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  • ADO测试题

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using adoceshi.model;
    using System.Data.SqlClient;
    
    
    namespace adoceshi.dataopration
    {
        public class studentdata
        {
            SqlConnection conn = null;
            SqlCommand cmd = null;
            public studentdata()
            {
                conn = new SqlConnection("server=.;database=adoceshi;user=sa;pwd=123;");
                cmd = conn.CreateCommand();
            }
    
    
            public List<Student> selectall()
            {
                List<Student> list = new List<Student>();
    
                cmd.CommandText = "select * from Student";
                try
                {
                    conn.Open();
                    SqlDataReader dr = cmd.ExecuteReader();
                    if (dr.HasRows)
                    {
                        while (dr.Read())
                        {
                            Student s = new Student();
                            s.Code = dr["Code"].ToString();
                            s.Name = dr["Name"].ToString();
                            s.Sex = Convert.ToBoolean(dr["Sex"]);
                            s.Birthday = Convert.ToDateTime(dr["Birthday"]);
                            s.SsubjectCode = dr["SsubjectCode"].ToString();
    
                            list.Add(s);
                        }
                    }
                    conn.Close();
                }
                catch
                {
                    conn.Close();
                    Console.WriteLine("数据库连接失败!请重新连接!");
                }
                return list;
    
            }
            
            //用户操作
            //1新增
            public void xinzeng()
            {
                string code, name, zhuanye,zhuanyecode,s;
                bool sex;
                DateTime shengri;
                while (true)
                {
                    Console.Write("请输入学生编号:");
                    string c = Console.ReadLine();
                    cmd.CommandText = "select * from student where  Code=@c";
                    cmd.Parameters.Clear();
                    cmd.Parameters.Add("@c",c);
                    conn.Open();
                    SqlDataReader dr = cmd.ExecuteReader();
                    if (dr.HasRows)
                    {
    
                        conn.Close();
                        Console.WriteLine("您输入的学生编号已拥有,请重新输入!");
                    }
                    else
                    {
    
                        conn.Close();
                        code = c;
                        break;
                    }
                }
                while (true)
                {
                    Console.Write("请输入学生姓名(不能为空):");
                    string n = Console.ReadLine();
                    if (n == "")
                    {
                        Console.WriteLine("用户名不能为空!请重新输入!");
                    }
                    else
                    {
                        name = n;
                        break;
                    }
                }
                while (true)
                {
                    Console.Write("请输入学生性别(男/女):");
                   s = Console.ReadLine();
                    if (s == "")
                    {
                        sex = true;
                        break;
                    }
                    else if (s == "")
                    {
                        sex = false;
                        break;
                    }
                    else
                    {
                        Console.WriteLine("您的输入有误!只能输入男或女,请重新输入!");
                    }
                }
                while (true)
                {
                    Console.Write("请输入学生生日(如2000/12/12):");
                    try
                    {
                        DateTime ri = Convert.ToDateTime(Console.ReadLine());
                        shengri = ri;
                        break;
                    }
                    catch
                    {
                        Console.WriteLine("您输入的生日格式不正确!请重新输入!");
                    }
                }
                while (true)
                {
                    Console.Write("请输入学生专业:");
                    string z = Console.ReadLine();
                    cmd.CommandText = "select * from Ssubject where SsubjectName like @n";
                    cmd.Parameters.Clear();
                    cmd.Parameters.Add("@n", "%"+z+"%");
                  
