public void GetValueOrDefault_NonDbNullInt()
{
object target = 123;
int actual = DatabaseValueParser.GetValueOrDefault <int>(target);
Assert.Equal(123, actual);
}
public void GetValueOrDefault_DbNullInt()
{
object target = DBNull.Value;
int actual = DatabaseValueParser.GetValueOrDefault <int>(target);
Assert.Equal(0, actual);
}
/// <summary>
/// Gets the value of the given field from the data reader or the
/// default for the object type.
/// </summary>
/// <typeparam name="T">Type of object.</typeparam>
/// <param name="dataRecord">Current IDataRecord object from extension method.</param>
/// <param name="index">Index of field within IDataRecord.</param>
/// <param name="defaultValue">Value to use if null field value.</param>
/// <returns>The given field's value or the given default.</returns>
public static T GetValueOrDefault <T>(this IDataRecord dataRecord, int index, T defaultValue)
{
if (dataRecord == null)
{
throw new ArgumentNullException(nameof(dataRecord));
}
object value = dataRecord[index];
return(DatabaseValueParser.GetValueOrDefault(value, defaultValue));
}
/// <summary>
/// Gets the value of the given field from the data reader or the
/// default for the object type.
/// </summary>
/// <typeparam name="T">Type of object.</typeparam>
/// <param name="dataRecord">Current IDataRecord object from extension method.</param>
/// <param name="name">Name of field within IDataRecord.</param>
/// <returns>The given field's value or the default for the object type.</returns>
public static T GetValueOrDefault <T>(this IDataRecord dataRecord, string name)
{
if (dataRecord == null)
{
throw new ArgumentNullException(nameof(dataRecord));
}
object value = dataRecord[name];
return(DatabaseValueParser.GetValueOrDefault <T>(value));
}