setting Excel cell format from C# using late binding - c#

I'm using late binding to launch Excel from C# and copy data into it (Type.GetTypeFromProgID("Excel.Application"), Activator.CreateInstance, InvokeMember, and all that). I have this working fine, but I can't figure out how to set the cell format, specifically to make a cell bold. anyone have any idea how to do this?


I'm not sure how to do it late binding, but if you created an Excel helper class, this is probably the easiest way do what you want (I also added in color and number formating):
using System;
using Excel = Microsoft.Office.Interop.Excel;
public class MyClass
{
public void FormatRange(Excel.Worksheet sheet)
{
Excel.Range range = sheet.Cells["1","A"];
range.Interior.ColorIndex = 15;//This sets it to gray
range.Font.Bold = true;//Sets the Bold
range.NumberFormat = "#";//Sets it to numeric
}
}
Cheers!


SpreadsheetGear for .NET will let you read, modify and write Excel workbooks without relying on Excel being installed. If you are calling very many APIs, it will also run much faster than using Excel via COM Interop. Here is an example which loads a workbook, sets a cell's font to bold and saves the workbook:
SpreadsheetGear.IWorkbook workbook = SpreadsheetGear.Factory.GetWorkbook(#"C:\tmp\MyWorkbook.xlsx");
workbook.Worksheets["Sheet1"].Cells["A1"].Font.Bold = true;
workbook.Save();
You can see a number of live samples here and download the free trial here.
Disclaimer: I own SpreadsheetGear LLC

Related

Format databars rules using Microsoft.Office.Interop.Excel in C#

Currently I am trying to set databar color to red using Interop Excel in C# when export to xlsx file but I don't know the correct way of accessing the properties (E.g. bar color, direction) listed in the microsoft docs as there are no examples. Does anyone know how? Below is my code.
Excel.Range range1 = excelWorkSheet.Range["H4", "V4"];
range1.FormatConditions.AddDatabar();

Embed file in excel worksheet/cell

I hope someone can help me. Is there a way to embed a specific file (.txt) into an excel cell? I'm currently using epplus, and I would like to embed programmatically a file into a specific excel cell. I did manage to add a hyperlink, but my goal is to have it embedded.
Worksheet.Cells[rowNumber, colNumber].Value = ....
Is there any way to do it? I couldn't find anything online.

As mentioned in the comments, you can certainly put text within a cell, but bear in mind Excel does have a limit to the number of characters it will allow in a single cell. It's pretty large, but conceivably the contents of a text file could exceed that limit -- even if future versions of Excel keep increasing what the limit is (as they have in the past).
You can also embed an OLE object in your worksheet, and a text file qualifies for that. I don't know that you can assign it to a cell, per se. You can change the location, shape and behavior to fit in a cell and behave as though it's part of a cell, but I don't know that it ever belongs to a range the way formulas do. I could be wrong.
The basic construct of how to embed an OLE object into a worksheet is as follows:
Excel.OLEObject ole = ws.OLEObjects().Add(Filename: #"C:\Users\hambone\Documents\foo.txt");
This is the equivalent of the VBA:
Set ole = sh.OLEObjects.Add(Filename:="C:\Users\hambone\Documents\foo.txt")
The method returns an OLEObject object, which you can then shape to behave the way you want:
ole.Height = 5;

C# NPOI and sheet scale: how to set "scaling mode"?

I'm using NPOI 1.2.5 with C# to generate some worksheet.
I need to set my sheet "Scaling mode" to "Reduce/enlarge printout" (see the last option of this LibreOffice screenshot)
No matter how hard I try, my generated sheet always have "Fit print rage..."
I'm stuck on this problem since the last summer, so any help is really appreciated.
Thanks!

myWorksheet.FitToPage = false; did the trick!

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()

Microsoft.Office.Interop.Excel.Worksheet.Cells[x,y].Style?

I found some code which uses Style property of Microsoft.Office.Interop.Excel.Worksheet.Cells[x,y] but it is treated as an object in my Visual Studo code editor:
Workbook wb = new Application.Workbooks.Add(XlWBATemplate.xlWBATWorksheet);
Worksheet ws = wb.Sheets[1];
ws.Cells[x,y] is simply treated as an object so how can I use its Style property?
I'm using Microsoft Excel 15.0 Objects Library (goes with Microsoft Office 2013). Does that matter?
Could you please explain this to me? Thank you.

you have to cast the object as a Range.
The Range interface/object contains all the style and value information for the cell or range that you are specifying.
some examples:
((Excel.Range)ws.Cells[r, c]).NumberFormat = format;
((Excel.Range)ws.Cells[r, c]).Value2 = cellVal;
((Excel.Range)ws.Cells[r, c]).Interior.Color = ColorTranslator.ToOle(Color.Red);
((Excel.Range)ws.Cells[r, c]).Style.Name = "Normal"
etc etc and so on.
Have a link:
https://learn.microsoft.com/en-us/office/vba/api/Excel.Range.Style

You might also like to check out stackoverflow.com/questions/15366340/ which includes cell formatting while exporting to excel.

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