events

问题 In Windows Forms when a UserControl or Form first time becomes visible the Load event is fired. http://msdn.microsoft.com/en-us/library/system.windows.forms.usercontrol.load.aspx Is there any such event for controls like Checkbox, TextBox, Label ? 回答1: No. You could use the HandleCreated event, it is fired when the native window for the control is created. The first event you can rely on to run after the class constructor ran. It is triggered when the parent adds the control to its Controls

问题 In Windows Forms when a UserControl or Form first time becomes visible the Load event is fired. http://msdn.microsoft.com/en-us/library/system.windows.forms.usercontrol.load.aspx Is there any such event for controls like Checkbox, TextBox, Label ? 回答1: No. You could use the HandleCreated event, it is fired when the native window for the control is created. The first event you can rely on to run after the class constructor ran. It is triggered when the parent adds the control to its Controls

问题 I've always assigned event handlers like this, guided by Intellisense auto-completion. RangeSelector.RangeChanged += new EventHandler(RangeSelector_RangeChanged); I've recently noticed one of my colleagues does it this way. RangeSelector.RangeChanged += RangeSelector_RangeChanged; Both methods are syntactically correct, compile and behave as expected. What are the differences, benefits or disadvantages of these methods. Do they result in the same IL code or is there some subtle difference

问题 I've always assigned event handlers like this, guided by Intellisense auto-completion. RangeSelector.RangeChanged += new EventHandler(RangeSelector_RangeChanged); I've recently noticed one of my colleagues does it this way. RangeSelector.RangeChanged += RangeSelector_RangeChanged; Both methods are syntactically correct, compile and behave as expected. What are the differences, benefits or disadvantages of these methods. Do they result in the same IL code or is there some subtle difference

问题 When i don't set background of my panel i can not get mouse events on that. why this behaviour? I am able to get mouse events on panel by setting Background to Transparent which is null by default. Whats the difference between Background null and Transparent? 回答1: When Background=null it doesn't issue any drawing command to MILCore when rendering, and it doesn't count the control's entire area in hit testing. When Background=Transparent , it issues an ordinary drawing command to MILCore when

问题 When i don't set background of my panel i can not get mouse events on that. why this behaviour? I am able to get mouse events on panel by setting Background to Transparent which is null by default. Whats the difference between Background null and Transparent? 回答1: When Background=null it doesn't issue any drawing command to MILCore when rendering, and it doesn't count the control's entire area in hit testing. When Background=Transparent , it issues an ordinary drawing command to MILCore when

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 1 year ago . Improve this question I have been investigating Event Tracing for Windows (ETW) for use within existing backend/server applications. MSDN and other sources have sold the power of the framework and its integration with xperf, etc. which frankly I am impressed with. However I am a bit

问题 I'm just starting out with WPF and need some help with routed events. I have added a datagrid with some animation, but i can't seem to find anywhere that shows me a list of routed events to use on the datagrid, or any other control for that matter. Seems to be a guessing game so far. I thought the datagrid standard events, such as CellEditEnding, was it but they are not as it says "Invalid event name". The example I copied used a MouseEnter routed event, but i don't know what else there is

问题 I'm just starting out with WPF and need some help with routed events. I have added a datagrid with some animation, but i can't seem to find anywhere that shows me a list of routed events to use on the datagrid, or any other control for that matter. Seems to be a guessing game so far. I thought the datagrid standard events, such as CellEditEnding, was it but they are not as it says "Invalid event name". The example I copied used a MouseEnter routed event, but i don't know what else there is

问题 I'm working with MySQL 5.1.39 and Visual Studio 2008 and connecting both with MySQL Connector Net 6.1.2. What I'd like to do is once a MySqlConnection object is created, be able to handle the "event raised" when a field in a specific row in a given table is updated. I mean, when that value in that table has been manually changed or modified from any other application, I'd like to receive a signal in my opened VB.NET application. Until now, I do it from opened VB.NET application checking that