从C＃Winforms在SQL数据库中仅保存日期，而不保存时间

Question

I'm having an issue with saving the time into my SQL database.

The system should save time and date to the database when the user scans into the building. At the current moment it saves date but time is saved as 00:00.

I had problems converting the date to SQL during the save process, so maybe i've made a mistake in the process. I've looked at it for ages and cant see why it wouldnt save the time as well.

Any ideas? here is the code in question

  var currentdate = DateTime.Now;
                    var TimeAccess = currentdate.Date.ToString("yyyy-MM-dd HH:mm:ss");
                    SqlCommand com = new SqlCommand();
                    com.Connection = new SqlConnection(Properties.Settings.Default.BioEngineering);
                    com.Connection.Open();

                    com.CommandText = "INSERT INTO AccessHistory (DoorID,UserID,TimeAccess,Status) VALUES (@DoorID,@UserID,@TimeAccess,@Status)";

                    com.Parameters.Add("@DoorID", SqlDbType.Int).Value = DoorNumber;
                    com.Parameters.Add("@UserID", SqlDbType.Int).Value = cboUserID.Text;
                    com.Parameters.Add("@TimeAccess", SqlDbType.DateTime).Value = TimeAccess;
                    com.Parameters.Add("@Status", SqlDbType.VarChar).Value = "Successful";

Thank you

Answer 1

如果您的数据库中有date或datetime类型的列，则不应更改其数据类型并将其转换为string ，而应将其直接传递给数据库：

com.Parameters.Add("@TimeAccess", SqlDbType.DateTime).Value = currentDate;

Answer 2

也许用DateTime代替第二行中的Date ：

var TimeAccess = currentdate.DateTime.ToString("yyyy-MM-dd HH:mm:ss");

Answer 3

You can directly pass DateTime.Now for command parameters and make sure database column is DateTime . That's It.

 com.Parameters.Add("@TimeAccess", SqlDbType.DateTime).Value = DateTime.Now;

You can remove below from your code as It is not required at all.

  var currentdate = DateTime.Now;
  var TimeAccess = currentdate.Date.ToString("yyyy-MM-dd HH:mm:ss");

Answer 4

               SqlCommand com = new SqlCommand();
                com.Connection = new SqlConnection(Properties.Settings.Default.BioEngineering);
                com.Connection.Open();

                com.CommandText = "INSERT INTO AccessHistory (DoorID,UserID,TimeAccess,Status) VALUES (@DoorID,@UserID,getdate(),@Status)";

                com.Parameters.Add("@DoorID", SqlDbType.Int).Value = DoorNumber;
                com.Parameters.Add("@UserID", SqlDbType.Int).Value = cboUserID.Text;
               com.Parameters.Add("@Status", SqlDbType.VarChar).Value = "Successful";

Use Getdate()