public void GetValuesTest()
{
var s = new StringBuilder();
s.AppendLine("Boolean,Byte,Bytes,Char,Chars,DateTime,Decimal,Double,Float,Guid,Short,Int,Long,Null");
s.AppendLine("true,1,0x0102,a,ab,1/1/2019,1.23,4.56,7.89,eca0c8c6-9a2a-4e6c-8599-3561abda13f1,1,2,3,null");
using (var reader = new StringReader(s.ToString()))
using (var csv = new CsvReader(reader, CultureInfo.InvariantCulture))
{
csv.Configuration.Delimiter = ",";
csv.Configuration.TypeConverterOptionsCache.GetOptions <string>().NullValues.Add("null");
var dataReader = new CsvDataReader(csv);
dataReader.Read();
Assert.AreEqual(true, dataReader.GetBoolean(0));
Assert.AreEqual(1, dataReader.GetByte(1));
byte[] byteBuffer = new byte[2];
dataReader.GetBytes(2, 0, byteBuffer, 0, byteBuffer.Length);
Assert.AreEqual(0x1, byteBuffer[0]);
Assert.AreEqual(0x2, byteBuffer[1]);
Assert.AreEqual('a', dataReader.GetChar(3));
char[] charBuffer = new char[2];
dataReader.GetChars(4, 0, charBuffer, 0, charBuffer.Length);
Assert.AreEqual('a', charBuffer[0]);
Assert.AreEqual('b', charBuffer[1]);
Assert.IsNull(dataReader.GetData(0));
Assert.AreEqual(DateTime.Parse("1/1/2019"), dataReader.GetDateTime(5));
Assert.AreEqual(typeof(string).Name, dataReader.GetDataTypeName(0));
Assert.AreEqual(1.23m, dataReader.GetDecimal(6));
Assert.AreEqual(4.56d, dataReader.GetDouble(7));
Assert.AreEqual(typeof(string), dataReader.GetFieldType(0));
Assert.AreEqual(7.89f, dataReader.GetFloat(8));
Assert.AreEqual(Guid.Parse("eca0c8c6-9a2a-4e6c-8599-3561abda13f1"), dataReader.GetGuid(9));
Assert.AreEqual(1, dataReader.GetInt16(10));
Assert.AreEqual(2, dataReader.GetInt32(11));
Assert.AreEqual(3, dataReader.GetInt64(12));
Assert.AreEqual("Boolean", dataReader.GetName(0));
Assert.AreEqual(0, dataReader.GetOrdinal("Boolean"));
Assert.AreEqual("true", dataReader.GetString(0));
Assert.AreEqual("true", dataReader.GetValue(0));
var objectBuffer = new object[14];
dataReader.GetValues(objectBuffer);
Assert.AreEqual("true", objectBuffer[0]);
Assert.AreEqual(DBNull.Value, objectBuffer[13]);
Assert.IsTrue(dataReader.IsDBNull(13));
}
}
private string AppendWeatherData(CsvDataReader csv, WeatherHist result)
{
var rowData = new string[csv.FieldCount + 4];
csv.GetValues(rowData);
if (result != null)
{
var invariantCulture = CultureInfo.InvariantCulture;
rowData[rowData.Length - 1] = string.Format(invariantCulture, "{0:0.##}", result.Dd);
rowData[rowData.Length - 2] = string.Format(invariantCulture, "{0:0.##}", result.Ff);
rowData[rowData.Length - 3] = string.Format(invariantCulture, "{0:0.##}", result.Thq);
rowData[rowData.Length - 4] = string.Format(invariantCulture, "{0:0.##}", result.Hs);
}
return(string.Join(Settings.Delimiter, rowData));
}
public void DbNullTest()
{
var s = new StringBuilder();
s.AppendLine(",null");
using (var reader = new StringReader(s.ToString()))
using (var csv = new CsvReader(reader, CultureInfo.InvariantCulture))
{
csv.Configuration.HasHeaderRecord = false;
csv.Configuration.TypeConverterOptionsCache.GetOptions <string>().NullValues.Add("null");
var dataReader = new CsvDataReader(csv);
Assert.AreEqual(string.Empty, dataReader.GetValue(0));
Assert.AreEqual(DBNull.Value, dataReader.GetValue(1));
var values = new object[2];
dataReader.GetValues(values);
Assert.AreEqual(string.Empty, values[0]);
