Develop Reference

How do I add number in cell using openxml

I have trouble creating cells in excel using openXml. If I use Datatype Number I get a warning when opening the excel "We found a problem with some content in file.xlsx. Do you want us to try to recover as much as we can?"
And if I use datatype string I get the warning inside excel.
This is the code I use...
Cell newCell = new Cell() { CellReference = cellId };
row.InsertBefore(newCell, refCell);
newCell.CellValue = new CellValue(value);
newCell.DataType = new EnumValue<CellValues>(CellValues.String); // Generate warnings since number is type text in cell
//newCell.DataType = new EnumValue<CellValues>(CellValues.Number); // Generate error when open the file
newCell.StyleIndex = 0;
UPDATE, If I add a decimal value like 10.2 I get this error, but if I add just 10 as value without any decimals there is no error at all. So how can I add decimals without getting this error?

This is probably an issue with localization. The ToString() method of Decimal uses your current locale for the output. In your case that's likely a comma. OpenXML wants dots afaik.
You can force the locale to the ToString() method as shown in the examples here.
e.g.
value.ToString(CultureInfo.CreateSpecificCulture("en-US"));
edit. It could be that you need to do more, and convert it to scientific notation, as described here.
Edit2: Note the existence of OpenXML.DecimalValue

C# - Decimals not writing out to Excel

I have an ETL that's saving data to an Excel file. The issue is that the decimals are not being written out for integers. Example:
14.00
is being written out as
14
My code for writing out that line is
loWorksheet.Cells[liRowNum, 5] = lcAmount.ToString("0.00");
When I step through the code, it shows as 14.00, but on the Excel file it is not retaining the decimal places. Is this something that can be fixed in my code or is this an Excel issue? Any suggestions?

I'm quite sure you have to set format for your cells. I can't check right now, but it will be something like
xlYourRange.NumberFormat = "0.00";
You can check this question Set data type like number, text and date in excel column using Microsoft.Office.Interop.Excel in c#

If you really want the data to be displayed literally the way it is in the source file, you have to deal with trade-offs. The simplest way is to format the data as text. You can do this a cell at a time or for entire columns:
loWorksheet.Columns["A:E"].NumberFormat = "#";
The trade-off is it's just text at this point. You can't add, sum, average, whatever.
On the other hands, if your data looks like this:
4.0
4.00
4.000
You can't really keep it as numbers and expect to retain the original format without doing some funny business.
If it's consistently two decimal places, and you know it's going to be, then I agree with #RenatZamaletdinov's solution.
And you might want to consider other strings and what Excel might to do them
0000123 becomes 123
10/23 will probably render as a date, depending on your localization
12345678901234567890 will render as scientific notation probably
These are all avoided if you make the numeric format text (#), but again without knowing what you plan to do with the data, it's hard to say if this is the correct approach.

Wrap lcAmount.ToString("0.00");in a pair of quotes and put an equal sign in front of it. This will prevent excel from overriding the format.
loWorksheet.Cells[liRowNum, 5] = "=" + '"' lcAmount.ToString("0.00") + '"';

Excel Interlop Value vs Text vs Value2

Having some problems parsing numbers out of the following excel spread sheet.
The code:
var curQOH = toolkit.ExcelWorksheet.Cells[i, 28] as Range;
var curQAV = toolkit.ExcelWorksheet.Cells[i, 29] as Range;
if (!curQOH.Text.Contains("("))
Int32.TryParse(curQOH.Text, out lastQOH);
else
Int32.TryParse(curQOH.Value as string, out lastQOH);
if (!curQAV.Text.Contains("("))
Int32.TryParse(curQAV.Text, out lastQAV);
else
Int32.TryParse(curQAV.Value as string, out lastQAV);
The code above parses the positive numbers just fine. No issues. But it seems like it cannot parse negative number.
To my knowledge, Text is suppose to give me what the viewer sees so I would get (10) as an output. Value does give the right number but I cannot seem to parse that after casting to string. (this issue why I cant store the value as string or cast it to int, Excel cell value as string won't store as string)

Stoped using Excel Interlop and started using OpenXML Excel library

Getting NumberFormat of Range using Excel interop in C#

I am trying to use Microsoft.Office.Interop.Excel to read excel file in c#.
I want to read range of cells as it is way faster than reading cell one by one:
Range rbeg = (Range)sheet.Cells[1, i + 1];
Range rend = (Range)sheet.Cells[totalRowCount, i + 1];
Range range = sheet.get_Range(rbeg, rend);
column = (object[,])range.Value2;
The problem is when I want to get number format of cells by calling:
range.NumberFormat
I get System.DBNull. It works when I call it for single cell.
I want to distinguish between cells with numerical values and "%" values.
Any ideas?

See the documentation:
[NumberFormat] returns Null if all cells in the specified range
don't have the same number format.
What were you expecting it to do in this case?

Excel Interop currency format

I'm attempting to format a cell in excel to the currency format. So I go into excel, record a macro of me converting an ordinary cell to a currency format, take a look at the vb script and see that it outputs the following:
NumberFormat = "$ #,##0.00"
So i take that format and paste it into my code, it works to the extent that im getting the currency character before the values in my excel sheet. However, the format of the cell is still a number and excel places a little green triangle at the bottom left of the cell informing me that the format is incorrect (which it is, cos its supposed to be currency, but its set to number) is there any way in c# to actually set the cell to a "Currency" format?
thanks

The range object has a "Style" property... the intelisense metadata says that it is "Returns an object you can use" only but you can also just set the Style with that property. To get the built-in "Currency" style, use the "Styles" property of (for instance) a Workbook object.
Example:
using Excel = Microsoft.Office.Interop.Excel;
...
var excel = new Excel.Application();
var wb = excel.Workbooks.Add();
var sheet = (Excel.Worksheet)wb.Sheets[1];
((Excel.Range)sheet.Cells[3, 4]).Style = wb.Styles["Currency"];
In fact you can just set it to the string "Currency" which may be what Charles was suggesting.
((Excel.Range)sheet.Cells[3, 4]).Style = "Currency";

Ok i tried many that codes and i found this works better than other on any language/regional settings.
numberFormat = #"_-[$$-409]* #,##0.00_ ;_-[$$-409]* -#,##0.00 ;_-[$$-409]* ""-""??_ ;_-#_ ";

Not sure I understand your question:In Excel all numeric values including currency, integers and date/time are held as floating-point doubles. The Format of a value only controls how it is presented in the rendering (visible) layer. The green triangle tests do not include tests for formatting. Is the problem that you are creating a text value rather than a numeric value?