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• Drop a DB2 view if it exists...

  - by grenade

  Why doesn't this work in IBM Data Studio (Eclipse): IF EXISTS (SELECT 1 FROM SYSIBM.SYSVIEWS WHERE NAME = 'MYVIEW' AND CREATOR = 'MYSCHEMA') THEN DROP VIEW MYSCHEMA.MYVIEW; END IF; I have a feeling it has to do with statement terminators (;) but I can't find a syntax that works. Another similar question at http://stackoverflow.com/questions/355687/how-to-check-a-procedure-view-table-exists-or-not-before-dropping-it-in-db2-9-1 suggests that they had to create a proc but this isn't a solution for us.

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• Gmail-like labelling system

  - by Dimitris

  Hi I am looking into a number of ways to implement a labelling system similar to the one in Gmail. Basically I have a Resource at the lowest level and I would like to provide a number of organisational groupings for that resource in the form of labels. If anyone has implemented something like that I would like to hear your views. My idea is to have within the Resource instance a List<Label>. I need to have an efficient mechanism in order to do very fast searches based on the labels or based on the resources. Thanks Dimitris

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• Allow run-time configuration of web service url using ATL soap and sproxy-generated proxy class

  - by Odrade

  I have a Visual C++ application that communicates with an ASP.NET web service via ATL Soap. The client application uses an sproxy-generated proxy class for the communication. Looking at the generated proxy class, I noticed that the url for the web service is hard-coded in numerous places. It would be preferable for the url to be configurable at run-time (e.g. stored in a config file). Could anyone recommend a method for doing this? It doesn't look like the class generated by sproxy is amenable to hand-editing.

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• Difference between Factory Method and Abstract Factory design patterns using C#.Net

  - by nijhawan.saurabh

  First of all I'll just put both these patterns in context and describe their intent as in the GOF book: Factory Method: Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses.   Abstract Factory: Provide an interface for creating families of related or dependent objects without specifying their concrete classes.   Points to note:   Abstract factory pattern adds a layer of abstraction to the factory method pattern. The type of factory is not known to the client at compile time, this information is passed to the client at runtime (How it is passed is again dependent on the system, you may store this information in configuration files and the client can read it on execution). While implementing Abstract factory pattern, the factory classes can have multiple factory methods. In Abstract factory, a factory is capable of creating more than one type of product (Simpilar products are grouped together in a factory)   Sample implementation of factory method pattern   Let's see the class diagram first:                   ProductFactory.cs // ----------------------------------------------------------------------- // <copyright file="ProductFactory.cs" company=""> // TODO: Update copyright text. // </copyright> // -----------------------------------------------------------------------   namespace FactoryMethod {     using System;     using System.Collections.Generic;     using System.Linq;     using System.Text;       /// <summary>     /// TODO: Update summary.     /// </summary>     public abstract class ProductFactory     {         /// <summary>         /// </summary>         /// <returns>         /// </returns>         public abstract Product CreateProductInstance();     } }     ProductAFactory.cs // ----------------------------------------------------------------------- // <copyright file="ProductAFactory.cs" company=""> // TODO: Update copyright text. // </copyright> // -----------------------------------------------------------------------   namespace FactoryMethod {     using System;     using System.Collections.Generic;     using System.Linq;     using System.Text;       /// <summary>     /// TODO: Update summary.     /// </summary>     public class ProductAFactory:ProductFactory     {         public override Product CreateProductInstance()         {             return new ProductA();         }     } }         // ----------------------------------------------------------------------- // <copyright file="ProductBFactory.cs" company=""> // TODO: Update copyright text. // </copyright> // -----------------------------------------------------------------------   namespace FactoryMethod {     using System;     using System.Collections.Generic;     using System.Linq;     using System.Text;       /// <summary>     /// TODO: Update summary.     /// </summary>     public class ProductBFactory:ProductFactory     {         public override Product CreateProductInstance()         {             return new ProductB();           }     } }     // ----------------------------------------------------------------------- // <copyright file="Product.cs" company=""> // TODO: Update copyright text. // </copyright> // -----------------------------------------------------------------------   namespace FactoryMethod {     using System;     using System.Collections.Generic;     using System.Linq;     using System.Text;       /// <summary>     /// TODO: Update summary.     /// </summary>     public abstract class Product     {         public abstract string Name { get; set; }     } }     // ----------------------------------------------------------------------- // <copyright file="ProductA.cs" company=""> // TODO: Update copyright text. // </copyright> // -----------------------------------------------------------------------   namespace FactoryMethod {     using System;     using System.Collections.Generic;     using System.Linq;     using System.Text;       /// <summary>     /// TODO: Update summary.     /// </summary>     public class ProductA:Product     {         public ProductA()         {               Name = "ProductA";         }           public override string Name { get; set; }     } }       // ----------------------------------------------------------------------- // <copyright file="ProductB.cs" company=""> // TODO: Update copyright text. // </copyright> // -----------------------------------------------------------------------   namespace FactoryMethod {     using System;     using System.Collections.Generic;     using System.Linq;     using System.Text;       /// <summary>     /// TODO: Update summary.     /// </summary>     public class ProductB:Product     {          public ProductB()         {               Name = "ProductA";         }         public override string Name { get; set; }     } }     Program.cs using System; using System.Collections.Generic; using System.Linq; using System.Text;   namespace FactoryMethod {     class Program     {         static void Main(string[] args)         {             ProductFactory pf = new ProductAFactory();               Product product = pf.CreateProductInstance();             Console.WriteLine(product.Name);         }     } }       Normal 0 false false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

