按照順序進行展示，只展示重要代碼。
註冊、登錄界面：
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;
namespace Login
{
public partial class Form20 : Form
{
public Form20()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
this.Hide();
Form1 form1 = new Form1();
form1.ShowDialog();
this.Close();
}
private void button2_Click(object sender, EventArgs e)
{
this.Hide();
Form21 form21 = new Form21();
form21.ShowDialog();
this.Close();
}
private void button3_Click(object sender, EventArgs e)
{
Application.Exit();
}
private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
Form22 form22 = new Form22();
form22.Show();
}
private void linkLabel2_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
Form23 form23 = new Form23();
form23.Show();
}
}
}
註冊：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Login
{
public partial class Form22 : Form
{
private string Rcode;
private static char[] constant =
{ '0','1','2','3','4','5','6','7','8','9',
'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z',
'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'
};
public Form22()
{
InitializeComponent();
this.Randomcode();
}
public void Randomcode() //隨機生成驗證碼函數
{
int i;
Rcode = "";
Random rand = new Random();
for (i = 0; i < 4; i++)
{
Rcode += constant[rand.Next(0, 57)];
}
textBox6.Text = Rcode;
}
private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
this.Randomcode();
}
public static string EncryptWithMD5(string source)
{
byte[] sor = Encoding.UTF8.GetBytes(source);
MD5 md5 = MD5.Create();
byte[] result = md5.ComputeHash(sor);
StringBuilder strbul = new StringBuilder(40);
for (int i = 0; i < result.Length; i++)
{
strbul.Append(result[i].ToString("x2")); //加密結果"x2"結果爲32位,"x3"結果爲48位,"x4"結果爲64位
}
return strbul.ToString();
}
private void button1_Click(object sender, EventArgs e)
{
string code = textBox5.Text.Trim(); //驗證碼
code = code.ToUpper();
Rcode = Rcode.ToUpper();
if (code != Rcode)
{
MessageBox.Show("驗證碼錯誤！");
this.Randomcode();
}
else
{
if (label7.Text != "" || label8.Text != "")
{
MessageBox.Show("用戶名或密碼格式錯誤", "notice", MessageBoxButtons.OK, MessageBoxIcon.Error);
this.Randomcode();
}
else
{
if (textBox3.Text == "")
{
MessageBox.Show("學號不能爲空");
this.Randomcode();
}
else
{
if (textBox4.Text == "")
{
MessageBox.Show("電話號碼不能爲空");
this.Randomcode();
}
else
{
try
{
string connString = "Data Source=.;Initial Catalog=STU;Persist Security Info=True;User ID=sa;Password=******";//數據庫連接
SqlConnection connection = new SqlConnection(connString);
string sql = "insert into Utable (userid, password ,Stuno, phone) " +
"values (@userid, @password,@number,@phone)";
SqlCommand command = new SqlCommand(sql, connection);
SqlParameter sqlParameter = new SqlParameter("@userid", textBox1.Text);
command.Parameters.Add(sqlParameter);
sqlParameter = new SqlParameter("@password", EncryptWithMD5(textBox2.Text));
command.Parameters.Add(sqlParameter);
sqlParameter = new SqlParameter("@number", textBox3.Text);
command.Parameters.Add(sqlParameter);
sqlParameter = new SqlParameter("@phone", textBox4.Text);
command.Parameters.Add(sqlParameter);
//打開數據庫連接
connection.Open();
command.ExecuteNonQuery();
connection.Close();
MessageBox.Show("註冊成功");
this.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
}
}
}
private void textBox1_Leave(object sender, EventArgs e) //查詢該用戶名是否已經存在
{
string username = textBox1.Text.Trim();
string myConnString = "Data Source=.;Initial Catalog=STU;Persist Security Info=True;User ID=sa;Password=******";
SqlConnection sqlConnection = new SqlConnection(myConnString);
sqlConnection.Open();
string sql = "select userid from Utable where userid = '" + username + "'"; //編寫SQL命令
