Privacy policy. If you are new to the. NET Framework, you will find that the object model for file operations in. You can still use the FileSystemObject in. NET requires that access to the object be through the Interop layer. NET generates a wrapper for the component for you if you want to use it.
Instead of declaring and using the addListItem function, you can use the following statement directly:. The following sample code uses a StreamReader class to read the System. The contents of the file are added to a ListBox control. The try There are many ways to determine when the end of the file is reached; this sample uses the Peek method to examine the next line before reading it. This sample code uses a StreamWriter class to create and write to a file. If you have an existing file, you can open it in the same way.
This sample code uses a FileInfo object to access a file's properties. 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, we can call the GetInvalidPathChars method to retrieve the characters that are invalid for the file system.
For examples of acceptable paths, see File. File Class The File Class is Provides static methods for the creation, copying, deletion, moving, and opening of a single file, and aids in the creation of FileStream objects.
Syntax [System. ComVisible true ] Public static class File Example The following example demonstrates how to use the File class to check whether a file exists in File class, and depending on the result, either create a new file and write to it or open the existing file and read from it. Using System; Using System. WriteLine "Hello" ; sw.
WriteLine "And" ; sw. Exists String Method The Directory. Exists is Determines whether the given path refers to an existing directory on disk. Syntax public static bool Exists string path ; Example.
View All. Check if a File Exists in C. Dinesh Beniwal Updated date Jan 07, Is there some way that I can check that the file is no longer in use, or make some stable way of waiting?
I already found a way to use Thread. Sleep TimeInMiliSec ; but I guess this is not a correct way of doing this more like a workaround solution? Start starts another process but it doesn't wait for that process to finish before continuing on.
This is a common problem. The solution is unfortunatley try to open it and see if there's an exception. Is there a way to check if a file is in use? Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Check if a file is in use, wait for it to finish Ask Question. Asked 9 years, 11 months ago. Active 6 years, 4 months ago. Viewed 12k times. I have this problem in my application: Step 1 - create an file xml and put some content in it Step 2 - a 3rd party application will open the file and get the info from the file made in step 1.
Step 3 - delete the file again. LoadXml ds. GetXml ; xmlDoc. Start startInfo ; Is my assumption correct that the last line only gets executed when the above is already done?
The second part where I get an error now is here: Process. Start startInfo ; File.
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