Open XML SDK 2.0 - how to update a cell in a spreadsheet?
Here is the working code. This is a prototype. For a larger number of changes, one might open the document only once. Also, there are some hard-coded things like sheet name and cell type that would have to be parameterized before this can be called production-ready. http://openxmldeveloper.org/forums/4005/ShowThread.aspx was very helpful.
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
using System.Xml;
using System.IO;
using System.Diagnostics;
namespace OpenXMLWindowsApp
{
public class OpenXMLWindowsApp
{
public void UpdateSheet()
{
UpdateCell("Chart.xlsx", "20", 2, "B");
UpdateCell("Chart.xlsx", "80", 3, "B");
UpdateCell("Chart.xlsx", "80", 2, "C");
UpdateCell("Chart.xlsx", "20", 3, "C");
ProcessStartInfo startInfo = new ProcessStartInfo("Chart.xlsx");
startInfo.WindowStyle = ProcessWindowStyle.Normal;
Process.Start(startInfo);
}
public static void UpdateCell(string docName, string text,
uint rowIndex, string columnName)
{
// Open the document for editing.
using (SpreadsheetDocument spreadSheet =
SpreadsheetDocument.Open(docName, true))
{
WorksheetPart worksheetPart =
GetWorksheetPartByName(spreadSheet, "Sheet1");
if (worksheetPart != null)
{
Cell cell = GetCell(worksheetPart.Worksheet,
columnName, rowIndex);
cell.CellValue = new CellValue(text);
cell.DataType =
new EnumValue<CellValues>(CellValues.Number);
// Save the worksheet.
worksheetPart.Worksheet.Save();
}
}
}
private static WorksheetPart
GetWorksheetPartByName(SpreadsheetDocument document,
string sheetName)
{
IEnumerable<Sheet> sheets =
document.WorkbookPart.Workbook.GetFirstChild<Sheets>().
Elements<Sheet>().Where(s => s.Name == sheetName);
if (sheets.Count() == 0)
{
// The specified worksheet does not exist.
return null;
}
string relationshipId = sheets.First().Id.Value;
WorksheetPart worksheetPart = (WorksheetPart)
document.WorkbookPart.GetPartById(relationshipId);
return worksheetPart;
}
// Given a worksheet, a column name, and a row index,
// gets the cell at the specified column and
private static Cell GetCell(Worksheet worksheet,
string columnName, uint rowIndex)
{
Row row = GetRow(worksheet, rowIndex);
if (row == null)
return null;
return row.Elements<Cell>().Where(c => string.Compare
(c.CellReference.Value, columnName +
rowIndex, true) == 0).First();
}
// Given a worksheet and a row index, return the row.
private static Row GetRow(Worksheet worksheet, uint rowIndex)
{
return worksheet.GetFirstChild<SheetData>().
Elements<Row>().Where(r => r.RowIndex == rowIndex).First();
}
}
}
The Code posted by @CDonner throws some exceptions, i have added some of the code that will take care of code, which throws an Exceptions, here it is
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
using System.Xml;
using System.IO;
using System.Diagnostics;
namespace Application.Model{
public class TempCode
{
public TempCode()
{
UpdateCell("E:/Visual Studio Code/Book1.xlsx", "120", 1, "A");
UpdateCell("E:/Visual Studio Code/Book1.xlsx", "220", 2, "B");
UpdateCell("E:/Visual Studio Code/Book1.xlsx", "320", 3, "C");
UpdateCell("E:/Visual Studio Code/Book1.xlsx", "420", 4, "D");
UpdateCell("E:/Visual Studio Code/Book1.xlsx", "520", 5, "E");
ProcessStartInfo startInfo = new ProcessStartInfo("E:/Visual Studio Code/Book1.xlsx");
startInfo.WindowStyle = ProcessWindowStyle.Normal;
Process.Start(startInfo);
}
public static void UpdateCell(string docName, string text,uint rowIndex, string columnName){
// Open the document for editing.
