I am creating a new .xls file for the Microsoft Office 2003 from existing template in C# using .NET 4.0 and Excel Interop Object Library. My template already contains all needed data and various formulas so my task is just to change some cells which are used in formulas as parameters. I do this without any problem...
The problem appears when i try to open my new file: when the file is opened at 1st time addins of excel doesnt work and as the result all the formulas show me error messages like "#NAME". When i launch the file again - everything is ok...
This makes me angry....
Does anybody know where the problem could be? And what is the solution??
Thank you in advance.
Do you open it Excel 2010? If so, then Excel thinks it's with macros and displays it incorrectly.
Basically, #Name error appears when the formula inside the cell can't be interpreted or is unknown.
The problem is related to the path of formulas, I guess in the first launch it can't correctly find the formulas path so in the next launches it shows them correctly.
Related
I know questions like this are around in stack and there are 3rd part libraries to do the trick but none of them is fixing my issue at the moment. So the issue.
I have an Excel workbook (.xlsx) with multiple sheets generated by another system. I have to read the data from this via SSIS and dump it to a SQL DB.
Now the issue is although the Excel sheet contains data and when I open manually it opens without any error and the data displays when I use a script task and use OLEDB connection to connect to the excel and open it up the connection is made successfully but when reading data the column names are not picked (I get F1, F2 likewise) and no data rows are read. I simply get a blank row and that's about it. I have tried with HDR= YES and NO and IMEX=1 and 0 but always the result is same.
Funny thing is if I open the excel sheet do some modification (like change a sheet name save and change back the sheet name and save and close) and after that I try to run the package the data gets picked without any issue (also I noticed that the file size increases from 164KB to 196KB). Now because of this what am trying to do is modify the the file a bit and save via code.
So the initial step I tried was through using Office.Interop.Excel and it works like a charm in my machine but on the server NO OFFICE so IT NO WORKS. And nope the IT guys are never going to install access engine or excel or anything there.
Then I tried via OpenXML and 3rd party library like NPOI and even via OLEDB connection to modify the file. in both NPOI and OLEDB methods the file got changed but still it didn't get picked up properly by the SSIS package (I noticed that the file size didn't change and remained at 164kb). In OpenXML it wasn't able to open the file and threw an error saying "the document cannot be opened because there is and invalid part with an unexpected content type".
So right now I am stuck with no proper method in sight and would appreciate any help in solving this either through c# code or any other SSIS method available. SSIS version am using is 2008.
Edit 1
So I noticed that the script task is able to read the data from the first sheet out f the multiple sheets but the other sheets are the problem. So somewhere the xml for these sheets are broken. Anyway I can copy the xml configs of the first sheet to other ones? Just a thought...
Edit 2
So the first sheet is of ContentType "application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml" while all the other sheets are of ContentType "application/xml"
Ultimately ended up using two libraries for this. The data was read without an issue by using exceldatareader (http://exceldatareader.codeplex.com/). Using this the data was read into a dataset easily and then it was written to a new Excel file using epplus (http://epplus.codeplex.com/).
After that when the new excel file was read via the SSIS package data got picked without an issue. Hope this will help someone out there.
folks,
Environment
Windows 8.1
Visual Studio 2013
C#
Issue
How do I write values and make charts on visible Excel sheets using NPOI (https://npoi.codeplex.com/).
Why do I want that?
I'm developing an application to measure temperature in an apparatus. To put together experimental data in one place, I'd like to record data on an Excel sheet and make a chart on the sheet. In addition, I'd like to keep the Excel sheet visible and check the chart updated in real time.
You could also make graphs on Windows Form apps with MeasurementStudio by NationalInstruments for example but considering the flexibility of Excel charts (size and xy range changeable, easy-to-use user interface, etc...), I'd like to stick to Excel.
You can easily do this with Microsoft.Office.Interop.Excel by
ExcelApp.visible = true;. However, this module requires users to release every COM object generated. Otherwise, the objects remain and eat up memory. This is the reason I prefer to use NPOI.
How can I achieve this? Any answers would be appreciated.
You cannot do this with NPOI. NPOI reads and writes data from serialized Excel files. You cannot access those files while Excel has them open, and even if you could, Excel simply wouldn't re-read the files so your modifications wouldn't show up.
The problem you describe comes down to "I want to interact with a running Excel instance without using Excel interop". That's not going to work.
I have a xlms excel file in which there are 2 spreadsheets, one contains a form of inputs and the other spreadsheet shows the output of these inputs (after doing some computation). I want a C# Application which give input to the spreadsheet 1 and get the output from the spreadsheet 2. I have Microsoft excel 2013 installed and using visual studio 2015.
I am unable to find any solution online. Please Help!
It will be better for you to implement the output logic in the c# program. It will require less time for you to develop instead of wasting time for searching a right library.
I have a small wpf product which requires exporting data to excel with out excel installed on the client machine.How to achieve this in C#.After exporting, this excel can be opened by Open office. All I wanted is to save excel file to the client hard disk. Even excel is not installed he should be able to save the file,he may not be read it without excel but should be able to save. I dont want to any 3rd party or some other open xmls.
Recently I downloaded a product which is able to export to excel without excel installed and able to open it with open office.
When i checked their binaries they contain office.dll ,Microsoft.Vbe.Interop.dll and Microsoft.Office.Interop.Excel.dll's only .I want to know how they are able to manage with these dlls.
I have already written code for this but its breaking when excel is not installed.
I have read many open xml and other stuff relating to this but not satisfied.
My requirement is too simple ,just exporting datatable data to excel,no reading back the data and no fancy oparations with excel.
Please give me suggestions and links will be appreciated.
Thanks in advance
Either work out with CSV format or you may like to use EPPlus library. See similar answer here
You can use CSV, XML, or ADO
How To Use ADO.NET to Retrieve and Modify Records in an Excel Workbook With Visual Basic .NET
xslt transformation can also to the job. i use it to export wpf datagrid data.
I'm writing a program that reads a text file, extracts information, and outputs it to a template Excel spreadsheet that already exists.
I've managed to do this on my computer using the Microsoft.Office.Interop.Excel reference and its related methods, and it works fine. I have Excel 2010. However the computers that this program will be used on mostly have either Excel 2000 or Excel 2003, and it won't work on them.
Does anyone know a way to make a program target all versions of Excel from 2000 upwards?
Cheers,
Greg
If your needs are simple and you don't have $900 for Aspose.Cells to throw around, you can do any of the following:
Use NPOI to read, inject data into, and export your template.
Create a basic HTML file with a table and just named it *.xls. You can save your template in Excel as HTML and replace bits and pieces to insert your data.
Create an XML file using Office 2002/2003 XML format, it's pretty straightforward (caveat: can't be read in Excel 2000). As above, you can save your template in XML Spreadsheet format, read it in, and do some simple stuff to inject your data.
You really need to target 2000 or under. 2010 and 2003 will open a 2000 format document whereas 2000 will not open a 2010 document. Office has a single format for 97-2000 and that's what you need to create to make everybody happy.
Interop depends on the version you have installed and I personally have dodged using interop due to its "unmanaged" nature (and it seems to love file locks).
If you want hassle free and extremely fast/powerful creation of Excel documents, you really can not do better than Aspose.Cells in my opinion.
Find it here.