C++ has a lot of great libraries to operate on every case, on every item. We can create or delete directories by using System Commands that we explained before in this post or we can use C++ standard library methods. In C++ Builder, we can use both of them and we can also use Disk And Directory Support Routines to create or remove directories or to get information about disks, directories, and files. These methods are easy to remember, very friendly, and smart.
In this post, you’ll get answers to these questions:
- How can I delete a file in C++ Builder?
- How can I use DeleteFile method in C++ Builder?
By learning how to delete a file on Windows in C++ Builder, and how to compile c++ in windows. It will help you to easily build C++ applications.
How can I delete a file by using the DeleteFile method in C++?
DeleteFile Method (System::SysUtils::DeleteFile Method) is a SysUtils Method listed in Disk And Directory Support Routines that deletes a file from disk. DeleteFile deletes the file named by FileName from the disk. If the file cannot be deleted or does not exist, the function returns False.
Note that DeleteFile can delete a symbolic link from a file or a directory and is the preferred method for deleting symlinks.
Here is the Syntax for the DeleteFile() Method in C++ Builder:
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bool __fastcall DeleteFile(const System::UnicodeString FileName); |
We can call IsEmpty to check whether a given directory is empty. An empty directory is considered to have no files or other directories in it. IsEmpty returns true if the directory is empty; false otherwise. The following table lists the parameters expected by this method.
| Name | Meaning |
|---|---|
| Path | Path of the directory being checked. |
Note: If the Path parameter is an empty string, IsEmpty returns false.
Here is a Simple Example to DeleteFile() Method in C++ Builder,
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bool deleted = DeleteFile( L"D:\\MyFolder\\MyImage.jpg" ); |
is there a full Example of using the DeleteFile method in C++ Builder?
Here is Full C++ Builder VCL example that deletes a file,
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#include <vcl.h> #pragma hdrstop #include "Create_Directory_Unit1.h" //--------------------------------------------------------------------------- #pragma package(smart_init) #pragma resource "*.dfm" TForm1 *Form1; //--------------------------------------------------------------------------- __fastcall TForm1::TForm1(TComponent* Owner) : TForm(Owner) { if( FileExists(L"D:\\MyFolder\\MyImage.jpg")) { bool deleted = DeleteFile( L"D:\\MyFolder\\MyImage.jpg" ); if (deleted) { ShowMessage("File deleted successfuly"); } } } |
Please be careful when you use this method, always ask to user with full name of file if he is sure to delete it.
Where can I find more information on file handling routines in C++?
Use this dynamic link to search for more path manipulation methods: https://learncplusplus.org/?s=file
C++ Builder is the easiest and fastest C and C++ IDE for building simple or professional applications on the Windows, MacOS, iOS & Android operating systems. It is also easy for beginners to learn with its wide range of samples, tutorials, help files, and LSP support for code. RAD Studio’s C++ Builder version comes with the award-winning VCL framework for high-performance native Windows apps and the powerful FireMonkey (FMX) framework for cross-platform UIs.
There is a free C++ Builder Community Edition for students, beginners, and startups; it can be downloaded from here. For professional developers, there are Professional, Architect, or Enterprise versions of C++ Builder and there is a trial version you can download from here.