SqlCommand sqlCommand = new SqlCommand(sql, sqlConnection);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
if (sqlDataReader.HasRows)
{
label7.Text = "*該用戶名已經存在";
}
else
{
if (textBox1.Text.Trim() != "")
{
label7.Text = "";
}
else
{
label7.Text = "*用戶名不能爲空";
}
}
sqlConnection.Close();
}
private void textBox2_Leave(object sender, EventArgs e)
{
if (textBox2.Text.Trim() != "")
{
//使用regex（正則表達式）進行格式設置 至少有數字、大寫字母、小寫字母各一個。最少3個字符、最長20個字符。
Regex regex = new Regex(@"(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z]).{3,20}");
if (regex.IsMatch(textBox2.Text))//判斷格式是否符合要求
{
label8.Text = "";
}
else
{
label8.Text = "*至少包含數字、大小寫字母各一個。且不超過20個字符";
}
}
else
{
label8.Text = "*密碼不能爲空";
}
}
private void button2_Click(object sender, EventArgs e)
{
this.Hide();
Form20 form20 = new Form20(); //實例化
form20.ShowDialog(); //新打開窗體
this.Close(); //關閉當前窗體
}
}
}
選擇表
同時這裏有管理員可見的註冊用戶表的隱藏、顯示代碼，以此爲例。
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;
namespace Login
{
public partial class Form11 : Form
{
public Form11()
{
InitializeComponent();
if (Form21.UFlag == 1)
button5.Hide();
}
private void button1_Click(object sender, EventArgs e) //學生基本信息
{
this.Hide(); //隱藏當前窗體
Form4 form4 = new Form4(); //實例化
form4.ShowDialog(); //新打開窗體
this.Close(); //關閉當前窗體
}
private void button2_Click(object sender, EventArgs e) //學生課程
{
this.Hide(); //隱藏當前窗體
Form9 form9 = new Form9(); //實例化
form9.ShowDialog(); //新打開窗體
this.Close(); //關閉當前窗體
}
private void button3_Click(object sender, EventArgs e) //學生分數
{
this.Hide(); //隱藏當前窗體
Form10 form10 = new Form10(); //實例化
form10.ShowDialog(); //新打開窗體
this.Close(); //關閉當前窗體
}
private void button5_Click(object sender, EventArgs e) //用戶註冊信息
{
this.Hide(); //隱藏當前窗體
Form24 form24 = new Form24(); //實例化
form24.ShowDialog(); //新打開窗體
this.Close(); //關閉當前窗體
}
private void button4_Click(object sender, EventArgs e)
{
Application.Exit();
}
private void 製作名單ToolStripMenuItem_Click(object sender, EventArgs e)
{
MessageBox.Show("澪0炎"); }
private void toolStripMenuItem2_Click(object sender, EventArgs e)
{
MessageBox.Show("製作不易、請多包涵~");
}
private void Form11_Load(object sender, EventArgs e)
{
}
}
}
Student表：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Login
{
public partial class Form4 : Form
{
public Form4()
{
InitializeComponent();
if(Form21.UFlag == 1)
{
button2.Hide();
button3.Hide();
button4.Hide();
}
}
private void Form4_Load(object sender, EventArgs e)
{
// TODO: 這行代碼將數據加載到表“sTUDataSet3.Student”中。您可以根據需要移動或刪除它。
this.studentTableAdapter.Fill(this.sTUDataSet3.Student);
}
private void button1_Click(object sender, EventArgs e) //返回
{
this.Hide();
Form11 form11 = new Form11(); //實例化
form11.ShowDialog(); //新打開窗體
this.Close(); //關閉當前窗體
}
private void button6_Click(object sender, EventArgs e) //刷新
{
this.studentTableAdapter.Fill(this.sTUDataSet3.Student);
MessageBox.Show("刷新");
SqlConnection con = new SqlConnection("Data Source =.; Initial Catalog = STU; Persist Security Info = True; User ID = sa; Password = ******");
try
{
String select_by_id = "select * from Student";
con.Open();
SqlCommand sqlCommand = new SqlCommand(select_by_id, con);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = sqlDataReader;
dataGridView1.DataSource = bindingSource;
}
catch
{
MessageBox.Show("錯誤！請重新操作!");
}
finally
{
con.Close();
}
}
private void button2_Click(object sender, EventArgs e) //增
{
Form5 form5 = new Form5();
form5.Show();
}
private void button3_Click(object sender, EventArgs e) //刪
{
try
{
string select_id = dataGridView1.SelectedRows[0].Cells[0].Value.ToString(); //讀取改行第一列的值，即Sno主碼
Form6 form6 = new Form6(select_id);
form6.Show();
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
}
}
private void button4_Click(object sender, EventArgs e) //改
