handles | 易学教程

Does C# have a Handles keyword?

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Protected Sub Menu1_MenuItemClick(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.MenuEventArgs) Handles Menu1.MenuItemClick End Sub In VB.net, we have the Handles keyword, I'm wondering if C# has anything comparable. Or do you have to manually wire all the methods to each control's event (in ASP.NET especially)? Nope. You will have to wire up the event like this Menu1.MenuItemClick += Menu1_MenuItemClick; Its pretty easy to setup handlers in C#. In my option much easier than VB.Net. You'll need to make sure the handler gets setup early enough in the page to get fired off. Just

Does C# have a Handles keyword?

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问题 Protected Sub Menu1_MenuItemClick(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.MenuEventArgs) Handles Menu1.MenuItemClick End Sub In VB.net, we have the Handles keyword, I'm wondering if C# has anything comparable. Or do you have to manually wire all the methods to each control's event (in ASP.NET especially)? 回答1: Nope. You will have to wire up the event like this Menu1.MenuItemClick += Menu1_MenuItemClick; 回答2: Its pretty easy to setup handlers in C#. In my option much

Eclipse Unhandled event loop exception, no more handles Windows 7

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My Eclipse is used to develop Android Apps. It worked fine until one day, a Unhandled event loop exception is prompt. The log is shown below. To trigger the error prompt, just unfocus the text editor in eclipse and focus it again, then the prompt is triggered, For example, click on the Package explorer (Red circle) and click on the code (Green circle) in Main.java in Eclipse. (.xml are the same). But, if I unfocus the code by clicking Package Explorer (Red circle) then click on the title of the code (Blue circle) and then click on the code (Green circle), the error will not be prompted. P.S.

Resizable handles with jQueryUI

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I need to make resizable handles like in this image. To be more specific, I need those blue dots to be around my <div> to allow resizing from different sides. Currently I'm using the following code: <html> <head> <link rel="stylesheet" href="jquery-ui-1.10.2/themes/base/jquery-ui.css" /> <script src="jquery-1.9.1.min.js"></script> <script src="jquery-ui-1.10.2/ui/jquery-ui.js"></script> <title>border</title> <script type="text/javascript"> $(function() { $('#elementResizable').resizable({ handles: { 'ne': '#negrip', 'se': '#segrip', 'sw': '#swgrip', 'nw': '#nwgrip' } }); }); </script> <style>

Difference between HANDLE and HWND in Windows API?

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I'm trying to use function SetForegroundWindow(HWND hWnD) . I have some handles but it's not working as parameter of above function. My handle is a thread and I want to run it in foreground. What are the differences between a HWND and a HANDLE? They are just abstract data types . According to MSDN , HANDLE and HWND are defined as: HANDLE is a handle to an object. HWND is a handle to a window. So, a HWND is a HANDLE , but not all HANDLE s are HWND . In fact: typedef void *PVOID; typedef PVOID HANDLE; typedef HANDLE HWND; Example You should only pass HWND to SetForegroundWindow unless you know

UI Thread .Invoke() causing handle leak?

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问题 In what circumstances would updating a UI control from a non-UI thread could cause the processes' handles to continually increase, when using a delegate and .InvokeRequired ? For example: public delegate void DelegateUIUpdate(); private void UIUpdate() { if (someControl.InvokeRequired) { someControl.Invoke(new DelegateUIUpdate(UIUpdate)); return; } // do something with someControl } When this is called in a loop or on timer intervals, the handles for the program consistently increase. EDIT:

Finding & using the currently active Chatbox in the Skype Client thru the WinAPI & Delphi?

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In Delphi, by using the Skype API, I can send a message to a contact fairly easy. However, what I am trying to do, is enter the message in the Chat Box of the currently focused Contact, without sending the message. By using Winspector, I found that the Classname of the Chatbox is TChatRichEdit, which is placed on a TChatEntryControl, which is placed on a TConversationForm, and finally, which is placed on the tSkMainForm. (Obviously the Skype Client is coded in Delphi ;) ) By using the Win API, how can I find the correct tSkMainForm>TConversationForm>TChatEntryControl>TChatRichEdit , and then

Finding & using the currently active Chatbox in the Skype Client thru the WinAPI & Delphi?

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问题 In Delphi, by using the Skype API, I can send a message to a contact fairly easy. However, what I am trying to do, is enter the message in the Chat Box of the currently focused Contact, without sending the message. By using Winspector, I found that the Classname of the Chatbox is TChatRichEdit, which is placed on a TChatEntryControl, which is placed on a TConversationForm, and finally, which is placed on the tSkMainForm. (Obviously the Skype Client is coded in Delphi ;) ) By using the Win API

Handles Comparison: empty classes vs. undefined classes vs. void*

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Microsoft's GDI+ defines many empty classes to be treated as handles internally. For example, (source GdiPlusGpStubs.h ) //Approach 1 class GpGraphics {}; class GpBrush {}; class GpTexture : public GpBrush {}; class GpSolidFill : public GpBrush {}; class GpLineGradient : public GpBrush {}; class GpPathGradient : public GpBrush {}; class GpHatch : public GpBrush {}; class GpPen {}; class GpCustomLineCap {}; There are other two ways to define handles. They're, //Approach 2 class BOOK; //no need to define it! typedef BOOK *PBOOK; typedef PBOOK HBOOK; //handle to be used internally //Approach 3

Migrating 'Handles' from VB.NET to C#

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I'm migrating some code from VB.NET to C# (3.5). I find structures like: Public Event DataLoaded(ByVal sender As Object, ByVal e As EventArgs) Protected Sub Mag_Button_Load_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Mag_Button_Load.Click [..] RaiseEvent DataLoaded(Me, EventArgs.Empty) End Sub [..] 'Other Class Private Sub LoadData(ByVal sender As Object, ByVal e As System.EventArgs) Handles oData.DataLoaded [..] End Sub What is the most straightforward way to translate such behaviour to C#? I recommend using the Telerik Code Converter as a start. C# does not have that easy