C#

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Binding Sample confusion Alvaro Mendez26-Nov-03 6:17 Alvaro Mendez 26-Nov-03 6:17  Please look at the sample code in this[^] MSDN page for the ControlBindingsCollection.Add method. What is the purpose of binding those rows to the control? How is that useful? Which of the 3 rows does it bind to? I guess I just don't understand the purpose of that code. Please enlighten me! Thanks in advance, Alvaro He who laughs last, thinks slowest. Re: Binding Sample confusion Heath Stewart26-Nov-03 8:26 Heath Stewart 26-Nov-03 8:26  The example binds various fields in a DataTable to properties of a control. Initially, the control is bound to the first row. When the Position is changed in a CurrencyManager (which you can get from the BindingContext of a control), the properties of that control then use properties of the row pointed to by the Position property. You should also look up information on the BindingContext property for controls for more details and sample code. If you've used Microsoft Access, think of a Form bound to a result set and with the navigation bar visible. When you click the navigation buttons, the Form's controls are bound to the data for the current result.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- Re: Binding Sample confusion Alvaro Mendez26-Nov-03 9:42 Alvaro Mendez 26-Nov-03 9:42  Thanks for clearing it up Heath. I should have seen the BindingContext property. I looked up CurrencyManager in MSDN and the example they have there[^] shows what you're talking about. Regards, Alvaro He who laughs last, thinks slowest. Design-time controls opopov26-Nov-03 5:44 opopov 26-Nov-03 5:44  Hello people, How can I load the control (like Button) in designMode on my form. It's meen that the control will be painted and proceeded by it own designer. regards, OPopov Re: Design-time controls Heath Stewart26-Nov-03 8:22 Heath Stewart 26-Nov-03 8:22  The control must still handle it's own painting, otherwise it wouldn't even show up (or redraw itself when necessary) at runtime. You can use the ControlDesigner that you would create to paint adornments (like grips) on the control, though. Painting is just part of any UI control.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- Re: Design-time controls opopov26-Nov-03 21:02 opopov 26-Nov-03 21:02  VS.NET IDE using designers to proceed controls painting and message handling at design-time. So we can see designers own paint on the IDE Design page (IMHO). And the problem is to emulate IDE Designer. It's meen that we can load control from assembly and show it on our own form. But we must see and touch control-designer not the control. Regards, OPopov Re: Design-time controls Heath Stewart28-Nov-03 3:25 Heath Stewart 28-Nov-03 3:25  No, any Windows Forms .NET hosting environment still lets the control paint itself. The routines are already there and pre-empting that would be stupid. Designers can paint on top of the controls. If the designer does pre-empt the painting, it isn't exposed through the .NET framework. This is all documented in the VSHIK and you should read it if you're wanting to venture this way.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- Invoking script methods from C# Browser Control snappa26-Nov-03 5:44 snappa 26-Nov-03 5:44  Hello, I have built a C# based application with the Web Browser control for the UI. This was fairly straight forward. I then needed to add some of my own external methods (i.e. scripting window.external.foo()) and that was achieved by hooking in with the GetExternal method of IDocHostUIHandler thanks to the help of the article written by Ted Faison. The last piece to the puzzle I need to solve is that I need to be able to lookup and invoke script (JScript / VBScript) methods that live within a downloaded web page. Can someone help here? I am having trouble getting access to the script control. Thank you. Re: Invoking script methods from C# Browser Control Andy Brummer26-Nov-03 6:00 Andy Brummer 26-Nov-03 6:00  If you know the names of the functions you can get the IHTMLWindow2 interface of the window object and call the execScript method. Re: Invoking script methods from C# Browser Control snappa26-Nov-03 8:10 snappa 26-Nov-03 8:10  Thank you. I'm looking for a clean way to detect whether the script function exists before attempting to exec it also. The program needs to fail gracefully and this interface doesn't seem to give me that option. Re: Invoking script methods from C# Browser Control Heath Stewart26-Nov-03 8:14 Heath Stewart 26-Nov-03 8:14  Then wrap that functionality in a try-catch block and handle the exception in the catch block.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- Re: Invoking script methods from C# Browser Control snappa26-Nov-03 10:43 snappa 26-Nov-03 10:43  I did that initially. The problem is that you blindly invoke a script that doesn't exist and the browser catches the error. This is what I'm trying to prevent. Thanks. Re: Invoking script methods from C# Browser Control Heath Stewart28-Nov-03 3:22 Heath Stewart 28-Nov-03 3:22  Then get the IHTMLDocument2 interface, get an IHTMLElementCollection from its scripts property, then enumerate the IHTMLScriptElement objects in the collection. There's various properties on said element that can help you identify what's in it. You can query the text element for a simple pattern match: "function[\s]+(\w+)". Each match will be your function name. The only other way that seems possible is to get the IHTMLDocument and get the IDispatch to the script engine from the Scripts property. It's not well documented what this is, but it seems evident that you could call IDispatch.GetTypeInfo, then from the ITypeInfo reference you get back (you may have to define this interface using the appropriate GUIDs and what-not yourself), call ITypeInfo.GetNames, then use the BSTR array to call IDispatch.GetIDsOfNames. Once you get those IDs, you can invoke them using IDispatch.Invoke. All these interfaces - except for ITypeInfo - should already be defined in the Microsoft.mshtml.dll assembly. ITypeInfo shouldn't be hard to define since you only need to define the interface so that the interface GUID, interface type, and optionally DispIDs match-up to the way the native interface is defined, taking into account all out and ref keywords, as well as necessary values in the MarshalAsAttribute and OutAttribute for interop.