登錄界面

代码：`

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using MySql.Data.MySqlClient;namespace STUMG
{public partial class Loginform : Form{public Loginform(){InitializeComponent();}//窗体加载private void Form1_Load(object sender, EventArgs e){MessageBox.Show("欢迎使用学生信息管理系统~", "提示");}//登录按钮功能private void btn_login_Click(object sender, EventArgs e){string username = this.txt_usr.Text;string userpassword = this.txt_pwd.Text;if (username.Equals("") || userpassword.Equals("")){MessageBox.Show("用户名或密码不能为空！");}else//验证是否和数据库密码对应{   //连接到要用的学生信息管理数据库string strcon = "server = localhost;port=3306;database = student;user=root;password=159753abcDEF";MySqlConnection con = new MySqlConnection(strcon);//一个参数连接数据库的try{con.Open();//打开通道string sqlSel = "Select * from student.user where userid='" + username + "' and userpwd='"+userpassword+"';";MySqlCommand com = new MySqlCommand(sqlSel,con);//用来执行查询命令MySqlDataAdapter check = new MySqlDataAdapter(com);//数据适配器DataSet datacheck = new DataSet();  //建立虚拟数据库int n = check.Fill(datacheck,"user");//在student.user 中执行查询命令返回值// MySqlDataReader sqldr = com.ExecuteReader();//数据读取进行比对if (n!=0)//说明的确存在{ MessageBox.Show("登陆成功！");this.DialogResult = DialogResult.OK;}else{MessageBox.Show("用户名或或密码错误,请重新输入!");}}catch (Exception ex){MessageBox.Show(ex.Message.ToString() + "打开数据库失败");}}}//密码显示方式private void checkBox1_CheckedChanged(object sender, EventArgs e){if (checkBox1.Checked){txt_pwd.PasswordChar = new char();}           elsetxt_pwd.PasswordChar = '*';}//回车键登陆private void txt_pwd_KeyDown(object sender, KeyEventArgs e){if (e.KeyCode == Keys.Enter){this.Focus();btn_login_Click(this, new EventArgs());}}private void btn_bk_Click(object sender, EventArgs e){MessageBox.Show("使用愉快~");this.Close();}//注册账号private void register_Click(object sender, EventArgs e){//如果点击注册账号则，弹出注册页面。Form3 register = new Form3();register.Show();}}
}

登录界面主要实现了登陆和注册两个功能；Form3是注册页
注册界面：

不做贅述，簡單的幾個控件。貼代碼

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using MySql.Data.MySqlClient;
namespace STUMG
{public partial class Form3 : Form{public Form3(){InitializeComponent();}//点击确认注册private void btn_rg_Click(object sender, EventArgs e){//取出数据string userid, userpwd, userRpwd;userid = this.txt_uid.Text;userpwd = this.txt_pd.Text;userRpwd = this.txt_rpd.Text;if (userid.Equals("" )|| userpwd.Equals("") || userRpwd.Equals(""))MessageBox.Show("请将信息填写完整");else{if ((userid.Length > 10 || userid.Length < 4)||(userpwd.Length>10||userpwd.Length<4)){MessageBox.Show("用户名和密码长度在4到10之间");this.txt_pd.Text = "";this.txt_rpd.Text = "";this.txt_uid.Text = "";}if(!userpwd.Equals(userRpwd))//两次输入密码不一致{this.txt_pd.Text = "";this.txt_rpd.Text = "";MessageBox.Show("两次输入密码不一致!");}//建立到数据库的链接string strcon = "server = localhost;port=3306;database = student;user=root;password=159753abcDEF";MySqlConnection con = new MySqlConnection(strcon);try{con.Open();//打开通道string strcheck = "select userid from student.user where userid='" + userid + "';";MySqlCommand cmd = new MySqlCommand(strcheck, con);//新建命令行   MySqlDataAdapter check = new MySqlDataAdapter();//数据适配器 DataSet datacheck = new DataSet();//虚拟表check.SelectCommand = cmd;//让适配器执行select语句int n = check.Fill(datacheck, "user");//要填充的虚拟表对象和数据库表名if (n != 0)//就是找到了和要创建的用户名一样的数据并放在了虚拟表里所以N不为零{MessageBox.Show("用户名已存在");}else{string strin = "insert into student.user(userid,userpwd) values ('" + userid + "','" + userpwd + "');";//插入语句FunSql ist = new FunSql();int x = ist.ExecuteUpdate(strin);//调用函数执行插入语句if (x != 0){MessageBox.Show("注册成功");this.Dispose();}elseMessageBox.Show("注册失败，请联系管理员");}}catch (Exception ex){MessageBox.Show(ex.Message.ToString() + "打开数据库失败");}}}}
}

