Develop Reference

c# interop excel: Write 1D array to excel range

I want to copy an 1D array to a column range in excel. I'm using interop for this purpose.
I have already tried these things:
range.get_Resize(Ary.Length, 1).Value2 = Ary;
range.set_Value(Excel.XlRangeValueDataType.xlRangeValueDefault, Ary);
and as simple as range.Value = Ary;
I have tried using even range.value2, but these things copy the very first index value in the array to the entire range.
So say suppose, if there are 200 rows in the range and the array contains integers 101-300, than only 101 is copied throughout the range with the above tried methods.
Can anyone please help me with this? It would be more helpful if someone can explain me this strange behavior! Thanks in advance.
Note: I know I can do it through a for loop, but that takes time. I would surely like to know a method which takes less than a minute to iterate a million rows.

I seriously don't know what exactly is wrong with the above methods. But I found the solution:
Excel.Range range = sheetSource.UsedRange.Columns[columnIndx];
range.Value = application.WorksheetFunction.Transpose(Ary);

Filter Range by specific Color Index/RGB using Worksheet.Range.Autofilter(Field,Criteria,Operator)

I am doing some automated excel manipulation using C#. I have been having a hard time figuring out how to autofilter based on a specific color.
There is very little documentation about this type of manipulation, however I have found some VB.net and VBA code for it. I cannot seem to convert the code to C# as "RGB" is not usable as it is in VB.net and VBA (See VB.net code below).
Since there has been no answers to this questions, I want to specify the code that needs to be looked at. In Autofilter(Field,Criteria,Operator), I need to know the C# Microsoft.Office.Interop.Excel criteria that would let me choose a color to filter.
Here is what my code looks like:
Excel.Worksheet xs1:
Excel.Range xRange1;
Excel.Range xRange2;
Excel.Range lastrow;
Excel.Range lastcol;
lastrow = xs1.Rows.End[Excel.XlDirection.xlDown];
lastcol = xs1.Columns.End[Excel.XlDirection.xlToRight];
xRange1 = xs1.Cells[2, 14];
xRange2 = xs1.Cells[lastrow.Row, 14];
Below selects the entire sheet and adds an autofilter(), setting it to filter for color. This works fine, but how do I pick the color I want it to filter for?
xs1.Range["A1", xs1.Cells[lastrow.Row, lastcol.Column]].
AutoFilter(14,Excel.XlColorIndex.xlColorIndexAutomatic,
Excel.XlAutoFilterOperator.xlFilterCellColor);
Here is an example of what the autofilter code would look like in VB.net. It looks very similar to this in an excel macro as well.
xs1.Range("A1", xs1.Cells(lastrow.Row, lastcol.Column)).
AutoFilter(Field:=14,Criteria1:=RGB(0,202,255),
Operator:=Excel.XlAutoFilterOperator.xlFilterCellColors)

So this is how you pick the color index for any poor souls that need to figure it out themselves. I could not find this anywhere on the internet.
xs1.Range["A1", xs1.Cells[lastrow.Row, lastcol.Column]].
AutoFilter(14, xlBook.Colors[33], Excel.XlAutoFilterOperator.xlFilterCellColor);
The important part is the "xlBook.Colors[33]". xlBook being the Workbook. 33 being the color index.

I don't have any reputation points, so I must submit an answer instead of a comment. Anyway, thank you, thank you, thank you. I have spent weeks looking for this answer and happened to search the right key words to find this post. I signed up just to upvote the answer!
My scenario is not exactly like yours, but similar enough that you led me to the solution. So, I will share what worked for me. I am trying to filter by color index using PowerShell. However, PowerShell does not allow the RGB values, as in the VB.net example above. Now, for my contribution to the answer. If you are doing this in PowerShell then it will need to look like this:
$xlFilterCellColor = 8
$xl = New-Object -comobject excel.application
$xl.Visible = $true
$xl.DisplayAlerts = $False
$wb = $xl.Workbooks.Open("\\path\to\file.xlsx")
$ws = $wb.worksheets.items(1)
$xlCellTypeLastCell = 11
$used = $ws.usedRange
$lastCell = $used.SpecialCells($xlCellTypeLastCell)
$range = $ws.range(A1:$lastCell)
$range.select | out-null
$range.autofilter(1,$wb.colors(6),$xlFilterCellColor)
The operator decimal values are listed here. In the code above, I am filtering yellow colored cells. Cell index colors and values can be found here.

