将数字转换为数据类型数字时出错

Question

I have little error when converting numeric to data type numeric. i need to take hours(decimal) between 2 date (dateTime).

but I see error

System.Data.SqlClient.SqlException: Arithmetic overflow error converting numeric to data type numeric.

var hours = (dateTime1 - dateTime2).TotalHours;
res = Math.Round(Convert.ToDecimal(hours),2);

how can i clean take hours?

Answer 1

1. Don't convert TotalHours to decimal, it is a double , just leave that as is
2. Ensure that the column in the SQL table you are writing this to is of type float