{
try
{
string select_id = dataGridView1.SelectedRows[0].Cells[0].Value.ToString(); //讀取改行第一列的值，即Sno主碼
Form7 form7 = new Form7(select_id);
form7.Show();
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
}
}
private void button5_Click(object sender, EventArgs e) //查
{
SqlConnection con = new SqlConnection("Data Source =.; Initial Catalog = STU; Persist Security Info = True; User ID = sa; Password = ******");
if (Form8.flag == 0) //按學號查詢
{
try
{
con.Open(); //打開
String select_by_id = "select * from Student where Sno='" + Form8.StuText + "'";
SqlCommand sqlCommand = new SqlCommand(select_by_id, con);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = sqlDataReader;
dataGridView1.DataSource = bindingSource;
MessageBox.Show("查詢結束後請刷新");
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
con.Close();
}
}
else if (Form8.flag == 1) //按姓名查詢
{
try
{
con.Open(); //打開
String select_by_name = "select * from Student where Sname='" + Form8.StuText + "'";
SqlCommand sqlCommand = new SqlCommand(select_by_name, con);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = sqlDataReader;
dataGridView1.DataSource = bindingSource;
MessageBox.Show("查詢結束後請刷新");
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
con.Close();
}
}
else if (Form8.flag == 2) //按性別查詢
{
try
{
con.Open(); //打開
String select_by_sex = "select * from Student where Ssex='" + Form8.StuSex + "'";
SqlCommand sqlCommand = new SqlCommand(select_by_sex, con);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = sqlDataReader;
dataGridView1.DataSource = bindingSource;
MessageBox.Show("查詢結束後請刷新");
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
con.Close();
}
}
else if (Form8.flag == 3) //按年齡查詢
{
try
{
con.Open(); //打開
String select_by_age = "select * from Student where Sage='" + Form8.StuText + "'";
SqlCommand sqlCommand = new SqlCommand(select_by_age, con);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = sqlDataReader;
dataGridView1.DataSource = bindingSource;
MessageBox.Show("查詢結束後請刷新");
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
con.Close();
}
}
else if (Form8.flag == 4) //按系別查詢
{
try
{
con.Open(); //打開
String select_by_dept = "select * from Student where Sdept='" + Form8.Studept + "'";
SqlCommand sqlCommand = new SqlCommand(select_by_dept, con);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = sqlDataReader;
dataGridView1.DataSource = bindingSource;
MessageBox.Show("查詢結束後請刷新");
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
con.Close();
}
}
}
private void button7_Click(object sender, EventArgs e) //查找方式
{
Form8 form8 = new Form8();
form8.Show();
}
}
}
course表：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Login
{
public partial class Form9 : Form
{
public Form9()
{
InitializeComponent();
if (Form21.UFlag == 1)
{
button2.Hide();
button3.Hide();
button4.Hide();
}
}
private void Form9_Load(object sender, EventArgs e)
{
// TODO: 這行代碼將數據加載到表“sTUDataSet1.Course”中。您可以根據需要移動或刪除它。
this.courseTableAdapter.Fill(this.sTUDataSet1.Course);
}
public static string select_id; //全局變量
private void button1_Click(object sender, EventArgs e) //返回
{
this.Hide();
Form11 form11 = new Form11(); //實例化
form11.ShowDialog(); //新打開窗體
this.Close(); //關閉當前窗體
}
private void button6_Click(object sender, EventArgs e) //刷新
{
this.courseTableAdapter.Fill(this.sTUDataSet1.Course);
MessageBox.Show("刷新");
SqlConnection con = new SqlConnection("Data Source =.; Initial Catalog = STU; Persist Security Info = True; User ID = sa; Password = ******");
try
{
String select_by_id = "select * from Course";
con.Open();
SqlCommand sqlCommand = new SqlCommand(select_by_id, con);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = sqlDataReader;
