Open Statement

डेटा च्यानल खोल्दछ ।

Open pathname For mode [Access io] [locking] As [#]filenum [Len=recLen]

pathname: Path and name of the file to open. If you try to read a file that does not exist (Access = Read), an error message appears. If you try to write to a file that does not exist (Access = Write), a new file is created.

mode: Keyword that specifies the file mode. Valid values: Append (append to sequential file), Binary (data can be accessed by bytes using Get and Put), Input (opens data channel for reading), Output (opens data channel for writing), and Random (edits relative files).

io: Keyword that defines the access type. Valid values: Read (read-only), Write (write-only), Read Write (both).

locking: Keyword that defines the security status of a file after opening. Valid values: Shared (file may be opened by other applications), Lock Read (file is protected against reading), Lock Write (file is protected against writing), Lock Read Write (denies file access).

filenum: Any integer expression from 0 to 511 to indicate the number of a free data channel. You can then pass commands through the data channel to access the file. The file number must be determined by the FreeFile function immediately before the Open statement.

recLen: For Random access files, set the length of the records.

तपाईँले केबल खुला कथन सँग खुलेको फाइलका सामग्रीहरू मात्र परिमार्जन गर्न सक्नुहुन्छ । यदि तपाईँले फाइल खोल्न प्रयास गर्नुभयो भने त्यो पहिलेनै खुलेको हुन्छ, त्रुटि सन्देश पठाउँछ ।

  Sub ExampleWorkWithAFile
      Dim iNumber As Integer
      Dim sLine As String
      Dim aFile As String
      Dim sMsg As String
      aFile = "C:\Users\ThisUser\data.txt"
      iNumber = Freefile
      Open aFile For Output As #iNumber
      #iNumber, "यो पाठको लाइन हो" मुद्रण गर्नुहोस्
      #iNumber मुद्रण गर्नुहोस्, "This is another line of text"
      Close #iNumber
      iNumber = Freefile
      Open aFile For Input As iNumber
      While Not eof(iNumber)
          Line Input #iNumber, sLine
          If sLine <>"" Then
              sMsg = sMsg & sLine & chr(13)
          End If
      Wend
      Close #iNumber
      MsgBox sMsg
  End Sub

  Sub ExampleWorkWithAFile
      Dim iNumber As Integer
      Dim sLine As String
      Dim aFile As String
      Dim sMsg As String
      aFile = "~/data.txt"
      iNumber = Freefile
      Open aFile For Output As #iNumber
      Print #iNumber, "This is a line of text"
      Print #iNumber, "This is another line of text"
      Close #iNumber
      iNumber = Freefile
      Open aFile For Input As iNumber
      While Not eof(iNumber)
          Line Input #iNumber, sLine
          If sLine <>"" Then
              sMsg = sMsg & sLine & chr(13)
          End If
      Wend
      Close #iNumber
      MsgBox sMsg
  End Sub
  

If the Open statement tries to open a file to which the current user does not have read/write permissions, an I/O error will be raised.