Assert.AreEqual(DBNull.Value, values[1]);
}
}
public StreamLinesSample()
{
InitializeComponent();
// We will set the tube path position color based on the Density
string colorColumnName = "Density"; // "AngularVelocity"
bool invertColorValue = false; // This needs to be set to true when using AngularVelocity
// First create a gradient legend and texture
var gradientStopCollection = new GradientStopCollection();
gradientStopCollection.Add(new GradientStop(Colors.Red, 1));
gradientStopCollection.Add(new GradientStop(Colors.Yellow, 0.75));
gradientStopCollection.Add(new GradientStop(Colors.Lime, 0.5));
gradientStopCollection.Add(new GradientStop(Colors.Aqua, 0.25));
gradientStopCollection.Add(new GradientStop(Colors.Blue, 0));
var linearGradientBrush = new LinearGradientBrush(gradientStopCollection,
new System.Windows.Point(0, 1), // startPoint (offset == 0) - note that y axis is down (so 1 is bottom)
new System.Windows.Point(0, 0)); // endPoint (offset == 1)
// Create Legend control
var gradientColorLegend = new GradientColorLegend()
{
Width = 70,
Height = 200,
Margin = new Thickness(5, 5, 5, 5)
};
gradientColorLegend.GradientBrush = linearGradientBrush;
var gradientTexture = gradientColorLegend.RenderToTexture(size: 256, isHorizontal: true);
var imageBrush = new ImageBrush(gradientTexture);
// IMPORTANT:
// When texture coordinates have one components (for example y) always set to 0,
// we need to change the ViewportUnits from the default RelativeToBoundingBox to Absolute.
imageBrush.ViewportUnits = BrushMappingMode.Absolute;
var gradientMaterial = new DiffuseMaterial(imageBrush);
// Now load sample data
// Sample data was created by using ParaView application and exporting the streamlines into csv file.
string sampleDataFileName = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Resources\\Streamlines.csv");
// Create csv file reader that can read data from a csv file
var csvDataReader = new CsvDataReader();
csvDataReader.ReadFile(sampleDataFileName);
float minValue, maxValue;
csvDataReader.GetValuesRange(colorColumnName, out minValue, out maxValue);
float dataRange = maxValue - minValue;
var streamlineIndexes = csvDataReader.IndividualObjectIndexes;
// Create the streamlines
var allStreamlineBounds = new Rect3D();
for (var i = 0; i < csvDataReader.IndividualObjectIndexes.Length - 1; i++)
{
Rect3D bounds;
int startIndex = streamlineIndexes[i];
int endIndex = streamlineIndexes[i + 1] - 1;
int dataCount = endIndex - startIndex;
if (dataCount < 2) // Skip streamlines without any positions or with less then 2 positions
{
continue;
}
var positions = csvDataReader.GetPositions(startIndex, dataCount, out bounds);
allStreamlineBounds.Union(bounds);
var pathPositions = new Point3DCollection(positions);
float[] dataValues = csvDataReader.GetValues(colorColumnName, startIndex, dataCount);
// Generate texture coordinates for each path position
// Because our texture is one dimensional gradient image (size 256 x 1)
// we set the x coordinate in range from 0 to 1 (0 = first gradient color; 1 = last gradient color).
//
// Note:
// If we would only set x texture coordinate and preserve y at 0,
// WPF would not render the texture because the y size would be 0
// and because by default the ViewportUnits is set to RelativeToBoundingBox,
// WPF "thinks" the texture is empty.
