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![CreateTextFile Method
The CreateTextFile method creates a new text file in the current
folder and returns a TextStream object that can be used to read
from, or write to the file
Syntax
FileSystemObject.CreateTextFile(filename[,overwrite[,unicode]]
Parameter Description
filename Required. The name of the file to create
overwrite Optional. A Boolean value that indicates whether an
existing file can be overwritten. True indicates that the
file can be overwritten and False indicates that the file
can not be overwritten. Default is True
unicode Optional. A Boolean value that indicates whether the file
is created as a Unicode or an ASCII file. True indicates
that the file is created as a Unicode file, False indicates
that the file is created as an ASCII file. Default is False](https://image.slidesharecdn.com/asp1-textfile-251209070202-31ed3ca1/75/ACTIVE-SERVER-PAGES-FOR-BEGINNERS-1-textfile-pptx-3-2048.jpg)
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ACTIVE SERVER PAGES FOR BEGINNERS 1-textfile.pptx
- 1. One of themost important tasks in any programming language is the ability to read and write files. The steps involved in ASP are no different than many other languages: • Specify the location of the file • Determine if the file exists • Get a handle to the file • Read the contents • Close the file and release any resources used
- 2. • File I/Oin ASP can be done using the FileSystemObject component. When opening a text file you simply open it as a text stream, and it is this text stream that you use to access the contents of the file. • The FileSystemObject allows you to perform all file and folder handling operations. It can either return a file which can then be opened as a text stream, or it can return a text stream object directly. • Two different methods. The first method gets a file object and uses that to open the text stream, and the second method opens the text stream directly from the FileSystemObject.
- 3. CreateTextFile Method The CreateTextFilemethod creates a new text file in the current folder and returns a TextStream object that can be used to read from, or write to the file Syntax FileSystemObject.CreateTextFile(filename[,overwrite[,unicode]] Parameter Description filename Required. The name of the file to create overwrite Optional. A Boolean value that indicates whether an existing file can be overwritten. True indicates that the file can be overwritten and False indicates that the file can not be overwritten. Default is True unicode Optional. A Boolean value that indicates whether the file is created as a Unicode or an ASCII file. True indicates that the file is created as a Unicode file, False indicates that the file is created as an ASCII file. Default is False
- 4. <% dim fs, Set fs=Server.CreateObject("Scripting.FileSystemObject") Setf=fs.CreateTextFile("c:test.txt",true) f.WriteLine("Hello World!") f.Close set f=nothing set fs=nothing %>
- 5. FileExists Method Parameter Description filenameRequired. The name of the file to check if exist The FileExists method returns a Boolean value that indicates whether a specified file exists. It returns True if the file exists and False if not. Syntax FileSystemObject.FileExists(filename)
- 6. <html> <body> <% Set fs=Server.CreateObject("Scripting.FileSystemObject") If (fs.FileExists(“abcd.txt"))=true Then Response.Write(“Fileexists.") Else Response.Write(“File does not exist.") End If set fs=nothing %> </body> </html>
- 7. OpenTextFile Method The OpenTextFilemethod opens a specified file and returns a TextStream object that can be used to access the file. Syntax FileSystemObject.OpenTextFile(fname,mode,create,format) Parameter Description fname Required. The name of the file to open mode Optional. How to open the file1=ForReading - Open a file for reading. You cannot write to this file. 2=ForWriting - Open a file for writing. 8=ForAppending - Open a file and write to the end of the file. create Optional. Sets whether a new file can be created if the filename does not exist. True indicates that a new file can be created, and False indicates that a new file will not be created. False is default
- 8. <% dim fs, Set fs=Server.CreateObject("Scripting.FileSystemObject") Setf=fs.OpentextFile("c:test.txt",true) f.WriteLine("Hello World!") f.Close set f=nothing set fs=nothing %>
- 9. The asp TextStreamObject allows you to access the contents of the file as a text file.Once you have access to the file you can read write information.Using this you can access the files with .txt ,.html, .asp ,or.log extensions. There are three ways that we can crate a text stream object.
- 10. METHOD SYNTAX DESCRIPTION Read obj.Read(NoOfCha r) Readsa specified number of characters from a TextStream file and returns the resulting string ReadLine obj.ReadLine Reads an entire line (up to, but not including, the newline character) from a TextStream file and returns the resulting string. ReadAll obj.ReadAll Reads an entire TextStream file and returns the resulting
- 11. METHOD SYNTAX DESCRIPTION Writeobj.Write(string) Writes a specified string to a TextStream file WriteLine obj.WriteLine(stri ng) Writes a specified string and newline character to a TextStream file.string is optional.If omitted, a newline character is written to the file. WriteBlan kLines obj.WriteBlankLin es(lines) Writes a specified number of newline characters to a
- 12. METHOD SYNTAX DESCRIPTION Read obj.Read(NoOfCha r) Readsa specified number of characters from a TextStream file and returns the resulting string ReadLine obj.ReadLine Reads an entire line (up to, but not including, the newline character) from a TextStream file and returns the resulting string. ReadAll obj.ReadAll Reads an entire TextStream file and returns the resulting
- 13. METHOD SYNTAX DESCRIPTION Skip obj.Skip(NoOfCha r) Skipa specified number of characters from a TextStream file SkipLine obj.SkipLine Skips an entire line (up to, but not including, the newline character) from a TextStream file
- 14. Property Description AtEndOfLine Returnstrue if the file pointer is positioned immediately before the end-of-line marker in a TextStream file, and false if not AtEndOfStream Returns true if the file pointer is at the end of a TextStream file, and false if not Column Returns the column number of the current character position in an input stream Line Returns the current line number in a TextStream file
- 15. <% dim fs,f,t,x setfs=Server.CreateObject("Scripting.FileSystemObject") set f=fs.CreateTextFile("c:test.txt") f.write("Hello World!") f.Close set t=fs.OpenTextFile("c:test.txt",1,false) do while t.AtEndOfLine<>true x=t.Read(1) loop t.close Response.Write("The last character is: " & x) %> Output: The last character of the first line in the text file is: !