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• VisualAssert Testing in C++, Loading a test fixture.

  - by C_Bevan

  Good day, I am learning Testing in Visual Studio C++ and I have several tutorials which I have followed. I am trying to load a test fixture. I have tried to put the test .cpp file in many different places but it will still not pick up on it when I click on "Run Tests" or "Run Tests without debugging" In the tutorials I found, they seemed to load into the Test Explorer automatically, but in mine is an icon with a X + (PROJECTNAME).EXE and when I hoover over it I get the process exited without registering with the agent... this is due to the model not containing any test fixtures... How can I load my tests into the Test Explorer...or register them with my project... I've tried right click and "Add Fixture...".... but that just starts a new test file and I have the same problem. Anybody know how I solve this issue?

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• VB.NET equivalent of Timeout.bas Module from VB6

  - by user557889

  Hi all. I am looking for the VB.NET code of a very handy little *.bas file I used to use in Visual Basic 6. The file was called timeout.bas and it was the greatest module ever to me. I want to switch to start using VB.NET finally but this single file is holding me back. Trying to use .NET without it is like crippling me. Can someone, anyone please make this code work in .NET for me? It's only a couple lines: Attribute VB_Name = "Module1" Sub timeout(duration) starttime = Timer Do While Timer - starttime < duration DoEvents Loop End Sub Basically you add that timeout.bas file which contains that code and you can just do: Text1.text = "hello" timeout .5 Text1.text "World!" It's so awesome. Anyone PLEASE re-do it in VB.NET for me! Thanks!

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• Unkillable console windows

  - by rep_movsd

  I'm developing an OpenGL based 2d simulation with GLUT under Visual C++ 2008, sometimes when I have an assert() or unhandled exception and break into the debugger, the GLUT display window closes, but the console window remains open.They just cant be killed!!! They do not show up with Task manager, Process Explorer or any other tool, I cannot find the window handle using the Spy++ tool either. Worst thing is they prevent my system (Windows XP) from shutting down, I have to manually poweroff (and of course I have to run chkdsk on my drives and invariably it finds and fixes minor errors after bad shutdowns) Has anyone come across such an issue?

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• Implementing a Suspension or Penalty System for Users in ASP.NET MVC

  - by Maxim Z.

  I'm writing a site in ASP.NET MVC that will have user accounts. As the site will be oriented towards discussion, I think I need a system for admins to be able to moderate users, just like we have here, on Stack Overflow. I'd like to be able to put a user into a "suspension", so that they are able to log in to the site (at which point they are greeted with a message, such as, "Your account has been suspended until [DATE]"), but are unable to do the functions that users they would normally be able to do. What's the best way of implementing this? I was thinking of creating a "Suspended" role, but the thing is, I have a few different roles for normal users themselves, with different privileges. Have you ever designed a feature like this before? How should I do it? Thanks in advance.