// Therefore we need to set the imageBrush.ViewportUnits to Absolute.
var positionsCount = pathPositions.Count;
var textureCoordinates = new PointCollection(positionsCount);
for (int j = 0; j < dataCount; j++)
{
float relativeDataValue = (dataValues[j] - minValue) / dataRange;
if (invertColorValue)
{
relativeDataValue = 1.0f - relativeDataValue;
}
textureCoordinates.Add(new Point(relativeDataValue, 0));
}
var tubePathMesh3D = new Ab3d.Meshes.TubePathMesh3D(
pathPositions: pathPositions,
pathPositionTextureCoordinates: textureCoordinates,
radius: 0.03,
isTubeClosed: true,
isPathClosed: false,
segments: 8);
var geometryModel3D = new GeometryModel3D(tubePathMesh3D.Geometry, gradientMaterial);
//var geometryModel3D = new GeometryModel3D(tubePathMesh3D.Geometry, new DiffuseMaterial(Brushes.Red));
geometryModel3D.BackMaterial = new DiffuseMaterial(Brushes.DimGray);
var modelVisual3D = new ModelVisual3D()
{
Content = geometryModel3D
};
MainViewport.Children.Add(modelVisual3D);
}
Camera1.TargetPosition = allStreamlineBounds.GetCenterPosition();
Camera1.Distance = allStreamlineBounds.GetDiagonalLength();
// Add legend control:
int legendValuesCount = 5;
for (int i = 0; i < legendValuesCount; i++)
{
float t = (float)i / (float)(legendValuesCount - 1);
float oneValue = minValue + t * (maxValue - minValue);
string valueLegendText = string.Format(System.Globalization.CultureInfo.InvariantCulture, "{0:0.00}", oneValue);
gradientColorLegend.LegendLabels.Add(new GradientColorLegend.LegendLabel(t, valueLegendText));
}
var legendTitleTextBlock = new TextBlock()
{
Text = colorColumnName,
FontSize = 14,
FontWeight = FontWeights.Bold,
Foreground = Brushes.Black,
HorizontalAlignment = HorizontalAlignment.Center
};
var stackPanel = new StackPanel()
{
Orientation = Orientation.Vertical,
VerticalAlignment = VerticalAlignment.Bottom,
HorizontalAlignment = HorizontalAlignment.Right,
Margin = new Thickness(0, 0, 5, 5)
};
stackPanel.Children.Add(legendTitleTextBlock);
stackPanel.Children.Add(gradientColorLegend);
RootGrid.Children.Add(stackPanel);
}
// Read in rows from a .csv file in a stream
static async Task <long> importCSV(string src, IMongoCollection <BsonDocument> collection, int import_chunk_size)
{
long count = 0;
var documents = new List <BsonDocument>();
using (var fin = new StreamReader(src))
using (var csv = new CsvReader(fin))
using (var cr = new CsvDataReader(csv))
{
// Create utility arrays that can hold all elements of the header row and any given data row
int amt_cols = cr.FieldCount;
Debug.Assert(amt_cols > 0);
var headers = new object[amt_cols];
var records = new object[amt_cols];
logger.Debug($"Parsed {amt_cols} columns in file {src}");
var ret = cr.GetValues(headers);
Debug.Assert(ret > 0);
logger.Debug($"Returned {ret} : " + string.Join(',', headers));
// Keep reading until EOF
while (cr.Read())
{
// Read record line
ret = cr.GetValues(records);
Debug.Assert(ret > 0);
// Create a dictionary mapping each header element to its respective record element
// Weed out any empty string elements
var zipped = headers.Zip(records, (h, r) => new { h, r })
.Where(item => item.r.ToString() != "")
.ToDictionary(item => item.h, item => {
int i;
double d;
string r = item.r.ToString();
if (r.StartsWith('$'))
{
r = r.Substring(1);
}
if (int.TryParse(r, out i))
{
return(i);
}
if (double.TryParse(r, out d))