                        conn.Open();
                        SqlDataReader dr = cmd.ExecuteReader();
                        if (dr.HasRows)
                        {
                            dr.Read();
                            zhuanye = dr["SsubjectName"].ToString();
                                zhuanyecode = dr["SsubjectCode"].ToString();
                            conn.Close();
                            break;
                        }
                        else
                        {
                            conn.Close();
                            Console.WriteLine("没有该专业!请重新输入!");
                        }
                }
                Console.WriteLine(code+"	"+name+"	"+s+"	"+shengri+"	"+zhuanye);
                while(true)
                {
                Console.Write("以上为新增学生的信息,是否确定添加?(Y/N):");
                string queding = Console.ReadLine();
                if(queding=="y"||queding=="Y")
                {
                    cmd.CommandText="insert into student values(@c,@x,@s,@b,@sub)";
                    cmd.Parameters.Clear();
                    cmd.Parameters.Add("@c",code);
                     cmd.Parameters.Add("@x",name);
                     cmd.Parameters.Add("@s",sex);
                     cmd.Parameters.Add("@b",shengri);
                     cmd.Parameters.Add("@sub",zhuanyecode);
                    try
                    {
                    conn.Open();
                    cmd.ExecuteNonQuery();
                    conn.Close();
                    Console.Clear();
                    Console.WriteLine("添加成功!");
                        break;
                    }
                    catch
                    {
                        Console.WriteLine("连接数据库失败!请重新连接!");
                    }
                }
                else if(queding=="n"||queding=="N")
                {
                    Console.Clear();
                    break;
                }
                else
                {
                    Console.WriteLine("输入不正确!请重新输入!");
                }
            }
    
            }
            //修改
            public void xiugai(string bianhao)
            {
                string code, name, zhuanye,zhuanyecode,ss;
                bool sex;
                DateTime shengri;
                cmd.CommandText = "select * from Student where Code=@c";
                cmd.Parameters.Clear();
                cmd.Parameters.Add("@c",bianhao);
                    conn.Open();
                    SqlDataReader dr = cmd.ExecuteReader();
                    if (dr.HasRows)
                    {
                        dr.Read();
                        Student s = new Student();
                            s.Name = dr["Name"].ToString();
                            s.Sex = Convert.ToBoolean(dr["Sex"]);
                            s.Birthday = Convert.ToDateTime(dr["Birthday"]);
                            s.SsubjectCode = dr["SsubjectCode"].ToString();
    
                            conn.Close();
                            Console.WriteLine("已查询到"+bianhao+"的学生信息,请进行以下修改:");
                            Console.WriteLine(bianhao+"	"+s.Name+"	"+s.Sex+"	"+s.Birthday+"	"+s.SsubjectCode);
                            
                            Console.WriteLine(""+bianhao+"学生当前姓名为:"+s.Name+"");
                            while (true)
                            {
                                Console.Write("请输入修改后学生姓名(不能为空):");
                                string n = Console.ReadLine();
                                if (n == "")
                                {
                                    Console.WriteLine("用户名不能为空!请重新输入!");
                                }
                                else
                                {
                                    name = n;
                                    break;
                                }
                            }
                            Console.WriteLine("" + bianhao + "学生当前性别为:" + s.Sex + "");
                            while (true)
                            {
                                Console.Write("请输入您的修改学生性别(男/女):");
                                ss = Console.ReadLine();
                                if (ss == "")
                                {
                                    sex = true;
                                    break;
                                }
                                else if (ss == "")
                                {
                                    sex = false;
                                    break;
                                }
                                else
                                {
                                    Console.WriteLine("您的输入有误!只能输入男或女,请重新输入!");
                                }
                            }
                            Console.WriteLine("" + bianhao + "学生当前生日为:" + s.strbirthday + "");
                            while (true)
                            {
                                Console.Write("请输入修改学生生日(如2000/12/12):");
                                try
                                {
                                    DateTime ri = Convert.ToDateTime(Console.ReadLine());
                                    shengri = ri;
                                    break;
                                }
                                catch
                                {
                                    Console.WriteLine("您输入的生日格式不正确!请重新输入!");
                                }
                            }
                            Console.WriteLine("" + bianhao + "学生当前专业编号为:" + s.SsubjectCode + "");
                            while (true)
                            {
                                Console.Write("请输入修改后的学生专业:");
                                string z = Console.ReadLine();
                                cmd.CommandText = "select * from Ssubject where SsubjectName like @n";
                                cmd.Parameters.Clear();
                                cmd.Parameters.Add("@n", "%" + z + "%");
                                try
                                {
                                    conn.Open();
                                    SqlDataReader dr1 = cmd.ExecuteReader();
                                    if (dr1.HasRows)
                                    {
                                        dr1.Read();
                                        zhuanye = dr1["SsubjectName"].ToString();
                                        zhuanyecode = dr1["SsubjectCode"].ToString();
                                        conn.Close();
                                        break;
                                    }
                                    else
                                    {
                                        conn.Close();
                                        Console.WriteLine("没有该专业!请重新输入!");
                                    }
                                }
                                catch
                                {
                                    conn.Close();
                                    Console.WriteLine("连接数据库失败!请重新连接!");
                                }
                            }
                            Console.WriteLine(bianhao+ name + "	" + sex + "	" + shengri + "	" + zhuanye);
                            while (true)
                            {
                                Console.Write("以上为修改学生的信息,是否确定添加?(Y/N):");
                                string queding = Console.ReadLine();
                                if (queding == "y" || queding == "Y")
                                {
                                    cmd.CommandText = " update Student set Name=@x,Sex=@s,Birthday=@b,SsubjectCode=@sub where Code='"+bianhao +"'";
                                    cmd.Parameters.Clear();
                                    cmd.Parameters.Add("@x", name);
                                    cmd.Parameters.Add("@s", sex);
                                    cmd.Parameters.Add("@b", shengri);
                                    cmd.Parameters.Add("@sub", zhuanyecode);
                                   conn.Open();
                                        cmd.ExecuteNonQuery();
                                        conn.Close();
                                        Console.Clear();
                                        Console.WriteLine("修改成功!");
                                        break;
               
