C# datareadeer return null
// ****** Use MySqlDataReader instead of SqlReader if you are using MySQL *******
//You need to check for IsDBNull:
//That's your only reliable way to detect and handle this situation.
//I wrapped those things into extension methods and tend to return a default value
//if the column is indeed null:
public static string SafeGetString(this SqlDataReader reader, int colIndex)
{
if(!reader.IsDBNull(colIndex))
return reader.GetString(colIndex);
return string.Empty;
}
//Now you can call it like this:
employee.FirstName = SqlReader.SafeGetString(indexFirstName);
// and you'll never have to worry about an exception or a null value again.