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• Dispatching generic tasks in WCF or .Net Remoting

  - by Eric

  Hello all, I've been researching for a couple days on and off, and have yet to figure out the best way to achieve the following goal. I would like to define either an interface or abstract class in C# which has an associated Run method, similar to the Java runnable interface. The goal would be to have a shared queue which contains a list of these objects. Then individual clients would be able to derive their own concrete runnable classes and add them to the queue hosted by the server. Clients would also be able to pop these runnable objects off the queue and execute them arbitrarily. This seems like it should be feasible in a VM based language without needing to place any of the concrete implementations in a shared assembly, but I have thus far had no luck finding a working example of such a system. Does anyone know how this might be achieved?

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• Check if filename Exists? .NET

  - by acidzombie24

  I find myself doing this a lot just to ensure the filename is not in use. Is there a better way? Directory.Exists(name) || File.Exists(name)

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• .NET dynamic listbox

  - by Mike

  What I wanted to do was create a listbox from a delimited text file. The listbox would populate X # of rows based on the rows of the text file. And the listbox would have 3 columns, each being populated from a specific delimiter. Is this possible in C#? Any starting point would be great!

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• Get a random folder C# .NET

  - by Joshua

  Hi. public sealed static class FolderHelper { public static string GetRandomFolder() { // do work } } But.... How? Like start at c:\ (or whatever the main drive is) and then randomly take routes? Not even sure how to do that.

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• how to remove security settings from a connection string in vb.net

  - by teju

  hi i am trying to add data to the database that was created by some one but when am trying to insert or delete or update the exception is raising and entire project is not working properly and the error i am facing is "A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)" so now what should i do to resolve this error and my connection string is written as Dim CON As New SqlConnection("Integrated Security=SSPI; Persist Security Info=False;Initial Catalog=DIGITALGAMES; Data Source=TEJUS-PC\SQLEXPRESS") is there any problem with my connection string ??

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• Check if fn Exists? .NET

  - by acidzombie24

  I find myself doing this a lot just to ensure the filename is not in use. Is there a better way? Directory.Exists(name) || File.Exists(name)

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• Be notified of method calls in .NET

  - by Alex

  Basically, what I want to do is to be notified whenever a specific method has been called. I was hoping I could accomplish this using Reflection, but my attempts haven't gotten me anywhere yet, so I'm hoping that perhaps somebody else with the same need has accomplished this before and can enlighten me. I figured using MethodInfo was the way to go, but like I said, I found nothing there that could help me accomplish what I wanted to do. Any suggestions, hints or solutions would be greatly appreciated.

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• Finding All Characters Between Parentheses with a .NET Regex

  - by Laritari

  I need to get all characters between '(' and ')' chars. var str = "dfgdgdfg (aaa.bbb) sfd (c) fdsdfg ( ,ddd (eee) )"; In this example, I need to get 3 strings: (aaa.bbb) (c) ( ,ddd (eee) ) What pattern I have to write? Please, help.

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• custom tab controls in vb.net

  - by testkhan

  i want to control my tab pages with custom buttons...now i want to hide my tabs from tab controls...how can i do that...

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• VB.NET: how to prevent user input in a ComboBox

  - by Craig Johnston

  How do you prevent user input in a ComboBox to that only one of the items in the defined list can be selected by the user?

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• .NET regular expression

  - by vert

  How would I write a regular expression (C#) which will check a given string to see if any of its characters are characters OTHER than the following: a-z A-Z Æ æ Å å Ø ø - '

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• Generic SQL builder .NET

  - by Patrick

  I'm looking for a way to write an SQL statement in C# targeting different providers. A typical example of SQL statements differentiating is the LIMIT in PostgreSQL vs. TOP in MSSQL. Is the only way to solve SQL-syntax like the two above to write if-statements depending on which provider the user selects or using try catch statements as flow control (LIMIT didn't work, I'll try TOP instead)? I've seen the LINQ Take method, but I'm wondering if one can do this without LINQ? In other words, does C# have some generic SQL Provider class that I have failed to find that can be used?

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• Update query (access & vb.net)

  - by yae

  Hi: I have to update some fields of a table of access according to the value of parameter. If this paramter is "true" I need to update. Table idInvoice price percentageTax1 tax1 percentageTax2 tax2 total Example values: idinvoice: 12300 price: 100 € percentageTax1: 10 % tax1= 10€ percentageTax2: 5 % tax2: 5€ total: 115 € (result: 100€+10€+5€) Ok. If the parameter on that I have commented before is "true" I must update the percentages and then update the total. I need to replace the "old" percentages by new percent. Ok I can do it in 3 queries: update invocies set percentageTax1=20,tax1=price *(percentageTax1/100) where idInvoice=@number and percentageTax1=10 update invocies set percentageTax2=7,tax2=price *(percentageTax2/100) where idInvoice=@number and percentageTax2=5 update invocies set total=price+tax1+tax2 where idInvoice=@number . But my question is: is there any an alternative to do this in 1 query?