                                }
                                else if (queding == "n" || queding == "N")
                                {
                                    Console.Clear();
                                    break;
                                }
                                else
                                {
                                    Console.WriteLine("输入不正确!请重新输入!");
                                }
                            }
        
                    }
                    else
                    {
                        Console.WriteLine("没有该学生的信息!请重新输入");
                    }
            }
            //删除
            public void shanchu(string bianhao)
            {
                cmd.CommandText = "select * from Student where Code=@c";
                cmd.Parameters.Clear();
                cmd.Parameters.Add("@c",bianhao);
                conn.Open();
                SqlDataReader dr=cmd.ExecuteReader();
                if (dr.HasRows)
                {
                    dr.Read();
                    Student s = new Student();
                    s.Code = dr["Code"].ToString();
                    s.Name = dr["Name"].ToString();
                    s.Sex = Convert.ToBoolean(dr["Sex"]);
                    s.Birthday = Convert.ToDateTime(dr["Birthday"]);
                    s.SsubjectCode = dr["SsubjectCode"].ToString();
                    Console.WriteLine(bianhao + "	" + s.Name + "	" + s.Sex + "	" + s.Birthday + "	" + s.SsubjectCode);
                    conn.Close();
                    cmd.CommandText = "delete from student where Code=@cc";
                    cmd.Parameters.Clear();
                    cmd.Parameters.Add("@cc", bianhao);
                    conn.Open();
                    cmd.ExecuteNonQuery();
                    conn.Close();
                    Console.Clear();
                    Console.WriteLine("删除成功!");
                }
                else
                {
                    conn.Close();
                    Console.WriteLine("没有该学生信息请重新输入");
                }
    
                conn.Close();
            }
        }
    }
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using adoceshi.model;
    using System.Data.SqlClient;
    
    
    namespace adoceshi.dataopration
    {
        public class studentdata
        {
            SqlConnection conn = null;
            SqlCommand cmd = null;
            public studentdata()
            {
                conn = new SqlConnection("server=.;database=adoceshi;user=sa;pwd=123;");
                cmd = conn.CreateCommand();
            }
    
    
            public List<Student> selectall()
            {
                List<Student> list = new List<Student>();
    
                cmd.CommandText = "select * from Student";
                try
                {
                    conn.Open();
                    SqlDataReader dr = cmd.ExecuteReader();
                    if (dr.HasRows)
                    {
                        while (dr.Read())
                        {
                            Student s = new Student();
                            s.Code = dr["Code"].ToString();
                            s.Name = dr["Name"].ToString();
                            s.Sex = Convert.ToBoolean(dr["Sex"]);
                            s.Birthday = Convert.ToDateTime(dr["Birthday"]);
                            s.SsubjectCode = dr["SsubjectCode"].ToString();
    
