OpenFile

OpenFile Filename$, ChannelIndex

Parameters:     Filename$ = The name of the file you wish to read or write data to     ChannelIndex = Index of the file channel to use

Returns: NONE

OpenFile opens a file channel for combined read and write access. The command requires both the filename of the file to open for reading/writing, and a file channel index for use with subsequent reading commands (ie ReadByte, ReadWord, ReadInt WriteByte, WriteWord, WriteInt etc etc.      Files can be accessed both sequentially and randomly. Sequential Access       Sequential file access, is when you step through the file in order, in other words, you begin reading at the start of the file, and continue reading through it from start to finish. Never stepping backward or skipping forward. Random Access      Random file access, is where you jump around the file reading one section, then perhaps jumping back or skipping forward over some data. So your randomly accessing parts of file at will. This is often invaluable when you need to read data sections found in image files, or constructing your own pack file format perhaps. FACTS:       * When Reading data from a file, the File Must exist in order to be read. If you're just wanting to read data from the file, then we recommend using ReadFile or ReadNewFile       * File Must exist before it can written to. See-> MakeFile Mini Tutorial:      This example creates a simple file with some various bits of data store in it, then read it's back again.      File$=TempDir$()+"PB_TestFile.txt"    ; CReate a File for writing data to   WriteFile File$,1    ; Write a Byte to file channel 1, of value 200   WriteByte 1,200    ; Write a Word to file channel 1, of value 64000   WriteWord 1,64000    ; Write a INTEGER to file channel 1, of value 123456   WriteInt 1,123456    ; Write a FLOAT to file channel 1, of value 123.456   WriteFloat 1,123.456    ; Write a String to file channel 1, of value Hello World   WriteString 1,"Hello Word"    ; Close this file channel   CloseFile 1         Print "============================"   Print "Reading File:"+File$   Print "============================"       ; Open a file to READ with READFILE   ReadFile File$,1    ; Read and display the byte value   Print "   Byte Data:"+Str$(ReadByte(1))    ; Read and display the word value   Print "   Word Data:"+Str$(ReadWord(1))    ; Read and display the Integer value   Print "Integer Data:"+Str$(ReadInt(1))    ; Read and display the Float value   Print "  Float Data:"+Str$(ReadFloat(1))    ; Read and display the String value   Print "  String Data:"+ReadString$(1)    ; Close this file channel   CloseFile 1         If FileExist(file$) Then DeleteFile file$    ; Display the screen and wait for a key press   Sync   WaitKey    This example would output.      ============================   Reading File:C:Windows\temp\Pb_TestFile.txt   ============================   Byte Data:200   Word Data:64000   Integer Data:123456   Float Data:123.456   String Data:Hello World

Related Info:	CloseFile | FilePos | FileSize | ReadByte | ReadByteAt | ReadChr$ | ReadChrAt$ | ReadFile | ReadFloat | ReadFloatAt | ReadInt | ReadIntAt | ReadString$ | ReadStringAt$ | ReadValue | ReadValue# | ReadWord | ReadWordAt | WriteFile | WriteFloat | WriteFloatAt | WriteInt | WriteIntAt | WriteString | WriteStringAt | WriteWord | WriteWordAt :

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