{
return(d);
}
return(item.r);
});
// Add dictionary to import buffer
documents.Add(zipped.ToBsonDocument());
++count;
// Add documents in batches to the db
if (count % import_chunk_size == 0)
{
await collection.InsertManyAsync(documents);
logger.Debug($"Uploded {import_chunk_size} records to {collection.CollectionNamespace.CollectionName}...");
documents.Clear();
}
}
// Add any remaining docs to the db
if (documents.Count != 0)
{
await collection.InsertManyAsync(documents);
}
}
return(count);
}
protected override void BeginProcessing()
{
var csvHelperConfig = Configuration ?? new Configuration();
csvHelperConfig.IncludePrivateMembers = true;
csvHelperConfig.MemberTypes = MemberTypes.Fields | MemberTypes.Properties;
csvHelperConfig.AllowComments = AllowComments;
csvHelperConfig.BufferSize = BufferSize;
csvHelperConfig.Comment = CommentChar;
csvHelperConfig.HasHeaderRecord = !NoHeaderRecord;
csvHelperConfig.IgnoreBlankLines = !KeepBlankLines;
csvHelperConfig.IgnoreQuotes = IgnoreQuote;
csvHelperConfig.TrimOptions = TrimOption;
var p = MyInvocation.BoundParameters;
if (p.ContainsKey("Delimiter"))
{
csvHelperConfig.Delimiter = Delimiter;
}
if (p.ContainsKey("EscapeChar"))
{
csvHelperConfig.Escape = EscapeChar;
}
if (p.ContainsKey("QuoteChar"))
{
csvHelperConfig.Quote = QuoteChar;
}
_config = new Config()
{
CsvHelperConfiguration = csvHelperConfig,
InitialCapacity = InitialCapacity,
ColumnNames = ColumnNames,
ColumnNameMap = ColumnNameMap,
ColumnTypes = ColumnTypes,
Strict = Strict,
Culture = Culture
};
if (AsDataTable)
{
// The current version does not support combination of -AsDataTable and input stream.
if (string.IsNullOrEmpty(Path))
{
WriteError(new ErrorRecord(new ArgumentException("-Path is required when -AsDataTable is set"), "", ErrorCategory.InvalidArgument, null));
return;
}
using (var reader = new StreamReader(Path, Encoding))
using (var csvReader = new CsvReader(reader, _config.CsvHelperConfiguration))
using (var csvDataReader = new CsvDataReader(csvReader))
{
var dt = new DataTable();
if (ColumnTypes != null)
{
foreach (DictionaryEntry entry in ColumnTypes)
{
dt.Columns.Add((string)entry.Key, (Type)entry.Value);
}
}
else
{
for (int i = 0; i < csvDataReader.FieldCount; i++)
{
dt.Columns.Add(csvDataReader.GetName(i), csvDataReader.GetFieldType(i));
}
}
if (ReadCount > 0)
{
int rowCount = 0;
while (csvDataReader.Read())
{
if (rowCount % ReadCount == 0)
{
WriteVerbose($"Starting batch of {ReadCount} ({rowCount} records processed)");
}
string[] row = new String[csvDataReader.FieldCount];
csvDataReader.GetValues(row);
dt.LoadDataRow(row, true);
rowCount++;
if (rowCount % ReadCount == 0)
{
WriteObject(dt.Copy());
dt.Clear();
}
}
// Write out remaining rows, if any.
if (dt.Rows.Count > 0)
{
WriteObject(dt);
}
}
else
{
dt.Load(csvDataReader);
WriteObject(dt);
}
}
return;
}
if (!string.IsNullOrEmpty(Path))
{
using (var reader = new StreamReader(Path, Encoding))
using (var loader = new CsvLoader(reader, _config))
{
LoadFile(loader);
}
return;
}
_output = new BlockingCollection <object>();
_completeEvent = new ManualResetEvent(false);
_loader = new CsvLoader(null, _config);
var thread = new Thread(() => {
try
{
LoadFile(_loader);
}
catch (Exception e)
{
_exception = e;
}
finally
{
_completeEvent.Set();
}
});
thread.Name = "Import-Csv2 loader thread";
thread.Start();
}