dataGridView1.DataSource = bindingSource;
}
catch
{
MessageBox.Show("錯誤！請重新操作!");
}
finally
{
con.Close();
}
}
private void button2_Click(object sender, EventArgs e) //增
{
Form12 form12 = new Form12();
form12.Show();
}
private void button3_Click(object sender, EventArgs e) //刪
{
try
{
select_id = dataGridView1.SelectedRows[0].Cells[0].Value.ToString(); //讀取改行第一列的值，即Cno主碼
Form13 form13 = new Form13();
form13.Show();
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
}
}
private void button4_Click(object sender, EventArgs e) //改
{
try
{
select_id = dataGridView1.SelectedRows[0].Cells[0].Value.ToString(); //讀取改行第一列的值，即Sno主碼
Form14 form14 = new Form14();
form14.Show();
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
}
}
private void button5_Click(object sender, EventArgs e) //查
{
SqlConnection con = new SqlConnection("Data Source =.; Initial Catalog = STU; Persist Security Info = True; User ID = sa; Password = ******");
if (Form15.flag == 0) //按課程號查詢
{
try
{
con.Open(); //打開
String select_by_id = "select * from Course where Cno='" + Form15.CouText + "'";
SqlCommand sqlCommand = new SqlCommand(select_by_id, con);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = sqlDataReader;
dataGridView1.DataSource = bindingSource;
MessageBox.Show("查詢結束後請刷新");
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
con.Close();
}
}
else if (Form15.flag == 1) //按姓名查詢
{
try
{
con.Open(); //打開
String select_by_name = "select * from Course where Cname='" + Form15.CouText + "'";
SqlCommand sqlCommand = new SqlCommand(select_by_name, con);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = sqlDataReader;
dataGridView1.DataSource = bindingSource;
MessageBox.Show("查詢結束後請刷新");
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
con.Close();
}
}
else if (Form15.flag == 2) //按學分查詢
{
try
{
con.Open(); //打開
String select_by_credit = "select * from Course where Ccredit='" + Form15.CouText + "'";
SqlCommand sqlCommand = new SqlCommand(select_by_credit, con);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = sqlDataReader;
dataGridView1.DataSource = bindingSource;
MessageBox.Show("查詢結束後請刷新");
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
con.Close();
}
}
}
private void button7_Click(object sender, EventArgs e) //查找方式
{
Form15 form15 = new Form15();
form15.Show();
}
}
}
SC表：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Login
{
public partial class Form10 : Form
{
public Form10()
{
InitializeComponent();
if (Form21.UFlag == 1)
{
button2.Hide();
button3.Hide();
button4.Hide();
}
}
private void Form10_Load(object sender, EventArgs e)
{
// TODO: 這行代碼將數據加載到表“sTUDataSet2.SC”中。您可以根據需要移動或刪除它。
this.sCTableAdapter.Fill(this.sTUDataSet2.SC);
}
public static string select_id; //全局變量
public static string select_cno;
private void button1_Click(object sender, EventArgs e) //返回
{
this.Hide();
Form11 form11 = new Form11(); //實例化
form11.ShowDialog(); //新打開窗體
this.Close(); //關閉當前窗體
}
private void button6_Click(object sender, EventArgs e) //刷新
{
this.sCTableAdapter.Fill(this.sTUDataSet2.SC);
MessageBox.Show("刷新");
SqlConnection con = new SqlConnection("Data Source =.; Initial Catalog = STU; Persist Security Info = True; User ID = sa; Password = ******");
try
{
String select_by_id = "select * from SC";
con.Open();
SqlCommand sqlCommand = new SqlCommand(select_by_id, con);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = sqlDataReader;
dataGridView1.DataSource = bindingSource;
}
catch
{
MessageBox.Show("錯誤！請重新操作!");
}
finally
{
con.Close();
}
}
private void button2_Click(object sender, EventArgs e)
{
Form16 form16 = new Form16();
form16.Show();
}
private void button3_Click(object sender, EventArgs e) //刪