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• using BOSH/similar technique for existing application/system

  - by SnapConfig.com

  We've an existing system which connects to the the back end via http (apache/ssl) and polls the server for new messages, needless to say we have scalability issues. I'm researching on removing this polling and have come across BOSH/XMPP but I'm not sure how we should take the BOSH technique (using long lived http connection). I've seen there are few libraries available but the entire thing seems bloaty since we do not need buddy lists etc and simply want to notify the clients of available messages. The client is written in C/C++ and works across most OS so that is an important factor. The server is in Java. does bosh result in huge number of httpd processes? since it has to keep all the clients connected, what would be the limit on that. we are also planning to move to 64 bit JVM/apache what would be the max limit of clients in that case. any hints?

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• TeamCity with TFS - workspace problems

  - by Tom

  Hi, We have been using CC.NET as our CI server for a month or so now, which has worked ok with TFS. In the config we were able to specify the TFS server, username, password, project and workspace which is all good. Now we are moving over to TeamCity mainly because it just seams more solid and is much nicer to use. The problem is getting it work with TFS. For the purpose of this, both the workspace and machine name are "BuildMachine", username is "BuildUser" TFS project is "$/Project/Dev/Website" I seam to have set it up correctly, I think, as when testing the connection it is successful. When I run a build I get a TFS error: "RunBuildException when running build stage UpdateSourcesFromServer." It goes on to say: "No matched workspaces were found. Will recreate workspace and perofming clean checkout." It then tries to create a new workspace something like this: TeamCity-S-sqa9qe2aulx22gz4rzkogl5kr/BuildUser It tries to set up some mappings and then fails because: "The working folder C:\ is already in use by the workspace BuildMachine;BuildUser on computer BuildMachine". This seams ok as this is the workspace that CC.net was using, and c:\project\dev\website is the path to the project. The problem is, why didn't TeamCity pick this up and use this workspace? Why does it try to create its own new one? Any idea how I can fix this? Thanks

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• privmsg system db schema

  - by Bartek

  I'm making a PM-system on my site. And I want to know ultimate db schema. I have always just used only 1 table. But my users have started complained that the messages in their outbox suddently dissapers =D Thats because if the other users deletes it, the one who sent it wont see it to. So im thinking of making another table with the same fields So im thinking something like this: privmsgs id | to | from | subject | message | date -- -- ---- ------- ------- ---- 1 76 893 blabla. blabla. 20100404 sent_msgs id | to | from | subject | message | date -- -- ---- ------- ------- ---- 1 76 893 blabla. blabla. 20100404 Whatya think? Sorry for my bad english

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• VS2010 patce: why it's take so muce time to install it?

  - by Mendy

  Visual Studio 2010 RC has a few of patches release. For more information about them take a look here. What I'm expect from patch program, is to replace a few dll's of the program to a new fixed version of them. But when I run each of this 3 patches, they take a lot of time (5 minutes each), and you think that the program was frozen because the progress bar stay on the begging. This is question may not be so important, but it really interesting me to know, why this happens? It's really confusing to see that each VS2010 (or Microsoft in general) is frozen to 4-5 minutes.

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• How to implement filter system in SQL?

  - by sadvaw

  Right now I am planning to add a filter system to my site. Examples: (ID=apple, COLOR=red, TASTE=sweet, ORIGIN=US) (ID=mango, COLOR=yellow, TASTE=sweet, ORIGIN=MEXICO) (ID=banana, COLOR=yellow, TASTE=bitter-sweet, ORIGIN=US) so now I am interested in doing the following: SELECT ID FROM thisTable WHERE COLOR='yellow' AND TASTE='SWEET' But my problem is I am doing this for multiple categories in my site, and the columns are NOT consistent. (like if the table is for handphones, then it will be BRAND, 3G-ENABLED, PRICE, COLOR, WAVELENGTH, etc) how could I design a general schema that allows this? Right now I am planning on doing: table(ID, KEY, VALUE) This allows arbitary number of columns, but for the query, I am using SELECT ID FROM table WHERE (KEY=X1 AND VALUE=V1) AND (KEY=X2 AND VALUE=V2), .. which returns an empty set. Can someone recommend a good solution to this? Note that the number of columns WILL change regularly

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• how to create an iphone Application that uses its GPS system

  - by vicky-saini

  Hi I am fairly new to iphone development. Right now, I am working on an iphone game that is being developed in cocos2d. But I want to create an iphone application that uses its GPS system. I searched a lot on net but didn't find much. I want to know about: What framework tou use like cocoa touch or cocos2d,etc? Any linksk that could help me regarding this? Any other relevant and helpful information? Thanks

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• How to Disable the Move System Menu Item?