                            list.Add(s);
                        }
                    }
                    conn.Close();
                }
                catch
                {
                    conn.Close();
                    Console.WriteLine("数据库连接失败!请重新连接!");
                }
                return list;
    
            }
            
            //用户操作
            //1新增
            public void xinzeng()
            {
                string code, name, zhuanye,zhuanyecode,s;
                bool sex;
                DateTime shengri;
                while (true)
                {
                    Console.Write("请输入学生编号:");
                    string c = Console.ReadLine();
                    cmd.CommandText = "select * from student where  Code=@c";
                    cmd.Parameters.Clear();
                    cmd.Parameters.Add("@c",c);
                    conn.Open();
                    SqlDataReader dr = cmd.ExecuteReader();
                    if (dr.HasRows)
                    {
    
                        conn.Close();
                        Console.WriteLine("您输入的学生编号已拥有,请重新输入!");
                    }
                    else
                    {
    
                        conn.Close();
                        code = c;
                        break;
                    }
                }
                while (true)
                {
                    Console.Write("请输入学生姓名(不能为空):");
                    string n = Console.ReadLine();
                    if (n == "")
                    {
                        Console.WriteLine("用户名不能为空!请重新输入!");
                    }
                    else
                    {
                        name = n;
                        break;
                    }
                }
                while (true)
                {
                    Console.Write("请输入学生性别(男/女):");
                   s = Console.ReadLine();
                    if (s == "")
                    {
                        sex = true;
                        break;
                    }
                    else if (s == "")
                    {
                        sex = false;
                        break;
                    }
                    else
                    {
                        Console.WriteLine("您的输入有误!只能输入男或女,请重新输入!");
                    }
                }
                while (true)
                {
                    Console.Write("请输入学生生日(如2000/12/12):");
                    try
                    {
                        DateTime ri = Convert.ToDateTime(Console.ReadLine());
                        shengri = ri;
                        break;
                    }
                    catch
                    {
                        Console.WriteLine("您输入的生日格式不正确!请重新输入!");
                    }
                }
                while (true)
                {
                    Console.Write("请输入学生专业:");
                    string z = Console.ReadLine();
                    cmd.CommandText = "select * from Ssubject where SsubjectName like @n";
                    cmd.Parameters.Clear();
                    cmd.Parameters.Add("@n", "%"+z+"%");
                  
                        conn.Open();
                        SqlDataReader dr = cmd.ExecuteReader();
                        if (dr.HasRows)
                        {
                            dr.Read();
                            zhuanye = dr["SsubjectName"].ToString();
                                zhuanyecode = dr["SsubjectCode"].ToString();
                            conn.Close();
                            break;
                        }
                        else
                        {
                            conn.Close();
                            Console.WriteLine("没有该专业!请重新输入!");
                        }
                }
                Console.WriteLine(code+"	"+name+"	"+s+"	"+shengri+"	"+zhuanye);
                while(true)
                {
                Console.Write("以上为新增学生的信息,是否确定添加?(Y/N):");
                string queding = Console.ReadLine();
                if(queding=="y"||queding=="Y")
                {
                    cmd.CommandText="insert into student values(@c,@x,@s,@b,@sub)";
                    cmd.Parameters.Clear();
                    cmd.Parameters.Add("@c",code);
                     cmd.Parameters.Add("@x",name);
                     cmd.Parameters.Add("@s",sex);
                     cmd.Parameters.Add("@b",shengri);
                     cmd.Parameters.Add("@sub",zhuanyecode);
                    try
                    {
                    conn.Open();
                    cmd.ExecuteNonQuery();
                    conn.Close();
                    Console.Clear();
                    Console.WriteLine("添加成功!");
                        break;
                    }
                    catch
                    {
                        Console.WriteLine("连接数据库失败!请重新连接!");
                    }
                }
                else if(queding=="n"||queding=="N")
                {
                    Console.Clear();
                    break;
                }
                else
                {
                    Console.WriteLine("输入不正确!请重新输入!");
                }
            }
    
