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  • Control.Invoke() vs. Control.BeginInvoke()

    - by user590088
    First of all, I would like to apologize for my bad grammar since English is not my native tongue. This is my understanding: Control.Invoke(delegated_method) // Executes on the thread wich the control was created on witch holds its handle ,typically this would be the main thread of a winform application . Control.BeginInvoke(delegated_method // Executes asynchronously on a threadPool Thread . According to MSDN, it says Executes a delegate asynchronously on the thread that the control's underlying handle was created on. My QUESTION : Am I to understand that beginInvoke treats the main thread in this matter as it would the thread pool, and execute the delegated method on the main thread when it "gets a chance" ? Another question which is raised, is it possible to create a control not on the main thread ? if so could someone give me an example?

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  • Tab control in Silverlight 3.0 and Dirty data

    - by Vinayak Bhosale
    We are using tab control in our project. While using this control i came across a few issues like - When the tab control loads, it invokes constructor of all the xaml pages that form the individual tabs. Can this be avoided? Is there any event with tab control that we can use to identify dirty data on the previous tab that i may have visited. I mean can i prevent user from navigating to some other tab before saving the changes on current tab.

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  • Using some kind of version control when working alone and with small projects?

    - by Roflcoptr
    Very often I'm working on small projects only for myself. I'm working on one machine, but recently I thought about using some kind of version control nevertheless. This would have some benefits as for example: I don't have to care anymore for local backup Mistakes can easily made undone History can be maintained But on the other hand it has also some drawbacks like for example: Additional resources required Time to setup, get used to it, etc. From your experience, is it a good thing to use revision control when your working alone?

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  • Is it dangerous for me to give some of my Model classes Control-like methods?

    - by Pureferret
    In my personal project I have tried to stick to MVC, but I've also been made aware that sticking to MVC too tightly can be a bad thing as it makes writing awkward and forces the flow of the program in odd ways (i.e. some simple functions can be performed by something that normally wouldn't, and avoid MVC related overheads). So I'm beginning to feel justified in this compromise: I have some 'manager programs' that 'own' data and have some way to manipulate it, as such I think they'd count as both part of the model, and part of the control, and to me this feels more natural than keepingthem separate. For instance: One of my Managers is the PlayerCharacterManager that has these methods: void buySkill(PlayerCharacter playerCharacter, Skill skill); void changeName(); void changeRole(); void restatCharacter(); void addCharacterToGame(); void createNewCharacter(); PlayerCharacter getPlayerCharacter(); List<PlayerCharacter> getPlayersCharacter(Player player); List<PlayerCharacter> getAllCharacters(); I hope the mothod names are transparent enough that they don't all need explaining. I've called it a manager because it will help manage all of the PlayerCharacter 'model' objects the code creates, and create and keep a map of these. I may also get it to store other information in the future. I plan to have another two similar classes for this sort of control, but I will orchestrate when and how this happens, and what to do with the returned data via a pure controller class. This splitting up control between informed managers and the controller, as opposed to operating just through a controller seems like it will simplify my code and make it flow more. My question is, is this a dangerous choice, in terms of making the code harder to follow/test/fix? Is this somethign established as good or bad or neutral? I oculdn't find anything similar except the idea of Actors but that's not quite why I'm trying to do. Edit: Perhaps an example is needed; I'm using the Controller to update the view and access the data, so when I click the 'Add new character to a player button' it'll call methods in the controller that then go and tell the PlayerCharacterManager class to create a new character instance, it'll call the PlayerManager class to add that new character to the player-character map, and then it'll add this information to the database, and tell the view to update any GUIs effected. That is the sort of 'control sequence' I'm hoping to create with these manager classes.

