Check file if exist c#

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Introduction This article shows the File. Exists method from C. IO namespace. Existing method is a specific file that exists in c there are several ways of testing file existence.

Exists is the easiest. It is the simplest way of checking that the file exists. It returns true or false in the file. Boolean This method used to Day and night are parts of a Boolean condition. The day is true it has a light and night is false. This can be stored in a bool variable in file Existing Method The True Condition, if the caller has the required permissions and path, contains the name of an existing file; otherwise, false. This method also returns false if the path is null, an invalid path, or a zero-length string.

If the caller does not have sufficient permissions to read the specified file, no exception is thrown and the method returns false regardless of the existence of path in a Boolean statement. WriteLine File. And Passing an invalid path to Exists returns false. To check whether the path contains any invalid characters, you can call the GetInvalidPathChars method to retrieve the characters that are invalid for the file system. You can also create a regular expression to test the whether the path is valid for your environment.

For examples of acceptable paths, see File. To check if a directory exists, see Directory. Be aware that another process can potentially do something with the file in between the time you call the Exists method and perform another operation on the file, such as Delete. The path parameter is permitted to specify relative or absolute path information. Relative path information is interpreted as relative to the current working directory.

To obtain the current working directory, see GetCurrentDirectory.