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- Where can I find details of namespaces? tom7626-Nov-03 5:18 tom76 26-Nov-03 5:18  I would like to know of a resource that has details on available namespaces. for example in C++ I'd use iostream.h for i/o operations, but in C# I do not know what I would use (all I know are System and Collections, but no details on the functions within them). Can anyone suggest somewhere? Obseve everything, remember more... Re: Where can I find details of namespaces? Nick Parker26-Nov-03 5:42 Nick Parker 26-Nov-03 5:42  Two sources that I would recommend: .NET Framework Documentation[^], Reflector[^]. Read the documentation, ask questions about things that are unclear. HTH -Nick Parker DeveloperNotes.com Re: Where can I find details of namespaces? J. Dunlap26-Nov-03 11:12 J. Dunlap 26-Nov-03 11:12  Nick's advice is what I would give you, too. But I wanted to throw in some things here: You'll also want to read articles on sites like this one and C-Sharp-Corner[^]. tom76 wrote: in C++ I'd use iostream.h for i/o operations, but in C# I do not know what I would use System.IO has many helpful classes for this - File and FileInfo for working with files, Directory for working with directories, Path for working with paths, and FileStream, TextWriter, TextReader, StreamReader, StreamWriter, etc for reading and writing to files. "It is impossible to rightly govern the world without God and the Bible." -- George Washington FLUID UI Toolkit | FloodFill in C# & GDI+ Good .net Html parser (not XML) Andy Brummer26-Nov-03 4:35 Andy Brummer 26-Nov-03 4:35  Does anybody know a good HTML parser written in .net hopefully C#. I'm automating IE right now and I'm looking for something that handles real world HTML with low overhead. Re: Good .net Html parser (not XML) Daniel Turini26-Nov-03 5:37 Daniel Turini 26-Nov-03 5:37  andy brummer wrote: I'm automating IE right now and I'm looking for something that handles real world HTML with low overhead. So, why not use MSHTML.HTMLDocument? With this, you'll use IE's parser engine and you'll have the least overhead possible, as you'll use the very same IE that's in memory. Trying to make bits uncopyable is like trying to make water not wet. -- Bruce Schneier By the way, dog_spawn isn't a nickname - it is my name with an underscore instead of a space. -- dog_spawn Re: Good .net Html parser (not XML) Andy Brummer26-Nov-03 5:52 Andy Brummer 26-Nov-03 5:52  I'm using C# right now and the casting required is driving me crazy. Also, I'd rather not have to do the interop and I don't need the overhead of loading the mshtml parser. Plus this is in a library that could be run server side, and even though I can run with visible false, the objects are still appartment threaded and all that. I just need something simple that will allow me to parse out the tags and attributes with the heirarchy without running embeded script, or requiring XHTML. Re: Good .net Html parser (not XML) Daniel Turini26-Nov-03 5:58 Daniel Turini 26-Nov-03 5:58  andy brummer wrote: I just need something simple that will allow me to parse out the tags and attributes with the heirarchy without running embeded script, or requiring XHTML. I would go for some free Java HTML parser. There are some very good ones out there and it's a breeze compiling most of them with J# and using them from C#. I've done some similar things with PDF libraries in the past and it was very quick and easy. Trying to make bits uncopyable is like trying to make water not wet. -- Bruce Schneier By the way, dog_spawn isn't a nickname - it is my name with an underscore instead of a space. -- dog_spawn Re: Good .net Html parser (not XML) Andy Brummer26-Nov-03 6:05 Andy Brummer 26-Nov-03 6:05  Thanks, there are a ton of those out there. I didn't think of using J# to try compiling them to .net. Re: Good .net Html parser (not XML) Heath Stewart26-Nov-03 8:29 Heath Stewart 26-Nov-03 8:29  If IE is already loaded (which it seems to be by the description in your first post, there is no overhead because you're merely using the interfaces that are defined in the MSHTML typelib, and the interfaces are references to what's already loaded in IE's WebBrowser control (which hosts MSHTML). As far as casting goes, that's just part of development. Besides, .NET allows you to simply cast where in C++ you have to QI (QueryInterface) a pointer for a particular interface, check the return, and AddRef. It's by far more tedious. Feel fortunate!   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- Re: Good .net Html parser (not XML) Andy Brummer26-Nov-03 8:43 Andy Brummer 26-Nov-03 8:43  Well, the only reason I loaded IE is for the parsing , just to get something up and running. Trust me, I've done more then my share of automating IE with C++. I find it more painful to do it in C#, just because everything else is so easy. If I was really going to use IE, I'd drop down to VB.net anyway sad as that may be. Direct Access to the Keyboardbuffer ? Dennis Klein26-Nov-03 4:34 Dennis Klein 26-Nov-03 4:34  Hello, is there any chance to access the keyboard buffer directly using c# ? Thanks, Stux Getting Extention Icon Association List The_Catalyst26-Nov-03 3:39 The_Catalyst 26-Nov-03 3:39  I would like to get a list of images associated with file extentions on a base system to make my application look more proffesional. I will have a list of extentions that I will want for each list view that is activated, and would only require a look up the icons as it is activated (Unless there is a better way of doing this, but i'd like to avoid importing every image in the system). How can I get a list of icons, and their association from the system? Thanks Cata

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