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  • what is the difference between static class and normal class?

    - by Phsika
    when i prefer static or normal class? Or what is the difference between them? using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace staticmethodlar { class Program { static void Main(string[] args) { SinifA.method1(); } } static class SinifA { public static void method1() { Console.WriteLine("Deneme1"); } } public static class SinifB { public static void method2() { Console.WriteLine("Deneme2"); } } public class sinifC { public void method3() { Console.WriteLine("Deneme3"); } } public class sinifD : sinifC { void method4() { Console.WriteLine("Deneme4"); } sinifC sinifc = new sinifC(); // i need to use it:) } }

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  • C/C++ detect network type

    - by Gavimoss
    I need to write a win32 c/c++ application which will be able to determine whether the PC it's running on is connected to one of 2 networks. The first network is the company LAN (which has no internet connection) and the second network is a standalone switch with a single PC connected to it (the PC that the program is running on). I'm pretty new to network programming but so far I have tried testing to see if a network drive which is held on our LAN can be mapped. This works fine if the PC is connected to the LAN, the drive mapping succeeds so so LAN detection is successful. However, if the PC is connected to the switch, this results in a VERY long timeout which is not a suitable as it will delay the program so much as to make it unusable. Does anyone have any alternative suggestions? I'm using c/c++ in VS 6.0

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  • Load Empty Database table

    - by john White
    I am using SQLexpress and VS2008. I have a DB with a table named "A", which has an IdentitySpecification column named ID. The ID is auto-incremented. Even if the row is deleted, the ID still increases. After several data manipulation, the current ID has reached 15, for example. When I run the application if there's at least 1 row: if I add a new row, the new ID is 16. Everything is fine. If the table is empty (no row): if I add a new row, the new ID is 0, which is an error (I think). And further data manipulation (eg. delete or update) will result in an unhandled exception. Has anyone encountered this? PS. In my table definition, the ID has been selected as follow: Identity Increment = 1; Identity Seed =1; The DB load code is: dataSet = gcnew DataSet(); dataAdapter->Fill(dataSet,"A"); dataTable=dataSet->Tables["A"]; dbConnection->Open(); The Update button method dataAdapter->Update(dataSet,"tblInFlow"); dataSet->AcceptChanges(); dataTable=dataSet->Tables["tblInFlow"]; dataGrid->DataSource=dataTable; If I press Update: if there's at least a row: the datagrid view updates and shows the table correctly. if there's nothing in the table (no data row), the Add method will add a new row, but from ID 0. If I close the program and restart it again: the ID would be 16, which is correct. This is the add method row=dataTable->NewRow(); row["column1"]="something"; dataTable->Rows->Add(row); dataAdapter->Update(dataSet,"A"); dataSet->AcceptChanges(); dataTable=dataSet->Tables["A"];

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  • Is it a Microsoft issue?

    - by Yigang Wu
    I have a exe was complied by VC6 and the file name is patch.exe, there is no manifest was added, in that case, the EXE file requires administrator privileges, even though I removed all codes, just keep a empty main(), the result is same. But if I change the EXE from patch.exe to a.exe, the issue is gone. Below is my test result. 1. EXE was complied by VC6 2. Without manifest or didn't specific privileges in manifest 3. the exe name included "patch" substring, case-insensitive Is it a Microsoft issue? Why? Tried VC2008, I can't repeat it.

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  • Risky Business with LINQ to SQL and OR Designer?

    - by Toadmyster
    I have two tables with a one to many relationship in SQL 2008. The first table (BBD) PK | BBDataID | int       | Floor_Qty | tinyint       | Construct_Year | char(4)       | etc, etc describes the data common to all buildings and the second (BBDCerts) PK | BBDCertsID | int       | BBDataID | int       | Certification_Type | varchar(20)       | etc, etc is a collection of certifications for a particular building. Thus, the primary key in BBD (BBDataID) is mapped to the corresponding field in BBDCerts via an FK relationship, but BBDCertsID is the second table's primary key and BBDataID is not because it will not be unique. My problem is that I want to be able to use the OR generated data context to get at the list of certs when I access a particular record in the BBD table. For instance: Dim vals = (From q in db.BBD Where q.BBDataID = x Select q.Floor_Qty, q.Construct_Year, q.BBDCerts).SingleOrDefault and later be able to access a particular certification like this: vals.BBDCerts.Certification_Type.First Now, the automatic associations created when the SQL tables are dropped on the design surface don't generate the EntityRef associations that are needed to access the other table using the dot notation. So, I have to use the OR designer to make the BBDCerts BBDataID a primary key (this doesn't affect the actual database), and then manually change the association properties to the appropriate OneToMany settings. There might be a better way to approach this solution but my question is, is the way I've done it safe? I've done a barrage of tests and the correct cert is referenced or updated every time. Frankly, the whole thing makes me nervous.