主界面
佈局根據自己喜好佈局，主要用了PANEL來分割，但不是很理想。流佈局可能效果好一點，不過我還不太會用呢。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using MySql.Data.MySqlClient;namespace STUMG
{/// <summary>/// 主界面/// </summary>public partial class Mainform : Form{public Mainform(){InitializeComponent();}// 时间显示小事件private void timer1_Tick(object sender, EventArgs e){this.TMN.Text = DateTime.Now.ToString();}private int OK = 0;//主窗体退出提示private void Mainform_FormClosing(object sender, FormClosingEventArgs e){DialogResult result = MessageBox.Show("确认退出吗？", "退出程序",MessageBoxButtons.OKCancel, MessageBoxIcon.Information);//这个重载中可多个按钮if (result == DialogResult.OK){Dispose();Application.Exit();//停止所有消息并且关闭所有应用窗口}elsee.Cancel = true;}//主窗体加载private void Mainform_Load(object sender, EventArgs e){//调用编写的功能类FunSql Dog = new FunSql();//这只狗就可以用来增删查改，现在查询，用来显示数据String sqlsel = "select * from student.stuinfo;";dataGridView1.DataSource = Dog.ExecuteQuery(sqlsel);//调用类方法查询！绑定datagridview1数据源}//查询功能private void btn_src_Click(object sender, EventArgs e){string tbname, fdname, fdid;tbname = this.txttab.Text;fdname = this.txtnm.Text;fdid = this.txtid.Text;FunSql Dog = new FunSql();string sqlsel;//用于保存Mysql语句//默认点击查询显示Stuinfo表格信息//模糊查询if(tbname.Equals("")){if (!fdname.Equals("") && !fdid.Equals(""))sqlsel = "select * from stuinfo where 学号 like'%" + fdid + "%' and 姓名 like'%" + fdname + "%';";else if (!fdid.Equals(""))sqlsel = "select * from stuinfo where 学号 like'%" + fdid + "%';";else if (!fdname.Equals(""))sqlsel = "select * from stuinfo where 姓名 like'%" + fdname + "%';";elsesqlsel = "select * from stuinfo;";this.dataGridView1.DataSource = Dog.ExecuteQuery(sqlsel);}else{if (!fdname.Equals("") && !fdid.Equals(""))sqlsel = "select * from "+tbname+" where 学号 like'%" + fdid + "%' and 姓名 like'%" + fdname + "%';";else if (!fdid.Equals(""))sqlsel = "select * from "+tbname+" where 学号 like'%" + fdid + "%';";else if (!fdname.Equals(""))sqlsel = "select * from "+tbname+" where 姓名 like'%" + fdname + "%';";elsesqlsel = "select * from "+tbname+";";this.dataGridView1.DataSource = Dog.ExecuteQuery(sqlsel);}}//添加数据  private void btn_add_Click(object sender, EventArgs e){string tbname, fdname, fdid,fdold,fdsex,fdtel,fdqq;//信息表数据string fmath, fch, feg, fph;//成绩表数据 string sqlinsert;//要插入数据tbname = this.txttab.Text;fdname = this.txtnm.Text;fdid = this.txtid.Text;fdold = this.txtod.Text;fdsex = this.txtsex.Text;fdtel = this.txttel.Text;fdqq = this.txtqq.Text;//分割      fmath = this.txtmath.Text;fch = this.txtch.Text;feg = this.txteg.Text;fph = this.txtph.Text;//FunSql Dog = new FunSql();FunSql Cat = new FunSql();//更新数据用string messup = "select * from student." + tbname + ";";//用于更新数据显示if (tbname.Equals(""))MessageBox.Show("请输入要操作的表！");else{//处理未知表if(!tbname.Equals("exam")&&!tbname.Equals("stuinfo")){MessageBox.Show("该表不可用");this.txtnm.Text = "";}if(tbname.Equals("exam")){//插入数据if (fdid.Equals("") || fdname.Equals("") || fmath.Equals("") || feg.Equals("") || fph.Equals("")||fch.Equals(""))MessageBox.Show("亲~数据要全部填满哦~");else{sqlinsert = "insert into student.exam values(" + fdid + ",'" + fdname + "'," + "'" + fmath + "'," + fch + ",'" + feg + "'," + fph + ");";int i = Dog.ExecuteUpdate(sqlinsert);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，影响了{0}条数据", i.ToString());}}else if (tbname.Equals("stuinfo")){if (fdid.Equals("") || fdold.Equals("") || fdsex.Equals("") || fdtel.Equals("") || fdqq.Equals("")||fdname.Equals(""))MessageBox.Show("亲~数据要全部填满哦~");else{sqlinsert = "insert into student.stuinfo values(" + fdid + ",'" + fdname + "'," + "'" + fdsex + "'," + fdold + ",'" + fdtel + "'," + fdqq + ");";int i = Dog.ExecuteUpdate(sqlinsert);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，影响了{0}条数据", i.ToString());}}}}//删除数据private void btn_del_Click(object sender, EventArgs e){string tbname, delid,delname;tbname = txttab.Text;delid = txtid.Text;delname = txtnm.Text;FunSql Dog = new FunSql();FunSql Cat = new FunSql();string sqldel;string messup = "select * from student." + tbname + ";";//用于更新数据显示if (!tbname.Equals("") &&(delid.Equals("") || delname.Equals(" "))||tbname.Equals(""))MessageBox.Show("请务必填写完整表名(学号或姓名至少一项）");else{//处理未知表if (!tbname.Equals("exam") && !tbname.Equals("stuinfo")){MessageBox.Show("该表不可用");this.txtnm.Text = "";}if (tbname.Equals("stuinfo")){if(!delid.Equals("")&&delname.Equals(""))sqldel = "delete from student.stuinfo where 学号='" + delid + "';";else if(delid.Equals("") && !delname.Equals(""))sqldel = "delete from student.stuinfo where 姓名='" + delname + "';";elsesqldel = "delete from student.stuinfo where 姓名='" + delname + "' and 学号='"+delid+"';";int i = Dog.ExecuteUpdate(sqldel);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，影响了{0}条数据", i.ToString());}else if(tbname.Equals("exam")){if (!delid.Equals("") && delname.Equals(""))sqldel = "delete from student.stuinfo where 学号='" + delid + "';";else if (delid.Equals("") && !delname.Equals(""))sqldel = "delete from student.stuinfo where 姓名='" + delname + "';";elsesqldel = "delete from student.stuinfo where 姓名='" + delname + "' and 学号='" + delid + "';";int i = Dog.ExecuteUpdate(sqldel);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，影响了{0}条数据", i.ToString());}}}///成绩和学号以及年龄排序 private void button1_Click(object sender, EventArgs e){string tbname;string method;string sqlarr;//排序语句tbname = txttab.Text;method = txtmd.Text;FunSql Dog = new FunSql();//用来调用查询函数if (tbname.Equals(""))MessageBox.Show("请务必确定排序哪个表中数据");else{   if(tbname.Equals("stuinfo")){if (method.Equals("数学") || method.Equals("语文") || method.Equals("英语")|| method.Equals("物理"))MessageBox.Show("学生信息表中只能按学号或年龄排序");else{if (OK == 1)//OK为1的时候升序排序{sqlarr = "select * from " + tbname + " order by " + method + " ASC";this.dataGridView1.DataSource = Dog.ExecuteQuery(sqlarr);}else{sqlarr = "select * from " + tbname + " order by " + method + " DESC";this.dataGridView1.DataSource = Dog.ExecuteQuery(sqlarr);}}    }///多加表之后可以在这里更改代码else if(tbname.Equals("exam")){if (!method.Equals("年龄") && !method.Equals("学号") && !method.Equals("数学") && !method.Equals("语文") && !method.Equals("英语")&& !method.Equals("物理")){MessageBox.Show("只有学号、姓名、年龄和成绩才是关键词哦！");this.txtmd.Text = "";}else{if (OK == 1)//OK为1的时候升序排序{sqlarr = "select * from " + tbname + " order by " + method + " ASC";this.dataGridView1.DataSource = Dog.ExecuteQuery(sqlarr);}else{sqlarr = "select * from " + tbname + " order by " + method + " DESC";this.dataGridView1.DataSource = Dog.ExecuteQuery(sqlarr);}}}}}//选择排序方式private void checkBox1_CheckedChanged(object sender, EventArgs e){if (checkBox1.Checked)OK = 1;elseOK = 0;}//修改功能  private void btn_rvs_Click(object sender, EventArgs e){string check;string sqlrvs;string tbnm, id, old, sex, nm, qq, tel, mth, eg, ch, ph;tbnm = this.txttab.Text;id = this.txtid.Text;old = this.txtod.Text;sex = this.txtsex.Text;nm = this.txtnm.Text;qq = this.txtqq.Text;tel = this.txttel.Text;mth = this.txtmath.Text;eg = this.txteg.Text;ch = this.txtch.Text;ph = this.txtph.Text;check = this.txt_rvs.Text;string messup = "select * from student." + tbnm + ";";//用于更新数据显示FunSql Dog = new FunSql();FunSql Cat = new FunSql();if (tbnm.Equals(""))MessageBox.Show("请务必填写完整表名");else{if (!tbnm.Equals("exam") && !tbnm.Equals("stuinfo")){MessageBox.Show("该表不可用");this.txtnm.Text = "";}if(id.Equals("")){MessageBox.Show("学号为必填项,其余根据表选");}else{if(tbnm.Equals("stuinfo")){if (!nm.Equals("") && !old.Equals("") && !sex.Equals("") && !tel.Equals("") && !qq.Equals("")){sqlrvs = "update stuinfo" +" set 学号='" + id + "',姓名='" + nm + "',性别='"+ sex + "',年龄='" + old + "',电话='" + tel + "',QQ='"+ qq + "' where 学号='" + check + "';";int i = Dog.ExecuteUpdate(sqlrvs);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，影响了{0}条数据", i.ToString());}elseMessageBox.Show("请填满表中所有信息，谢谢");}else{if (!nm.Equals("") && !id.Equals("") && !mth.Equals("") && !eg.Equals("") && !ch.Equals("") && !ph.Equals("")){sqlrvs = "update stuinfo" +" set 学号='" + id + "',姓名='" + nm + "',数学='"+ mth + "',物理='" + ph + "',英语='" + eg + "',语文='"+ ch + "' where 学号='" + check + "';";int i = Dog.ExecuteUpdate(sqlrvs);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，影响了{0}条数据", i.ToString());}elseMessageBox.Show("请填满表中所有信息，谢谢");}}}}//批量删除private void button2_Click(object sender, EventArgs e){string tbnm = this.txttab.Text;string one, two, three, four;string sqldel,messup;string sqldel1, sqldel2, sqldel3;one = this.txt_id1.Text;two = this.txt_id2.Text;three = this.txt_id3.Text;four = this.txt_id4.Text;messup = "select * from student." + tbnm + ";";FunSql Dog = new FunSql();FunSql Cat = new FunSql();if (tbnm.Equals(""))MessageBox.Show("请务必填写完整表名");else{if (!tbnm.Equals("exam") && !tbnm.Equals("stuinfo")){MessageBox.Show("该表不可用");this.txtnm.Text = "";}//缺少至少两项的判断情况if (one.Equals("") && two.Equals("") && three.Equals("") && four.Equals(""))MessageBox.Show("批量删除请至少删除一项");else{if(!one.Equals("")&&two.Equals("")&&!three.Equals("")&&!four.Equals("")){sqldel = "delete from " + tbnm + " where 学号='" + one + "';";Dog.ExecuteUpdate(sqldel);sqldel1 = "delete from " + tbnm + " where 学号='" + two + "';";Dog.ExecuteUpdate(sqldel1);sqldel2 = "delete from " + tbnm + " where 学号='" + three + "';";Dog.ExecuteUpdate(sqldel2);sqldel3 = "delete from " + tbnm + " where 学号='" + four + "';";Dog.ExecuteUpdate(sqldel3);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，删除了四条数据");}else if(!one.Equals("") && !two.Equals("") && three.Equals("") && four.Equals(""))//1和2{sqldel = "delete from " + tbnm + " where 学号='" + one + "';";Dog.ExecuteUpdate(sqldel);sqldel1 = "delete from " + tbnm + " where 学号='" + two + "';";Dog.ExecuteUpdate(sqldel1);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，删除了两条数据");}else if(!one.Equals("") && two.Equals("") && !three.Equals("") && four.Equals(""))//1 3{sqldel = "delete from " + tbnm + " where 学号='" + one + "';";Dog.ExecuteUpdate(sqldel);sqldel2 = "delete from " + tbnm + " where 学号='" + three + "';";Dog.ExecuteUpdate(sqldel2);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，删除了两条数据");}else if(!one.Equals("") && two.Equals("") && three.Equals("") && !four.Equals(""))// 1 4{sqldel = "delete from " + tbnm + " where 学号='" + one + "';";Dog.ExecuteUpdate(sqldel);sqldel3 = "delete from " + tbnm + " where 学号='" + four + "';";Dog.ExecuteUpdate(sqldel3);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，删除了两条数据");}else if(one.Equals("") && !two.Equals("") && !three.Equals("") && four.Equals(""))// 2 3{sqldel1 = "delete from " + tbnm + " where 学号='" + two + "';";Dog.ExecuteUpdate(sqldel1);sqldel2 = "delete from " + tbnm + " where 学号='" + three + "';";Dog.ExecuteUpdate(sqldel2);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，删除了两条数据");}else if(one.Equals("") && !two.Equals("") && three.Equals("") && !four.Equals(""))// 2 4{sqldel1 = "delete from " + tbnm + " where 学号='" + two + "';";Dog.ExecuteUpdate(sqldel1);sqldel3 = "delete from " + tbnm + " where 学号='" + four + "';";Dog.ExecuteUpdate(sqldel3);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，删除了两条数据");}else if(one.Equals("") && two.Equals("") && !three.Equals("") && !four.Equals(""))//3 4{sqldel2 = "delete from " + tbnm + " where 学号='" + three + "';";Dog.ExecuteUpdate(sqldel2);sqldel3 = "delete from " + tbnm + " where 学号='" + four + "';";Dog.ExecuteUpdate(sqldel3);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，删除了两条数据");}else if(!one.Equals("") && !two.Equals("") && !three.Equals("") && four.Equals(""))//1 2 3{sqldel = "delete from " + tbnm + " where 学号='" + one + "';";Dog.ExecuteUpdate(sqldel);sqldel1 = "delete from " + tbnm + " where 学号='" + two + "';";Dog.ExecuteUpdate(sqldel1);sqldel2 = "delete from " + tbnm + " where 学号='" + three + "';";Dog.ExecuteUpdate(sqldel2);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，删除了三条数据");}else if(!one.Equals("") && !two.Equals("") && three.Equals("") && !four.Equals(""))//1 2 4{sqldel = "delete from " + tbnm + " where 学号='" + one + "';";Dog.ExecuteUpdate(sqldel);sqldel1 = "delete from " + tbnm + " where 学号='" + two + "';";Dog.ExecuteUpdate(sqldel1);sqldel3 = "delete from " + tbnm + " where 学号='" + four + "';";Dog.ExecuteUpdate(sqldel3);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，删除了三条数据");}else if(!one.Equals("") && two.Equals("") && !three.Equals("") && !four.Equals(""))//134{sqldel = "delete from " + tbnm + " where 学号='" + one + "';";Dog.ExecuteUpdate(sqldel);sqldel2 = "delete from " + tbnm + " where 学号='" + three + "';";Dog.ExecuteUpdate(sqldel2);sqldel3 = "delete from " + tbnm + " where 学号='" + four + "';";Dog.ExecuteUpdate(sqldel3);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，删除了三条数据");}else if(one.Equals("") && !two.Equals("") && !three.Equals("") && !four.Equals(""))//234{sqldel1 = "delete from " + tbnm + " where 学号='" + two + "';";Dog.ExecuteUpdate(sqldel1);sqldel2 = "delete from " + tbnm + " where 学号='" + three + "';";Dog.ExecuteUpdate(sqldel2);sqldel3 = "delete from " + tbnm + " where 学号='" + four + "';";Dog.ExecuteUpdate(sqldel3);this.dataGridView1.DataSource = Cat.ExecuteQuery(messup);MessageBox.Show("更新成功，删除了三条数据");}}}}private void button3_Click(object sender, EventArgs e){this.txt_id1.Text = "";this.txt_id2.Text = "";this.txt_id3.Text = "";this.txt_id4.Text = "";this.txt_rvs.Text = "";this.txtqq.Text = "";this.txtsex.Text = "";this.txttab.Text = "";this.txttel.Text = "";this.txtph.Text = "";this.txtod.Text = "";this.txtnm.Text = "";this.txtmd.Text = "";this.txtmath.Text = "";this.txtid.Text = "";this.txteg.Text = "";this.txtch.Text = "";}} }