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  • Launch User Control in a tab control dynamically

    - by Redburn
    I have a custom built menu system in which I would like to load user controls from another project into a tab control on my main project (menu control) User control Project : foobar Menu system Project : Menu The function to load them into the tab control: private void LaunchWPFApplication(string header, string pPath) { // Header - What loads in the tabs header portion. // pPath - Page where to send the user //Create a new browser tab object BrowserTab bt = tabMain.SelectedItem as BrowserTab; bt = new BrowserTab(); bt.txtHeader.Text = header; bt.myParent = BrowserTabs; //Load in the path try { Type formType = Type.GetType(pPath, true); bt.Content = (UserControl)Activator.CreateInstance(formType); } catch { MessageBox.Show("The specified user control : " + pPath + " cannot be found"); } //Add the browser tab and then focus BrowserTabs.Add(bt); bt.IsSelected = true; } And what I send to the function as an example: LaunchWPFApplication("Calculater", "foobar.AppCalculater"); But every time run, the application complains that the formType is null. I am confused on how to load the user control and curious if I'm sending the correct parameters.

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  • should I include VB macros in source control with my project?

    - by Sarah Vessels
    For a C# project, I make use of several Visual Basic macros in Visual Studio. I was just considering that these would be of use to other developers that work on the C# project. The macros so far include removing trailing whitespace on save, organizing using directives and removing unnecessary ones, and an override for Ctrl-M Ctrl-O that expands regions. Would it be reasonable for me to include this macro code with my C# project in Subversion? I don't know if it's even possible for macros to be made available/work in Visual Studio just because you open a particular Solution file, and that might be too invasive since some of the macros override existing VS behavior.

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  • .NET invoking against an arbitrary control.

    - by kerkeslager
    I have a method which takes in a .NET control and calls invoke against it like so: Form.Invoke(Target); However, I've run into an issue numerous times calling this method where due to timing or whatever, the form handle on the form doesn't exist, causing a Invoke or BeginInvoke cannot be called on a control until the window handle has been created error. In frustration, I jokingly changed the code to: MainForm.Invoke(Target); where MainForm is the main window of the application (the form handle for the main form is created at startup and remains active for the entire life cycle of the application). I ran all the tests and manually tested the application and everything seems to work fine despite the fact that this is used everywhere. So my question is, what exactly is the meaning of invoking against a specific control? Is there any downside to just always invoking against a control you know will be active? If not, why does .NET have you invoke against a control in the first place (instead of just creating a static GuiThread.InvokeOnGuiThread(Blah);)?

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  • More than one Custome control are not working properly

    - by Kamlesh
    Hello Developers, I have developed a ASP.Net Server custom control in C# for 3.5. named "myCheckBoxList" inherited from CheckBoxList web control. Working is very simple. It just works as a two option buttons. I have taken a CheckBoxList which will show two fixed checkboxes always. When I check one checkbox then another will uncheck as vise versa. This control works perfectly only when I have placed only one instance of that control on web page. If I place more than one instance of control then it doesnt works. Please, I need solution from expert minds from developers as stackoverflow users.

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  • Blank Icon in Control Panel?

    - by Wesley
    Hi all, Just recently I opened my Control Panel and saw that a blank icon came up before my list of icons. Has anyone else experienced this before? Would it be safe to delete it? Thanks in advance. EDIT: Oops, I should have mentioned this too, but when I try creating a shortcut on the desktop, I get a dialog box saying "Windows could not create the shortcut. Check if the disk is full." Clearly it isn't, since I still have 102 GB of free hard disk space... any ideas? EDIT2: Here is a screenie of my complete Control Panel: EDIT3: *So I did a manual search for .CPL in Windows Search and then looked at the list in TweakUI and got 3 unmatched .CPL files. They are [ncpa.CPL], [sapi.CPL], and [QuickTime.CPL]. I clearly know the QuickTime one, but not too sure about the rest. SCRATCH THAT, I FIGURED IT OUT... BUT IT'S NOT THE BLANK ICON.

