EXISTS Function (File)
Determines whether a file exists.
Syntax
[Ok :=] EXISTS(Name)
Parameters
Name
Type: Text or code
The name of the file that you want to check. This includes the path. When you enter the path, consider these shortcuts:
You can omit the drive designation if the file is located on the current drive.
You can omit the full path if the file is located in the current directory.
You can enter only the subdirectory name if the file is located in a subdirectory of the current directory.
Property Value/Return Value
Type: Boolean
This return value shows whether the file exists.
true if the file exists; otherwise, false.
Example
The following example uses the EXISTS function to determine whether the specified file exists. If the file exists, then the WRITEMODE Function (File) allows the file to be open for writing. The OPEN Function (File) opens the file, the WRITE Function (File) writes the text “Hello World” to the file, and then the CLOSE Function (File) function closes the file. If the file does not exist, an error message is displayed. This example requires that you create the following variables in the C/AL Globals window. This example assumes that you have created the following file C:\TestFolder\TestFile2.txt.
| Variable name | DataType |
|---|---|
| FileName | Text |
| TestFile | File |
FileName := 'C:\TestFolder\TestFile2.txt';
IF EXISTS(FileName) THEN BEGIN
TestFile.WRITEMODE(TRUE);
TestFile.OPEN(FileName);
TestFile.WRITE('Hello World');
TestFile.CLOSE;
END
ELSE
MESSAGE('%1 does not exist.', FileName);