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using DocumentFormat.OpenXml.Packaging; |
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using DocumentFormat.OpenXml.Spreadsheet; |
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using System; |
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using System.Collections.Generic; |
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using System.IO; |
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using System.Linq; |
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using System.Text; |
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using System.Text.RegularExpressions; |
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using System.Threading.Tasks; |
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namespace ExcelHelperFW |
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{ |
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public class ExcelHelper |
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{ |
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private static readonly ExcelHelper _instance = new ExcelHelper(); |
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public static ExcelHelper Instance { get { return _instance; } } |
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/// <summary> |
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/// Get excel data |
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/// </summary> |
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/// <param name="sourcePath">excel path</param> |
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/// <param name="sheetName">sheet name</param> |
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/// <param name="rowStartPosition">row start position (first row = 1)</param> |
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/// <param name="tempPath">copy path</param> |
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/// <returns></returns> |
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/// <exception cref="Exception"></exception> |
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public List<Dictionary<string, string>> GetData(string sourcePath, string sheetName, bool removeHeader, int rowStartPosition = 1, string tempPath = "./temp_file.xlsx") |
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{ |
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File.Copy(sourcePath, tempPath, true); |
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List<Dictionary<string, string>> data = new List<Dictionary<string, string>>(); |
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StringBuilder sb = new StringBuilder(); |
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using (SpreadsheetDocument doc = SpreadsheetDocument.Open(tempPath, true)) |
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{ |
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WorkbookPart workbookPart = doc.WorkbookPart; |
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Sheet sheet = workbookPart.Workbook.Descendants<Sheet>().FirstOrDefault(s => s.Name == sheetName); |
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if (sheet == null) |
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throw new Exception("Cannot find sheet."); |
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WorksheetPart worksheetPart = (WorksheetPart)workbookPart.GetPartById(sheet.Id); |
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Worksheet worksheet = worksheetPart.Worksheet; |
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List<Row> rows = worksheet.Descendants<Row>().Where(r => r.RowIndex >= rowStartPosition).ToList(); |
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if (removeHeader) |
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rows.RemoveAt(0); |
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for (int i = 0; i < rows.Count; i++) |
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{ |
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Dictionary<string, string> rowPairs = RowToKeyValuePairs(rows[i], workbookPart); |
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if (rowPairs == null || rowPairs.Count < 1) |
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continue; |
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data.Add(rowPairs); |
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} |
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} |
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return data; |
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} |
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private Dictionary<string, string> RowToKeyValuePairs(Row row, WorkbookPart workbookPart) |
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{ |
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Dictionary<string, string> pairs = new Dictionary<string, string>(); |
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var cells = row.Elements<Cell>().ToList(); |
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for (int col = 0; col < cells.Count; col++) |
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{ |
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Cell cell = cells[col]; |
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string cellReference = cell.CellReference.Value; |
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string columnName = Regex.Replace(cellReference, @"\d", ""); |
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//int rowNumber = int.Parse(Regex.Replace(cellReference, "[^0-9]", "")); |
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string cellValue = cell.CellValue?.InnerText; |
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if (cell.DataType != null && cell.DataType.Value == CellValues.SharedString) |
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{ |
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int.TryParse(cellValue, out int sharedStringId); |
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cellValue = workbookPart.SharedStringTablePart.SharedStringTable.Elements<SharedStringItem>().ElementAt(sharedStringId).InnerText; |
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} |
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pairs.Add(columnName, cellValue); |
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} |
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return pairs; |
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} |
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private string ConvertValue(Dictionary<string, string> pairs, string key) |
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{ |
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if (!pairs.ContainsKey(key)) |
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return null; |
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return pairs[key]; |
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} |
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private T ConvertValue<T>(Dictionary<string, string> pairs, string key, Func<string, T> func) |
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{ |
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if (!pairs.ContainsKey(key) || func == null) |
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return default(T); |
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string value = pairs[key]; |
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return func(value); |
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} |
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private DateTime? ConvertValueToDateTime(Dictionary<string, string> pairs, string key) |
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{ |
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return ConvertValue<DateTime?>(pairs, key, x => |
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{ |
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if (string.IsNullOrEmpty(x)) |
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return null; |
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if (double.TryParse(x, out double d)) |
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return DateTime.FromOADate(d); |
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else |
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return null; |
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}); |
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} |
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} |
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} |
