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using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
namespace Tango.Documents
{
public class ExcelWriter : IDisposable
{
private Stream _stream;
private SpreadsheetDocument _document;
private List<DefinedName> _column_names;
public ExcelWriter(Stream source)
{
_stream = source;
_document = SpreadsheetDocument.Open(_stream, true);
_column_names = new List<DefinedName>();
if (_document.WorkbookPart.Workbook.GetFirstChild<DefinedNames>() != null)
{
foreach (DefinedName name in _document.WorkbookPart.Workbook.GetFirstChild<DefinedNames>())
{
_column_names.Add(name);
}
}
}
public ExcelWriter(String fileName) : this(new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite))
{
}
public void WriteData<T>(IEnumerable<T> data, String sheetName)
{
var props = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance).ToList();
WorksheetPart work_sheet_part = GetWorkSheetPart(sheetName);
Worksheet workSheet = work_sheet_part.Worksheet;
SheetData sheetData = workSheet.GetFirstChild<SheetData>();
List<Row> rows = sheetData.Elements<Row>().ToList();
var list = data.ToList();
for (int i = 0; i < list.Count; i++)
{
var item = list[i];
var last_row = sheetData.Elements<Row>().Last();
Row newRow = new Row();
newRow.RowIndex = last_row.RowIndex + 1;
sheetData.InsertAfter(newRow, last_row);
foreach (var prop in props)
{
var definedName = _column_names.SingleOrDefault(x => x.Name == prop.Name);
if (definedName != null)
{
SetCellRow(newRow, GetCellReference(definedName, i + 2), prop.GetValue(item));
}
}
}
}
private void SetCellRow(Row row, string cellReference, object value)
{
Cell cell = row.Descendants<Cell>().FirstOrDefault(c => c.CellReference == cellReference);
if (cell == null)
{
cell = new Cell();
cell.CellReference = cellReference;
}
cell.CellValue = new CellValue(value.ToString());
cell.DataType = CellValues.Number;
if (value is String)
{
cell.DataType = CellValues.String;
}
else if (value is DateTime)
{
cell.DataType = CellValues.Date;
}
else if (value is Boolean)
{
cell.DataType = CellValues.Boolean;
}
row.Append(cell);
}
private WorksheetPart GetWorkSheetPart(String sheetName)
{
var sheet = _document.WorkbookPart.Workbook.Descendants<Sheet>().FirstOrDefault(x => x.Name.Value == sheetName);
string relId = sheet.Id;
return (WorksheetPart)_document.WorkbookPart.GetPartById(relId);
}
private string GetCellReference(DefinedName name, int rowIndex)
{
Regex rowPatern = new Regex("^.*\\!\\$(.*)\\$\\d*$");
Match match = rowPatern.Match(name.Text);
return match.Groups[1].Value + rowIndex.ToString();
}
public void Dispose()
{
_document.Save();
_stream.Dispose();
}
}
}
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