JavaScript write txt and read TXT file sample _javascript Tips

Source: Internet
Author: User
Tags readline
1. Write

FileSystemObject can translate files into a file stream.

First step:

Cases:
Copy Code code as follows:

Var fso=new ActiveXObject (Scripting.FileSystemObject);

Creates an object that can be translated into a file stream.

Step two: Use to create a TextStream object

There are three attributes inside the brackets

1. Absolute path to File

2. The constant number of files is read = 1 only, write = 2, append =8 and so on. (ForReading, ForWriting, or forappending.) );

3. A Boolean value allows the new to be true instead of false;

Cases:
Copy Code code as follows:

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

Step three: Call the TextStream method

1. Write (do not add a new line break at the end of the write data)

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

3. WriteBlankLines (add one or more blank lines)

Cases:
Copy Code code as follows:

F.writeline ("Wo shi di yi hang");

Fourth Step:

Close the TextStream object:

Example: F.close ();

2. Read

First step:
Copy Code code as follows:

Var fso=new ActiveXObject (Scripting.FileSystemObject);

Creates an object that can be translated into a file stream.

Step two: Use to create a TextStream object

There are three attributes inside the brackets

4. Absolute path to File

5. The constant number of files is read = 1 only, write = 2, append =8 and so on. (ForReading, ForWriting, or forappending.) );

6. A Boolean value allows the new to be true instead of false;

Cases:
Copy Code code as follows:

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

Step three: Invoke the Read method

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

2. ReadLine (reads an entire line, but does not include line breaks)

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

Determines whether to read to the last row
Copy Code code as follows:

while (!f.atendofstream)
{
F.readline ();
}

Fourth Step:

Close the TextStream object:

Example: F.close ();

The following is an example of an HTML open TXT file.
Copy Code code as follows:

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<meta http-equiv=" Content-type " Content= "text/html; Charset=utf-8 "/>
<title> Hello </title>

<body>
<div id=" AA "></div>

<script language=" JavaScript ">
var fso, TS, S;
var ForReading = 1;

FSO = new ActiveXObject ("Scripting.FileSystemObject");
ts = fso. OpenTextFile ("D:\\testfile.txt", ForReading);
s = ts. ReadLine ();
document.getElementById ("AA"). Innerhtml=s;
</script>

</body>
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