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• Is Google API for .NET (version 2) Redistributable ?

  - by Preeti

  Hi, I made a small product using Google APIs. Now i need to sell it to my client. I made installer and simply added all APIs. But now it is showing error of type COM. How can i resolve this issue?

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• how can i add double slash into path in vb.net

  - by testkhan

  i have a path i.e D:\videos\new\video1.mpg and i want to convert it into D:\videos\new\video1.mpg... to add it in mysql database...how can i do that

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• vb.net master page needs to save data in session after calling pages change

  - by ferrre

  i have 1 master page with 5 dropdownlists on it. The thing is, the master page has href's to aspx pages that use this master page as pagebehind. now lets save i am in page1.aspx with master1.master as pagebehind. If i select couple of dropdownlists, and then click on an href, the whole master page reloads. how do i catch this in session before postback?

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• .NET & Worflow, SqlTrackingQuery.GetWorkflows() on wire correct - presented object not

  - by UKShots

  With windows workflow when using the tracking service, the SqlTrackingQuery.GetWorkflows() method returns correctly the workflow type and assembly version on the wire from the DB query - but when one comes to query the returned SqlTrackingWorkflowInstance object it's WorkflowType.AssemblyQualifiedName property is returned as the current assembly version of the workflow type (i.e. it looks to matching on FQ type name only and not version). Anyone know how to get to the actual returned data (other than either a custom query or hook)?

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• Getting the PublicKeyToken of .Net assemblies

  - by moi_meme

  What is the simplest way to find the Public Key Token of an assembly? The simplest way i can think of would be a simple right-click, get public key, but this fonctionnality isn't there, maybe there is a VS Extension for that.

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• .NET integration Framework

  - by buhtla

  Is there any kind of framework that provides some generic mechanism for integration between applications or something similar? By integration I presume data exchange (import and export) between two applications via some standard interface like Web Service.

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• Count of Distinct Int32 Values in .NET

  - by Eric J.

  I am receiving a stream of unordered Int32 values and need to track the count of distinct values that I receive. My thought is to add the Int32 values into a HashSet<Int32>. Duplicate entries will simply not be added per the behavior of HashSet. Do I understand correctly that set membership is based on GetHashCode() and that the hash code of an Int32 is the number itself? Is there an approach that is either more CPU or more memory efficient? UPDATE The data stream is rather large. Simply using Linq to iterate the stream to get the distinct count is not what I'm after, since that would involve iterating the stream a second time.

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• [Linq & Dictionary (.NET)] A problem with compare item value

  - by Tony

  Hi, I have defined my class: public class Host { public string Name; } then a strobgly-typed dictionary: Dictionary<string, Host> HostsTable; then I try to compare a value: if (HostsTable.Values.Where(s => s.Name == "myhostname") != null) { doSomething } and the problem is, nothing is found, even I'm sure the item is on the list. What I'm doing wrong ?

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• .NET DB Query Without Allocations?

  - by Michael Covelli

  I have been given the task of re-writing some libraries written in C# so that there are no allocations once startup is completed. I just got to one project that does some DB queries over an OdbcConnection every 30 seconds. I've always just used .ExecuteReader() which creates an OdbcDataReader. Is there any pattern (like the SocketAsyncEventArgs socket pattern) that lets you re-use your own OdbcDataReader? Or some other clever way to avoid allocations? I haven't bothered to learn LINQ since all the dbs at work are Oracle based and the last I checked, there was no official Linq To Oracle provider. But if there's a way to do this in Linq, I could use one of the third-party ones.

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• Problem in creating an Inherited Form ( .NET - C# )

  - by John

  I am creating an inherited form and when i click add, it is showing the message as "Do you want to open or save the file". The file is tmp_auto.tmp file. Give me a solution..Thanks.. Also, it shows "Navigation to the webpage was canceled"

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• Problem in creating an Inherited Form ( .NET - C# )

  - by John

  I am creating an inherited form and when i click add, it is showing the message as "Do you want to open or save the file". The file is tmp_auto.tmp file. Give me a solution..Thanks.. Also, it shows "Navigation to the webpage was canceled"

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• Problem in creating an Inherited Form ( .NET - C# )

  - by John

  I am creating an inherited form and when i click add, it is showing the message as "Do you want to open or save the file". The file is tmp_auto.tmp file. Give me a solution..Thanks..

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