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  • Looking for Remote Control that works with everything (even Windows 7 Media Center)

    - by T Reddy
    Using my Google-Fu, it seems that the most basic of things one gets with any DVR is the remote control. Had I known it would be difficult just to get a consumer IR receiver for Windows 7 I may not have bothered to build an HTPC. But too late, I already have the HTPC ready to go (minus the CETON card...) So I'm moving away from TiVo, I hate paying the monthly fees and my box is ancient. I'm looking for these solutions to my HTCP setup...I want to: Switch audio from HDMI to SPDIF via the remote control (i.e., switch from TV to Receiver) (as a side note, the built-in audio on the mobo has software to do this). Pressing the volume button on the remote will always change the TV's volume (or the Receiver's if possible) and NOT the PC's volume. The remote/receiver works well around 25 feet. Bonus if the IR Receiver can work with my existing TiVo remote (or other remotes laying around the house) I read a review of the Bluetooth TiVo remote...it sounds promising...but I'm not sure if it is great for Windows 7 HTPC?

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  • Teamviewer: cannot control monitor 1, but can control monitor 2

    - by DaveT
    I'm using the web client of Teamviewer from my work computer trying to control my home computer. I have 2 monitors on the remote desktop, but for some reason only have control on the second monitor. When I switch to the main monitor (monitor 1), I cannot do anything and cannot even move the cursor. But I have no issues when I switch over to the second monitor (monitor 2). I used to have no issues with either, but in the past couple of months this has been causing me issues. Anyone have a suggestion? Thanks!! Also... Here is the log from the Teamviewer session. Showing me switching back and forth between the monitors. (just in case this will help). I had to remove the links in order to post the log since I don't have enough reputation points, but they were just teamviewer login weblinks. =============================================================================== 21.08 16:00:41,176: Version: 9.0.15099 21.08 16:00:41,177: Sandbox: remote 21.08 16:00:41,177: SysLanguage: en 21.08 16:00:41,177: VarLanguage: en 21.08 16:00:41,177: Flash Player: PlugIn (WIN 14,0,0,179) 21.08 16:00:41,178: UseLanguage: en 21.08 16:00:41,178: UseLanguage: en 21.08 16:00:41,182: TeamViewer hasPassword: true 21.08 16:00:41,418: ExternalConnect id=910035824 21.08 16:00:41,419: CT connect 910035824 masterURL: , sandbox = remote 21.08 16:00:41,425: MC.requestRoute(910035824) 21.08 16:00:41,426: MC.sendMasterCommand text=F=RequestRoute2&ID1=777&Client=TV& ID2=910035824&SA_AccountID=26641022&SA_PasswordMD5HashBase64Encoded=& SA_SessionSecret=f7H6Z7SYfX5ahQ7SJq/r/K20PBYg9fOZhp+DKLhf5ts=&SA_SessionID=1558929948& V=9.0.15099&OS=Flash 21.08 16:00:41,426: MC wait for ping completion 21.08 16:00:42,064: PS.socket event: [Event type="connect" bubbles=false cancelable=false eventPhase=2] 21.08 16:00:42,182: PingThread: TCP-Ping ok 21.08 16:00:42,183: MC.socket mode = TCP, MasterURL: 21.08 16:00:42,183: MC.connect: 21.08 16:00:43,058: PS.socket event: [Event type="connect" bubbles=false cancelable=false eventPhase=2] 21.08 16:00:43,058: MC.connectHandler: [Event type="connect" bubbles=false cancelable=false eventPhase=2] 21.08 16:00:43,236: MC.requestRouteResponse: [email protected]_10800_128000_762319420_910035824_10000__1_0_16778176_128000_16778176: 128000;2147483647:1280000;4:640000_786297_786297 21.08 16:00:43,239: CT init socket: TCP 21.08 16:00:43,513: PS.socket event: [Event type="connect" bubbles=false cancelable=false eventPhase=2] 21.08 16:00:43,514: CT.connectHandler: [Event type="connect" bubbles=false cancelable=false eventPhase=2] 21.08 16:00:43,519: Browser name: Netscape 21.08 16:00:43,936: CMD_IDENTIFY id=910035824 ver=2.41 21.08 16:00:44,666: CMD_CONFIRMENCRYPTION: encryption confirmed 21.08 16:00:44,667: Started resendrequest timer 21.08 16:00:45,063: Remote Version: TV 009.000 21.08 16:00:45,501: start classic authentication 21.08 16:00:45,502: Login::SendRequestToConsole(): url= 21.08 16:00:45,828: start srp authentication 21.08 16:00:46,983: checkFirstPacket ok, m_LastReceivedPacketID =4 21.08 16:00:47,148: Login::SendRequestToConsole(): url= 21.08 16:00:47,478: start srp authentication 21.08 16:00:48,210: Login::SendRequestToConsole(): url= 21.08 16:00:48,485: checkFirstPacket ok, m_LastReceivedPacketID =7 21.08 16:00:48,780: TVCmdAuthenticate_Authenticated: 1 21.08 16:00:49,321: Connected to 910035824, name=NEWMAN, os=14, version=9.0.31064 21.08 16:00:49,329: ConnectionAccessSettings: RemoteControl: AllowedFileTransfer: AllowedControlRemoteTV: AllowedSwitchSides: DeniedAllowDisableRemoteInput: AllowedAllowVPN: AllowedAllowPartnerViewDesktop: Allowed 21.08 16:00:52,195: unexpected TVCommand.CommandType == 56 21.08 16:00:52,231: CW received display params: 1680x1050x8 monitors: 2 (active:0) 21.08 16:00:52,301: Caching active, version=2 21.08 16:03:47,158: CW received display params: 1680x1050x8 monitors: 2 (active:1) 21.08 16:04:24,447: CW received display params: 1680x1050x8 monitors: 2 (active:0) 21.08 16:04:40,609: CW received display params: 3360x1050x8 monitors: 2 (active:-1) 21.08 16:04:59,802: CW received display params: 1680x1050x8 monitors: 2 (active:1) 21.08 16:04:59,933: CW received display params: 1680x1050x8 monitors: 2 (active:1) 21.08 16:05:58,419: CW received display params: 1680x1050x8 monitors: 2 (active:0) 21.08 16:06:36,824: CW received display params: 1680x1050x8 monitors: 2 (active:1) 21.08 16:07:07,232: CW received display params: 1680x1050x8 monitors: 2 (active:0)

