invoke

问题 How would one write PHP code to call all "Callables" with __invoke() ? The desire here is pass by reference, which is deprecated with call_user_func[_array]() . I did see that there is a package out there, TRex\Reflection\CallableReflection , but this seems to utilize call_user_func() in the background, and would suffer the same issue. <?php function passthrough_invoke(callable $callback) { return $callback->__invoke(); } function passthrough_user(callable $callback) { return call_user_func(

问题 What exactly does Control.Invoke(Delegate) do to get the delegate to run on the GUI thread? Furthermore, Its my understanding that invoke will block until the invoked function its done. How does it achieve this? I would like some good gritty details. I'm hoping to learn something interesting. 回答1: Edit: The control implements ISynchronizeInvoke interface, You can make the same effect using the SynchronizationContext and call Post when you call Invoke . something like: public object Invoke

问题 I'm trying to call a method using a string, but there a problem: void make_moviment(string mov,Vector3 new_mov){ GameObject past_panel = GameObject.Find(actual_level.ToString()); Type t = Type.GetType(past_panel.GetComponents<MonoBehaviour>()[0].GetType ().Name); MethodInfo method = t.GetMethod("get_answer"); method.Invoke(t,new object[] { mov })); <--- PROBLEM HERE } There's always this error "Object does not match target type" related with the last line. Do you have any recommendations? 回答1

问题 Could anyone help me i have a problem I'm trying to get this code to work in the background via threadpool but i cannot seem to get it to work i keep getting this error: Cross-thread operation not valid: Control 'ListBox3' accessed from a thread other than the thread it was created on. Here is the code i am using: private void DoWork(object o) { var list = ListBox3; var request = createRequest(TxtServer.Text, WebRequestMethods.Ftp.ListDirectory); using (var response = (FtpWebResponse)request

问题 Could anyone help me i have a problem I'm trying to get this code to work in the background via threadpool but i cannot seem to get it to work i keep getting this error: Cross-thread operation not valid: Control 'ListBox3' accessed from a thread other than the thread it was created on. Here is the code i am using: private void DoWork(object o) { var list = ListBox3; var request = createRequest(TxtServer.Text, WebRequestMethods.Ftp.ListDirectory); using (var response = (FtpWebResponse)request

问题 I'm not even sure I understand this situation enough to come up with a proper title. I come from a modest understanding of VB6 and having to climb a steep learning curve for VB 2010. I am trying to create a multi-client server program that will communicate with my Enterprise iPhone app. I found a relatively simple example to build upon here: http://www.strokenine.com/blog/?p=218. I have been able to modify the code enough to make it work with my app, but with one glitch: I can't get access to

问题 I am having a problem reading an item from a ListView. The ListView is in the main thread, and the part where I read it out is in another class and another thread. My code is as follows: Public Class Form1 Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load Dim ltm As ListViewItem = New ListViewItem ltm.Text = "test1" ltm.SubItems.Add("test2") ltm.SubItems.Add("test3") Me.ListView2.Items.Add(ltm) Dim l As New test Dim x As New Threading.Thread(AddressOf l.readout) End

问题 I am reading data from an arduino at a baud rate of 115200. The data comes in as a string on its own line in the format: <ID,Name/Data> . I believe that the problem with my code is that it is not handling the incoming data fast enough and the incoming data is being forced to wait for old data to be processed. The incoming string is split into the three separate categories (ID, Name, Data) and added to a data table called dtFromGrid which is bound to dataGridView1 . Is there any errors or

问题 I'm trying to call the method 'MyMethod' of class 'CMyClass'. This method has a parameter of type "CBaseClass", and I'm passing an object of type "CDerivedClass". Class CBaseClass Public m_AMember As String Sub MethodOne() // DoSomething End Sub End Class Class CDerivedClass Inherits CBaseClass Public m_MyMember As Integer Sub MethodTwo() // DoSomething End Sub End Class Class CMyClass Sub MyMethod(ByVal obj As CBaseClass) // DoSomething End Sub End Class Sub Main() 'load assembly Dim

问题 I have a query that return USB devices attached in: SelectQuery sq = new SelectQuery("select DeviceID, Model from Win32_DiskDrive where InterfaceType='USB'"); ManagementObjectCollection MOC = new ManagementObjectSearcher(sq).Get(); But it doesn't retrieve the SD card information. How do i can retrieve this SD cards information using WMI queries? 回答1: i modified "select DeviceID, Model from Win32_DiskDrive where InterfaceType='USB'" removing "where InterfaceType='USB" 来源： https://stackoverflow