  - by Andreas Rejbrand

  In Microsoft Windows, this works: mnu := GetSystemMenu(h, false); EnableMenuItem(mnu, SC_CLOSE, MF_BYCOMMAND or MF_GRAYED); But this does not work: mnu := GetSystemMenu(h, false); EnableMenuItem(mnu, SC_MOVE, MF_BYCOMMAND or MF_GRAYED); Hence I know how to disable the "Close" system menu item of a window, but not the "Move" item. How do I do that? Update Of course one alternative to using the very nice function EnableMenuItem, is to use SetMenuItemInfo: FillChar(info, sizeOf(info), 0); with info do begin cbSize := sizeOf(info); fMask := MIIM_STATE; fState := MFS_GRAYED; end; SetMenuItemInfo(mnu, SC_MOVE, false, info); But this again works perfectly for SC_CLOSE, but not at all for SC_MOVE!

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• DragDrop registration did not succeed in Setup Project

  - by rodnower

  Hello, we have some installation project in Visual Studio solution (Other project types - Setup and deployment - Setup project). This project have other library type project with Installation class named InstallationCore like project output. In user action I call to Install and Uninstall functions of installer of InstallationCore. InstallationCore has windows forms for interaction with user. There, in forms, I use Drag and Drop functionality for Drag and Drop text from Tree View to Text Box. But in line: txbUserName.AllowDrop = true; I get error of JIT debugger: Unhandled exception has occured DragDrop registration did not succeed System.InvalidOperationException: DragDrop registration did not succeed And long stack trace after that. Important to say, that when I run Installer function from test project the error did not occur and all work fine. Error occurs only when I run the .msi package. Any suggestions? Thank you for ahead.

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• Force VSProps settings to override project settings

  - by Steve

  I have a vsprops file that defines the optimizations all of our projects should be built with for Visual Studio 2008. If I set the properties for the project to "inherit from parent of project defaults" it works, and fills them in the vcproj file. However, this doesn't protect me from a developer checking in a project file that changes the optimizations. In this case, the project settings are used over the vsprops settings. I need to make it so that vsprops always takes precedence over what is in the vcproj file. Is this possible? Other workarounds are also welcome.

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• Scala type system : basic type mismatch

  - by SiM

  I have a basic type system type mismatch problem: I have a class with a method def Create(nodeItem : NodeItem) = {p_nodeStart.addEndNode(nodeItem)} where p_nodeStart is NodeCache class NodeCache[END_T<:BaseNode] private(node: Node) extends BaseNode { def addEndNode(endNode : END_T) = {this.CACHE_HAS_ENDNODES.Create(endNode)} and the error its giving me is: error: type mismatch; found : nodes.NodeItem required: Nothing def Create(nodeItem : NodeItem) = {p_nodeStart.addEndNode(nodeItem)} while the NodeCache is defined as object NodeTrigger { def Create() { val nodeTimeCache = NodeCache.Create[NodeItem](node) and in object NodeCache object NodeCache { def Create[END_T<:BaseNode]() { val nodeCache = new NodeCache[END_T](node); Any ideas, how to fix the error?

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• Key logging in .NET

  - by Moshe

  Is it possible to write a key logger in Visual Basic.NET? Is this the right language to be using? So far, I've gotten a console app to read input and append to a file. 1)How can I make a .NET program "catch" all keyboard input? 2)How do I make a process not show up in Task Manager? This is not for a virus, but rather a parental control program for a specific clientele. No malicious intent here.