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  • How can I sort Windows 7 control panel by columns, not rows

    - by user26453
    As best as I can tell the behavior of Windows 7's control panel is as follows: When Large Icons or Small Icons display modes are used, the icons are sorted alphabetically. However they are ordered by row: a b c d e f g h as opposed to what I usually expect in any file browser: a d g b e h c f Why is this the one part of Windows 7 that behaves this way and is there any way to change this behavior?

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  • Physical Access Control using Active Directory ?

    - by Kedare
    Hello, I would like to know if there is a way to use Active Directory for Physical Access Control ? Example: All users will have a RFID card or a fingerprint entry registered on the domain (linked to the user name), and I would like to secure the buildings (doorlock, airlock) using this and controlled by Active Directory (ex: authorizing a group to use some doors, disabling the user will make the RFID/Fingerprint ineffective, access logging) Is this possible ? Thank you

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  • Biometric access control for time-reporting system

    - by dam
    I made a simple REST application to control the presence of workers. Now I'm looking for an inexpensive (100-250$) hardware, possibly linux based, with a fingerprint reader from which I can perform the user authentication and interact with the application (both the activities) via REST. I saw hundreds of different devices on internet which are supposed to do these activities but there are no good datasheets for them and it's very difficult to understand what's possible to do with those devices. Do you have any suggestions for me? Thanks

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  • Control Panel Win 7 ??????

    - by kiiboodo-oni
    Everytime i try to make a Shortcut folder for Control Panel it comes up empty, I'm using ::{26EE0668-A00A-44D7-9371-BEB064C98683}\0 as the path. Is there an actual folder with shortcuts that i can use? BTW im running Win7 7600

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  • Version control with no server installation

    - by Francisco Garcia
    I have ssh access to many servers where I have no root privileges. Do you know of any version control utility that can work with remote ssh repositories whichout installing anything on the remote server? I have tried a bare git repository folder, but it seems to demand some script/binary/installation on the server. I also dont like git because it is not very portable. The portable versions are made of too many files

