private void button2_Click(object sender, EventArgs e)
{
seleteForm2 f = new seleteForm2();
if (modify_studentID == null)
{
f.strr = dataGridView1.Rows[0].Cells[0].Value.ToString();
}
else
{
f.strr = modify_studentID;
}
this.Visible = false;
f.Visible = true;
this.Hide();
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
ComboboxItem item = comboBox1.Items[comboBox1.SelectedIndex] as ComboboxItem;
string a = item.Value.ToString();
if (a == "newForm2")
{
newForm2 f = new newForm2();
this.Visible = false;
f.Visible = true;
}
else if (a == "seleteForm2")
{
seleteForm2 f = new seleteForm2();
if (modify_studentID == null)
{
modify_studentID = dataGridView1.Rows[0].Cells[0].Value.ToString();
f.strr = modify_studentID;
}
else
{
f.strr = modify_studentID;
}
this.Visible = false;
f.Visible = true;
}
else if (a == "modifyForm2")
{
modifyForm2 f = new modifyForm2();
this.Visible = false;
if (modify_studentID == null)
{
f.strr = dataGridView1.Rows[0].Cells[0].Value.ToString();
f.aname = dataGridView1.Rows[0].Cells[1].Value.ToString();
f.fmodifyChinese = dataGridView1.Rows[0].Cells[2].Value.ToString();
f.fmodifyEnglish = dataGridView1.Rows[0].Cells[3].Value.ToString();
f.fmodifymathematics = dataGridView1.Rows[0].Cells[4].Value.ToString();
}
else
{
f.strr = modify_studentID;
f.aname = modify_name;
f.fmodifyChinese = modify_Chinese;
f.fmodifyEnglish = modify_English;
f.fmodifymathematics = modify_mathematics;
}
f.Visible = true;
}
else
{
string con, sql;
con = "Server=.\\SQLExpress;Database=School_information_system;Integrated Security=true";
sql = @"Delete From student WHERE StudentID = @value1;
Delete From DBsubject WHERE StudentID = @value2;";
SqlConnection mycon = new SqlConnection(con);
SqlCommand mySqlCmd = new SqlCommand(sql, mycon);
mycon.Open();
if (modify_studentID == null)
{
modify_studentID = dataGridView1.Rows[0].Cells[0].Value.ToString();//讀取dataGrideview第一行資料Rows橫、cells直
//MessageBox.Show(modify_studentID);//對話視窗
//MessageBox.Show("!");
mySqlCmd.Parameters.AddWithValue("@value1", modify_studentID);
mySqlCmd.Parameters.AddWithValue("@value2", modify_studentID);
mySqlCmd.ExecuteNonQuery();
Form1 f = new Form1();
this.Visible = false;
f.Visible = true;
}
else
{
mySqlCmd.Parameters.AddWithValue("@value1", modify_studentID);
mySqlCmd.Parameters.AddWithValue("@value2", modify_studentID);
mySqlCmd.ExecuteNonQuery();
Form1 f = new Form1();
this.Visible = false;
f.Visible = true;
}
mycon.Close();
}
}