/// <summary>
/// Asynchronously retrieves 8 or more subsequent values from this <see cref="AsyncDataRow"/> and transforms them into a <see cref="ValueTuple{T1,T2,T3,T4,T5,T6,T7,TRest}"/>.
/// </summary>
/// <typeparam name="T1">The type of the first value to get from this <see cref="AsyncDataRow"/>.</typeparam>
/// <typeparam name="T2">The type of the second value to get from this <see cref="AsyncDataRow"/>.</typeparam>
/// <typeparam name="T3">The type of the third value to get from this <see cref="AsyncDataRow"/>.</typeparam>
/// <typeparam name="T4">The type of the fourth value to get from this <see cref="AsyncDataRow"/>.</typeparam>
/// <typeparam name="T5">The type of the fifth value to get from this <see cref="AsyncDataRow"/>.</typeparam>
/// <typeparam name="T6">The type of the sixth value to get from this <see cref="AsyncDataRow"/>.</typeparam>
/// <typeparam name="T7">The type of the seventh value to get from this <see cref="AsyncDataRow"/>.</typeparam>
/// <typeparam name="TRest">The type of the rest of the values to get from this <see cref="AsyncDataRow"/>.</typeparam>
/// <param name="row">This <see cref="AsyncDataRow"/>.</param>
/// <param name="startIndex">The index at which to get the first value. The rest of the values are retrieved from subsequent indices.</param>
/// <returns>Potentially asynchronously returns a <see cref="ValueTuple{T1,T2,T3,T4,T5,T6,T7,TRest}"/> containing the retrieved value.</returns>
/// <exception cref="NullReferenceException">If this <see cref="AsyncDataRow"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentException">If any of the value indices is out of range for this <see cref="AsyncDataRow"/>.</exception>
public static async ValueTask <ValueTuple <T1, T2, T3, T4, T5, T6, T7, TRest> > TransformToTuple <T1, T2, T3, T4, T5, T6, T7, TRest>(this AsyncDataRow row, Int32 startIndex = 0)
where TRest : struct
{
return(new ValueTuple <T1, T2, T3, T4, T5, T6, T7, TRest>(
await row.GetValueAsync <T1>(startIndex),
await row.GetValueAsync <T2>(startIndex + 1),
await row.GetValueAsync <T3>(startIndex + 2),
await row.GetValueAsync <T4>(startIndex + 3),
await row.GetValueAsync <T5>(startIndex + 4),
await row.GetValueAsync <T6>(startIndex + 5),
await row.GetValueAsync <T7>(startIndex + 6),
await row.GetValueAsync <TRest>(startIndex + 7)
));
}
/// <summary>
/// Asynchronously retrieves 1 value from this <see cref="AsyncDataRow"/> and transforms it into a <see cref="ValueTuple{T1}"/>.
/// </summary>
/// <typeparam name="T1">The type of the value to get from this <see cref="AsyncDataRow"/>.</typeparam>
/// <param name="row">This <see cref="AsyncDataRow"/>.</param>
/// <param name="index">The index at which to get the value.</param>
/// <returns>Potentially asynchronously returns a <see cref="ValueTuple{T1}"/> containing the retrieved value.</returns>
/// <exception cref="NullReferenceException">If this <see cref="AsyncDataRow"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentException">If the <paramref name="index"/> is out of range for this <see cref="AsyncDataRow"/>.</exception>
public static async ValueTask <ValueTuple <T1> > TransformToTuple <T1>(this AsyncDataRow row, Int32 index = 0)
{
return(new ValueTuple <T1>(await row.GetValueAsync <T1>(index)));
}
/// <summary>
/// Helper method to asynchronously get value as is from this <see cref="AsyncDataRow"/>, and the value as <see cref="Object"/>.
/// </summary>
/// <param name="row">This <see cref="AsyncDataRow"/>.</param>
/// <param name="columnLabel">The label of column holding the value.</param>
/// <returns>A task which will on completion contain casted value.</returns>
/// <exception cref="NullReferenceException">If this <see cref="AsyncDataRow"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentException">If column labeled as <paramref name="columnLabel"/> is not present in this <see cref="AsyncDataRow"/>.</exception>
public static async ValueTask <Object> GetValueAsObjectAsync(this AsyncDataRow row, String columnLabel)
{
return(await row.GetValueAsync(row.Metadata.GetIndexOrThrow(columnLabel), typeof(Object)));
}
/// <summary>
/// Helper method to asynchronously get value from this <see cref="AsyncDataRow"/>, and cast the value to given type., which is known at compile time.
/// </summary>
/// <typeparam name="T">The type to cast value to.</typeparam>
/// <param name="row">This <see cref="AsyncDataRow"/>.</param>
/// <param name="columnLabel">The label of column holding the value.</param>
/// <returns>A task which will on completion contain casted value.</returns>
/// <exception cref="NullReferenceException">If this <see cref="AsyncDataRow"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentException">If column labeled as <paramref name="columnLabel"/> is not present in this <see cref="AsyncDataRow"/>.</exception>
public static async ValueTask <T> GetValueAsync <T>(this AsyncDataRow row, String columnLabel)
{
return((T)(await row.GetValueAsync(row.Metadata.GetIndexOrThrow(columnLabel), typeof(T))));
}
/// <summary>
/// Helper method to asynchronously get value as is from this <see cref="AsyncDataRow"/>, and the value as <see cref="Object"/>.
/// </summary>
/// <param name="row">This <see cref="AsyncDataRow"/>.</param>
/// <param name="index">The index of column holding the value.</param>
/// <returns>A task which will on completion contain casted value.</returns>
/// <exception cref="NullReferenceException">If this <see cref="AsyncDataRow"/> is <c>null</c>.</exception>
public static async ValueTask <Object> GetValueAsObjectAsync(this AsyncDataRow row, Int32 index)
{
return(await row.GetValueAsync(index, typeof(Object)));
}
/// <summary>
/// Helper method to asynchronously get value from this <see cref="AsyncDataRow"/>, and cast the value to given type., which is known at compile time.
/// </summary>
/// <typeparam name="T">The type to cast value to.</typeparam>
/// <param name="row">This <see cref="AsyncDataRow"/>.</param>
/// <param name="index">The index of column holding the value.</param>
/// <returns>A task which will on completion contain casted value.</returns>
/// <exception cref="NullReferenceException">If this <see cref="AsyncDataRow"/> is <c>null</c>.</exception>
public static async ValueTask <T> GetValueAsync <T>(this AsyncDataRow row, Int32 index)
{
return((T)(await row.GetValueAsync(index, typeof(T))));
}