DataReaderDecoratorExtensions Class

Definition

Namespace

Cuemon.Data

Assemblies

Cuemon.Data.dll

Source

src/Cuemon.Data/Extensions/DataReaderDecoratorExtensions.cs

Extension methods for the IDataReader interface hidden behind the IDecorator<T> interface.

public static class DataReaderDecoratorExtensions

Inheritance

object

DataReaderDecoratorExtensions

Examples

DataReaderDecoratorExtensions provides extension methods on Decorator.Enclose for converting IDataReader content into encoded strings or streams, both synchronously and asynchronously. This example creates a single-column DSV data source backed by DsvDataReader with three rows of data, then wraps it and calls ToEncodedString, ToEncodedStringAsync, and ToStream. Key steps include repositioning the underlying stream between conversions and using DsvDataReader as the input source. Console output shows the string representation of the data and the stream length.

using System;
using System.Data;
using System.IO;
using System.Text;
using System.Threading.Tasks;
using Cuemon;
using Cuemon.Data;

namespace MyApp.Examples
{
    public class DataReaderDecoratorExtensionsExample
    {
        public static async Task DemonstrateAsync()
        {
            // Create a single-column DSV data source (must have exactly one field)
            var csv = "Value\r\n1001\r\n1002\r\n1003\r\n";
            var bytes = Encoding.UTF8.GetBytes(csv);

            using (var stream = new MemoryStream(bytes))
            using (var reader = new DsvDataReader(new StreamReader(stream)))
            {
                // Convert the single-field IDataReader to an encoded string (sync)
                string result = Decorator.Enclose((IDataReader)reader).ToEncodedString();
                Console.WriteLine(result);

                // Convert the single-field IDataReader to an encoded string (async)
                stream.Position = 0;
                using (var asyncReader = new DsvDataReader(new StreamReader(new MemoryStream(bytes))))
                {
                    string asyncResult = await Decorator.Enclose((IDataReader)asyncReader).ToEncodedStringAsync();
                    Console.WriteLine(asyncResult);

                // Convert the data reader content to a stream
                stream.Position = 0;
                using (var readerAgain = new DsvDataReader(new StreamReader(new MemoryStream(bytes))))
                {
                    Stream dataStream = Decorator.Enclose((IDataReader)readerAgain).ToStream();
                    Console.WriteLine($"Stream length: {dataStream.Length}");

}}}}}
}

Methods

Name	Description
ToEncodedString(IDecorator<IDataReader>)	Converts the enclosed IDataReader of the decorator to an equivalent string representation.
ToEncodedStringAsync(IDecorator<IDataReader>)	Asynchronously converts the enclosed IDataReader of the decorator to an equivalent string representation.
ToStream(IDecorator<IDataReader>)	Converts the enclosed IDataReader of the decorator to an equivalent Stream representation.

See Also

IDecorator<T>

Decorator<T>