From Excel to DataTable in C# with Open XML
I'm using Visual Studio 2008 and I need create a DataTable from a Excel Sheet using the Open XML SDK 2.0. I need to create it with the DataTable columns with the first row of the sheet and complete it with the rest of values.
Does anyone have a example code or a link that can help me to do this?
I think this should do what you're asking. The other function is there just to deal with if you have shared strings, which I assume you do in your column headers. Not sure this is perfect, but I hope it helps.
static void Main(string[] args)
{
DataTable dt = new DataTable();
using (SpreadsheetDocument spreadSheetDocument = SpreadsheetDocument.Open(@"..\..\example.xlsx", false))
{
WorkbookPart workbookPart = spreadSheetDocument.WorkbookPart;
IEnumerable<Sheet> sheets = spreadSheetDocument.WorkbookPart.Workbook.GetFirstChild<Sheets>().Elements<Sheet>();
string relationshipId = sheets.First().Id.Value;
WorksheetPart worksheetPart = (WorksheetPart)spreadSheetDocument.WorkbookPart.GetPartById(relationshipId);
Worksheet workSheet = worksheetPart.Worksheet;
SheetData sheetData = workSheet.GetFirstChild<SheetData>();
IEnumerable<Row> rows = sheetData.Descendants<Row>();
foreach (Cell cell in rows.ElementAt(0))
{
dt.Columns.Add(GetCellValue(spreadSheetDocument, cell));
}
foreach (Row row in rows) //this will also include your header row...
{
DataRow tempRow = dt.NewRow();
for (int i = 0; i < row.Descendants<Cell>().Count(); i++)
{
tempRow[i] = GetCellValue(spreadSheetDocument, row.Descendants<Cell>().ElementAt(i-1));
}
dt.Rows.Add(tempRow);
}
}
dt.Rows.RemoveAt(0); //...so i'm taking it out here.
}
public static string GetCellValue(SpreadsheetDocument document, Cell cell)
{
SharedStringTablePart stringTablePart = document.WorkbookPart.SharedStringTablePart;
string value = cell.CellValue.InnerXml;
if (cell.DataType != null && cell.DataType.Value == CellValues.SharedString)
{
return stringTablePart.SharedStringTable.ChildElements[Int32.Parse(value)].InnerText;
}
else
{
return value;
}
}
Hi The above code is working fine except one change
replace the below line of code
tempRow[i] = GetCellValue(spreadSheetDocument, row.Descendants<Cell>().ElementAt(i-1));
with
tempRow[i] = GetCellValue(spreadSheetDocument, row.Descendants<Cell>().ElementAt(i));
If you use (i-1) it will throw an exception:
specified argument was out of the range of valid values. parameter name index.
This solution works for spreadsheets without empty cells.
To handle empty cells, you will need to replace this line:
tempRow[i] = GetCellValue(spreadSheetDocument, row.Descendants<Cell>().ElementAt(i-1));
with something like this:
Cell cell = row.Descendants<Cell>().ElementAt(i);
int index = CellReferenceToIndex(cell);
tempRow[index] = GetCellValue(spreadSheetDocument, cell);
And add this method:
private static int CellReferenceToIndex(Cell cell)
{
int index = -1;
string reference = cell.CellReference.ToString().ToUpper();
foreach (char ch in reference)
{
if (Char.IsLetter(ch))
{
int value = (int)ch - (int)'A';
index = (index + 1) * 26 + value;
}
else
return index;
}
return index;
}
This is my complete solution where empty cell is also taken into consideration.
public static class ExcelHelper
{
//To get the value of the cell, even it's empty. Unable to use loop by index
private static string GetCellValue(WorkbookPart wbPart, List<Cell> theCells, string cellColumnReference)
{
Cell theCell = null;
string value = "";
foreach (Cell cell in theCells)
{
if (cell.CellReference.Value.StartsWith(cellColumnReference))
{
theCell = cell;
break;
}
}
if (theCell != null)
{
value = theCell.InnerText;
// If the cell represents an integer number, you are done.
