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How can I export data to an Excel file
(7 answers)
Closed 7 years ago.
I am new to C#. I am currently learning how to write a window form application. I want to export some of my data from my form to an Excel file.
I am wondering what is the best way to approach this problem?
I have looked through many tutorial site and YouTube video and most of them suggest to use a data grid view. One thing I notice is that datagridview work well with simple GUI layout like the textbox.
However, what if I have some other complicated components such as a checkbox and a comboBox in my form?
Data grid view seems not the best option to do it. Are there any other better solutions to this case?
The approach depends on the desired result. As far as I know, Excel is able to import from a delimiter-separated text file. Depending on the context, it might be a valid approach to programmatically write to a text file which is then read by Excel.
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Get the icon for a given extension
(4 answers)
Closed 7 years ago.
I want that a user can enter a filename and it shows him the "symbol" of the file.... like those ones:
I know that I could extract them out of their dlls and add them to my project, but I think there could be a solution which grabs them out of windows...
I would like to have a very simple implementation, because it'll be part of a school project and the examiners hate importing DLLs, it would be "unsafe", so , a function which is supported by C#'s default stuff would be very nice for me.
I found something that is much much much easier than importing DLLs or such higher things.
Icon.ExtractAssociatedIcon(filename);
it returns an icon, so you have to convert it to an Image:
(Image)new ImageConverter().ConvertFrom(Icon.ExtractAssociatedIcon(filename));
It even extracts icons of .exe 's, which is even more than I asked for.
I'm really happy that I can provide an easier answer. Thanks Stackoverflow ☺
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Closed 10 years ago.
Possible Duplicate:
Is there a way to overlay an application over a full-screened program?
Is it possible in C# to inject a text to process (like fraps for example), but without using any .dll injections?
Thanks in advance for responses.
#update
"A text" means some fast refreshing labels or something, which will show informations e.g.:
Name:Test
Pos: x=123,y=456,z=0
Level: Unknown
Something.....
You can use automation to send keyboard actions and suchlike to another program. Otherwise if there is no exposed API then things look bleak. See this question for an overview on the methods you use to send keystrokes.
EDIT: What you're asking for is not injection, it's an overlay. What you're looking to do is take control of the display buffer so that your overlay always has a higher z-index than whatever is being rendered. Take a look at this answer
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Closed 10 years ago.
Possible Duplicate:
What is the best way to parse html in C#?
I'm trying to write some code which uses a HttpWebRequest with GET method (or any suggested faster function), find a keyword on the page and then display what comes after it in various textviews.
The homepage it looks up will always be the same and will always find the same lines but with different data.
I've read about something called HtmlAgilityPack a lot but I cannot figure out if I can use it for this, nor how to.
Is there any faster functions to use to just get and find data within source?
Can I use HtmlAgilityPack, if so how (example please)?
Is there any easier way this can be done?
cheersnox
Yes you can use HtmlAgilityPack, if you want to extract text from tags
HtmlAgilityPack is an HTML parser that builds a read/write DOM from “real world” HTML files. It supports XPATH or XSLT and is tolerant with "real world" malformed HTML
In one line it use's XPath queries that real helps in extracting data quickly
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Closed 6 years ago.
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We have a crystal report that we need to send out as an e-mail, but the HTML generated from the crystal report is pretty much just plain ugly and causes issues with some e-mail clients. I wanted to export it as rich text and convert that to HTML if it's possible.
Any suggestions?
I would check out this tool on CodeProject RTFConverter. This guy gives a great breakdown of how the program works along with details of the conversion.
Writing Your Own RTF Converter
There is also a sample on the MSDN Code Samples gallery called Converting between RTF and HTML which allows you to convert between HTML, RTF and XAML.
Mike Stall posted the code for one he wrote in c# here :
https://learn.microsoft.com/en-us/archive/blogs/jmstall/writing-an-rtf-to-html-converter-posting-code-in-blogs
UPDATED:
I got home and tried the below code and it does not work. For anyone wondering, the clipboard does not just magically convert stuff like I'd hoped. Rather, it allows an application to sort of "upload" a data object with a variety of paste formats, and then then you paste (which in my metaphor would be the "download") the program being pasted into specifies its preferred format. I personally ended up using this code, which has been recommended previously, and it was enormously easy to use and very effective. After you have imported the code (in VStudio, Project -> Add Existing Files) you then just go html to rtf like this:
return HtmlToRtfConverter.ConvertHtmlToRtf(myRtfString);
or the opposite direction:
return RtfToHtmlConverter.ConvertHtmlToRtf(myHtmlString);
(below is my previous incorrect answer, in case anyone is interested in the chronology of this answer haha)
Most if not all of the above answers provide comprehensive, often Library-based solutions to the problem at hand.
I am away from my computer and thus cannot test the idea, but one alternative, cheap and vaguely hack-y method would be the following.
private string HTMLFromRtf(string rtfString)
{
Clipboard.SetData(DataFormats.Rtf, rtfString);
return Clipboard.GetData(DataFormats.Html);
}
Again, not totally sure if this would work, but just messing around with some html on my iPhone I suspect it would. Documentation is here. More in depth explanation/docs RE the getting and setting of data models in the clipboard can be found here.
(Yes I am fully aware I'm here years later, but I assume this question is one which some people still want answered).
If you don't mind getting your hands dirty, it isn't that difficult to write an RTF to HTML converter.
Writing a general purpose RTF->HTML converter would be somewhat complicated because you would need to deal with hundreds of RTF verbs. However, in your case you are only dealing with those verbs used specifically by Crystal Reports. I'll bet the standard RTF coding generated by Crystal doesn't vary much from report to report.
I wrote an RTF to HTML converter in C++, but it only deals with basic formatting like fonts, paragraph alignments, etc. My translator basically strips out any specialized formatting that it isn't prepared to deal with. It took about 400 lines of C++. It basically scans the text for RTF tags and replaces them with equivalent HTML tags. RTF tags that aren't in my list are simply stripped out. A regex function is really helpful when writing such a converter.
I think you can load it in a Word document object by using .NET office programmability support and Visual Studio tools for office.
And then use the document instance to re-save as an HTML document.
I am not sure how but I believe it is possible entirely in .NET without any 3rd party library.
I am not aware of any libraries to do this (but I am sure there are many that can) but if you can already create HTML from the crystal report why not use XSLT to clean up the markup?
You can try to upload it to google docs, and download it as HTML.