关于OpenXml SpreadSheet列宽根据内容的Auto-suitability

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Linq;
  4 using DocumentFormat.OpenXml;
  5 using DocumentFormat.OpenXml.Packaging;
  6 using DocumentFormat.OpenXml.Spreadsheet;
  7 
  8 namespace OpenXmlGenerateExcelTest
  9 {
 10     class Program
 11     {
 12         static void Main()
 13         {
 14             CreateSpreadSheet();
 15         }
 16 
 17         private static void CreateSpreadSheet()
 18         {
 19             string fileName = "X:\\01.xlsx";
 20             string sheetName = "测试表格sheet—1";
 21             using (SpreadsheetDocument spreadSheet = SpreadsheetDocument.Create(fileName, SpreadsheetDocumentType.Workbook))
 22             {
 23                 spreadSheet.AddWorkbookPart();
 24                 spreadSheet.WorkbookPart.Workbook = new Workbook();
 25 
 26                 WorksheetPart worksheetPart1 = spreadSheet.WorkbookPart.AddNewPart<WorksheetPart>();
 27                 worksheetPart1.Worksheet = new Worksheet();
 28                 SheetData sheetData = new SheetData();
 29                 ProductData(sheetData);
 30                 worksheetPart1.Worksheet.AppendChild(AutoFit(sheetData));
 31                 worksheetPart1.Worksheet.AppendChild(sheetData);
 32 
 33                 spreadSheet.WorkbookPart.WorksheetParts.ElementAt(0).Worksheet.Save();
 34 
 35                 spreadSheet.WorkbookPart.Workbook.AppendChild(new Sheets());
 36                 spreadSheet.WorkbookPart.Workbook.GetFirstChild<Sheets>().AppendChild(new Sheet()
 37                 {
 38                     Id = spreadSheet.WorkbookPart.GetIdOfPart(spreadSheet.WorkbookPart.WorksheetParts.First()),
 39                     SheetId = 1,
 40                     Name = sheetName
 41                 });
 42 
 43                 spreadSheet.WorkbookPart.Workbook.Save();
 44             }
 45         }
 46 
 47         private static void ProductData(SheetData sheetData)
 48         {
 49             for (uint rowIndex = 1; rowIndex < 5; rowIndex++)
 50             {
 51                 Row row = new Row() { RowIndex = rowIndex };
 52                 for (char cellIndex = ‘A‘; cellIndex < ‘F‘; cellIndex++)
 53                 {
 54                     Cell cell = new Cell();
 55                     string innerText = "12234433433";
 56                     cell.CellValue = new CellValue(innerText);
 57                     cell.DataType = new EnumValue<CellValues>(CellValues.String);
 58                     row.Append(cell);
 59                 }
 60                 for (char cellIndex = ‘F‘; cellIndex < ‘K‘; cellIndex++)
 61                 {
 62                     Cell cell = new Cell();
 63                     string innerText = "12234";
 64                     cell.CellValue = new CellValue(innerText);
 65                     cell.DataType = new EnumValue<CellValues>(CellValues.String);
 66                     row.Append(cell);
 67                 }
 68                 sheetData.Append(row);
 69             }
 70         }
 71 
 72         private static Columns AutoFit(SheetData sheetData)
 73         {
 74             var maxColWidth = GetMaxCharacterWidth(sheetData);
 75 
 76             Columns columns = new Columns();
 77 
 78             double maxWidth = 7;
 79             foreach (var item in maxColWidth)
 80             {
 81                 /*三种单位宽度公式*/
 82                 double width = Math.Truncate((item.Value * maxWidth + 5) / maxWidth * 256) / 256;
 83                 double pixels = Math.Truncate(((256 * width + Math.Truncate(128 / maxWidth)) / 256) * maxWidth);
 84                 double charWidth = Math.Truncate((pixels - 5) / maxWidth * 100 + 0.5) / 100;
 85 
 86                 Column col = new Column() { BestFit = true, Min = (UInt32)(item.Key + 1), Max = (UInt32)(item.Key + 1), CustomWidth = true, Width = (DoubleValue)width };
 87                 columns.Append(col);
 88             }
 89             return columns;
 90         }
 91 
 92         private static Dictionary<int, int> GetMaxCharacterWidth(SheetData sheetData)
 93         {
 94             Dictionary<int, int> maxColWidth = new Dictionary<int, int>();
 95             var rows = sheetData.Elements<Row>();
 96             foreach (var r in rows)
 97             {
 98                 var cells = r.Elements<Cell>().ToArray();
 99                 for (int i = 0; i < cells.Length; i++)
100                 {
101                     var cell = cells[i];
102                     var cellValue = cell.CellValue == null ? string.Empty : cell.CellValue.InnerText;
103                     var cellTextLength = cellValue.Length;
104                     if (maxColWidth.ContainsKey(i))
105                     {
106                         var current = maxColWidth[i];
107                         if (cellTextLength > current)
108                         {
109                             maxColWidth[i] = cellTextLength;
110                         }
111                     }
112                     else
113                     {
114                         maxColWidth.Add(i, cellTextLength);
115                     }
116                 }
117             }
118             return maxColWidth;
119         }
120     }
121 }