            }
            //修改
            public void xiugai(string bianhao)
            {
                string code, name, zhuanye,zhuanyecode,ss;
                bool sex;
                DateTime shengri;
                cmd.CommandText = "select * from Student where Code=@c";
                cmd.Parameters.Clear();
                cmd.Parameters.Add("@c",bianhao);
                    conn.Open();
                    SqlDataReader dr = cmd.ExecuteReader();
                    if (dr.HasRows)
                    {
                        dr.Read();
                        Student s = new Student();
                            s.Name = dr["Name"].ToString();
                            s.Sex = Convert.ToBoolean(dr["Sex"]);
                            s.Birthday = Convert.ToDateTime(dr["Birthday"]);
                            s.SsubjectCode = dr["SsubjectCode"].ToString();
    
                            conn.Close();
                            Console.WriteLine("已查询到"+bianhao+"的学生信息,请进行以下修改:");
                            Console.WriteLine(bianhao+"	"+s.Name+"	"+s.Sex+"	"+s.Birthday+"	"+s.SsubjectCode);
                            
                            Console.WriteLine(""+bianhao+"学生当前姓名为:"+s.Name+"");
                            while (true)
                            {
                                Console.Write("请输入修改后学生姓名(不能为空):");
                                string n = Console.ReadLine();
                                if (n == "")
                                {
                                    Console.WriteLine("用户名不能为空!请重新输入!");
                                }
                                else
                                {
                                    name = n;
                                    break;
                                }
                            }
                            Console.WriteLine("" + bianhao + "学生当前性别为:" + s.Sex + "");
                            while (true)
                            {
                                Console.Write("请输入您的修改学生性别(男/女):");
                                ss = Console.ReadLine();
                                if (ss == "")
                                {
                                    sex = true;
                                    break;
                                }
                                else if (ss == "")
                                {
                                    sex = false;
                                    break;
                                }
                                else
                                {
                                    Console.WriteLine("您的输入有误!只能输入男或女,请重新输入!");
                                }
                            }
                            Console.WriteLine("" + bianhao + "学生当前生日为:" + s.strbirthday + "");
                            while (true)
                            {
                                Console.Write("请输入修改学生生日(如2000/12/12):");
                                try
                                {
                                    DateTime ri = Convert.ToDateTime(Console.ReadLine());
                                    shengri = ri;
                                    break;
                                }
                                catch
                                {
                                    Console.WriteLine("您输入的生日格式不正确!请重新输入!");
                                }
                            }
                            Console.WriteLine("" + bianhao + "学生当前专业编号为:" + s.SsubjectCode + "");
                            while (true)
                            {
                                Console.Write("请输入修改后的学生专业:");
                                string z = Console.ReadLine();
                                cmd.CommandText = "select * from Ssubject where SsubjectName like @n";
                                cmd.Parameters.Clear();
                                cmd.Parameters.Add("@n", "%" + z + "%");
                                try
                                {
                                    conn.Open();
                                    SqlDataReader dr1 = cmd.ExecuteReader();
                                    if (dr1.HasRows)
                                    {
                                        dr1.Read();
                                        zhuanye = dr1["SsubjectName"].ToString();
                                        zhuanyecode = dr1["SsubjectCode"].ToString();
                                        conn.Close();
                                        break;
                                    }
                                    else
                                    {
                                        conn.Close();
                                        Console.WriteLine("没有该专业!请重新输入!");
                                    }
                                }
                                catch
                                {
                                    conn.Close();
                                    Console.WriteLine("连接数据库失败!请重新连接!");
                                }
                            }
                            Console.WriteLine(bianhao+ name + "	" + sex + "	" + shengri + "	" + zhuanye);
                            while (true)
                            {
                                Console.Write("以上为修改学生的信息,是否确定添加?(Y/N):");
                                string queding = Console.ReadLine();
                                if (queding == "y" || queding == "Y")
                                {
                                    cmd.CommandText = " update Student set Name=@x,Sex=@s,Birthday=@b,SsubjectCode=@sub where Code='"+bianhao +"'";
                                    cmd.Parameters.Clear();
                                    cmd.Parameters.Add("@x", name);
                                    cmd.Parameters.Add("@s", sex);
                                    cmd.Parameters.Add("@b", shengri);
                                    cmd.Parameters.Add("@sub", zhuanyecode);
                                   conn.Open();
                                        cmd.ExecuteNonQuery();
                                        conn.Close();
                                        Console.Clear();
                                        Console.WriteLine("修改成功!");
                                        break;
               
