private void button3_Click(object sender, EventArgs e)
{
int flag = 0;
try
{
conn.Open();
string select_id = dataGridView1.SelectedRows[0].Cells[0].Value.ToString(); //选择的当前行第一列的值，也就是学生学号
string delete_by_id = "delete from student where stuxuehao=" + "'" + select_id + "'"; //sql删除语句,根据stuxuehao删除
SqlCommand cmd = new SqlCommand(delete_by_id, conn);
cmd.ExecuteNonQuery(); //执行命令
String sql = "insert into SysLog values ( '" + FrmLogin.getid() + "' , '" + DateTime.Now + "' , '" + "Delete student" + "')"; //编写SQL命令
SqlCommand sqlCommand = new SqlCommand(sql, conn); //记录日志
sqlCommand.ExecuteNonQuery();
}
catch
{
flag = 1;
MessageBox.Show("请正确选择行!", "ERROR", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
conn.Close();
}
this.studentTableAdapter.Fill(this.exampleDBDataSet4.student);//使其显示更新后的表
if (flag == 0)
{
MessageBox.Show("成功删除！", "Tips", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
}
}
private void button1_Click(object sender, EventArgs e)
{
conn.Open();
string sql = "";
if (textBox1.Text == "" || comboBox1.Text == "")
{
MessageBox.Show("请将信息填写完整！", "消息", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
else
{
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
string gender = radioButton1.Checked ? "女" : "男";
int mima = 123456;
sql = "insert into teacher(tname,teachpasswd,telephone,addr,teachsort,tsex)values('" + textBox1.Text.Trim() + "'," + mima + ",'" + textBox2.Text.Trim() + "','" + textBox3.Text.Trim() + "','" + comboBox1.Text.Trim() + "','" + gender + "')";
cmd.CommandText = sql;
cmd.ExecuteNonQuery();
MessageBox.Show("添加用户成功！");
}
sql = "insert into SysLog values ( '" + FrmLogin.getid() + "' , '" + DateTime.Now + "' , '" + "insert Teacher" + "')"; //编写SQL命令
SqlCommand sqlCommand = new SqlCommand(sql, conn); //记录日志
sqlCommand.ExecuteNonQuery();
conn.Close();
}
private void button2_Click(object sender, EventArgs e)
{
string sql;
conn.Open();
if (watermarkTextBox1.Text == "" || comboBox1.Text == "" || watermarkTextBox2.Text == "")
{
MessageBox.Show("请将信息填写完整！", "消息", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (radioButton1.Checked == false && radioButton2.Checked == false)
{
MessageBox.Show("请将信息填写完整！", "消息", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
else
{
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
string gender = radioButton1.Checked ? "女" : "男";
int mima = 123456;
sql = "insert into student(stuname,stupasswd,stugrade ,stubanji,stusex)values('" + watermarkTextBox1.Text.Trim() + "','" + mima + "','" + comboBox1.Text.Trim() + "','" + watermarkTextBox2.Text.Trim() + "','" + gender + "')";
cmd.CommandText = sql;
cmd.ExecuteNonQuery();
MessageBox.Show("添加用户成功！");
}
sql = "insert into SysLog values ( '" + FrmLogin.getid() + "' , '" + DateTime.Now + "' , '" + "insert Student" + "')"; //编写SQL命令
SqlCommand sqlCommand = new SqlCommand(sql, conn); //记录日志
sqlCommand.ExecuteNonQuery();
conn.Close();
}
private void button2_Click(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection(updatepswd.connectionString);
int flag = 0;
try
{
conn.Open();
string select_id = dataGridView1.SelectedRows[0].Cells[0].Value.ToString();//选择的当前行第一列的值，也就是课程号
string selectif = "select * from sctime where claid='" + select_id + "'";
SqlCommand sqlCommand = new SqlCommand(selectif, conn);
SqlDataReader sqlDataReader2 = sqlCommand.ExecuteReader();
if (sqlDataReader2.HasRows)
{
string real = "delete from sctime where claid=" + "'" + select_id + "'"; //sql删除语句
SqlCommand cmd1 = new SqlCommand(real, conn);
cmd1.ExecuteNonQuery(); //执行命令
/*BindingSource bindingSource = new BindingSource();
* bindingSource.DataSource = sqlDataReader;
* dataGridView1.DataSource = bindingSource;*/
}
else
{
string del = "delete from class where claid='" + select_id + "'";
SqlCommand sckb = new SqlCommand(del, conn);
sckb.ExecuteNonQuery();
}
String sql = "insert into SysLog values ( '" + FrmLogin.getid() + "' , '" + DateTime.Now + "' , '" + "Delete class" + "')"; //编写SQL命令
SqlCommand sqlComm = new SqlCommand(sql, conn); //记录日志
sqlComm.ExecuteNonQuery();
}
catch
{
flag = 1;
MessageBox.Show("请正确选择行!", "ERROR", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
conn.Close();
}
this.teachclass1TableAdapter.Fill(this.exampleDBDataSet9.teachclass1);//使其显示更新后的表
if (flag == 0)
{
MessageBox.Show("成功删除！", "Tips", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
}
}
private void button1_Click(object sender, EventArgs e)
{
string passwd = textBox2.Text;
string quepasswd = textBox3.Text;
SqlConnection sqlCnt = new SqlConnection(connectionString);
sqlCnt.Open();
if (passwd == "" || quepasswd == "")
{
MessageBox.Show("请将信息填写完整!");
}
else
{
if (quepasswd != passwd)
{
MessageBox.Show("两次输入的密码不一致!");
}
else
{
if (FrmLogin.getRole() == "学生")
{
SqlCommand command = new SqlCommand();
command.Connection = sqlCnt;
string sql = "update student set stupasswd ='" + passwd + "' where stuxuehao = '" + FrmLogin.getStudent() + "'";
command.CommandText = sql;
command.ExecuteNonQuery();
MessageBox.Show("修改密码成功！");
this.Close();
}
else if (FrmLogin.getRole() == "教师")
{
SqlCommand command = new SqlCommand();
command.Connection = sqlCnt;
string sql = "update Teacher set teachpasswd ='" + passwd + "' where teachbm = '" + FrmLogin.gettid() + "'";
command.CommandText = sql;
command.ExecuteNonQuery();
MessageBox.Show("修改密码成功！");
this.Close();
}
else
{
SqlCommand command = new SqlCommand();
command.Connection = sqlCnt;
string sql = "update Users set userpassword ='******' where userid = '" + FrmLogin.getid() + "'";
command.CommandText = sql;
command.ExecuteNonQuery();
MessageBox.Show("修改密码成功！");
this.Close();
}
}
sqlCnt.Close();
}
}
