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What it has to do with the question is that you can bind a ObservableCollection<BindingWithCustomColumns<T>> as the ItemsCollection of a ListView and it should act like an ObservableCollection<T> except that you can also add extra columns. Though thinking about it some more you probably want to make the dictionary static if you want the same extra columns for every instance of T ... not sure what the data binding does if the list of things it's binding to claims to have different properties.
(Note that my solution is done by analogy with something similar I did to bind a WinForms DataGridView with dynamic column binding. I wasn't aware that you could explicitly bind the columns as your post seems to indicate.)
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Ah, your solution is for a WinForms DataGridView  . A WPF ListView is a *completely* different animal. ListView.ItemsSource would point to an ObservableCollection<SomeClass>, but columns are defined in a *completely* different place. Also, when you define the columns, you need to define what member of SomeClass will be shown for each column. The WPF ListView column collection doesn't support binding out of the box as I indicated in my other post. You have to do some work to get that to work. In WPF you generally need to tell the control what property to display. Another note is that WPF XAML does NOT play nice with generics. You should generally avoid using them for objects that are going to be displayed. Well, I don't mean don't use them, but I mean, you need to do something like:
public SomeClassCollection : ObservableCollection<SomeClass>
{
}
and then use SomeClassCollection everywhere since you can't specify ObservableCollection<SomeClass> in XAML.
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Oh right you have that whole ItemTemplate business. I remember now.
So yeah treat my post as an interesting diversion and do what this guy says :p
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Trust me... once you pick up MVVM & WPF, you'll wonder why you ever wasted your youth on MFC and WinForms .
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I dodged MFC (thankfully) but I actually quite like the WinForms approach. I don't really see the point in WPF – it's a great way of producing slightly confusing applications that violate the normal conventions of desktop apps, and its layout engine is brilliant at producing something which is nearly but not quite what you want. Silverlight makes more sense, as that approach to UI is more in line with the way the web works.
I do like the MVVM pattern, it seems to be one of the cleanest 'MV*' approaches for separation of concerns – but there's no reason one shouldn't write WinForms or even web code in a similar style (and in fact ASP 4.0 seems to have gone down that road with its MVC).
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Huh? How can you like Silverlight, but not like WPF? They are the same thing! Silverlight is a stripped down version of WPF. Winforms is pretty much MFC with primitive data binding support. Not quite sure what you find confusing about WPF. The layout engine always gives me exactly what I want as its a million times more powerful and flexible then the Winforms one. Oh well... too each his own I guess.
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I like Silverlight and not WPF because the types of UI you produce fit quite nicely into the Web 2.0 paradigm, but generally not into what is expected from a desktop app. It's quite difficult in WPF to produce something that looks like a standard Windows app (right?). I'm sure there's some unfamiliarity as well but it just seems more suited to the web to me.
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? Out of the box, WPF will produce apps that look exactly like Winforms apps. Its just, remember all that crazy code you wrote to do Owner Draw & Custom Draw controls? SetPixel, GetPixel, BitBlt, etc? In WPF that 1000 lines of code is now 2 lines of XAML pretty much. WPF is pretty much Winforms + superior data binding + superior custom drawing support.
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Modifying controls in WPF requires you to replace the XAML template, doesn't it?
Maybe it's just that all the material on WPF focuses on the 'cool stuff' and not making normal apps. Even Microsoft's introductory topic[^] is 'shiny' and web-like in the interfaces it shows, though.
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I had the feeling that BobJanova's answer was not very related, hence the 'investigating....'
I didn't even notice we have a special WPF section. Guess I have been posting in the wrong section.
Thanks again for all the input!
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Hi Team,
Is it possible to remove WATERMARKS from existing PDF.? using C#.?
thanks
Satish
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Yes, but only by accessing the raw data of the file and re-writing it to a new one. However, something tells me this may not be legal so I will not suggest a solution.
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Hi Hari,
Thanks for the quick reply.
I dont have the ORIGINAL source... i.e Option A [Best] - approach.
I have tried using ASPOSE.PDf,PDFTRON etc. which supports to delete the water marks if they added using those Components.
But My requirement is to remove the WaterMARK(added by Thrid party tool..) from PDF.?
thanks
Satish
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A third party tool is putting the watermarks in??
This is usually because you're using an evaluation version of the tool. A fully-paid and licensed version of the tool probably won't do this.
I doubt anyone is going to help you with this unless you can convince people that what you're doing is not stealing someones hard work when they created that PFD tool.
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What you need to do is
- parse the PDF drawing stream
- determine what part of it is creating the watermark
- remove it
- rewrite the PDF drawing stream
- fix up the PDF xref table
Any decent watermark will make part 2 hard, probably mixing the drawing in with some state setup so if you just remove it wholesale it messes up the drawing on the rest of the page. If the PDF is encrypted then getting to the drawing objects might itself be hard (not sure how PDF encryption works though – if readers can read them then they can't be inaccessible).
Unless you can explain why you want to do this (and the result is morally non-objectionable) I won't help any further than that.
Ed: the most effective way is to buy a licence for the software you're using to create the PDFs 
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I have a file explorer feature for a windows application.
I need to show the computer drives that are only permitted to user. By using driveinfo we get all logicaldrives,but how to check whether which drive is permitted for user ?
When i run this application in Windows server 2008 i should be able to view only the permitted drives in fileexplorer.
Using System.Security.Principal.WindowsIdentity.GetCurrent() i can get the current loggedin user.
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Considering all drives are always visible to every user by default, your request doesn't make much sense.
If policies are preventing a user from seeing a drive, the code that enumerates drives won't show the letters that the user cannot see anyway, without you having to check permissions.
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Hi guys,
I'm trying to develop a PDF417 Barcode generator software. The problem is, the software is very hard to develop. I've surveyed and found some SDK which will help on generating barcode, but then those SDKs were demo or trial editions. It will expire in some time.
Can anyone help me let know where I can find free SDK for PDF417 Barcode generator.
It must be able to generate the output as an image file.
I've also tried for third party free barcode generating software, but then its unable to generate the barcode with lots of data in it, even if it do, the barcode generated was very big and couldn't fit on the product itself..
thanks.
Regards,
Machan
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Lots of possibilities here[^], to either learn how to generate your own, or buy a ready made package. If you don't find a free one then it looks like you will have to build your own.
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I would like to know the best way of handling exception and logging ..
Please advise
thanks in advance..
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arun_pk wrote: handling exception
Try.....Catch blocks
arun_pk wrote: logging
Write your own logging class to write out to a text file or integrate with the Windows Event Log using System.Diagnostics.EventLog
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arun_pk wrote: the best way of handling exception
Depends on business requirements and application.
However there is unlikely to be a single answer to that even within a single application.
arun_pk wrote: know the best way of ... logging
Depends on business requirements an application. And can also depend on your definition of "logging" as well.
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