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  • Button redirect error

    - by Bader
    I am trying to a redirect the user when they click on a specific button protected void Button1_Click(object sender, EventArgs e) { Server.Transfer("ControlPanel/Default.aspx"); } The problem is when I click Button1 it redirects me to another page localhost:57988/WebSite5/Default.aspx and the weirdest thing is it open another page with this link above, not the default page I have, but another but with the default.aspx page url that you see! Any suggestions?

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  • GridView CheckBox Disable

    - by zxc
    I have a gridview populated by checkbox using the code below Data Source Result: Branch,101,102,103,104,105,106,107,108,109,110 00001,null,null,null,null,null,null,null,null,null,null 00016,1,1,1,1,1,0,0,0,0,0 00244,1,1,1,1,1,1,1,1,1,1 <asp:TemplateField HeaderText="101"> <ItemTemplate> <asp:CheckBox runat="server" id="cb101" Checked='<%# Eval("101").ToString().Equals("1") %>' /> </ItemTemplate> </asp:TemplateField>... and so on It is properly working for checkbox if if the column is 0 and 1. Now what I need to do is if the column is null the checkbox should be disabled/readonly

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  • Drawing unfilled rectangle shape in c++ openGL

    - by Bahaa
    I want to draw unfilled rectangle shape in openGL using c++ programming language but when I used the glBegin(GL_QUADS) or glBegin(GL_POLYGON), the resulted shape is filled but I want to be unfilled. How I can draw unfilled rectangle. void draweRect(void) { glClear(GL_COLOR_BUFFER_BIT); glColor3f(0.0,0.0,1.0); glLineWidth(30); glBegin(GL_POLYGON); glVertex2i(50,90); glVertex2i(100,90); glVertex2i(100,150); glVertex2i(50,150); glEnd(); glFlush(); }

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  • What's a very easy C++ profiler (VC++)?

    - by John
    I've used a few profilers in the past and never found them particularly easy. Maybe I picked bad ones, maybe I didn't really know what I was expecting! But I'd like to know if there are any 'standard' profilers which simply drop in and work? I don't believe I need massively fine-detailed reports, just to pick up major black-spots. Ease of use is more important to me at this point. It's VC++ 2008 we're using (I run standard edition personally). I don't suppose there are any tools in the IDE for this, I can't see any from looking at the main menus?

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  • MFC: 'Gluing' two windows/dialogs together

    - by John
    I'm trying to set something up so my main dialog has one or more child dialogs, and these are glued/docked to the outside of the main dialog - when the main dialog is minimised, the children are too, when main dialog moves, children move with it. I'd tried setting child dialogs as having main dialog CWnd as parent, with CHILD style. But then they get clipped by the parent's boundary. If I set them as POPUP, they can be outside but then don't move with the parent. I'm looking at putting an OnMove handler on the parent dialog, but is there something built-in? And, should child dialogs still be children of the main dialog... I assume they should? This is VS2005 (I think VS2008 has some related functionality so I mention this).

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  • Why does C++ linking use virtually no CPU? (updated)

    - by John
    On a native C++ project, linking right now can take a minute or two, yet during this time CPU drops from 100% during compilation to virtually zero. Does this mean linking is primarily a disk activity? If so, is this the main area an SSD would make big changes? But, why aren't all my OBJ files (or as many as possible) kept in RAM after compilation to avoid this? With 4Gb of RAM I should be able to save a lot of disk access and make it CPU-bound again, no? update: so the obvious follow-up is, can VC++ compiler and linker talk together better to streamline things and keep OBJ files in memory, similar to how Delphi does?

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  • Added AJAX controls to toolkit but can't add them to webpage, no smart tags

    - by Eric3141
    Added AJAX controls to my toolkit as per directions online. They appear in the AJAX Toolkit tab in the toolbox just fine. Try to add them to design view and does not work. Tried selecting the textbox and clicking the smart tag to add the extender but there is not smart tag. Googled and found suggestion to reset toolbox and re-add AJAX controls. Did that and problem remains. Any help is appreciated!!!

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  • Turning Resharper on/off

    - by jmayor
    Can I switch reshaper on/off in a simple manner. The issue is sometimes I dealing with big files and makes my VS slow, sometimes it pops out a message telling me resharper is out of memory. Can I active/deactive it without having to reload the solution?

