How to Correctly Convert a C# DateTime to SQL Server's yyyy-MM-dd HH:mm:ss Format?

Converting C# DateTime to SQL Server Date Format

In C#, converting the current date and time to the SQL Server date format (yyyy-MM-dd HH:mm:ss) is essential for storing timestamps in database queries. To address this need, several approaches are available.

Initial Approach and Drawbacks:

The initial attempt to format the date and time using ToString("yyyy-MM-dd HH:mm:ss") correctly sets the date component, but mistakenly generates "12:00:00" for the time portion.

Second Approach and Error:

Combining Date.ToString("yyyy-MM-dd") with TimeOfDay.ToString("HH:mm:ss") results in a compile error due to an invalid method call. TimeOfDay is a property, not a method.

Method Not Valid Error:

Attempts to parse and convert using Parse or tryParse also fail, as these methods are not applicable to TimeOfDay.

Correct Solution:

The correct approach is to use ToString() with the appropriate DateTime format specification. The code below achieves the desired format:

DateTime myDateTime = DateTime.Now;
string sqlFormattedDate = myDateTime.ToString("yyyy-MM-dd HH:mm:ss.fff");

This format includes the fractional seconds component (fff) to ensure accurate SQL Server compatibility.

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