{
try
{
select_id = dataGridView1.SelectedRows[0].Cells[0].Value.ToString(); //讀取改行第一列的值，即Sno主碼
select_cno = dataGridView1.SelectedRows[0].Cells[1].Value.ToString();//讀取改行第二列的值，即Cno主碼
Form17 form17 = new Form17();
form17.Show();
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
}
}
private void button4_Click(object sender, EventArgs e) //改
{
try
{
select_id = dataGridView1.SelectedRows[0].Cells[0].Value.ToString(); //讀取改行第一列的值，即Sno主碼
select_cno = dataGridView1.SelectedRows[0].Cells[1].Value.ToString();//讀取改行第二列的值，即Cno主碼
Form18 form18 = new Form18();
form18.Show();
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
}
}
private void button5_Click(object sender, EventArgs e) //查
{
SqlConnection con = new SqlConnection("Data Source =.; Initial Catalog = STU; Persist Security Info = True; User ID = sa; Password = ******");
if (Form19.flag == 0) //按學號查詢
{
try
{
con.Open(); //打開
String select_by_id = "select * from SC where Sno='" + Form19.SCText + "'";
SqlCommand sqlCommand = new SqlCommand(select_by_id, con);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = sqlDataReader;
dataGridView1.DataSource = bindingSource;
MessageBox.Show("查詢結束後請刷新");
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
con.Close();
}
}
else if (Form19.flag == 1) //按課序號查詢
{
try
{
con.Open(); //打開
String select_by_con = "select * from sc where Cno='" + Form19.SCText + "'";
SqlCommand sqlCommand = new SqlCommand(select_by_con, con);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = sqlDataReader;
dataGridView1.DataSource = bindingSource;
MessageBox.Show("查詢結束後請刷新");
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
con.Close();
}
}
else if (Form19.flag == 2) //按分數查詢
{
try
{
con.Open(); //打開
String select_by_grade = "select * from SC where Grade='" + Form19.SCText + "'";
SqlCommand sqlCommand = new SqlCommand(select_by_grade, con);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = sqlDataReader;
dataGridView1.DataSource = bindingSource;
MessageBox.Show("查詢結束後請刷新");
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
con.Close();
}
}
}
private void button7_Click(object sender, EventArgs e) //查找方式
{
Form19 form19 = new Form19();
form19.Show();
}
}
}
增、刪、改、查以Student表爲例：
增：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Login
{
public partial class Form5 : Form
{
private object studentTableAdapter;
private object sTUDENTDataSet1;
private object sinformationDataSet;
private object sTUDataSet3;
private string select_id;
public Form5()
{
InitializeComponent();
}
public Form5(string select_id)
{
this.select_id = select_id; //Sno主碼
}
private void button1_Click(object sender, EventArgs e)
{
string StuNum = textBox1.Text.Trim();
string StuName = textBox2.Text.Trim();
string StuSex = comboBox1.Text;
string StuAge = textBox3.Text.Trim();
string StuDept = comboBox2.Text;
SqlConnection con = new SqlConnection("Data Source =.; Initial Catalog = STU; Persist Security Info = True; User ID = sa; Password = ******");
try
{
con.Open(); //打開
string ComStr = "INSERT INTO Student(Sno, Sname, Ssex, Sage, Sdept)" + "VALUES ('" + StuNum + "','" + StuName + "','" + StuSex + "'," + StuAge + ",'" + StuDept + "')"; //SQL添加語句
SqlCommand cmd = new SqlCommand(ComStr, con);
cmd.ExecuteNonQuery(); //返回執行命令後影響的參數
MessageBox.Show("添加成功！請點擊“刷新”按鈕");
this.Close();
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
con.Close();
}
}
private void button2_Click(object sender, EventArgs e) //取消
{
this.Close();
}
}
}
刪：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Login
{
public partial class Form6 : Form
{
private string select_id;
public Form6()
{
InitializeComponent();
}
public Form6(string select_id) //參數
