Is it possible to create a conditional format or something like that where the format is depending on the value of the cell?
For example when there is "#000000" as cell value, the background color of the cell should be black.
It is possible to have a condition on the cell value but I did not find any example where the format is dynamic. And it is no Option to create a format for each possible hex-color =)
Yes it is possible to add such a conditional formatting dynamically using Aspose.Cells. Please add your desired conditional formatting using the Worksheet.ConditionalFormattings collection. It will be better if you create your conditional formatting using Microsoft Excel and then load your workbook using Aspose.Cells and observe the properties of your conditional formatting object by exploring Worksheet.ConditionalFormattings collection and then create the same conditional formatting object through code. If you find any difficulty, then please feel free to post in Aspose.Cells forum on Aspose Website.
Please also see this article for your help in working with conditional formatting.
http://www.aspose.com/docs/display/cellsnet/Conditional+Formatting
Note: I am working as Developer Evangelist at Aspose
I my c++ project I want to open an excel file and query data and identify the rows that matches the specific column values(more than one column). What is the best methodology to connect to excel and query the worksheets?
The excel might contain several thousands of records and hence it is very important to complete the search and show the results in quick time and optimum performance.
Request you to let me know more than one option and suggest the best out of it.
See here for a library (under an open CPOL) license another Stackoverflow user recommends:
https://stackoverflow.com/a/2879322/444255
In one of my program, I'm suppose to parse an excel sheet using C++ programming. I'm not suppose to use any third party tool. So, please let me know the code to parse excel sheet and read rows and columns of an selected excel sheet. Thanks in advance.
In order to read excel files you need some external tool like MS - Office Library. Why don't you export excel to CSV (Comma Seperated File) File->Save as->CSV(Comma Delimited).
Then you can read it just like normal txt file. You can open and edit just like worksheet in MS-Excel.
You can COM to access Excel; for an example, see http://www.wilmott.com/messageview.cfm?catid=10&threadid=26137 (from this question)
However to will probably be easier to use C++/CLI as a wrapper and access COM from .NET.
I use the Eclipse CDT for C development and I automate many mundance tasks using regexes. I have built up a set of quite complicated regexes that I use a lot which I have ended up keeping in a text file. Every time I want to use one of my commonly used regexes I have to copy the find and replace expressions into the find/replace dialog fields (separately) before using it. This can be very time consuming. Does anyone know of a plugin which would allow me to store and select from named fjnd/replace favourites that I can then apply to code in the editor?
The "Find" and "Replace" dialogs have a memory. If you use a regex, it is saved in this memory and you can select it later using the drop-down menu in each of "Find" and "Replace".
Besides from this, I don't think there's a plugin to do what you want to do...
I have a small Win32 console application which is essentially a test harness. I read data in, do some processing on it and currently just output some of the numbers to the console. This isn't a huge problem - I can get an idea of what the data looks like, but it would be much easier to analyse if there was a way of getting that information into a graph for each run of the software.
I've been getting to grips with GNUPlot recently, but can't work out a simple way to get the data sent to it. Has anyone tried this? ..or is there another graphing application I should try?
Excel and OO Calc are great tools and I've loaded .csv data into them for graphing data plenty of times myself. I was, however, hoping for a way to dynamically pipe data into a graphing application to avoid having to close/reopen excel and plot a graph each time I want to look at some data.
I think you can pipe data into GNUPlot (which is why I mentioned it) but the details of how to do so are rather scant.
A simple approach is to wtite the data out as CSV and then import it into a spreadsheet like Excel or OpenOffice to do the graph drawing.
Edit: Following your question, I got interested in GNUPlot myself - this is the simplest description of using it from the command line that I found: http://www.goldb.org/goldblog/CommentView,guid,f378e279-eaa5-4d85-b7d2-0339a7c72864.aspx
Never underestimate the power of Excel and a .csv data dump.
Writing data to a .csv file form C++ is not very difficult and there's lots of articles out there regarding the subject, for example: here, or just google.
Excel can easily load .csv's and then you can just use that to plot whatever graphs you require. THis is particularly useful if you just want a quick visual sanity check of results etc.
You don't really need to touch VBA to do this
In Excel you can set up a Data Connection to a file, it supports many files type but CSV does work fine.
Go to List item
Data Tab
Click Connections
Click Add
select the file
go to the connection properties - un-tick prompt for file name
set the required period.
close the connections dialog
select the start cell for importing the data - cell 1a on worksheet 2
click existing connections
select you data connection
flip to worksheet1 add your chart and hookup the data.
the chart will now update automatically
this is Excel 2007 - but think older version had this and I think OO can do it to.
You might also want to look into XMGrace which allows you to launch it and drive it dircetly from C/Fortran programs as shown here
Excel is completely script-able. Use the macro recorder to figure out the steps. Create the chart in its own sheet. Then save the chart using the GIF filter.
The actual import is something like:
ActiveChart.Export FileName:=something_dot_gif, FilterName:="GIF"
I just found an example of piping data into gnuplot on Cardiff University's website. Not tried it yet, but it looks promising!
[edit] ..and another which includes some notes for windows.
You can use MathGL - it can create a window (FLTK, GLUT or Qt) and display plot inside. Also it have large set of plot types and can work in console.