Develop Reference

How to find end and beginning of contiguous data range in Excel using c#?

I have several files I need to open automatically and then import via SSIS.
Problem is, the relevant range in each file is different, and does not necessarily start at cell A1.
When I open a file, press CTRL+End, it will activate the last cell in the sheet. Pressing CTRL+A will now select exactly the range that I need. So this is what I'm trying to automate.
I can implement the first part, of finding the last cell, with
worksheet.UsedRange.SpecialCells(Excel.XlCellType.xlCellTypeLastCell, Type.Missing);
But I can't figure out how to mimic the Select All command, that's selecting only the adjacent cells with data.

currentRegion did it!
https://learn.microsoft.com/en-us/office/vba/api/excel.range.currentregion
worksheet.UsedRange.SpecialCells(Excel.XlCellType.xlCellTypeLastCell, Type.Missing).CurrentRegion;

SSIS - Import Excel file and stop at first empty row

I am importing an Excel table into my SSIS-Package.
What I know:
I know at which row the data in the Excel file starts
I know how many columns I need
I know that after the last import row there comes an empty row
So the amount of rows vary. How can I tell SSIS to import the data until the first empty row. My idea is to write a script in C# and to store the row ID of the empty row in a variable. With that variable I could specify the import matrix of my excel file.
Actually I do not have any experiences in C#. Can anyone help me with that? Or does anyone have a better idea?
Thank you in advance!!

Copying Data with Skipped Columns From Excel and Pasting into DataGridView

I've managed to copy from excel and paste it into a datagridview in C#. But when I hold down ctrl, select columns that aren't adjacent to each other, copy and paste into datagridview - all the columns in between were also pasted. Is there a way around this without actually opening the Workbook?
Current implementation simply retrieves Clipboard.GetDataObject().GetData, formats that into a string and delimit by tab.

Unfortunately excel just copies everything not just your selected columns for outside world. You can view what is copied to the clipboard using a clipboard viewer (I've used Free Clipboard Viewer). I've created a worksheet with following
1,2,3,4,5,6
1,2,3,4,5,6
1,2,3,4,5,6
1,2,3,4,5,6
and selected and copied columns 2, 4 and 6. clipboard viewer shows me what I've copied not three columns but all columns from 2 to 6 (actually Sheet!C2:C6).
You can always open excel using interop or 3rd party component and get what you need and paste it manually which I had to do for converting a grid to excel like grid. I manually parsed comma separated values and set the cells individually.

edokan is right when he says that the middle columns are also copied. Is there a setting in Excel which can prevent that? NO.
However here is the simplest way to do achieve what you want.
Before copying Delete unnecessary columns. Then copy and paste. Once done you have two options
Close the Excel file without saving
Press CTRL + Z to undo.
If you want a Code solution then yes there is a possibility. Create a VSTO Add-In. What this Add-In will do is copy the relevant columns to clipboard. Not the same as CTRL + C

how to move entire existing excel range to one row down using interop in C#

how to move entire existing excel range to one row down using interop in C#?
I need to add a header in 1st row of existing excel which has only data.I want to move the entire rangel one setup down programatically in C#.
I saw moving a cell stuff,but moving the entrire range was not clear.
could you please help me with it.

I agree if you are running on a server, CloseXML is a better solution, but if you want to go the interop way:
Here is the code to add a row and shift the existing data down by one row.
// Inserts a new row at the beginning of the sheet
Microsoft.Office.Interop.Excel.Range a1 = sheet.get_Range( "A1", Type.Missing );
a1.EntireRow.Insert(Microsoft.Office.Interop.Excel.XlInsertShiftDirection.xlShiftDown,
Type.Missing );
After you have inserted your new row at the top, you can add the headers to the cells.
I assume you know how to open and access the sheets.

I am displaying the contents of an Excel file in a Gridview. How do I handle merged cells?

I want to read and display an excel file in a web page. I am using Microsoft.Office.Interop.Excel in .aspx.cs and GridView in .aspx. I am just reading it into a DataTable and binding it to GridView.
The problem with this is, I can't handle merged cells. For example, if two columns are merged in Excel, while displaying, it will show two columns with the value in first cell and second cell will be empty. I just want to retrieve the sheet as it is. Is there any way to achieve this?

Microsoft.Office.Interop.Excel is designed to provide programmatic access to excel files. It will do some formatting work (see Text property) but most of the difficulty of rendering is left to the consumer (your program).
MergeCells will return True if you have a merged cell and MergeArea will return a Range containing the merged cells. You can then use the RowSpan and ColumnSpan fields of the GridView's cells to duplicate the functionality.