{
this.select_id = select_id;
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection("Data Source=.;Initial Catalog=STU;Persist Security Info=True;User ID=sa;Password=******");
try
{
con.Open();
string delete_by_id = "delete from Student where Sno=" + select_id; //SQL刪除語句
SqlCommand cmd = new SqlCommand(delete_by_id, con);
cmd.ExecuteNonQuery();
MessageBox.Show("刪除成功！請點擊“刷新”按鈕");
this.Close();
}
catch
{
MessageBox.Show("錯誤!請重新操作！");
}
finally
{
con.Close();
}
}
private void button2_Click(object sender, EventArgs e) //取消
{
this.Close();
}
}
}
改：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Login
{
public partial class Form7 : Form
{
private string select_id;
public Form7()
{
InitializeComponent();
}
public Form7(string select_id) //參數
{
this.select_id = select_id;
InitializeComponent();
textBox1.Text = select_id;
}
private void button1_Click(object sender, EventArgs e)
{
string StuNum = textBox1.Text.Trim();
string StuName = textBox2.Text.Trim();
string StuSex = comboBox1.Text;
string StuAge = textBox3.Text.Trim();
string StuDept = comboBox2.Text;
SqlConnection con = new SqlConnection("Data Source =.; Initial Catalog = STU; Persist Security Info = True; User ID = sa; Password = ******");
try
{
con.Open(); //打開
string ComStr = "UPDATE Student SET Sname='" + StuName + "',Ssex='" + StuSex + "',Sage=" + StuAge + ",Sdept='" + StuDept + "'" + " WHERE Sno='" + StuNum + "'"; //SQL添加語句
SqlCommand cmd = new SqlCommand(ComStr, con);
cmd.ExecuteNonQuery(); //返回執行命令後影響的參數
MessageBox.Show("修改成功！請點擊“刷新”按鈕");
this.Close();
}
catch
{
MessageBox.Show("錯誤！請重新操作！");
}
finally
{
con.Close();
}
}
private void button2_Click(object sender, EventArgs e)
{
this.Close();
}
}
}
查：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Login
{
public partial class Form8 : Form
{
public Form8()
{
InitializeComponent();
textBox1.Hide();
comboBox2.Hide();
comboBox3.Hide();
button3.Hide();
}
public static string StuText;
public static string StuSex;
public static string Studept;
public static int flag = -1;
private void button1_Click(object sender, EventArgs e) //選擇
{
string StuCombo = comboBox1.Text.Trim();
if (comboBox1.Text == "學號")
{
flag = 0;
textBox1.Show();
button3.Show();
}
else if (comboBox1.Text == "姓名")
{
flag = 1;
textBox1.Show();
button3.Show();
}
else if (comboBox1.Text == "性別")
{
flag = 2;
comboBox2.Show();
button3.Show();
}
else if (comboBox1.Text == "年齡")
{
flag = 3;
textBox1.Show();
button3.Show();
}
else if (comboBox1.Text == "系別")
{
flag = 4;
comboBox3.Show();
button3.Show();
}
MessageBox.Show("請輸入");
}
private void button3_Click(object sender, EventArgs e) //輸入、確定
{
StuText = textBox1.Text.Trim();
StuSex = comboBox2.Text.Trim();
Studept = comboBox3.Text.Trim();
MessageBox.Show("請點擊“查詢”按鈕查詢");
this.Close();
}
private void button2_Click(object sender, EventArgs e)
{
this.Close();
}
}
}
用戶註冊表：
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;
namespace Login
{
public partial class Form24 : Form
{
public Form24()
{
InitializeComponent();
}
private void Form24_Load(object sender, EventArgs e)
{
// TODO: 這行代碼將數據加載到表“sTUDataSet6.SysLog”中。您可以根據需要移動或刪除它。
this.sysLogTableAdapter.Fill(this.sTUDataSet6.SysLog);
// TODO: 這行代碼將數據加載到表“sTUDataSet5.Usertable”中。您可以根據需要移動或刪除它。
this.usertableTableAdapter.Fill(this.sTUDataSet5.Usertable);
// TODO: 這行代碼將數據加載到表“sTUDataSet4.Utable”中。您可以根據需要移動或刪除它。
this.utableTableAdapter.Fill(this.sTUDataSet4.Utable);
}
private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
MessageBox.Show("管理員邀請碼：123");
}
private void button2_Click(object sender, EventArgs e)
{
this.Hide();
Form11 form11 = new Form11(); //實例化
form11.ShowDialog(); //新打開窗體
this.Close(); //關閉當前窗體
}
}
}