C#

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Re: Clearing the Console Heath Stewart29-Dec-03 5:30 Heath Stewart 29-Dec-03 5:30  This will be possible in either .NET 2.0 or Longhorn (no sure exactly which since release details are still sketchy) with Console.Clear, but for now you have to rely on other ways. One article here on CP presents such a way: http://www.codeproject.com/csharp/winconsole.asp[^]. There's also a programmatic way, but you'll have to P/Invoke some native functions: http://support.microsoft.com/support/kb/articles/q99/2/61.asp[^].   -----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: Clearing the Console Hauptman(n)29-Dec-03 8:51 Hauptman(n) 29-Dec-03 8:51  but with this method, you give up your portability antoher method is, when you fill up the Console with \n (i mean the escape sequence) scio me nihil scire My OpenSource(zlib/libpng License) Engine: http://sourceforge.net/projects/rendertech Re: Clearing the Console Heath Stewart29-Dec-03 9:35 Heath Stewart 29-Dec-03 9:35  Portability is often not possible anyway. Say I write a console app to manage the NICs in the machine - unless I add an abstraction layer, managing information on the NICs / in the OS is platform-dependent. Even with the code I gave, one could always abstract that, too. In any case, your idea works, it just isn't technically clearing the screen (this is most notable when you have a larger command/output buffer for your prompt and scroll).   -----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----- MenuItem.BarBreak -- who was the idiot.... Marc Clifton29-Dec-03 3:28 Marc Clifton 29-Dec-03 3:28  [rant] That decided that a BarBreak creates a horizontal bar on a MainMenu, but a vertical bar on a ContextMenu??? What if I want a horizontal separator on a context menu??? ![/rant] Marc Latest AAL Article My blog Join my forum! Re: MenuItem.BarBreak -- who was the idiot.... leppie29-Dec-03 6:42 leppie 29-Dec-03 6:42  I agree totally! What a load of..... leppie::AllocCPArticle("Zee blog"); Seen on my Campus BBS: Linux is free...coz no-one wants to pay for it. Re: MenuItem.BarBreak -- who was the idiot.... Marc Clifton29-Dec-03 13:09 Marc Clifton 29-Dec-03 13:09  Well, guess what I forgot, that Roger in the post below reminded me of? That the "-" now means "seperator". Marc Latest AAL Article My blog Join my forum! Re: MenuItem.BarBreak -- who was the idiot.... leppie30-Dec-03 6:10 leppie 30-Dec-03 6:10  Marc Clifton wrote: That the "-" now means "seperator". Oops I thought -- is the seprator and it's different from a bar break? leppie::AllocCPArticle("Zee blog"); Seen on my Campus BBS: Linux is free...coz no-one wants to pay for it. Re: MenuItem.BarBreak -- who was the idiot.... Roger Alsing29-Dec-03 9:18 Roger Alsing 29-Dec-03 9:18  ive might have missed the idea of what you are doing but whats wrong with setting the text to "-" on the menu item? (since this always renders a horizontal separator) //Roger Re: MenuItem.BarBreak -- who was the idiot.... Marc Clifton29-Dec-03 13:08 Marc Clifton 29-Dec-03 13:08  Roger J wrote: but whats wrong with setting the text to "-" on the menu item? OK, so who was the idiot that got rid of the Separator concept, so I have to remember stupid tricks like that??? Marc Latest AAL Article My blog Join my forum! making c# programs run everywhere Leon Radley29-Dec-03 1:36 Leon Radley 29-Dec-03 1:36  is it possible to make a program in c# that doesn't require the .net framework installed? I've written a program in c# and visualstudio.net and I want it to work without any trouble on all computers, but when i try to run it on my other computer it says that the .net framework isn't installed.. is it possible to include the framework parts that are needed in the program.. or is the only way to go to rewrite the program in c++? Re: making c# programs run everywhere Jon Newman29-Dec-03 2:28 Jon Newman 29-Dec-03 2:28  Running C# without the framework is like having a steering-wheel without a car attatched....it makes a nice projectile, but won't get you far. You can place the .NET framework inside your setup app, but it does increase the size of it by 20mb. Jonathan 'nonny' Newman blog.nonny.com [^] Re: making c# programs run everywhere Heath Stewart29-Dec-03 5:22 Heath Stewart 29-Dec-03 5:22  C# compiles to IL (like all .NET languages) which is JIT'd and executed by the Runtime which managed the memory, code, bindings, etc., hence being called "managed code". What do you think is managing it? Read this for more details: http://radio.weblogs.com/0105852/stories/2002/04/21/itsTheRuntimeStupid.html[^]. If you want a runtime-independent application, learn C/C++ since every modern (and even most old) OS is built on top of it and already includes the necessary runtimes.   -----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----- Launching Other Applications Melanius28-Dec-03 22:37 Melanius 28-Dec-03 22:37  A very generic question that is. i would like to know how i would go about launching an application with C#. And if it is possible, how could i manage it in simple terms (execute/restart/stop) not, managing it's contents etc. Thanks in advance Re: Launching Other Applications Jon Newman29-Dec-03 2:30 Jon Newman 29-Dec-03 2:30  System.Diagnostics.Process.Start("C:\Windows\Notepad.exe"); Should do the trick. As for controlling the app, you will have too look in the articles on CP, I'm sure we've got some here. Jonathan 'nonny' Newman blog.nonny.com [^] Re: Launching Other Applications Melanius29-Dec-03 4:53 Melanius 29-Dec-03 4:53  Thanks, i already dug some articles out, not exactly what i was looking for but, they'll get me to the point i need. Populating Combo Box on Key Press Event Member 33502228-Dec-03 22:23 Member 335022 28-Dec-03 22:23  i am populating combobox on keypress event of the combobox. when three character are pressed, i get for the text so for written in the combobox and search the text in the database, after searching if results are found, combo-box is clear & populated again using a for loop ( since the result after the database query is an ArrayList). Next i do this combox.DroppedDown=true, Now here comes the problem, the selected text (i.e the characters that are written in the combox box are cleared), i have expilicity set the combo-box text. other problem is when combo box is in dropped down mode, the first element get selected even if i don't want to . please help if any one has solution Re: Populating Combo Box on Key Press Event Heath Stewart29-Dec-03 5:18 Heath Stewart 29-Dec-03 5:18  This is the behavior of the ComboBox common control, which the System.Windows.Forms.ComboBox class wraps. In order to override this sort of functionality, you should read about the ComboBox common control (in the "User Interface Design and Development" section of MSDN, under "Windows Controls") and extend the ComboBox class in .NET in order to override the WndProc method and handle the notification messages yourself. Some of this might be possible using managed events, but not everything always is.   -----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----- Using a database link in a C# program extremeg28-Dec-03 21:49 extremeg 28-Dec-03 21:49  I'm a newbee in C# (barely 3 wks old). The problem is that I have two tables in two different databases running on different machines, I need to join these two tables in a query using a database link. Haven searched my libraries thoroughly. The best I came up with was to write the query in a stored procedure, which I called from the program (this is a very slow solution like you'll probaly guess). The VC#.NET documentation has extensive support for database programming which I have explored...but where is the database link object. Please help needed urgently. ...the mind is not a vessel to be filled but a fire to ignited Re: Using a database link in a C# program Heath Stewart29-Dec-03 5:12 Heath Stewart 29-Dec-03 5:12  There's no such thing as a database link object. There is connection classes like SqlConnection, but unless you plan on joining these results yourself, you can only use one in certain objects like a SqlDataAdapter. There is ways to link databases together in some RDBMS's like SQL Server. You can then use a stored proc or a view to query both databases using a syntax like "database.owner.object". In most cases, leaving this on the server provides faster access and centralized management of the query and the database links. You could then write a view like so: SELECT A.Name, A.Birthday, B.AccountID FROM Table1 A JOIN db2.dbo.Table2 B ON A.ID = B.ID where db2 is a linked database. You can find more information about this in the documentation for your RDBMS like SQL Server. I also suggest you move this to the SQL forum if you continue this way. Otherwise, you'll need two SqlConnection objects and two pairs of SqlCommand and SqlDataReader objects (note, I'm assuming SQL here because many lower-end RDBMS's don't support database linking that would use System.Data.OleDb classes). Then you'll have to read the results and programmatically join these together. This will most likely be much slower and more risky that allowing the database server to do so.   -----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: Using a database link in a C# program extremeg30-Dec-03 21:20 extremeg 30-Dec-03 21:20  Thanks. I have already tried the first approach (joining the tables in a query that resides in a procedure on the server-side)- this turned out to be quite slow anyway. What I need is how to do this using either the OleDb or SqlClient (programmatically). Help still needed. ...the mind is not a vessel to be filled but a fire to ignited Re: Using a database link in a C# program Heath Stewart31-Dec-03 3:40 Heath Stewart 31-Dec-03 3:40  The client-side programmatic way is not going to be easy, and most likely will even be slower (think about it - an RDBMS server is typically beefed up to handle many queries where client machines usually aren't - and they both have to go through roughly the same procedure to join the results; the RDBMS is also better optimized for such operations). The easiest way (and similar to an action plan that an RDBMS would generate) would be to use two SqlDataAdapters (I'll be using classes from the System.Data.SqlClient namespace, but you most likely can do this in the other similar namespaces like System.Data.OleDb) with two different SqlConnections to get a couple of DataSets. Then enumerate the rows in one of them, find rows to join in the other (see DataTable.Select), and put them in a different table (which you can add programmatically - see the documentation on the DataSet class). You could also make a new DataSet to hold both tables - or the cross product, whatever suits your needs. You can search CP and google for examples, but I doubt you're going to find much because an RDBMS on a decent server is going to handle this a lot better than a client.   -----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: Using a database link in a C# program extremeg6-Jan-04 20:59 extremeg 6-Jan-04 20:59  Heath, thanks for being helpful on this. I hope some database programmer out there has the way around this problem. I have a project in which the tables and every other database objects must be created programmatically(including the database link) and then written into two different databases and also queried later within the program. For now I'll just keep trying. Once again THANKS. ...the mind is not a vessel to be filled but a fire to ignited Re: Using a database link in a C# program Heath Stewart6-Jan-04 21:11 Heath Stewart 6-Jan-04 21:11  You're not going to find a magic bullet to solve this. I've already given you the answer. Check my history and profile - I know what I'm talking about. I also do A LOT of development with databases. That's the entire backend - both directly and indirectly using .NET Remoting - for our monstrous application that I designed. Creating a database completely through code is provider-specific. Yes, you can execute CREATE TABLE, CREATE VIEW, etc. commands using a DbCommand class (like OleDbCommand or SqlCommand, etc.) but actually creating the database itself is entirly specific to the database. And there is no such thing as a "database link". If you're talking about joining two databases, this is again specific to the database engine. Instead - through code - you can make multiple connections, execute table, view, procedure, etc. statements on each one and copy data into all of them in a loop or something. There just isn't a pre-canned solution that's going to do this. Actually read the .NET SDK (especially being a newbie - don't guess about code), specifically the System.Data, System.Data.OleDb, and System.Data.SqlClient namespaces. Read the topics about ADO.NET to understand what happens behind the scenes. If that still isn't enough, read about OLE DB prividers and how they provide generic functionality for ADO and ADO.NET, but anything specific to that provider is not always exposed through abstract layers, which ADO and ADO.NET are (they abstract the specific details away from the client code). As I also mentioned before, if you use the MSDE (free download, royalty free if you own the right products like VS.NET) or SQL Server, you can create a "database link" as you call it and perform replication, which is basically what you're describing. This can copy both database objects (like tables, views, etc.) and data from database to database, even across disparate networks.   -----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----- developing applications - MDI and SDI ? jeffreylreed28-Dec-03 21:27 jeffreylreed 28-Dec-03 21:27  I am new to developing applications and I’m trying to figure out the best way to design my application. I have read many books and whitepapers but have been unsuccessful in learning what seams to be a basic design scenario. What I want to do is design my application so that the toolbar and main form are consistently the same but have the body of the application change. An example would be MS Outlook, when switching between Mail, Calendar Contacts, etc… How is this done? I have experimented with MDI and SDI applications but my knowledge of these types is limited. MDI applications seem to be what I want - minus the ability to resize, minimize and close the child window. Can someone provide some insight into this type of application design, possibly direct me to an example? Thanks Re: developing applications - MDI and SDI ? Heath Stewart29-Dec-03 5:03 Heath Stewart 29-Dec-03 5:03  Applications like Outlook are neither MDI or SDI - those terms really only apply to document-type applications. Outlook uses a component-based view where the toolbars are queried on the active components and merged with any standard ones. This is pretty much a classic case of an ActiveX container. You should look into that technology if this is what you want. After all, .NET is supposed to be a natural progression from COM and it does borrow many of the ideas - borrowing such ideas from various COM techniques / applications (even using the interfaces themselves in order to interop with COM components) is pretty common. I did so when developing our app. So, certain actions cause new components to fill some canvas. Upon that happening, information is queried on the component, such as toolbars, menus, etc., and merged with the container application. That container application is also responsible for serializing changes by using a stream or storage object and passing that down the hierarchy of components (this doesn't necessary have to be document-related information - it could also be settings to persist to a file or the registery, or any number of things).   -----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-----

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