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  • TortoiseSVN: how to set up projects on a existing directory structure of source code

    - by Steve
    I have an old pet project I want to revive (haven't had enough time for it last year - small kid - you know) - so restored old copy of my dev folder from archive, but since I have rebuilt my machine since when - I can't remember what needs to be done now. I installed the latest version of TortoiseSVN, and the existing directory structure from my old dev machine looks like: ProjectName *SubProject1 **branches ***1.1 ***1.2 **tags **trunk *SubProject2 **branches **1.0.3 **1.0.4 **1.0.5 **tags **trunk I tried "import project" but it ask for a url - don't know what to specify there ... can someone post a url to a good TortSVN tutorial - so I could set up my projects quickly (I guess I need to setup SubProject1 and SubProject2) - then I install AnkhSVN for VS2008 and will spend this Sunday coding like crazy while I still have some time ;-)

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  • Tree View Control problem with render Control function

    - by vikas
    I am using TreeView Control in Asp.net. I have placed this control inside a panel. The tree control is completely binded (we don’t want populate on demand) with an Xmldatasource during a callback and then I call Panel.renderControl to return the response (HTML) to the client side callback handler. Problem: 1. The tree expand/collapse (on click of plus sign) is causing postback whereas when I normally bind a tree with xml during postback and without using renderControl of container control, the expand/collapse (on click of plus sign) is being handled at client side.

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  • Adding Control to Container Control that is in User Control - How to properly initialize?

    - by DougJones
    Let's say I have a user control MyUserControl, which has a container control (it's a server control, but it could just be a Panel) and a dropdownlist. The dropdownlist is not in the container control initially. In it's code-behind, I am overriding OnInit and creating the user control, which includes populating a dropdownlist and adding that dropdownlist to my container control. I have a public property Year, which is an int. Based on the value of Year, I want to populate the dropdownlist. The problem is that in OnInit, year is always 0. On the page Init, I am setting year, but that doesn't run until AFTER the control's Init runs. If I try to set the value on PreInit on the page, the page hasn't initialized the control and I get invalid null reference when setting a value to the control. My question is: How can I properly initialize the control? How can I set the value on the page, before the control actually gets initialized? If I move the control's code to OnLoad, it'll work until I have to do a postback. In this case I need to, though!

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  • User control or custom control for this design?

    - by m0s
    If I want to create a button control like that, is it supposed to be a User Control or a Custom Control? I am not sure maybe something else? Ideally I want to be able style/animate the main button and the inner button separately; also obviously Ill need to process their events separately. These buttons will be created at run-time and Ill need to set the icons dynamically.

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  • How can I declare and initialize an array of pointers to a structure in C?

    - by worlds-apart89
    I have a small assignment in C. I am trying to create an array of pointers to a structure. My question is how can I initialize each pointer to NULL? Also, after I allocate memory for a member of the array, I can not assign values to the structure to which the array element points. #include <stdio.h> #include <stdlib.h> typedef struct list_node list_node_t; struct list_node { char *key; int value; list_node_t *next; }; int main() { list_node_t *ptr = (list_node_t*) malloc(sizeof(list_node_t)); ptr->key = "Hello There"; ptr->value = 1; ptr->next = NULL; // Above works fine // Below is erroneous list_node_t **array[10] = {NULL}; *array[0] = (list_node_t*) malloc(sizeof(list_node_t)); array[0]->key = "Hello world!"; //request for member ‘key’ in something not a structure or union array[0]->value = 22; //request for member ‘value’ in something not a structure or union array[0]->next = NULL; //request for member ‘next’ in something not a structure or union // Do something with the data at hand // Deallocate memory using function free return 0; }

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  • Setting value in html control in code behind without making server control

    - by Muhammad Akhtar
    Setting value in html control in code behind without making server control <input type="text" name="txt" /> <%--Pleas note I don't want put runat=server here to get the control in code behind--%> <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" /> Code behind protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { //If I want to initlize some value in input, how can I set here } } protected void Button1_Click(object sender, EventArgs e) { Request["txt"] // Here I am getting the value of input } Thanks

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