pascalscript - How to check if an object is NULL in Inno Setup Pascal Script? -

-

I am writing a Pascal function using these setup studios which is an object blank and does something

< P> I still have: 

  XMLDocument.setProperty ('select language', 'XPath'); XMLNode: = XMLDocument.selectSingleNode (AEP); If (XMLNode = null) starts then // do stout and end // other stuff

but I keep getting the invalid version operation error.

How do I check whether the object is empty in the Inno Setup Pascal script code?

if any variant is null Use: 

  If VarIsNull (XMLNode) then

However, in your case, the problem is a bit more complicated. The method always gives a type of type whose real data pointer is not a node found in the case of an XML dome node, or zero . In Delphi (the language in which the INA setup Pascal script has been written) is such a ceremony that includes such a situation. Unfortunately, this is not published in the setup. You can however, test this matter with a statement like this. : 

  If (IDPatch (XMLNode) = zero) then

this data will be returned from the variant and for zero They test the data.

Martijn Laan added the VarIsClear function to the Unicode version of the INO setup, so INO Setup 5.5.6 will give you the VarIsClear instead of the above hack Can be used.


Comments

Post a Comment

Popular posts from this blog

apache - 504 Gateway Time-out The server didn't respond in time. How to fix it? -

-
Using a form submission on an embedded iframe , the customer downloads a compressed log file Requested. The request was sent to the server, which is the compressed log files, perform some database operations and returns a compressed file. After just 2 minutes, 504 gateway time-out server did not respond timely message on browser net panel How to fix this error? The log files were taking a long time to compress, and timeout was set to 2min The error was fixed by extending the file file: # # timeout: The number of seconds before getting the time out. # # # Timeout 120 timeout 600
Read more

c# - .net WebSocket: CloseOutputAsync vs CloseAsync -

-
We have a working ASP.NET Web API REST service, which is one of the methods of our controller, HTTPTTEX. .) Socket handler code looks something like this ... Public async task socket handler (AspNetWebSocketContext context) {_webSocket = context.WebSocket; ... while (! Cts.IsCancellationRequested) {WebSocketReceiveResult Results = _webSocket.ReceiveAsync (Input Segment, cts.Token) .Result; WebSocketsStateCollusocketState = _webSocket.State; If (result.MessageType == WebSocketMessageType.Close || currentSocketState == WebSocketState.CloseReceived) {// What should I use. CloseAysnc () or. CloseOutputAsync ()? _webSocket.CloseOutputAsync (WebSocketCloseStatus.NormalClosure, "Client Requested", cts.Token). Wait (); } If (currentSocketState == WebSocketState.Open) {...}}} .What is the difference between .CooseAsync () and CloseOutputAysnc ()? I tried both of them and they both seemed to work fine but some difference should be the same they both describe very similar to...
Read more

c++ - How to properly scale qgroupbox title with stylesheet for high resolution display? -

-
I am trying to apply a stylesheet for QGroupBox (QT4.8), which works on the normal screen ( 96 dpi) high resolution screen (Yoga 2 Pro, 3200x1800, 275 dpi, windows 8.1). The following style looks good on the 275 dpi screen, but the top margins on a regular 96 dpi screen are far too big. QGroupBox {border: 1px solid red; Range radius: 7px; Margin-top: 12x; } QGroupBox :: Title {subcontrol-origin: margin; Subcontrol-position: left above; Padding-left: 10px; Padding-right: 10px; } Changing the top-margin has an effect, but I did not get a proper setting which works on both screens. If I shorten the value, the content of the group box overlaps with the title on 275 dpi screen. I was also playing with units "East", "PX", "MX", "PT". Reading the document I would have guessed, "2 X" was the correct solution, which should be scaled with different screen resolutions. Without the stylesheet, the groupbox works well on both screens. ...
Read more