Develop Reference

Script C# in SSIS to manipulate an excel sheet

I'm trying to create an script C# in SSIS to create a new column in a sheet on Excel.
I need to know the IndentLevel of a cell in excel and for this i have to create a new column with this values.
I'm trying to do this (Script in c#):
Range values = sheet.get_Range("A13");
values.Value = sheet.Range["B13"].IndentLevel();
In VBA Works like this (Script in VBA inside of a excell):
Range("A16").Value = Range("B16").IndentLevel
In C# how can i do that? i'm trying everything but doenst work.
Complete script:
xlApp = new _Excel.Application();
xlApp.Visible = true;
oWB = (_Excel.Workbook)xlApp.Workbooks.Open(destFile);
_Excel.Worksheet sheet = (_Excel.Worksheet)xlApp.Worksheets[1];
sheet.Columns["B:N"].Delete();
Range values = sheet.get_Range("A13");
values.Value = sheet.Range["B13"].IndentLevel();

Getting rid of the parenthesis seems to do the task correctly.
string destFile = #"E:\StackOverflow\Sample.xlsx";
var xlApp = new Microsoft.Office.Interop.Excel.Application();
xlApp.Visible = true;
var oWB = (Microsoft.Office.Interop.Excel.Workbook)xlApp.Workbooks.Open(destFile);
Microsoft.Office.Interop.Excel.Worksheet sheet = (Microsoft.Office.Interop.Excel.Worksheet)xlApp.Worksheets[1];
sheet.Range["A16"].Value = sheet.Range["B16"].IndentLevel;
The value in cell A16 is set to B16's indent level.
The only other note is to make sure that the file isn't open elsewhere, otherwise the code will open up a read-only copy.

C# set opened workbook

I started creating an Excel-Add-IN with C#.
what I need to do is simple, I need to set a workbook to a variable, the workbook is already running, I tried this but did not work
Excel.Application excel = new Excel.Application();
Excel.Workbook wb = excel.ActiveWorkbook as Excel.Workbook;
wb.SaveAs("C:\\Users\\ro_sg\\Desktop\\Pasta1.xlsx");
Excel.Worksheet ws = wb.Worksheets["Plan1"];
Excel.Range range = ws.Range["A1"];
range.Value = "Success";
wb.Save();
The wb variable cannot find the workbook (gets null), and I can't see why.
Please, if any of you spot the mistake let me know.
Thanks!

I believe your issue is it may not be finding the active Excel application upstream from when you set your workbook variable. It appears that your code is trying to create a new excel application (without a workbook) rather than get the existing one that is open.
Give this a try:
Excel.Application excel = (Excel.Application)Marshal.GetActiveObject("Excel.Application");
Excel.Workbook wb = (Excel.Workbook)excel.ActiveWorkbook;
wb.SaveAs("D:\\WeeeDueceDuece.xlsx");

I don't know if you need to get a specific Sheet but if you try this: Excel.Worksheet ws = wb.Worksheets[1]; It will get the first Sheet of your Workbook

If your actual code doesn't have more in-between steps, it will always fail. I'm surprised this line didn't error:
Excel.Workbook wb = excel.ActiveWorkbook as Excel.Workbook;
It's because a new instance of Excel does not necessarily create a new workbook. You can check this with the following lines:
Excel.Application application = new Excel.Application();
Excel.Workbooks workbooks = application.Workbooks;
Console.WriteLine(workbooks.Count); // "0"
The new workbook, however, should create the default number of worksheets (usually 3, but editable).

Insert HTML into Excel cell

I have an auditing system built in ASP.NET and C#, where users can insert comments, and those comments can be HTML formatted with tables (<table>), "enters" (<br>), lists (<ul><li>), underlined text (<u>), latin-accented leters (í, ó, á, é, ú), among others.
I need to export those comments into Excel cells, and that its HTML elements to render correctly, only in ONE cell.
It should look like this:
I tried with interop, but I just see it as plain text
worksheet.Cells[1, 1] = htmlText;
Like this:
I also tried copying it to the clipboard, but I get a mess:
Clipboard.SetText(htmlTable);
Microsoft.Office.Interop.Excel.Application xlexcel;
Microsoft.Office.Interop.Excel.Workbook xlWorkBook;
Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet;
object misValue = System.Reflection.Missing.Value;
xlexcel = new Microsoft.Office.Interop.Excel.Application();
xlexcel.Visible = true;
xlWorkBook = xlexcel.Workbooks.Add(misValue);
xlWorkSheet = (Worksheet)xlWorkBook.Worksheets.get_Item(1);
Microsoft.Office.Interop.Excel.Range CR = (Range)xlWorkSheet.Cells[1, 1];
CR.Select();
xlWorkSheet.Paste(CR, false);
And I see it like this
I also tried with iceblue but it only supports "span" elements and paragraphs, not complex elements as tables, lists, etc.
Any ideas?

