如何在datagridview中設置選定的單元格值並將其插入數據庫中？

Question

我有一個datagridview，我想從其中選擇要插入表格的Employee Id值。我有兩個表，Employee具有雇員id（主鍵），雇員姓名和Attendance具有雇員id（FK），日期，預期時間，進入時間和時間狀態。 我想插入一個由員工ID完成的員工出勤記錄。 因此，如果我選擇單元格（員工ID），則將為該特定Employee插入。

這是設置值的代碼：

private void button2_Click(object sender, EventArgs e)
    {
        Attendance att = new Attendance();
        int id;

        try
        {
            att.SetEmployeeId(id = Convert.ToInt32(dataGridView1.CurrentCell));
            att.SetWorkDate(work_date_picker.Text);
            att.SetExpectedTime(expected_time_picker.Text);
            att.SetTimeIn(time_in_picker.Text);
            Database database = new Database();
            database.OpenConnection();
            database.AddAttendancetable(att);
            database.CloseConnection();

        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
        this.Close();
    }

這是我的數據庫操作代碼：

   public bool AddAttendanceToTable(Attendance rowtosave, SqlConnection conn, 
        SqlCommand cmd)
   {

        Trace.WriteLine("saving to table");
        cmd.CommandText = "Insert Into Attendance 
        (emp_id,work_date,expected_time,time_in) 
        values(@emp_id,@work_date,@expected_time,@time_in)";
        cmd.Parameters.AddWithValue("@emp_id", rowtosave.GetEmployeeId());
        cmd.Parameters.AddWithValue("@work_date", rowtosave.GetWorkDate());
        cmd.Parameters.AddWithValue("@expected_time", 
         rowtosave.GetExpectedTime());
        cmd.Parameters.AddWithValue("@time_in", rowtosave.GetTimeIn());
        try
        {
            cmd.Connection = conn;
            cmd.ExecuteReader();
            MessageBox.Show("Data Added Successfully");

        }
        catch (Exception e)
        {
            MessageBox.Show(e.ToString());
        }

        return true;
    }

    void AddAttendancetable(Attendance 
    attendance)
    {
        AddAttendance addAttendance = new 
        AddAttendance();
     addAttendance.AddAttendanceToTable
   (attendance,conn, cmd);
              }

我遇到了無法將datagridview textboxcell強制轉換為類型system的錯誤。

Answer 1

這對我有用

    if (dataGridView1.SelectedCells.Count >0)                                         

            {
                int selectedrowindex = dataGridView1.SelectedCells[0].RowIndex;

                DataGridViewRow selectedRow = dataGridView1.Rows[selectedrowindex];

                att.SetEmployeeId(id = Convert.ToInt32(selectedRow.Cells["emp_id"].Value));
                att.SetWorkDate(work_date_picker.Text);
                att.SetExpectedTime(expected_time_picker.Text);
                att.SetTimeIn(time_in_picker.Text);
                Database database = new Database();
                database.OpenConnection();
                database.AddAttendancetable(att);
                database.CloseConnection();
            }