader = DBOperation.ExecuteReader(sql);
StringBuilder buil = new StringBuilder();
while (reader.Read())
{
buil.AppendFormat("{0}\t{1}\t{2}\t{3}\t{4}\t{5}\t{6}\t{7}", reader["StudentNo"], reader["StudentName"], reader["Sex"], reader["GradeId"], reader["Phone"], reader["Address"], reader["BornDate"], reader["Email"]);
Console.WriteLine(buil);
buil.Length = 0;
}
reader.Close();
}
catch (Exception ex)
{
Console.WriteLine("出现异常：{0}", ex.Message);
}
finally
{
DBOperation.CloseConnection();
//Console.WriteLine("数据库关闭成功！");
}
}
/// <summary>
/// 按学号查询学生姓名
/// </summary>
public void Query_four()
{
Console.WriteLine("请输入要查询的学生学号：");
string Student_id = Console.ReadLine();
string sql = string.Format("Select StudentName from Student Where StudentNo Like '%{0}'", Student_id);
try
{
var reader = DBOperation.ExecuteReader(sql);
StringBuilder buil = new StringBuilder();
while (reader.Read())
{
buil.AppendFormat("学号是：{0}的学生姓名为：{1}", Student_id, reader["StudentName"]);
Console.WriteLine(buil);
buil.Length = 0;
}
reader.Close();
}
catch (Exception ex)
{
Console.WriteLine("出现异常：{0}", ex.Message);
}
finally
{
DBOperation.CloseConnection();
//Console.WriteLine("数据库关闭成功！");
}
}
/// <summary>
/// 查询学生信息
/// </summary>
public void Query_three()
{
string sql = "Select StudentNo,StudentName from Student";
Console.WriteLine("====================================================");
Console.WriteLine("学号\t\t\t姓名");
Console.WriteLine("====================================================");
try
{
var reader = DBOperation.ExecuteReader(sql);
StringBuilder buil = new StringBuilder();
while (reader.Read())
{
buil.AppendFormat("{0}\t\t{1}", reader["StudentNo"], reader["StudentName"]);
Console.WriteLine(buil);
buil.Length = 0;
}
reader.Close();
}
catch (Exception ex)
{
Console.WriteLine("出现异常：{0}", ex.Message);
}
finally
{
DBOperation.CloseConnection();
//Console.WriteLine("数据库关闭成功！");
}
}
int count; //输入次数
/// <summary>
/// 判断用户密码是否有误
/// </summary>
public void Query_one()
{
do
{
//登陆账号
Console.WriteLine("请输入用户名：");
name = Console.ReadLine();
Console.WriteLine("请输入密码：");
string pwo = Console.ReadLine();
string sql = string.Format("Select StudentName,LoginPwe from Student Where StudentName='{0}' and LoginPwe='{1}'", name, pwo);
try
{
var reader = DBOperation.ExecuteReader(sql);
if (reader.HasRows != true)
{
Console.WriteLine("\n登陆失败！用户名或密码有误！");
count++;
}
else
{
Console.WriteLine("登陆成功！欢迎：{0}\n\n欢迎使用学生管理系统", name);
reader.Close();
Choose_one();
}
}
catch (Exception ex)
{
Console.WriteLine("出现异常：{0}", ex.Message);
}
finally
{
DBOperation.CloseConnection();
//Console.WriteLine("数据库关闭成功！");
}
} while (count < 3);
Console.WriteLine("\n您输入三次有误，本次退出！");
}