/// <summary>
/// Export all the database data associated with the selected view to the .csv file indicated in the file path so that spreadsheet applications (like Excel) can display it.
/// </summary>
public static async Task <bool> ExportToCsv(FileDatabase database, string filePath, CSVDateTimeOptionsEnum csvDateTimeOptions, bool csvInsertSpaceBeforeDates)
{
// Set up a progress handler that will update the progress bar
Progress <ProgressBarArguments> progressHandler = new Progress <ProgressBarArguments>(value =>
{
// Update the progress bar
CsvReaderWriter.UpdateProgressBar(GlobalReferences.BusyCancelIndicator, value.PercentDone, value.Message, value.IsCancelEnabled, value.IsIndeterminate);
});
IProgress <ProgressBarArguments> progress = progressHandler;
return(await Task.Run(() =>
{
//The separator, while normally a comma, can be different in some countries
// We special case the separator as a ';' for countries that us a comma for a decimal point, e.g., Germany
String separator = String.Equals(",", System.Globalization.CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator)
? ";"
: ",";
try
{
progress.Report(new ProgressBarArguments(0, "Writing the CSV file. Please wait", false, true));
using (StreamWriter fileWriter = new StreamWriter(filePath, false))
{
// Write the header as defined by the data labels in the template file
// If the data label is an empty string, we use the label instead.
// The append sequence results in a trailing comma which is retained when writing the line.
StringBuilder header = new StringBuilder();
List <string> dataLabels = database.GetDataLabelsExceptIDInSpreadsheetOrder();
foreach (string dataLabel in dataLabels)
{
if (dataLabel == Constant.DatabaseColumn.UtcOffset)
{
// Always skip UTC Offset, as the user has the option of including that in the DateTime column instead
continue;
}
// Skip the DateTime and Utc offset column headers
//if (excludeDateTimeAndUTCOffset == true && (dataLabel == Constant.DatabaseColumn.DateTime || dataLabel == Constant.DatabaseColumn.UtcOffset))
if ((dataLabel == Constant.DatabaseColumn.Date || dataLabel == Constant.DatabaseColumn.Time) && csvDateTimeOptions != CSVDateTimeOptionsEnum.DateAndTimeColumns)
{
// Skip the Date column and Time column if the CSVDateTimeOptions are set to a parameter other than the two Date / Time columns
continue;
}
if (dataLabel == Constant.DatabaseColumn.DateTime && csvDateTimeOptions == CSVDateTimeOptionsEnum.DateAndTimeColumns)
{
// Skip the DateTime column if the CSVDateTimeOptions is set to show the two Date / Time columns instead
continue;
}
header.Append(AddColumnValue(dataLabel, separator));
}
fileWriter.WriteLine(header.ToString());
// For each row in the data table, write out the columns in the same order as the
// data labels in the template file
int countAllCurrentlySelectedFiles = database.CountAllCurrentlySelectedFiles;
for (int row = 0; row < countAllCurrentlySelectedFiles; row++)
{
StringBuilder csvRow = new StringBuilder();
ImageRow image = database.FileTable[row];
foreach (string dataLabel in dataLabels)
{
if (dataLabel == Constant.DatabaseColumn.UtcOffset)
{
// Always skip UTC Offset, as the user has the option of including that in the DateTime column instead
continue;
}
if ((dataLabel == Constant.DatabaseColumn.Date || dataLabel == Constant.DatabaseColumn.Time) && csvDateTimeOptions != CSVDateTimeOptionsEnum.DateAndTimeColumns)
{
// Skip the Date column and Time column if the CSVDateTimeOptions are set to a parameter other than the two Date / Time columns
continue;
}
if (dataLabel == Constant.DatabaseColumn.DateTime)
{
if (csvDateTimeOptions == CSVDateTimeOptionsEnum.DateAndTimeColumns)
{
// Skip the DateTime column if the CSVDateTimeOptions is set to show the two Date / Time columns instead
continue;
}
else
{
string prefix = csvInsertSpaceBeforeDates ? " " : String.Empty;
if (csvDateTimeOptions == CSVDateTimeOptionsEnum.DateTimeColumnWithTSeparator)
{
csvRow.Append(prefix + AddColumnValue(image.GetValueCSVDateTimeWithTSeparatorString(), separator));
}
else if (csvDateTimeOptions == CSVDateTimeOptionsEnum.DateTimeWithoutTSeparatorColumn)
{
csvRow.Append(prefix + AddColumnValue(image.GetValueCSVDateTimeWithoutTSeparatorString(), separator));
}
else
{
//Defunct, no longer used, should not get here
System.Diagnostics.Debug.Print("In CSVWriter: Should not be trying to write a UTC Offset formatted date!");
//if (csvDateTimeOptions == CSVDateTimeOptionsEnum.DateTimeUTCWithOffset)
//{
// csvRow.Append(prefix + AddColumnValue(image.GetValueCSVDateTimeUTCWithOffsetString()));
//}
}
}
}
else if (dataLabel == Constant.DatabaseColumn.Date || dataLabel == Constant.DatabaseColumn.Time)
{
string prefix = csvInsertSpaceBeforeDates ? " " : String.Empty;
csvRow.Append(prefix + AddColumnValue(image.GetValueDatabaseString(dataLabel), separator));
}
else
{
csvRow.Append(AddColumnValue(image.GetValueDatabaseString(dataLabel), separator));
}
}
fileWriter.WriteLine(csvRow.ToString());
if (row % 5000 == 0)
{
progress.Report(new ProgressBarArguments(Convert.ToInt32(((double)row) / countAllCurrentlySelectedFiles * 100.0), String.Format("Writing {0}/{1} file entries to CSV file. Please wait...", row, countAllCurrentlySelectedFiles), false, false));
}
}
}
return true;
}
catch
{
return false;
}
}).ConfigureAwait(true));
}
