UEFMFile

A BlueprintType UObject representing a file on disk. Provides methods for reading, writing, and manipulating file data without needing to specify the directory and name each time.

Properties

Property	Type	Access	Description
Name	FString	ReadOnly	The file name
Extension	FString	ReadOnly	The file extension
Directory	FString	ReadOnly	The directory containing the file

Information Functions

GetFullPath

Pure Returns the full path (Directory + Name + Extension).

C++

FString GetFullPath()

Blueprint Node

ƒGet Full Path

Return Value

GetName

FString GetName()

GetExtension

FString GetExtension()

GetDirectory

FString GetDirectory()

GetSizeInBytes

Pure Returns file size in bytes.

C++

int64 GetSizeInBytes()

Blueprint Node

ƒGet Size In Bytes

Return Value

GetSizeInMegaBytes

Pure Returns file size in megabytes.

C++

double GetSizeInMegaBytes()

Blueprint Node

ƒGet Size In Mega Bytes

Return Value

GetHumanReadableSize

Pure Returns human-readable size string (e.g., "1.5 MB").

C++

FString GetHumanReadableSize()

Blueprint Node

ƒGet Human Readable Size

Return Value

GetCreationTime

Pure

C++

FDateTime GetCreationTime()

Blueprint Node

ƒGet Creation Time

Return Value

GetLastModifiedTime

Pure

C++

FDateTime GetLastModifiedTime()

Blueprint Node

ƒGet Last Modified Time

Return Value

GetLastAccessTime

Pure

C++

FDateTime GetLastAccessTime()

Blueprint Node

ƒGet Last Access Time

Return Value

GetMD5

Pure

C++

FString GetMD5()

Blueprint Node

ƒGet MD5

Return Value

GetSHA1

Pure

C++

FString GetSHA1()

Blueprint Node

ƒGet SHA1

Return Value

IsReadOnly

Pure

C++

bool IsReadOnly()

Blueprint Node

ƒIs Read Only

Return Value

SetReadOnly

Callable

C++

bool SetReadOnly(bool bReadOnly)

Blueprint Node

ƒSet Read Only

B Read Only

Return Value

---

Data Access - Strings

GetStrings

Pure Reads all lines into a string array.

C++

TArray<FString> GetStrings()

Blueprint Node

ƒGet Strings

Return Value

GetSingleString

Pure Reads entire file into one string.

C++

FString GetSingleString()

Blueprint Node

ƒGet Single String

Return Value

AppendString

Callable Appends a string to the file.

C++

void AppendString(FString StringToAppend)

Blueprint Node

ƒAppend String

String To Append

---

Data Access - Images

GetTexture

Pure Converts the file to a Texture2D.

C++

void GetTexture(EImageConversionResult& ConversionResult, UTexture2D*& Texture)

Blueprint Node

ƒGet Texture

Conversion Result

Texture

Parameter	Type	Direction	Description
ConversionResult	EImageConversionResult	Out	Result of the conversion
Texture	UTexture2D*	Out	The converted texture

---

Data Access - Sound

GetSound

Pure Converts the file to a SoundWave.

C++

USoundWave* GetSound()

Blueprint Node

ƒGet Sound

Return Value

---

Data Access - Raw Bytes

GetBytes

Pure

C++

TArray<uint8> GetBytes()

Blueprint Node

ƒGet Bytes

Return Value

WriteBytes

Callable

C++

bool WriteBytes(TArray<uint8> ByteDataToWrite)

Blueprint Node

ƒWrite Bytes

Byte Data To Write

Return Value

---

Data Access - CSV

GetCsvDataAsString

Pure

C++

FString GetCsvDataAsString(FString Delimiter = TEXT(","))

Blueprint Node

ƒGet Csv Data As String

Delimiter

?

Return Value

---

Data Access - INI

GetIniDataAsString

Pure

C++

FString GetIniDataAsString()

Blueprint Node

ƒGet Ini Data As String

Return Value

---

Data Access - JSON

GetJsonData

Pure Reads JSON file into a TMap.

C++

TMap<FString, FString> GetJsonData()

Blueprint Node

ƒGet Json Data

Return Value

WriteJsonData

Callable Writes a TMap as JSON to the file.

C++

bool WriteJsonData(TMap<FString, FString> Data)

Blueprint Node

ƒWrite Json Data

Data

Return Value

---

Data Access - Encryption

Encrypt

Callable Encrypts the file with XOR.

C++

bool Encrypt(FString Key)

Blueprint Node

ƒEncrypt

Key

Return Value

Decrypt

Callable Decrypts the file with XOR.

C++

bool Decrypt(FString Key)

Blueprint Node

ƒDecrypt

Key

Return Value

---

Chunked Operations

ReadChunk

Callable Reads a chunk of bytes from the file.

C++

bool ReadChunk(int64 Offset, int32 Size, TArray<uint8>& OutData)

Blueprint Node

ƒRead Chunk

Offset

Size

Out Data

Return Value

Parameter	Type	Direction	Description
Offset	int64	In	Byte offset to start reading from
Size	int32	In	Number of bytes to read
OutData	TArray<uint8>	Out	The read bytes

WriteChunk

Callable Writes bytes at a specific offset.

C++

bool WriteChunk(int64 Offset, const TArray<uint8>& Data)

Blueprint Node

ƒWrite Chunk

Offset

Data

Return Value

AppendChunk

Callable Appends bytes to the end of the file.

C++

bool AppendChunk(const TArray<uint8>& Data)

Blueprint Node

ƒAppend Chunk

Data

Return Value

---

Usage Example

// Create a file
CreateFile(GetGameSavedDirectory(), "data.txt") -> bSuccess, MyFile

// Write to it
MyFile.AppendString("Line 1")
MyFile.AppendString("Line 2")

// Read it back
Lines = MyFile.GetStrings()
Size = MyFile.GetSizeInBytes()
ReadableSize = MyFile.GetHumanReadableSize()  // e.g., "12 B"

// Get hash
Hash = MyFile.GetMD5()

// Check attributes
bReadOnly = MyFile.IsReadOnly()