AttendanceSystem | 考勤系统(JavaWeb课设)
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QUESTION
There is a button in web page in charge of activating the python script. And I used this package Python-Shell to run the command. But I had this error, when the button is clicked. I can see the light of webcam turn on and then turn off. Besides, the script can be executed manully in cmd. So any ideas about this?
Error messages
...ANSWER
Answered 2020-Apr-10 at 01:35I'm a Python newbie so please bear with me.
QUESTION
I want to make a app like that custom layout ScreenShot: .This is one row and I add like that row 100 more.So the people can clik number or its information(i
).
But it is shown like that : two buttons overlapping .But I want two button next to each other it is like that in custom_layout.xml(you can see screen shot).
This is my custom_layout.xml
:
ANSWER
Answered 2018-Apr-12 at 13:56I don't know if i get your question but you can simply use LinearLayout with weight. eg:-
QUESTION
I got this error and I don't know what I doing wrong. The code below is in the backrgoundworker.
Copy exception detail to the clipboard :
System.Runtime.InteropServices.InvalidComObjectException was unhandled by user code HResult=-2146233049 Message=COM object that has been separated from its underlying RCW cannot be used. Source=mscorlib
StackTrace: at System.StubHelpers.StubHelpers.StubRegisterRCW(Object pThis) at System.Data.Common.UnsafeNativeMethods.IAccessor.ReleaseAccessor(IntPtr hAccessor, Int32& pcRefCount) at System.Data.OleDb.RowBinding.Dispose() at System.Data.OleDb.OleDbCommand.ResetConnection() at System.Data.OleDb.OleDbCommand.Dispose(Boolean disposing) at System.ComponentModel.Component.Dispose() at AttendanceSystem.Student.frmNewStudent.bgwInsertStudent_DoWork(Object sender, DoWorkEventArgs e) in c:\Users\victorbaccaljr\Desktop\PROGRAM\Event Attendace System\AttendanceSystem\AttendanceSystem\Student\frmNewStudent.cs:line 138 at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e) at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument) InnerException:
code :
...ANSWER
Answered 2017-Sep-28 at 06:45As Aspirin mentioned in the comment you shouldn´t call Connection.Close
on your own. But that´s not a general rule. You´re right that the connection should be closed to free unmanaged resources like a connection to the database or file-handlers. However in your case as you have an enclosing using
-block that will automatically call Dipose
when the variable gets out of scope and thus will call Connection.Close
this latter call is done twice causing the exception when you´re closing the connection yourself.
Your using
-block would be similar to this:
QUESTION
I have a class called AttendanceSystem:
...ANSWER
Answered 2017-May-02 at 16:50Simply:
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