What Is The Best .net Alternative To Dde For File Associations
Aug 13, 2009
I have an MDI Windows Forms application (.net 2008) that allows the user to associate various file types with the application. I currently do this with a registry entry something like this, that causes the application to load and access the file name via the command line:[code...]
In the pre-.net version of the application, I used DDE (ddeexec in the registry). If an instance of the application was executing when a file was double-clicked in Windows Explorer, it would open the file without starting up a new instance of the application.
Now that DDE has been deprecated by Microsoft, what is the best way in .net for an executing MDI application to open an additional file when the file is double-clicked in Explorer, as opposed to starting a new instance of the application?
I have a class IContact with various properties some of them being lists of other class objects. I have a public list of IContact. Can I write Contacts as List(Of IContact) to a file as opposed to a bunch of strings I then have to parse? I know visual studio has some data tools in the toolbox and a set of data classes, but I don't know how to use them or if they can help me write all this data to a single file.Second part of the question: I have associated .cms files with my program. But if a user opens the file, what code should the program run through in an attempt to deal with the file? This file is going to contain data that the program needs to read, how do I tell it to read a file when the program is opened vicariously because the file was opened?
I need to clarify these questions, I seem to have poor questions a lot of the time cause I don't get a lot of responses, and when I do get responses, they don't seem to answer my questions, I ask followup questions and then the thread will die after that usually..I seek not answers, but understanding, that I may not solve, but learn. What good is a fish without the skill to catch it?
I know there are allot of toppics about this subject, but i cannot find really what i need.
i need a file associations with settings.. so when you click for an example: "PC0210.config" it will start my program with some settings inside the "PC0210.config" File.
Lets say my program needs to give a message box with the PC name when you click the PC0210.config file.
that inside the PC0210.config file is something like: pcname="testPC"my program popsup with: testPC
How would one go about associating a file type with his application? I know how to read the command line arguments but I am not sure how I can "register" the file extension with Windows. Furthermore, my application is a stand-alone executable, so how would I keep Windows up-to-date on the location of my program?
I did a fair amount of searching and all I could find were old articles that didn't explain everything. How can I create file associations to a stand-alone executable in VB.NET?
Under Project Properties, Publish, Publish Options, File Associations, you can set what file associations your project uses. What should I set for ProgID?
I could find any results on file association. The only one that seemed to be straightforward was for a text file. I'm making a webbrowser. This is the code I was provided for a text file association:
Imports RegistryActions.FileAssociation Public Class HelloForm Private ftHello As New FileType(".Hello", "Hello", "Hello World Adjective File", "C:World.ico")
[code]....
How on earth do I make a file association for an html/htm file?
My name is Stefan and i would like to know how can my app see that it was started up on a file-associated DoubleClick?I know how to associate the files using the "Registry" method and the "Publish" method.
I was created ".cta" file for my project that file was loaded into my Richtextbox control so I created File associations option into registry all was done but I just double click that file in explorer, my application will run but that file was not loaded into my Richtextbox control. How can I do that...
i have 8 new custom file types which go with my app, i can set them to open with me app easily using this code on a button:[code]But im a little stuck on what to change in that, ive made certain all my new extensions are unique and i have all my icons for each new file type made, i just need to be able to set them.
How would that work? I can't find any documentation in the MSDN.you know how when you open a txt file it opens up notepad and loads the file? how does the whole 'loading the file' thing work in VB?
I have my setup and deployment project is set to make the mailto: links refer to my program. It works with Firefox no problem. Internet Explorer complains that "Could not perform this operation because the default mail client is not properly installed." The mailto link shows as being associated to my program in the windows default programs thing.
I've got an app which uses a background worker to copy files. It works fine but some files are quite large and it "appears" as though the app isn't doing anything. Is there an alternative to the File.Copy method of copying files so I can report on the progress of individual file copies, like the percentage complete?
in my database i have an admin form, where it allows you to do admin stuff.Example: Allows you to enter price per membership, and change it.Problem i'm having is how would i save it, since all previous files had more than 1 records, so it would be in the form of:
FilePut(1, OnePerson, NumberOfRecords + 1)
Since this file will only cosist of one record, i don't know how i would save it.i tried FilePut(1, OnePerson, Index) But it doesn't work.
I am currently using the registry to get file descriptions for files. As an example, so that a DOCX file will return the description "Microsoft Word". I am doing this from the HKEY_CLASSES_ROOT registry key.However, registry access is extremely slow, and I need to do several thousands of these. Is there an alternative way to do this?
I have 4k records in access database. And one of the field value contains ~100 lines each so and one other field has ~25 lines. So total database size reaches ~30MB and it takes lot of time 15-20 seconds to load the database in vb.net using odbc [URL]..and updating of any other small fields also takes time due to database being large
So as an alternative I used rtf file (txt files were not preserving all the newline characters). So these file are around 5-10kb only. But for 4k records and 2 fields I have now 8k files. And copying of these 8k rtf files is taking huge time for 5MB transfer it takes an hour or so.So is there any other alternative for storage of this data. So that it will be portable and easily loaded/accessed/updated from vb.net?
