private static string ReadItemIntoRow(FileExportSpecification spec, object item)
{
var columnDelimiter = spec.ColumnDelimiter;
var sb = new StringBuilder();
var allPropertyValues = spec.GetPropertiesForType(item.GetType()).Values.ToList();
for (var i = 0; i < allPropertyValues.Count; i++)
{
var property = allPropertyValues[i];
string formattedValue = property.GetFormattedValue(item);
if (formattedValue.Contains(columnDelimiter))
{
formattedValue = spec.OnDelimiterFoundInValue(property.PropertyName, columnDelimiter, formattedValue);
}
sb.Append(formattedValue);
if (i < (allPropertyValues.Count - 1))
{
sb.Append(columnDelimiter);
}
}
return(sb.ToString());
}
public static void ExportToFile <T>(this FileExportSpecification spec, IEnumerable <T> items, string filePath)
{
using (TextWriter fileStream = new StreamWriter(filePath))
{
ExportToStream(spec, items, fileStream);
}
}
private void ConfigureRestOfProperties(Type objectType, FileExportSpecification fileExportSpecification)
{
// fallback formatter for anything that doesn't fit int he custom, or "global default" formatters.
var globalDefaultFormatter = new PropertyFormatter(context =>
{
if (context.ItemValue == null)
{
return(string.Empty);
}
return(context.ItemValue.ToString());
});
var properties = objectType.GetProperties();
for (int i = 0; i < properties.Length; i++)
{
var propertyInfo = properties[i];
var propertyName = propertyInfo.Name;
TypeConfiguration props = fileExportSpecification.GetTypeConfiguration(objectType);
if (!props.IsPropertyExcluded(propertyName))
{
if (props.IsPropertyDefined(propertyName))
{
props.Properties[propertyName].Order = i;
continue;
}
var propertyType = propertyInfo.PropertyType;
PropertyFormatter defaultPropertyFormatter = globalDefaultFormatter;
if (DefaultPropertyFormatters.ContainsKey(propertyType))
{
defaultPropertyFormatter = DefaultPropertyFormatters[propertyType];
}
if (fileExportSpecification.DefaultPropertyFormatters.ContainsKey(propertyType))
{
defaultPropertyFormatter = fileExportSpecification.DefaultPropertyFormatters[propertyType];
}
// If there's a default
if (props.DefaultTypeFormatters.ContainsKey(propertyType))
{
defaultPropertyFormatter = props.DefaultTypeFormatters[propertyType];
}
var property = new Property(objectType, propertyName, defaultPropertyFormatter, fileExportSpecification.DefaultHeaderFormatter, i);
props.AddProperty(property);
}
}
}
public static string ExportToString(this FileExportSpecification spec, IEnumerable items)
{
var sb = new StringBuilder();
using (var sw = new StringWriter(sb))
{
ExportToStream(spec, items, sw);
}
return(sb.ToString());
}
public FileExportSpecification CreateSpec(IEnumerable <Type> supportedTypes, Action <FileExportSpecification> configuration)
{
var fileExportSpecification = new FileExportSpecification(supportedTypes, ",", Environment.NewLine);
configuration(fileExportSpecification);
foreach (var supportedType in supportedTypes)
{
if (!fileExportSpecification.SkipNonConfiguredProperties)
{
ConfigureRestOfProperties(supportedType, fileExportSpecification);
}
}
return(fileExportSpecification);
}
public static void ExportToStream(this FileExportSpecification spec, IEnumerable items, TextWriter writer)
{
bool isFirstRow = true;
foreach (object item in items)
{
if (!isFirstRow)
{
writer.Write(spec.RowDelimiter);
}
else
{
//TODO: Not happy with the API for prepending and appending to a file
// Write any pre-header information
var prePendValue = spec.PrePendFileWithValue;
if (!string.IsNullOrEmpty(prePendValue))
{
writer.Write(prePendValue);
writer.Write(spec.RowDelimiter);
}
// Write the Header row
if (spec.IncludeHeader)
{
writer.Write(WriteTheHeader(item.GetType(), spec));
writer.Write(spec.RowDelimiter);
}
}
isFirstRow = false;
string rowText = ReadItemIntoRow(spec, item);
writer.Write(rowText);
}
writer.Write(spec.RowDelimiter);
//TODO: Not happy with the API for prepending and appending to a file
var apendValue = spec.AppendFileWithValue;
if (!string.IsNullOrEmpty(apendValue))
{
writer.Write(apendValue);
}
}
private static string WriteTheHeader(Type type, FileExportSpecification spec)
{
var sb = new StringBuilder();
var allPropertyValues = spec.GetPropertiesForType(type).Values.ToList();
for (var i = 0; i < allPropertyValues.Count; i++)
{
var property = allPropertyValues[i];
string formattedValue = property.GetFormattedHeader();
sb.Append(formattedValue);
if (i < (allPropertyValues.Count - 1))
{
sb.Append(spec.ColumnDelimiter);
}
}
return(sb.ToString());
}
