计算一系列单元格的总和
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OpenXML Excel
下面是我们需要在代码中使用的命名空间:
using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
以下是代码:
string FilePath = @"..\..\..\..\Sample Files\";
string FileName = FilePath + "Calculate the sum of a range of cells.xlsx";
string worksheetName = "Sheet1";
string firstCellName = "A1";
string lastCellName = "A3";
string resultCell = "A4";
CalculateSumOfCellRange(FileName, worksheetName, firstCellName, lastCellName, resultCell);
private static void CalculateSumOfCellRange(string docName, string worksheetName, string firstCellName, string lastCellName, string resultCell)
{
// Open the document for editing.
using (SpreadsheetDocument document = SpreadsheetDocument.Open(docName, true))
{
IEnumerable<Sheet> sheets = document.WorkbookPart.Workbook.Descendants<Sheet>().Where(s => s.Name == worksheetName);
if (sheets.Count() == 0)
{
// The specified worksheet does not exist.
return;
}
WorksheetPart worksheetPart = (WorksheetPart)document.WorkbookPart.GetPartById(sheets.First().Id);
Worksheet worksheet = worksheetPart.Worksheet;
// Get the row number and column name for the first and last cells in the range.
uint firstRowNum = GetRowIndex(firstCellName);
uint lastRowNum = GetRowIndex(lastCellName);
string firstColumn = GetColumnName(firstCellName);
string lastColumn = GetColumnName(lastCellName);
double sum = 0;
// Iterate through the cells within the range and add their values to the sum.
foreach (Row row in worksheet.Descendants<Row>().Where(r => r.RowIndex.Value >= firstRowNum && r.RowIndex.Value <= lastRowNum))
{
foreach (Cell cell in row)
{
string columnName = GetColumnName(cell.CellReference.Value);
if (CompareColumn(columnName, firstColumn) >= 0 && CompareColumn(columnName, lastColumn) <= 0)
{
sum += double.Parse(cell.CellValue.Text);
}
}
}
// Get the SharedStringTablePart and add the result to it.
// If the SharedStringPart does not exist, create a new one.
SharedStringTablePart shareStringPart;
if (document.WorkbookPart.GetPartsOfType<SharedStringTablePart>().Count() > 0)
{
shareStringPart = document.WorkbookPart.GetPartsOfType<SharedStringTablePart>().First();
}
else
{
shareStringPart = document.WorkbookPart.AddNewPart<SharedStringTablePart>();
}
// Insert the result into the SharedStringTablePart.
int index = InsertSharedStringItem("Result: " + sum, shareStringPart);
Cell result = InsertCellInWorksheet(GetColumnName(resultCell), GetRowIndex(resultCell), worksheetPart);
// Set the value of the cell.
result.CellValue = new CellValue(index.ToString());
result.DataType = new EnumValue<CellValues>(CellValues.SharedString);
worksheetPart.Worksheet.Save();
}
}
// Given a cell name, parses the specified cell to get the row index.
private static uint GetRowIndex(string cellName)
{
// Create a regular expression to match the row index portion the cell name.
Regex regex = new Regex(@"\d+");
Match match = regex.Match(cellName);
return uint.Parse(match.Value);
}
// Given a cell name, parses the specified cell to get the column name.
private static string GetColumnName(string cellName)
{
// Create a regular expression to match the column name portion of the cell name.
Regex regex = new Regex("[A-Za-z]+");
Match match = regex.Match(cellName);
return match.Value;
}
// Given two columns, compares the columns.
private static int CompareColumn(string column1, string column2)
{
if (column1.Length > column2.Length)
{
return 1;
}
else if (column1.Length < column2.Length)
{
return -1;
}
else
{
return string.Compare(column1, column2, true);
}
}
// Given text and a SharedStringTablePart, creates a SharedStringItem with the specified text
// and inserts it into the SharedStringTablePart. If the item already exists, returns its index.
private static int InsertSharedStringItem(string text, SharedStringTablePart shareStringPart)
{
// If the part does not contain a SharedStringTable, create it.
if (shareStringPart.SharedStringTable == null)
{
shareStringPart.SharedStringTable = new SharedStringTable();
}
int i = 0;
foreach (SharedStringItem item in shareStringPart.SharedStringTable.Elements<SharedStringItem>())
{
if (item.InnerText == text)
{
// The text already exists in the part. Return its index.
return i;
}
i++;
}
// The text does not exist in the part. Create the SharedStringItem.
shareStringPart.SharedStringTable.AppendChild(new SharedStringItem(new DocumentFormat.OpenXml.Spreadsheet.Text(text)));
shareStringPart.SharedStringTable.Save();
return i;
}
// Given a column name, a row index, and a WorksheetPart, inserts a cell into the worksheet.
// If the cell already exists, returns it.
private static Cell InsertCellInWorksheet(string columnName, uint rowIndex, WorksheetPart worksheetPart)
{
Worksheet worksheet = worksheetPart.Worksheet;
SheetData sheetData = worksheet.GetFirstChild<SheetData>();
string cellReference = columnName + rowIndex;
// If the worksheet does not contain a row with the specified row index, insert one.
Row row;
if (sheetData.Elements<Row>().Where(r => r.RowIndex == rowIndex).Count() != 0)
{
row = sheetData.Elements<Row>().Where(r => r.RowIndex == rowIndex).First();
}
else
{
row = new Row() { RowIndex = rowIndex };
sheetData.Append(row);
}
// If there is not a cell with the specified column name, insert one.
if (row.Elements<Cell>().Where(c => c.CellReference.Value == columnName + rowIndex).Count() > 0)
{
return row.Elements<Cell>().Where(c => c.CellReference.Value == cellReference).First();
}
else
{
// Cells must be in sequential order according to CellReference. Determine where to insert the new cell.
Cell refCell = null;
foreach (Cell cell in row.Elements<Cell>())
{
if (string.Compare(cell.CellReference.Value, cellReference, true) > 0)
{
refCell = cell;
break;
}
}
Cell newCell = new Cell() { CellReference = cellReference };
row.InsertBefore(newCell, refCell);
worksheet.Save();
return newCell;
}
}
Aspose.Cells
string FilePath = @"..\..\..\..\Sample Files\";
string FileName = FilePath + "Calculate the sum of a range of cells.xlsx";
string worksheetName = "Sheet1";
string firstCellName = "A1";
string lastCellName = "A3";
string resultCell = "A4";
CalculateSumOfCellRange(FileName, worksheetName, firstCellName, lastCellName, resultCell);
private static void CalculateSumOfCellRange(string docName, string worksheetName, string firstCellName, string lastCellName, string resultCell)
{
//Instantiating a Workbook object
Workbook workbook = new Workbook(docName);
//Obtaining the reference of the worksheet by passing its Name
Worksheet worksheet = workbook.Worksheets[worksheetName];
//Adding a SUM formula to "A4" cell
worksheet.Cells[resultCell].Formula = "=SUM(" + firstCellName + ":" + lastCellName + ")"; // =SUM(A1:A3)
//Calculating the results of formulas
workbook.CalculateFormula();
//Get the calculated value of the cell
string value = worksheet.Cells["A4"].Value.ToString();
//Saving the Excel file
workbook.Save(docName);
}