I am using oledb to read .xls files in my application. It is working fine but real issue comes when my excel contains merged cells in rows or in column.
This is the data in excel
This is how it show on screen using webgrid
The VERY first thing that I would say is STAY VERY FAR AWAY FROM MERGED CELLS IN EXCEL!! That is the work of the DEVIL. Ok, if you still want to do this, consider the following options (you don't have many options) . . .
using Spire.Xls;
namespace Detect_Merged_Cells
{
class Program
{
static void Main(string[] args)
{
Workbook workbook = new Workbook();
workbook.LoadFromFile("Sample.xlsx");
Worksheet sheet = workbook.Worksheets[0];
CellRange[] range = sheet.MergedCells;
foreach (CellRange cell in range)
{
cell.UnMerge();
}
workbook.SaveToFile("Output.xlsx",ExcelVersion.Version2010);
}
}
}
OR
Excel.Range firstCell = excelWorksheet.get_Range("A1", Type.Missing);
Excel.Range lastCell = excelWorksheet.Cells.SpecialCells(Excel.XlCellType.xlCellTypeLastCell, Type.Missing);
object[,] cellValues;
object[,] cellFormulas;
Excel.Range worksheetCells = excelWorksheet.get_Range(firstCell, lastCell);
cellValues = worksheetCells.Value2 as object[,];
cellFormulas = worksheetCells.Formula as object[,];
Related
I'm currently trying to copy a worksheet from a different workbook which i succeed by using Copy() and PasteSpecial(). However, I would like to know why the following code does not work even though many solutions online seems to use this approach.
Workbook currBook = Globals.ThisAddIn.GetActiveWorkbook();
Workbook copyBook = Globals.ThisAddIn.OpenWorkbook(Globals.ThisAddIn.Application.ActiveWorkbook.Path + #"\copyFile.xlsm", true, true);
//required worksheet
Worksheet copySheet = Globals.ThisAddIn.GetWorksheet(copyBook, "ToCopy");
copySheet.Copy(currBook.Worksheets[1]);
//close workbook
copyBook.Close();
Function used to get specific sheet:
public Excel.Worksheet GetWorksheet(Excel.Workbook book, string sheetName, bool create = false)
{
foreach (Excel.Worksheet sheet in book.Worksheets)
{
//worksheet with name found
if (sheet.Name == sheetName)
{
sheet.Activate();
return sheet;
}
}
//worksheet can't be found
if (create)
{
Excel.Worksheet sheet = book.Worksheets.Add();
sheet.Name = sheetName;
sheet.Activate();
return sheet;
}
return null;
}
There is no error from the stated code and the worksheet has been tested to exist. The program simply does not create a copy into currBook
Interestingly, I was just working on something else where this came up...
In order to specify a destination it's necessary to use Range.Copy, not Sheet.Copy:
copySheet.UsedRange.Copy(currBook.Worksheets[1].Range["A1"]);
If a destination can't be specified, then Excel puts the data in a new workbook.
I am trying to read an excel sheet using C# and store each row into an array. I am able to open the file but the code I am using currently reads to an "2D-Object" array but I would like to read the info into 1D-string arrays.
static void Main(string[] args)
{
// Reference to Excel Application.
Excel.Application xlApp = new Excel.Application();
Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(Path.GetFullPath("excelpractice1.xlsx"));
// Get the first worksheet.
Excel.Worksheet xlWorksheet = (Excel.Worksheet)xlWorkbook.Sheets.get_Item(1);
// Get the range of cells which has data.
Excel.Range xlRange = xlWorksheet.UsedRange;
// Get an object array of all of the cells in the worksheet with their values.
object[,] valueArray = (object[,])xlRange.get_Value(Excel.XlRangeValueDataType.xlRangeValueDefault);
// Close the Workbook.
xlWorkbook.Close(false);
// Relase COM Object by decrementing the reference count.
Marshal.ReleaseComObject(xlWorkbook);
// Close Excel application.
xlApp.Quit();
// Release COM object.
Marshal.FinalReleaseComObject(xlApp);
Console.ReadLine();
}
}
}
`
Sorry, I was trying to comment only. =X
But did it worked for you anyway? LinqToExcel is a great library for manipulate spreadsheets!
Please, let me know if has any doubt yet.
=)
I am trying to add a new worksheet to an Excel workbook and make this the last worksheet in the book in C# Excel Interop.
It seems really simple, and I thought the below code would do it:
using System.Runtime.InteropServices;
using Excel = Microsoft.Office.Interop.Excel;
namespace ConsoleApplication2
{
class Program
{
static void Main(string[] args)
{
var excel = new Excel.Application();
var workbook = excel.Workbooks.Open(#"C:\test\Test.xlsx");
workbook.Sheets.Add(After: workbook.Sheets.Count);
workbook.Save();
workbook.Close();
Marshal.ReleaseComObject(excel);
}
}
}
No such luck. I get this helpful error:
COMException was unhandled - Exception from HRESULT: 0x800A03EC
I found this page on Microsoft.com which suggested I try and add the sheet first and then move it so I tried that as shown below. I know that this webpage targets Excel 95 but the VBA is still there to use so I was hoping it would still work:
using System.Runtime.InteropServices;
using Excel = Microsoft.Office.Interop.Excel;
namespace ConsoleApplication2
{
class Program
{
static void Main(string[] args)
{
var excel = new Excel.Application();
var workbook = excel.Workbooks.Open(#"C:\test\Test.xlsx");
workbook.Sheets.Add();
workbook.Sheets.Move(After: workbook.Sheets.Count);
workbook.Save();
workbook.Close();
Marshal.ReleaseComObject(excel);
}
}
}
I get the same error as above. I have also tried passing the name of my last worksheet as a string as the After parameter in both the Add and Move methods, no joy!
