private northwindEntities GetEmployees()
{
northwindEntities dc = new northwindEntities();
dataGridView1.DataSource = dc.Employees.ToArray();
return(dc);
}
private void button1_Click(object sender, EventArgs e)
{
northwindEntities dc = GetEmployees();
var query = (from emp in dc.Employees
select emp.Title).Distinct();
cboTitle.DataSource = EditTitle.DataSource = query.ToArray();
}
private void btnInsert_Click(object sender, EventArgs e)
{
Employees emp = new Employees();
emp.FirstName = txtFirstName.Text;
emp.LastName = txtLastName.Text;
emp.Title = cboTitle.Text;
northwindEntities dc = new northwindEntities();
dc.Employees.Add(emp);
dc.SaveChanges();
GetEmployees();
}
private void btnUpdate_Click(object sender, EventArgs e)
{
int RowIndex = dataGridView1.CurrentCell.RowIndex;
int EmployeeID = Convert.ToInt32(dataGridView1.Rows[RowIndex].Cells[0].Value);
northwindEntities dc = new northwindEntities();
Employees emp = dc.Employees.Find(EmployeeID);
emp.FirstName = EditFirstName.Text;
emp.LastName = EditLastName.Text;
emp.Title = EditTitle.Text;
dc.Entry(emp).State = EntityState.Modified;
dc.SaveChanges();
GetEmployees();
}
private void btnDelete_Click(object sender, EventArgs e)
{
if (MessageBox.Show("確定要刪除嗎?", "刪除確認", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
northwindEntities dc = new northwindEntities();
int EmployeeID = Convert.ToInt32(txtEmployeeID.Text);
Employees emp = dc.Employees.Find(EmployeeID);
if (emp == null)
{
MessageBox.Show(string.Format("找不到員工編號為{0}的記錄!", EmployeeID));
}
else
{
dc.Employees.Remove(emp);
dc.SaveChanges();
GetEmployees();
}
}
}