using (SpreadsheetDocument spreadSheet = SpreadsheetDocument.Open(docName, true))
{
WorksheetPart worksheetPart = GetWorksheetPartByName(spreadSheet, "Sheet2");
if (worksheetPart != null)
{
Cell cell = GetCell(worksheetPart.Worksheet, columnName, rowIndex);
cell.CellValue = new CellValue(text);
cell.DataType = new EnumValue<CellValues>(CellValues.Number);
// Save the worksheet.
worksheetPart.Worksheet.Save();
}
}
}
private static WorksheetPart GetWorksheetPartByName(SpreadsheetDocument document, string sheetName){
IEnumerable<Sheet> sheets =document.WorkbookPart.Workbook.GetFirstChild<Sheets>().
Elements<Sheet>().Where(s => s.Name == sheetName);
if (sheets.Count() == 0){
return null;
}
string relationshipId = sheets.First().Id.Value;
WorksheetPart worksheetPart = (WorksheetPart)document.WorkbookPart.GetPartById(relationshipId);
return worksheetPart;
}
private static Cell GetCell(Worksheet worksheet, string columnName, uint rowIndex)
{
Row row;
string cellReference = columnName + rowIndex;
if (worksheet.Elements<Row>().Where(r => r.RowIndex == rowIndex).Count() != 0)
row = worksheet.GetFirstChild<SheetData>().Elements<Row>().Where(r => r.RowIndex == rowIndex).FirstOrDefault();
else{
row = new Row() { RowIndex = rowIndex };
worksheet.Append(row);
}
if (row == null)
return null;
if (row.Elements<Cell>().Where(c => c.CellReference.Value == cellReference).Count() > 0) {
return row.Elements<Cell>().Where(c => c.CellReference.Value == cellReference).First();
}
else{
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,
StyleIndex = (UInt32Value)1U
};
row.InsertBefore(newCell, refCell);
worksheet.Save();
return newCell;
}
}
}
}
This is SDK 2.5 though, however, was very useful code found here: http://fczaja.blogspot.dk/2013/05/how-to-read-and-write-excel-cells-with.html
Needed to do a slight modification for text values to add them to the SharedStringTablePart.
// 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 one.
if (shareStringPart.SharedStringTable == null)
{
shareStringPart.SharedStringTable = new SharedStringTable();
}
int i = 0;
// Iterate through all the items in the SharedStringTable. If the text already exists, return its index.
foreach (SharedStringItem item in shareStringPart.SharedStringTable.Elements<SharedStringItem>())
{
if (item.InnerText == text)
{
return i;
}
i++;
}
// The text does not exist in the part. Create the SharedStringItem and return its index.
shareStringPart.SharedStringTable.AppendChild(new SharedStringItem(new Text(text)));
shareStringPart.SharedStringTable.Save();
return i;
}
And use it like this:
SharedStringTablePart shareStringPart = GetSharedStringTablePart(excelDoc);
// Insert the text into the SharedStringTablePart.
int index = InsertSharedStringItem(cellValue, shareStringPart);
// Set the value of cell A1.
cell.CellValue = new CellValue(index.ToString());
cell.DataType = new EnumValue<CellValues>(CellValues.SharedString);
I've been working with excel and found this helper library to be of great help (I've created my own helpers for word, would have saved at least 2 weeks if I was aware of this): https://www.nuget.org/packages/SimpleOOXML/
This is what is needed to update cell (writer.PasteText(...)):
MemoryStream stream = SpreadsheetReader.Create();
SpreadsheetDocument doc = SpreadsheetDocument.Open(stream, true);
WorksheetPart worksheetPart = SpreadsheetReader.GetWorksheetPartByName(doc, "Sheet1");
WorksheetWriter writer = new WorksheetWriter(doc, worksheetPart);
writer.PasteText("B2", "Hello World");
//Save to the memory stream
SpreadsheetWriter.Save(doc);
byte[] result = stream.ToArray();
FileStream file = new FileStream(@"D:\x1.xlsx", FileMode.Create);
file.Write(result, 0, result.Length);
file.Close();