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• GraphicsDevice is null in my XNA Windows Game project

  - by indyK1ng

  Hello All, I have just started trying to make a simple game with XNA 3.1 to help myself learn C# and XNA. I have run into a bit of an interesting problem, however. In all of the tutorials, one is supposed to pass GraphicsDevice when instantiating a new spriteBatch object like this: spriteBatch = new SpriteBatch(GraphicsDevice); One might even do this: GraphicsDevice objGraphics = new graphics.GraphicsDevice; spriteBatch = new SpriteBatch(objGraphics); where graphics is the GraphicsDeviceManager. However, no matter which version I try, I always get an ArgumentNullException when I try to pass the GraphicsDevice object to spriteBatch's constructor. Almost every tutorial I have found gives the first one and only one mentioned the second option. Has anyone else run into a similar error or know what could be causing this? I am working in Windows 7 x64 with Visual Studio 2008.

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• How to update control state in asp.net/ajax?

  - by darth_alexious

  I'm trying to update certain controls according to a selection in a dropdown list. For example, in the "selectedIndexChanged" event of a dropDownList, if a user selects the value "sport-car" the text box "payload" is disabled and the textbox "max speed" is enabled. private sub dropDownList1_SelectedIndexChanged(byval sender as object, byval e as eventargs) handles dropDownList1.SelectedIndexChanged If dropDownList1.selectedValue = "sport-car" then textBox_payLoad.enabled = false textBox_maxSpeed.enabled = true end if end sub When I'm doing something like this, the controls aren't enabled/disabled, even the event (wich I've added a breakpoint) seems not to be raised (sometimes several time after it is raised). Also, when the instructions in the condition is executed, nothing changes. What am I doing wrong? Maybe this is a very easy issue, but I'm a begginer in MS Visual Web Developer.

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• What can explain std::cout not to display anything ?

  - by Benoît

  For whatever reason, std::cout does not display anything with my application. The description of my development environment follows. I am working on a Qt application using Qt Creator. Since Qt Creator can't be launched from my station (XP64), i am currently developping it with Visual Studio 2008 and the Qt plugin (by importing the .pro project file). Everything seems fine and the application works. In some cases (depending on command line arguments), i don't want to launch the HIM, just to display a few sentences in the CLI (command line required arguments, for instance). I don't get any error, but nothing is displayed. The corresponding code, which i am sure is run is the (classical) following : std::cout << "is this going to be displayed ?" << std::endl; Do you have any idea why nothing is displayed ?

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• /SUBSYSTEM:Windows program will not write to command line

  - by user144182

  I have a mixed mode C++-CLI program in Visual Studio 2005 that is set to use the /SUBSYSTEM:Windows. Generally speaking it is a graphical application that is launched from its shortcut or through the filetype registered to it. However, there is a rare occasion where a user will want to run it from the command line with arguments. I can access the arguments just fine, its when it comes to writing to the console, in response to the program being launched from the command line with arguments, where I don't see Console::WriteLine having any effect. What am I doing wrong?

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• Getting "Object is read only" error when setting ClientCredentials in WCF

  - by Paul Mrozowski

  I have a proxy object generated by Visual Studio (client side) named ServerClient. I am attempting to set ClientCredentials.UserName.UserName/Password before opening up a new connection using this code: InstanceContext context = new InstanceContext(this); m_client = new ServerClient(context); m_client.ClientCredentials.UserName.UserName = "Sample"; As soon as the code hits the UserName line it fails with an "Object is read-only" error. I know this can happen if the connection is already open or faulted, but at this point I haven't called context.Open() yet. I have configured the Bindings (which uses netTcpBinding) to use Message as it's security mode, and MessageClientCredentialType is set to UserName. Any ideas?

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• Fully customized login system in Django?

  - by user367817

  Hey, I am currently writing an application which I plan to sell as SaaS. Without giving away "secrets," I can say that it is basically a "document editing system" in which many users will be submitting documents. The basic heirarchy is this: Institution Individual Document Sub-document So each Individual should be able to BROWSE all documents that were submitted by anybody in their institution, but should only be able to EDIT documents that they created. No individual should even be aware of the existence of another Institution--that should all be completely hidden. I have written a Django/Python class that would facilitate this, but every document regarding authentication that I have read requires that I use the User object. Is this just a limitation of Django, or is there a way to do this? If there is a way, how can I get my own "Individual" class details attached to the "request" objects so I can validate the things I should be showing the users?

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