public IWritable Write(
[InputPin(Name = "M", Description = "source Matrix", PropertyMode = PropertyMode.Allow)]
M m,
[InputPin(Name = "Delimiter", Description = "Character which should be used as delimiter between two data fields", PropertyMode = PropertyMode.Default, Editor = WellKnownEditors.SingleLineText)]
string delimiter = ",",
[InputPin(Name = "Headline", Description = "Write a Headline", PropertyMode = PropertyMode.Default, Editor = WellKnownEditors.SingleLineText)]
string[] headline = null
)
{
return(Writable.Create(async(fileStream, cancel) =>
{
using (var writer = new StreamWriter(fileStream))
{
var sb = new StringBuilder();
if (headline != null)
{
for (int i = 0; i < headline.Length; ++i)
{
if (i > 0)
{
sb.Append(delimiter);
}
var s = headline[i];
s = s.Replace("\"", "\"\""); // duplicate quotation marks " -> ""
sb.Append('"'); // start of string
sb.Append(s);
sb.Append('"'); // end of string
}
await writer.WriteLineAsync(sb.ToString());
sb.Clear();
}
var a = m.UnderlyingArray;
for (int i = 0; i < a.Dimension[0]; i++)
{
if ((i % 100) == 0)
{
cancel.ThrowIfCancellationRequested();
}
for (int j = 0; j < a.Dimension[1]; j++)
{
if (j > 0)
{
sb.Append(delimiter);
}
sb.Append(Convert.ToString(a.GetValue(i, j), CultureInfo.InvariantCulture));
}
await writer.WriteLineAsync(sb.ToString()); // we always add a line break - even when writing the last line of the CSV file
sb.Clear();
}
await writer.FlushAsync();
}
}));
}
public IWritable CreateWritable(
[InputPin(PropertyMode = PropertyMode.Allow)] string data,
[InputPin(PropertyMode = PropertyMode.Default)] Encoding encoding = null
)
{
return(Writable.Create(async(destination, cancel) =>
{
using (var sw = new StreamWriter(destination, encoding ?? Encoding.UTF8, 512, true))
{
await sw.WriteAsync(data).ConfigureAwait(false);
}
}));
}
public static IWritable EncodeBitmap(
[InputPin(PropertyMode = PropertyMode.Never)] SKBitmap bitmap,
[InputPin(PropertyMode = PropertyMode.Default)] SKEncodedImageFormat format = SKEncodedImageFormat.Png,
[InputPin(PropertyMode = PropertyMode.Default)] int quality = 95
)
{
return(Writable.Create(stream =>
{
using (var skStream = new SKManagedWStream(stream))
{
SKPixmap.Encode(skStream, bitmap, format, quality);
}
}));
}