public SpotfireDataFileMetadataBuilder(SpotfireFileFormat sff)
{
if (sff == SpotfireFileFormat.Text)
{
stdfMdb = new StdfTableMetadataBuilder();
}
else
{
sbdfMdb = new SbdfTableMetadataBuilder();
}
}
/// <summary>
/// This example is a simple command line tool that writes a simple SBDF file
/// with random data.
/// </summary>
public static void WriteSbdfFileExample(string[] args)
{
// The command line application requires one argument which is supposed to be
// the name of the SBDF file to generate.
if (args.Length != 1)
{
System.Console.WriteLine("Syntax: WriterSample outputfile.sbdf");
return;
}
var outputFile = args[0];
// First we just open the file as usual and then we need to wrap the stream
// in a binary writer.
using (var stream = File.OpenWrite(outputFile))
using (var writer = new BinaryWriter(stream))
{
// When writing an SBDF file you first need to write the file header.
SbdfFileHeader.WriteCurrentVersion(writer);
// The second part of the SBDF file is the metadata, in order to create
// the table metadata we need to use the builder class.
var tableMetadataBuilder = new SbdfTableMetadataBuilder();
// The table can have metadata properties defined. Here we add a custom
// property indicating the producer of the file. This will be imported as
// a table property in Spotfire.
tableMetadataBuilder.AddProperty("GeneratedBy", "WriterSample.exe");
// All columns in the table need to be defined and added to the metadata builder,
// the required information is the name of the column and the data type.
var col1 = new SbdfColumnMetadata("Category", SbdfValueType.String);
tableMetadataBuilder.AddColumn(col1);
// Similar to tables, columns can also have metadata properties defined. Here
// we add another custom property. This will be imported as a column property
// in Spotfire.
col1.AddProperty("SampleProperty", "col1");
var col2 = new SbdfColumnMetadata("Value", SbdfValueType.Double);
tableMetadataBuilder.AddColumn(col2);
col2.AddProperty("SampleProperty", "col2");
var col3 = new SbdfColumnMetadata("TimeStamp", SbdfValueType.DateTime);
tableMetadataBuilder.AddColumn(col3);
col3.AddProperty("SampleProperty", "col3");
// We need to call the build function in order to get an object that we can
// write to the file.
var tableMetadata = tableMetadataBuilder.Build();
tableMetadata.Write(writer);
const int rowCount = 10000;
var random = new Random((int)DateTime.Now.Ticks);
// Now that we have written all the metadata we can start writing the actual data.
// Here we use a SbdfTableWriter to write the data, remember to dispose the table writer
// otherwise you will not generate a correct SBDF file.
using (var tableWriter = new SbdfTableWriter(writer, tableMetadata))
{
for (int i = 0; i < rowCount; ++i)
{
// You need to perform one AddValue call for each column, for each row in the
// same order as you added the columns to the table metadata object.
// In this example we just generate some random values of the appropriate types.
// Here we write the first string column.
var col1Values = new[] { "A", "B", "C", "D", "E" };
tableWriter.AddValue(col1Values[random.Next(0, 5)]);
// Next we write the second double column.
var doubleValue = random.NextDouble();
if (doubleValue < 0.5)
{
// Note that if you want to write a null value you shouldn't send null to
// AddValue, instead you should use the InvalidValue property of the columns
// SbdfValueType.
tableWriter.AddValue(SbdfValueType.Double.InvalidValue);
}
else
{
tableWriter.AddValue(random.NextDouble());
}
// And finally the third date time column.
tableWriter.AddValue(DateTime.Now);
}
}
}
System.Console.WriteLine("Wrote file: " + outputFile);
}