从文本框中获取输入并将其插入 mysql 数据库时，如何更正我的日期时间值？

Question

I keep getting this error from visual studio when I insert a date value into my database

MySql.Data.MySqlClient.MySqlException: 'Incorrect datetime value: '0014-04-2021''

I changed my DateTime picker format to short so that it doesn't include the time when it takes the value from the DateTime picker but the problem still persists.

this is my SQL query code

MySqlCommand cmd = new MySqlCommand("insert into inventory.vehicle(regdate) values(@regdate)", conn);

cmd.Parameters.Add("@regdate", MySqlDbType.Date).Value = datereg.Text;

int i = cmd.ExecuteNonQuery();

Answer 1

You should have your column declared as a DATE type in MySQL

Then use .Date on the datetimepicker's .Value

cmd.Parameters.Add("@regdate", MySqlDbType.Date).Value = datereg.Value.Date;

You should note that this does not "remove" a time from a date; it sets it to midnight. There is no way to remove a time from a date- a moment in time is a moment in time, just like 1 and 1.0 are the same thing. 1 might be formatted without any decimal digits but it's illogical to say that 1 and 1.0 are different

Once you make all your dates have the same time (midnight, 00:00:00 which is effectively the.0 in 1.0) the ability to compare datetimes in date alone makes sense.

Answer 2

try to use simple <input type="date"> , because it has default format to YYYY-MM-DD