C# Interop Excel Range get_End is returning with 1 less element

I need to parse an Excel file. First I wrote an extension in Visual Basic inside the Excel file, all worked good. Now I need to port it to C# so it can be a separate application. While the functions I use are the same, the result is not the same...
When I choose from the GUI which Worksheet to parse, I do something like:
range = (workbook.Worksheets.get_Item(itemIndex) as Excel.Worksheet).UsedRange;
Then, for the first row I need to parse I do something like:
range.get_Range(range.Cells.get_Item(6, 2),
range.Cells.get_Offset(6,2).get_End(Excel.XlDirection.xlToRight)))
And I get the right result with all the fields I need.
The second time when I need to get another row, I do:
range.get_Range(range.Cells.get_Item(13, 3),
range.Cells.get_Offset(13, 3).get_End(Excel.XlDirection.xlToRight)))
This time it gives me all the elements except the last one. And I have more functions like this, some with XlDirection.xlDown and all of them return me the range without the last element.
I tried to swap the functions, thinking may be I need to release range and then acquire it again or something(wanted to check if it's always working only for the first function being executed) but it is always working only for the first example, whenever the function is being executed...
This is even stranger because it worked in VBA Excel.
I also tired with Excel.Application get_Range and Excel.Worksheet get_Range...
Anyone knows why this happens?

I managed to solve this strange behavior. It's not the correct way of getting out the data.
The correct way would be: range.get_Range(range.Cells[6, 2], (range.Cells[6, 2] as Excel.Range).get_End(Excel.XlDirection.xlToRight)) - for the first example.
Hope it helps somebody...

Auto column width in EPPlus

How to make columns to be auto width when texts in columns are long?
I use this code
Worksheet.Column(colIndex).AutoFitColumn() 'on all columns'
Worksheet.cells.AutoFitColumns()
Worksheet.Column(colIndex).BestFit = True 'on all columns'
None of these methods are working
Are there any ways to make it work?
Note: Some of my texts use Unicode.

Use AutoFitColumns, but you have to specify the cells, i assume the entire worksheet:
VB.NET
Worksheet.Cells(Worksheet.Dimension.Address).AutoFitColumns()
C#
Worksheet.Cells[Worksheet.Dimension.Address].AutoFitColumns();
Please note you need to call this method after filling the worksheet.

I have used this code with the version 3.1.3.0 of EPPlus and it is working:
worksheet.Column(1).AutoFit();
where a worksheet is the variable referencing the worksheet I have created in my code (not a class with a static method!).
Obviously you have to call this method after you have filled the columns.

Just wanted to point out you can fit cells with out specifying the range, just make sure to call this after you've formatted all columns etc:
worksheet.Cells.AutoFitColumns()

I know this is an old question, but I use the code below and it seems to directly address what you have tried to do.
using (var xls = new ExcelPackage())
{
var ws = xls.Workbook.Worksheets.Add("Some Name");
//**Add Column Names to worksheet!**
//**Add data to worksheet!**
const double minWidth = 0.00;
const double maxWidth = 50.00;
ws.Cells.AutoFitColumns(minWidth, maxWidth);
return pkg.GetAsByteArray();
}

I know is a little bit late but I've had the same problem today. If you have a worksheet.DefaultColWidthdefined, it won't work. I've removed that line and added Worksheet.cells.AutoFitColumns(); and it works now.

It's working just fine for me.
Try:
ExcelWorksheet wsSheet1 = ExcelPkg.Workbook.Worksheets.Add("Sheet1");
wsSheet1.Cells[wsSheet1.Dimension.Address].AutoFitColumns();
ExcelPkg.SaveAs();

The .NET Core as a successor of .NET doesn't support anymore the function autofit cells with EPPplus library.
worksheet.Cells.AutoFitColumns();
or
worksheet.Column(1).AutoFit();
causes exception:
"System.Drawing is not supported on this platform."
The System.Drawing assembly is dependent on GDI and Windows specific libraries which have to be replaced by another solution. The solution for this issue is to me unknown.

Had to use worksheet.Column(1).AutoFit(0); AutoFit() wasn't doing the trick.

You will need to calculate the width. There is no autosizing function in the library that will work as you intend.
Autofitcolumn will not work with wrapped text and cells with formulas.
Look at http://epplus.codeplex.com/discussions/218294?ProjectName=epplus for examples of how you can solve the problem.

I use this and is working well.
Dim objExcel As New ExcelPackage
Dim Sheet As ExcelWorksheet = objExcel.Workbook.Worksheets.Add("SheetName")
Sheet.Cells("B1:BN").AutoFitColumns()

How to append Values to Excel Range

I have an Excel workbook which has 3 worksheets with a named range defined for address A1:F10 in each sheet and have some values.
I wanted to have a range defined and set all the 3 worksheet range values to this.
Example
TempRange = Test1Range + Test2Range + Test3Range
Any help would be appreciated

IF all four ranges are the same size, then you can add 'em up with an array formula. Select the entire area of "TempRange", and type
=Test1Range + Test2Range + Test3Range
... and then, to enter it, hit CTRL+SHIFT+ENTER, not plain ENTER.
It's been a long time, and I use OpenOffice these days, so I might have details wrong. The general idea works, though, so even if this exact thing isn't right, googling for "Excel array formula" will probably turn up some helpful information.

I found the answer
Application.Union(Range1,Range2)