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  • Buffer size: N*sizeof(type) or sizeof(var)? C++

    - by flyout
    I am just starting with cpp and I've been following different examples to learn from them, and I see that buffer size is set in different ways, for example: char buffer[255]; StringCchPrintf(buffer, sizeof(buffer), TEXT("%s"), X); VS char buffer[255]; StringCchPrintf(buffer, 255*sizeof(char), TEXT("%s"), X); Which one is the correct way to use it? I've seen this in other functions like InternetReadFile, ZeroMemory and MultiByteToWideChar.

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  • Change a registry value in vb.net

    - by mhofer
    Hello, I have searched a lot to find a solution for my problem, but I can't find any specific solution. I need to change a value which is stored under HKEY_LOCAL_MACHINE\SOFTWARE\APP_NAME. It is not possible to use .NET's registry functions, since they have drastic restrictions. The following snippet should solve my problem: Dim regKey As RegistryKey Dim ver As Decimal regKey = My.Computer.Registry.LocalMachine.OpenSubKey("HKEY_LOCAL_MACHINE\SOFTWARE\APP_NAME", True) regKey.SetValue("IP", "192.168.10.15:18500") regKey.Close() Unfortunately, I get a NullReferenceExeption when I try to set the value. What should I do? I have imported Microsoft.Win32 and RegistryKey doesn't accept any constructor... cheers mike

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  • Global.asax for Unit Tests?

    - by AngryHacker
    In my MSTest UnitTest project, before running any tests, I need to execute some commands. Is there a feature, kind of like Global.asax is for web based projects, that will let me kick off something before any tests run?

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  • How to change the text of the multiple asp:label using for loop in C# ASP.NET

    - by Minelava
    I want to change the asp label multiple times. Here is the asp.net code <asp:Label ID="lbl_Text1" runat="server" Text=""> <asp:Label ID="lbl_Text2" runat="server" Text=""> <asp:Label ID="lbl_Text3" runat="server" Text=""> <asp:Label ID="lbl_Text4" runat="server" Text=""> Instead of using this: C# Code lbl_Text1.Text = "hello"; lbl_Text2.Text = "hello"; lbl_Text3.Text = "hello"; lbl_Text4.Text = "hello"; I tried to use for loop for (int i = 1; i <= 4; i++) { lbl_Text[i].Text = "hello"; } And I get this error..... cannot apply indexing with [] to an expression of type 'system.web.ui.webcontrols.label' Is there anyone can help me on that?

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  • problem with exporting a customized form from dll

    - by mavric
    I'm working on an application so i have write an dll which contain a form with some additional work and methods. so in the beginning of my program the thread launch this form (from my dll) to get some informations and then hide it and initialize some components and the application form and then show it. when the thread come the line where it define new instance of the exported form "MyForm inputform = new MyForm();" it throw an Exception called "Top-level control cannot be added to a control." so i don't know what to do ?!!. i tried to take the code of the form from the dll source code and put it in the main program and it works.... .but still i want to know what happen and what impede my application from run that form from my dll. thanks.

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  • VisualSVN and VS2008 integration - moving files

    - by tyndall
    If I drag and drop tracked .cs files to new folders in VS2008 with VisualSVN what message should I see when I commit the .cs file? I see added (+) shouldn't I see a "move"? I'm asking because I'm getting ready to do a major refactoring (including moving lots of files) and I don't want to lose my version history on these files. Note: I'm very new to Subversion, TortoiseSVN, and VisualSVN.

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  • Reporting Services URL parameter problems

    - by GxG
    I have an URL to a location on the server where it can find teh report. The report works just fine if i manually refresh it. I tried using rc:ClearSession=TRUE and i also tried sending a random parameter, but the report is still not being refreshed. Any ideas? The main scenario: User eneters the page(with a grid view) User clicks on Export User sees the Report User deletes an entry from the page - grid view User clicks on Export again User sees the exact same report P.S. : The report query returns the data that should be displayed but the report returns the previous data.

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  • Popup control from dll in web page

    - by Argons
    I'm developing a kind of framework that will work in web and win, so I have this interface: public interface IViewsManager { ... void ShowMessage(); ... } And I have the implementation for win that call a popup control from another dll. My problem is when I try to implement it for web enviroment, I have to call a popup control from another dll, and I would like to show the popup and the web page disables with a gray layer, and I don't know how to do it. Please, any help will be appreciated. Thanks in advance.

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