Ok, I found something similar here html-text-with-tags-to-formatted-text-in-an-excel-cell
The difference is they are working in Excel and you've got an ASP.NET site; so we're going to have to get a bit creative.
Step 1: Reference the following COM object "Microsoft Internet Controls" (SHDocView)
Step 2: Add the following using statement to your code
using SHDocVw;
Step 3: Try the following code:
var ie = new InternetExplorer();
ie.Visible = false;
ie.Navigate("about:blank");
ie.Document.body.innerHTML = htmlTable; //Yes, this is the correct casing
ie.Document.body.createtextrange.execCommand("Copy");
var xlExcel = new Application();
xlExcel.Visible = true;
var misValue = System.Reflection.Missing.Value;
var xlWorkBook = xlExcel.WorkBooks.Add(misValue);
var xlWorkSheet = (WorkSheet)xlWorkBook.Worksheets.get_Item(1);
var range = (Range)xlWorkSheet.Cells[1, 1];
range.Select();
xlWorkSheet.Paste();

Freeze Panes in multiple worksheets C#

I am working on MS Excel 2013 generating report where all the worksheets in workbook should have freeze pane at column 6 and row 1. I have searched on Google but could not find any solution as for freezing the pane, workbook has to be active. I have tried a lot of things but no success. I will really appreciate if someone can help me.
Excel.Application excel = new Excel.Application();
Excel.Workbook workbook = excel.Workbooks.Open("filelocation");
foreach (Excel.Worksheet ws in workbook.Worksheets)
{
ws.Application.ActiveWindow.SplitColumn = 6;
ws.Application.ActiveWindow.SplitRow = 1;
ws.Application.ActiveWindow.FreezePanes = true;
}
excel.Visible = true;

I Hope it help others. I have used ClosedXML Library for Excel and after creating each worksheet I used
worksheet.SheetView.Freeze(1,6);
This freezes the Row 1, Col 6. You can freeze any row/column.
Here is link to ClosedXML. It's widely supported and very good documentation.

To freeze the panes on each worksheet you need to modify your for loop to add a line to activate the current sheet prior to setting the other properties. Here is my solution:
Excel.Application excel = new Excel.Application();
Excel.Workbook workbook = excel.Workbooks.Open("filelocation");
foreach (Excel.Worksheet ws in workbook.Worksheets)
{
ws.Activate();
ws.Application.ActiveWindow.SplitColumn = 6;
ws.Application.ActiveWindow.SplitRow = 1;
ws.Application.ActiveWindow.FreezePanes = true;
}
excel.Visible = true;

delete excel worksheets programmatically

I have an excel workbook with many, many sheets. I want to delete all the sheets except for three of them.
Specifically, i would like to know if there is a way to remove the sheets using sheet name instead of ordinals (sheet number).
I am using excel interop and C# to work with Excel.
Microsoft.Office.Interop.Excel.Application xlApp = null;
Excel.Workbook xlWorkbook = null;
Excel.Sheets xlSheets = null;
Excel.Worksheet xlNewSheet = null;

xlApp.DisplayAlerts = false;
for (int i = xlApp.ActiveWorkbook.Worksheets.Count; i > 0 ; i--)
{
Worksheet wkSheet = (Worksheet)xlApp.ActiveWorkbook.Worksheets[i];
if (wkSheet.Name == "NameOfSheetToDelete")
{
wkSheet.Delete();
}
}
xlApp.DisplayAlerts = true;

I know this is old but I just use the fallowing
workBook.Sheets["Sheet1"].Delete();

I know this thread is really old but for future visitors, if you know the names of the sheets you want to delete, a better way is to loop over the names of the sheets like this:
Workbook book = excelApp.Workbooks.Open("filePathHere");
string[] sheetsToDelete = {"s1", "s2"};
excelApp.DisplayAlerts = false;
foreach(string sheetToDelete in sheetsToDelete )
{
book.Worksheets[sheetToDelete].Delete();
}
excelApp.DisplayAlerts = true;
It's always good practice to avoid deleting items in a collection while iterating through it.