Recent questions tagged Delphi

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In Delphi XE is it possible to use XPath with a TXmlDocument component? I'm aware I can use late binding ... with Delphi XE supports XPath. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How do I declare an array when I don't know the length until run time?

I originally had an array[1..1000] that was defined as a global variable. But now I need that to be n, not ... the files can be of any size. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Standard URL encode function?

Is there a Delphi equivalent of this .net's method: Url.UrlEncode() Note I haven't worked with Delphi for ... can benefit from your experience. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Is COM broken in XE2, and how might I work around it?

Update: XE2 Update 2 fixes the bug described below. The program below, cutdown from the real program, fails ... outside my area of expertise. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to get a stack trace from FastMM

I've noticed in the following post that you can get a stack trace out of FastMM to show what appears to be ... I get the stack trace report? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to ensure only a single instance of my application runs?

Is there support in the Delphi XE VCL for ensuring only a single instance of an application is running? In the ... that is nice and modern? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Looking for a custom image grid

I'm trying to find a grid which is especially designed to show images. It needs to have good performance too, ... widths, and same with rows. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Using TRichEdit at runtime without defining a parent

I need to use a TRichEdit at runtime to perform the rtf to text conversion as discussed here. I succeded in ... RTFConverter.Free; end; end; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Initialise string function result?

I've just been debugging a problem with a function that returns a string that has got me worried. I've always assumed ... S); // 5 lines! end; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - What's the difference between CreateWnd and CreateWindowHandle?

Delphi components have CreateWnd and CreateWindowHandle (and DestroyWnd and DestroyWindowHandle). They're both intended ... them be overridden? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Selecting a directory with TOpenDialog

I'd really like to know the various ways I could select a directory with the TOpenDialog, whether it be ... you for all your answers. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to make a combo box with fulltext search autocomplete support?

I would like a user to be able to type in the second or third word from a TComboBox item and for that ... interfaces to get around this issue? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How do I draw the selected list-box item in a different color?

Is is possible to change the item selection focus color and text color in a TListBox? When themes are not ... Paint to illustrate the example. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to split string by a multi-character delimiter?

Is there a Delphi function to split string by a multi-character delimiter rather than a single character ? For ... in Delphi for this ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Modifying or deleting a line from a text file the low-level way?

I'm working with a Text File in Delphi, and I don't wish to use the method of loading/saving with a ... memory to be able to accomplish this. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to detach a panel and show it in a separate window?

Let's say I have form A that contains a panel (with many other controls in it) and a form B that it ... that there is a ParentWindow property. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to detect "dangling pointers" if "Assigned()" can't do it?

In another question, I found out that the Assigned() function is identical to Pointer <> nil. It has ... can to prevent their appearance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to insert image into database using TADOQuery Component Only

I have one simple fundamental issue, I am trying to insert image into the database using Insert statement with ... I overcome this issue. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Detect when the active element in a TWebBrowser document changes

Is there any event I can hook into to detect when the active element on a web page changes? For example, ... d rather avoid this if possible. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Putting classes in a DLL?

Is it possible to put some classes into a DLL? I have several custom classes in a project I am working ... example from the link above? Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Can 48x48 or 64x64 icons be obtained from the Vista Shell?

If 48x48 or 64x64 icons are present in the Vista Shell how can you get the handle to display one in a TImage ... , Image1.Picture.Bitmap ); Bill See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Changing component class at run-time on demand

My Question is similar to the idea here: Replacing a component class in delphi. But I need to change a ... interposer class will not do. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How can I make AllocateHwnd threadsafe?

VCL components are designed to be used solely from the main thread of an application. For visual components this ... from a background thread? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Which is preferable: Free or FreeAndNil?

What is the basic difference between Free and FreeAndNil? Is FreeAndNil = Free + Nil? When should I use Free and when should I use FreeAndNil? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to check URL with IdHTTP?

How can I check for the target URL for specific response code like 200 OK without Indy throwing all sorts ... properly ignore these exceptions. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Accidentally created a virus?

I've seen it happen reasonably often: I write an application in Delphi and when I compile it, the virus ... notice similar problems with Delphi? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Need multi-threading memory manager

I will have to create a multi-threading project soon I have seen experiments ( delphitools.info/2011/10/13/ ... a similar memory manager? Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Accessing protected event of TWinControl

imagine, you want to assign your own event procedure: procedure TSuperObject.DoSomething(Sender: TObject; Button: ... RTTI? How? Thanx See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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