I want to have a single table that represents a person and have a number of other tables (such as Student/Teacher) use the Person table to store information related to a person. Unfortunately the entity framework doesn't seem to like it when I try to add an association between the Student or Teacher class and I don't understand why. The Person table contains a column called ParentEntityID, which equals either a StudentEntityID or a TeacherEntityID. In an ideal world I would like to be able to reference the Person table by going Student.Person.FirstName instead of Student.Entity.Person1.FirstName. The error .Net returns when trying to connect the Student/Teacher table to the Person table is:
Error 3007: Problem in Mapping Fragments starting at lines 265, 289: Non-Primary-Key column(s) [ParentEntityID] are being mapped in both fragments to different conceptual side properties - data inconsistency is possible because the corresponding conceptual side properties can be independently modified.
The actual database I am working with is a bit more complicated and has a number of tables connected to the Entity table, which makes my object model pretty ambiguous and was hoping to be able to clean it up a bit by using the entity framework.I am using VB.Net 3.5 in a web application.
Update...In an attempt to internalize the different types of relationships I can form, I have been playing with this simple example and have come up with the following possibilities:And the reason why I cannot make an association between the Student and Address table is because that relationship is not enforced in the database. If I wanted an association between these two tables I would need to re-think the design of my database. Is that correct?
I have been developing an application for quite some time now. I have decided to create an mdi parent form to hold all the windows I have done so far. Is there an easy way to implement the mdi parent/ child associations rather than to go and declare them each one individually.
I've created an app (VB.NET) where each installation of the app works with a single local database on the PC. No multiuser and no ability for the user to change databases - the database is effectively part of the app, with a fixed scema, only the data will change.At the moment the database is SQL CE. It has about 30 tables with some simple relationships between the tables.
I'm wondering if there is an alternative to SQL CE that might be faster in this scenario. Although SQL CE is excellent and easy to use, I get the feeling there is perhaps an unecessary overhead when using it for something simple - and it does seem a little slow when my app is doing complex stuff that interacts a lot with the DB. In my prototype I actually loaded the 'database' tables from text files into Arrays and developed subs and functions to perform the database searches etc. It was blindingly fast but I realised it wasn't a scaleable solution because it was an 'in-memory' database. A compromise would be to 'page' data into array when needed, but it all gets horribly complex and that's probably why some very clver people have created SQL CE !
Using VB.net, I have a namespace which I'd like to rename for the future. However, I'd also like to keep the old obsolete namespace for a time to ensure backward-compatibility for our consumers for awhile. Is there a way in .NET to have two namespaces, one ordinary and one that merely is an alternative name for the other?
Below is the code for a linked list search I have tried to implement in to searching through each of the elements of htmlelements .For some reason If element.InnerText = (item) will only work if if is only a string ("example") .Are there any other ways of Implementing the for each loop to search through my item linked list?
Original code for searching for 1 string
Private Sub block() Dim elements As HtmlElementCollection = webBrowser.document.All Dim word_found As Boolean word_found = False
[CODE]...
This is the Loop for item I have tried to implement but is not working ,because of the for each loop .The value of element.Innertext = "" or null when I try to use one of the linked list item[If element.InnerText = (item)] is used and only have a value when a string is used to [If element.InnerText = (google)]
Private Sub block() Dim elements As HtmlElementCollection = webBrowser.document.All Dim word_found As Boolean word_found = False Dim item As LinkedListItem = words.Head
I've encountered a problem in a application that I inherited. It contains a combo box that loads information.The problem is that there are more data that the control will hold (32767
Is there an alternative to Uri.EscapeDataString? I'm trying to upload an image, by converting it into a base64 string, but I need to use Uri.EscapeDataString on it first, and if the image is big then Uri.EscapeDataString will say that the URI is too long.
My clients web application is using TidyCOM to clean up dynamically created XML files from a SQL database query. With this TidyCOM, they are not able to upgrade the web application to .Net 4.0 framework. Is there an alternative to using TidyCOM so that these dynamically created XML files are validated correctly?
We heard a lot about the vulnerabilities of using QueryStrings and the possible attacks.Aside from that, yesterday, an error irritated me so much that i just decide to stop using QueryStrings, i was passing something like[code]....
My VB application also needs to manage simple appointments in an agenda, however one user has no MSOutlook. Someone knows of an alternative calendar tool, with which I can do this?
So I've been doing a lot of reading today and apparently SendKeys isn't very reliable anymore.Does anyone know of another alternative to it for what I need:
The application works by the form being positioned over a open window, notepad, word, excel etc and it then determines what it is over, notepad, word, excel etc and then reads the file, and does some processing using SendKeys at the moment.Though I do believe I could probably change the later at some point. The problem I'm having right now is when I try to send the Alt + Tab to change focus it's working roughly 12% of the time.If you are wondering I ran it 50 times and it worked 6 of those,thus the 12%.I'm thinking that is rather unacceptable.This is what I'm using which should work: SendKeys.SendWait("%{TAB}")
First off, using VB2010. I'm in the process of upgrading some applications from VB6 to 2010 and haveing a great time of it. The current application I'm working on is using Sendkeys of which I have changed over to the WSH.Sendkeys of which is pretty decent. Basically the program is copy and pasting the current open file, reading some data and saving it as a different file type. It also has to change xls files to csv and then saving it to the format as well as a smiliar thing with word. Thus the reason for the copy and paste as it's changing the extension to a dot date (for example, test.830).This is the flow of how it works for a text file (most basic)
I need a good alternative for System.Web that is included in the .NET 4 Client Profile. Currently all of my frameworks are included in the client profile, except System.Web. What is a good alternative?
