Javascript writing txt and reading txt file example_javascript skills

1. Write

FileSystemObject to translate the file into a file stream.

Step one:

Example:

Copy code The code is as follows:

Var fso=new ActiveXObject(Scripting.FileSystemObject);

Creates an object that can translate a file into a file stream.

Step 2: Used to create a textStream object

There are three attributes in the brackets

1. The absolute path of the file

2. The constant of the file Read only=1, write only=2, append=8 and other permissions. (ForReading, ForWriting or ForAppending.);

3. A Boolean value is true if new creation is allowed, otherwise false;

Example:

Copy code The code is as follows:

Var f=fso.createtextfile(“C:a.txt”,2,true);

Step 3: Call the textStream method

1. Write (without adding a new line break at the end of the written data)

2. WriteLine (to add a new line break at the end) )

3. WriteBlankLines (add one or more blank lines)

Example:

Copy code The code is as follows:

f.writeLine(“wo shi di yi hang”);

Step 4:

Close the textStream object :

Example: f.close();

2. Reading

Step 1:

Copy the code The code is as follows:

Var fso=new ActiveXObject(Scripting.FileSystemObject);

Create a file that can be translated into File stream object.

Step 2: Used to create a textStream object

There are three attributes in the brackets

4. The absolute path of the file

5. The constants of the file Read only=1, write only=2, append=8 and other permissions. (ForReading, ForWriting or ForAppending.);

6. A Boolean value is true if new creation is allowed, otherwise false;

Example:

Copy code The code is as follows:

Var f=fso.opentextfile(“C:a.txt”,1,true);

Step 3: Call the read method

1. Read (used to read the specified number of characters in the file)

2. ReadLine (read a whole line, but Excluding line breaks)

3. ReadAll (read the entire content of the text file);

Determine whether the last line has been read

Copy code The code is as follows:

while (!f.AtEndOfStream)
{
f.Readline();
}

Step 4:

Close textStream object:

Example: f.close();

The following is an html to open a txt file Example.

Copy code The code is as follows:

.org/1999/xhtml">