這裏就是主要功能了，因爲時間原因，我的數據庫表只用3張彪，兩張關於學生信息的一張是程序賬號的。交互性還有很大提升空間，功能上也有一些不盡人意的地方，有些小瑕疵，跟學校的比起來天壤之別。路還很長，且行且勉勵

重要的數據庫連接知識

小學期的課設計不合理，這對一個吹學者來説真的很不友好，C#還沒掌握多少，卻被告知實驗内容用到數據庫知識。
但是那種每天擠出時間去自學知識的過程真的很愉悅，大學生活的平淡帶來的無趣感業被衝淡了不少。這裏就寫下一
些基本的數據庫操作吧，還有連接VS的方法。

關於Mysql的安裝:

其實我們要在VS中調用Mysql需要的是它的動態鏈接庫Mysql.dll。网上的安装包也很多，不过去官网下还是最好的，这里推荐
去官网下载安装包文件，而不是现成的压缩包（可能存在环境变量配置问题）。
附上链接[官网的页面](https://dev.mysql.com/downloads/windows/installer/8.0.html)
安装就不详说了，没必要，中间有一个设置超级用户密码的过程，自己设置好记住就行，后面要用。

环境变量的配置

安装完后，或者压缩包解压后
这个也挺简单，右键你的电脑，找搞基（嘿嘿）系统设置，找到环境变量设置，然后看path有没有自动添加Mysql
没有的话要把路径设置为Mysql的bin文件；有上下两个栏，直接在下面编辑（新建）就OK，与Java配置差不多啦。

Mysql 启程！

Command Line Client是直接打開Mysql命令行，進入界面后就可以自己開啓Mysql旅程啦！
下面的自然是应用程序了，相比命令行当然界面好多了，不过就和MATLAB一样操作终归还是在Command Line里进行的。
博主在挣扎学习的时候，用的是命令行，现在感觉心情美美哒。
至于你问我Mysql语法？呃，中国大学MOOC欢迎您,同学！
基本语法会在下篇单独写。

Funsql类

在明白C#代码如何进行数据库操作的原理后，我产生了将功能函数（方法）封装的想法，毕竟进行增删查改等操作需要先联通数据库。这个过程中也是磕磕绊绊，说多了都是泪，进入不少误区。下面分享一下代码，也是借鉴CSDN多位博主代码综合出来的，至于多到什么程度呢…多到我已经想不起来看了多少篇博文：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MySql.Data.MySqlClient;
using System.Data;
//包含连接数据库，增删查改等方法的功能类
namespace STUMG
{class FunSql{// private string url = "server = localhost;port=3306;database = student;user=root;password=159753abcDEF";//查询public DataTable ExecuteQuery(string sqlstr){//这个就是命令行执行string url = "server = localhost;port=3306;database = student;user=root;password=159753abcDEF";MySqlCommand cmd;//这个是用来建立数据库连接的类    MySqlConnection con;//包含sql语句执行的结果，并提供一个方法从结果中阅读一行MySqlDataAdapter msda;//建立虚拟表DataTable dt = new DataTable();//上面两个配合使用，先建立连接后通过执行sqlstr语句//得到msda数据，然后这个数据填充在虚拟表dt中，最终返回数据con = new MySqlConnection(url);con.Open();//接通数据库cmd = new MySqlCommand(sqlstr, con);//执行查询语句，sqlstr从点击中来cmd.CommandType = CommandType.Text;//用文本形式解释命令行字符串；msda = new MySqlDataAdapter(cmd);//SELECT命令作为数据更新参数msda.Fill(dt);con.Close();//关闭链接return dt;}//增删改public int ExecuteUpdate(string sqlstr){string url = "server = localhost;port=3306;database = student;user=root;password=159753abcDEF";MySqlConnection con = new MySqlConnection(url);con.Open();//接通数据库MySqlCommand cmd = new MySqlCommand(sqlstr, con);//cmd命令在这里得到相应命令// cmd.CommandType = CommandType.Text;//用文本形式解释命令行字符串；int exeresult = 0;exeresult = cmd.ExecuteNonQuery();//直接对数据库中数据动手return exeresult;//返回的是处理数据个数}}
}

这里的两个类方法想想其实挺有意思的，尤其是当查到Mysqlcomm 类方法executenonquery时，真的爽死了，这也太强了叭，反正本萌新被震慑到了，hhhh

总结

收获挺多，继续努力。然后这个就是自己无聊，然后写出来记录离校前的时光的，天气好热啊，又没有知心人解闷。还是创建对象玩好了… 咳咳，代码只是提供一个思路，里面还是有很多bug的，而且局限性真的很大，说白了就是交作业，嘿嘿…我要回家。
感兴趣的可以CSDN发消息找我唠啊，虽然不知道能不能发。

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C#Mysql学生信息管理系统

C#学生信息管理系统连接到Mysql数据库