That is what I have tried, so my question is how do I add a worksheet to an Excel workbook and make this the last sheet in the workbook using C# Excel Interop?
Thanks
Looking at the documentation here http://msdn.microsoft.com/en-us/library/microsoft.office.tools.excel.worksheet.move(v=vs.80).aspx, it indicates that the 'after' object isn't a numerical position; it's the object representing the sheet you want to position your sheet after. The code should probably be something like (untested):
workbook.Sheets.Add(After: workbook.Sheets[workbook.Sheets.Count]);
This should do the job:
wSheet.Move(Missing.Value, workbook.Sheets[workbook.Sheets.Count]);
This is the only way that works for me:
xlWorkSheet = (Microsoft.Office.Interop.Excel.Worksheet)xlWorkBook.Worksheets.Add
(System.Reflection.Missing.Value,
xlWorkBook.Worksheets[xlWorkBook.Worksheets.Count],
System.Reflection.Missing.Value,
System.Reflection.Missing.Value);
it works for me
WorkBook.Worksheets.Add(
System.Reflection.Missing.Value,
WorkBook.Worksheets[WorkBook.Worksheets.Count],
1,
System.Reflection.Missing.Value);
I am using c# to color particular cells of excel file.
i am using
Application excel = new Application();
Workbook wb = excel.Workbooks.Open(destPath);
Worksheet ws = wb.Worksheets[1];
ws.Cells[row, clmn].Interior.Color = XlRgbColor.rgbBlack;
to color cells..But this is not working..
It is giving an exception on the last line where i am coloring the cells
"Exception from HRESULT: 0x800A03EC"
I am unable to fix the exception
Can anyone help me out..
It might not work because the worksheet is protected.
You can check it the following way:
Application excel = new Application();
Workbook wb = excel.Workbooks.Open(destPath);
Worksheet ws = wb.Worksheets[1];
bool wasProtected = ws.ProtectContents;
if (wasProtected == true)
{
// unprotect the worksheet
}
else
{
ws.Cells[row, clmn].Interior.Color = XlRgbColor.rgbBlack;
}
...
if (wasProtected == true)
{
// protect back the worksheet
}
In my previous project I used the following snippet to Color Cells in Excel:
ws.Cells[row, clmn].Interior.Color = System.Drawing.ColorTranslator.ToWin32(Color.Black);
I tested the code that you have on a new Excel file and it works fine. However, I was able to reproduce the error when testing with a row value of 0. So maybe the problem is with the row and clmn values. Otherwise it must be something specific to your Excel file... maybe a protected cell or something along those lines.
I have datatable . I need to import those datatable values to Excel Template.How to achieve this
There are a number of options
Write the data out as an CSV file
Write the data out as an HTML table
Use Automation to manipulate a running Excel instance
Use OleDB Driver to create a Excel file. Another link from Microsoft.
Use a library like NPOI to write out an Excel file
Use a library like ExcelPackage to write out an Excel file
Use Office Open XML
Of the options, I like option 5 for performance and simplicity, especially when this is needed on the server side, option 6 is good if you require XLSX files rather than XLS, option 7 has a steep learning curve in comparison to 5 and 6.
Try this one -
// TO USE:
// 1) include COM reference to Microsoft Excel Object library
// add namespace...
// 2) using Excel = Microsoft.Office.Interop.Excel;
private static void Excel_FromDataTable(DataTable dt)
{
// Create an Excel object and add workbook...
Excel.ApplicationClass excel = new Excel.ApplicationClass();
// true for object template???
Excel.Workbook workbook = excel.Application.Workbooks.Add(true);
// Add column headings...
int iCol = 0;
foreach (DataColumn c in dt.Columns)
{
iCol++;
excel.Cells[1, iCol] = c.ColumnName;
}
// for each row of data...
int iRow = 0;
foreach (DataRow r in dt.Rows)
{
iRow++;
// add each row's cell data...
iCol = 0;
foreach (DataColumn c in dt.Columns)
{
iCol++;
excel.Cells[iRow + 1, iCol] = r[c.ColumnName];
}
}
// Global missing reference for objects we are not defining...
object missing = System.Reflection.Missing.Value;
// If wanting to Save the workbook...
workbook.SaveAs("MyExcelWorkBook.xls",
Excel.XlFileFormat.xlXMLSpreadsheet, missing, missing,
false, false, Excel.XlSaveAsAccessMode.xlNoChange,
missing, missing, missing, missing, missing);
// If wanting to make Excel visible and activate the worksheet...
excel.Visible = true;
Excel.Worksheet worksheet = (Excel.Worksheet)excel.ActiveSheet;
((Excel._Worksheet)worksheet).Activate();
// If wanting excel to shutdown...
((Excel._Application)excel).Quit();
}