Datetime2 to Datetime Conversion Error: Value Outside Acceptable Range

Database transactions sometimes throw errors when saving data to a "datetime" column. The error message points to a type mismatch between "datetime2" and "datetime." Even if you believe the column is "datetime," let's explore solutions.

Problem:

Can this error be fixed in the code, or is a database modification required?

Solution:

The solution involves examining both the code and the database:

Code-Based Solutions:

Validate DateTime Values: Verify that the myDate column in your DataTable is populated with a valid DateTime object. An uninitialized myDate will default to DateTime.MinValue, which falls outside the acceptable range for SQL Server's "datetime" type.
Explicit DateTime.MinValue Handling: Setting myDate explicitly to DateTime.MinValue might resolve the problem, depending on your application logic.

Database-Based Solutions:

The error indicates an attempted conversion from "datetime2" to "datetime." If the database column is indeed "datetime," the problem stems from Entity Framework's implicit conversion during the save.

To fix this:

Data Type Verification: Double-check that the database column's data type precisely matches the expected type in your data mapping. Ensure it's truly "datetime" and not "datetime2." If it's "datetime2," consider changing it to "datetime" (if appropriate for your data) or adjusting your code to handle "datetime2."

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