// For dates, this code returns the serialized value that represents the date. The code handles strings and
// Booleans individually. For shared strings, the code looks up the corresponding value in the shared string table. For Booleans, the code converts the value into the words TRUE or FALSE.
if (theCell.DataType != null)
{
switch (theCell.DataType.Value)
{
case CellValues.SharedString:
// For shared strings, look up the value in the shared strings table.
var stringTable = wbPart.GetPartsOfType<SharedStringTablePart>().FirstOrDefault();
// If the shared string table is missing, something is wrong. Return the index that is in the cell. Otherwise, look up the correct text in the table.
if (stringTable != null)
{
value = stringTable.SharedStringTable.ElementAt(int.Parse(value)).InnerText;
}
break;
case CellValues.Boolean:
switch (value)
{
case "0":
value = "FALSE";
break;
default:
value = "TRUE";
break;
}
break;
}
}
}
return value;
}
private static string GetCellValue(WorkbookPart wbPart, List<Cell> theCells, int index)
{
return GetCellValue(wbPart, theCells, GetExcelColumnName(index));
}
private static string GetExcelColumnName(int columnNumber)
{
int dividend = columnNumber;
string columnName = String.Empty;
int modulo;
while (dividend > 0)
{
modulo = (dividend - 1) % 26;
columnName = Convert.ToChar(65 + modulo).ToString() + columnName;
dividend = (int)((dividend - modulo) / 26);
}
return columnName;
}
//Only xlsx files
public static DataTable GetDataTableFromExcelFile(string filePath, string sheetName = "")
{
DataTable dt = new DataTable();
try
{
using (SpreadsheetDocument document = SpreadsheetDocument.Open(filePath, false))
{
WorkbookPart wbPart = document.WorkbookPart;
IEnumerable<Sheet> sheets = document.WorkbookPart.Workbook.GetFirstChild<Sheets>().Elements<Sheet>();
string sheetId = sheetName != "" ? sheets.Where(q => q.Name == sheetName).First().Id.Value : sheets.First().Id.Value;
WorksheetPart wsPart = (WorksheetPart)wbPart.GetPartById(sheetId);
SheetData sheetdata = wsPart.Worksheet.Elements<SheetData>().FirstOrDefault();
int totalHeaderCount = sheetdata.Descendants<Row>().ElementAt(0).Descendants<Cell>().Count();
//Get the header
for (int i = 1; i <= totalHeaderCount; i++)
{
dt.Columns.Add(GetCellValue(wbPart, sheetdata.Descendants<Row>().ElementAt(0).Elements<Cell>().ToList(), i));
}
foreach (Row r in sheetdata.Descendants<Row>())
{
if (r.RowIndex > 1)
{
DataRow tempRow = dt.NewRow();
//Always get from the header count, because the index of the row changes where empty cell is not counted
for (int i = 1; i <= totalHeaderCount; i++)
{
tempRow[i - 1] = GetCellValue(wbPart, r.Elements<Cell>().ToList(), i);
}
dt.Rows.Add(tempRow);
}
}
}
}
catch (Exception ex)
{
}
return dt;
}
}
Public Shared Function ExcelToDataTable(filename As String) As DataTable
Try
Dim dt As New DataTable()
Using doc As SpreadsheetDocument = SpreadsheetDocument.Open(filename, False)
Dim workbookPart As WorkbookPart = doc.WorkbookPart
Dim sheets As IEnumerable(Of Sheet) = doc.WorkbookPart.Workbook.GetFirstChild(Of Sheets)().Elements(Of Sheet)()
Dim relationshipId As String = sheets.First().Id.Value
Dim worksheetPart As WorksheetPart = DirectCast(doc.WorkbookPart.GetPartById(relationshipId), WorksheetPart)
Dim workSheet As Worksheet = worksheetPart.Worksheet
Dim sheetData As SheetData = workSheet.GetFirstChild(Of SheetData)()
Dim rows As IEnumerable(Of Row) = sheetData.Descendants(Of Row)()
For Each cell As Cell In rows.ElementAt(0)
dt.Columns.Add(GetCellValue(doc, cell))
Next
For Each row As Row In rows
'this will also include your header row...
Dim tempRow As DataRow = dt.NewRow()
For i As Integer = 0 To row.Descendants(Of Cell)().Count() - 1
tempRow(i) = GetCellValue(doc, row.Descendants(Of Cell)().ElementAt(i))
Next
dt.Rows.Add(tempRow)
Next
End Using
dt.Rows.RemoveAt(0)
Return dt
Catch ex As Exception
Throw ex
End Try
End Function
Public Shared Function GetCellValue(document As SpreadsheetDocument, cell As Cell) As String
Try
If IsNothing(cell.CellValue) Then
Return ""
End If
Dim value As String = cell.CellValue.InnerXml
If cell.DataType IsNot Nothing AndAlso cell.DataType.Value = CellValues.SharedString Then
Dim stringTablePart As SharedStringTablePart = document.WorkbookPart.SharedStringTablePart
Return stringTablePart.SharedStringTable.ChildElements(Int32.Parse(value)).InnerText
Else
Return value
End If
Catch ex As Exception
Return ""
End Try
End Function