                                }
                                else if (queding == "n" || queding == "N")
                                {
                                    Console.Clear();
                                    break;
                                }
                                else
                                {
                                    Console.WriteLine("输入不正确!请重新输入!");
                                }
                            }
        
                    }
                    else
                    {
                        Console.WriteLine("没有该学生的信息!请重新输入");
                    }
            }
            //删除
            public void shanchu(string bianhao)
            {
                cmd.CommandText = "select * from Student where Code=@c";
                cmd.Parameters.Clear();
                cmd.Parameters.Add("@c",bianhao);
                conn.Open();
                SqlDataReader dr=cmd.ExecuteReader();
                if (dr.HasRows)
                {
                    dr.Read();
                    Student s = new Student();
                    s.Code = dr["Code"].ToString();
                    s.Name = dr["Name"].ToString();
                    s.Sex = Convert.ToBoolean(dr["Sex"]);
                    s.Birthday = Convert.ToDateTime(dr["Birthday"]);
                    s.SsubjectCode = dr["SsubjectCode"].ToString();
                    Console.WriteLine(bianhao + "	" + s.Name + "	" + s.Sex + "	" + s.Birthday + "	" + s.SsubjectCode);
                    conn.Close();
                    cmd.CommandText = "delete from student where Code=@cc";
                    cmd.Parameters.Clear();
                    cmd.Parameters.Add("@cc", bianhao);
                    conn.Open();
                    cmd.ExecuteNonQuery();
                    conn.Close();
                    Console.Clear();
                    Console.WriteLine("删除成功!");
                }
                else
                {
                    conn.Close();
                    Console.WriteLine("没有该学生信息请重新输入");
                }
    
                conn.Close();
            }
        }
    }
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using adoceshi.model;
    using adoceshi.dataopration;
    
    namespace adoceshi
    {
        class Program
        {
            static void Main(string[] args)
            {
                while (true)
                {
                    //打印学生表
                    List<Student> data = new studentdata().selectall();
                    Console.WriteLine("编号" + "	" + "姓名" + "	" + "性别" + "	" + "年龄" + "	" + "生日" + "	" + "	" + "专业");
                    foreach (Student s in data)
                    {
                        Console.WriteLine(s.Code + "	" + s.Name + "	" + s.strsex + "	" + s.nianling + "	" + s.strbirthday + "	" + s.SsubjectName);
                    }
                    Console.WriteLine("--------------------------------------------------------------------------");
                    //用户操作
                    Console.Write("请输入您的操作数字(1=新增,2=修改,3=删除,4=退出):");
                    string caozuo = Console.ReadLine();
                    if(caozuo=="1")
                    {
                        studentdata z = new studentdata();
                        z.xinzeng();
                    }
                    else if (caozuo == "2")
                    {
                        Console.Write("请输入您要修改的学生的编号:");
                        string bianhao = Console.ReadLine();
                        studentdata g = new studentdata();
                        g.xiugai(bianhao);
                    }
                    else if (caozuo == "3")
                    {
                        Console.Write("请输入您要删除的学生的编号:");
                        string bianhao = Console.ReadLine();
                        studentdata g = new studentdata();
                        g.shanchu(bianhao);
                    }
                    else if (caozuo == "4")
                    {
                        break;
                    }
                    else 
                    {
                        Console.WriteLine("您的输入有误!请重新输入!");
                    }
    
    
                }
               
                Console.ReadKey();
            }
        }
    }

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  • 原文地址:https://www.cnblogs.com/xiao55/p/5628499.html
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