Create ;. CopyToAsync stream ;. In above code have create a guid and this guid i have used to replace with the uploaded file name before upload. In this we need to get the extension of the uploaded file and after getting extension we combine it and get the file name.
While preparing the upload path we have passed the renamed file name. Now we have done run the application and check the output.
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Privacy policy. Thank you. Microsoft makes no warranties, express or implied, with respect to the information provided here. Provides static methods for the creation, copying, deletion, moving, and opening of a single file, and aids in the creation of FileStream objects. The following example demonstrates how to use the File class to check whether a file exists, and depending on the result, either create a new file and write to it, or open the existing file and read from it.
Use the File class for typical operations such as copying, moving, renaming, creating, opening, deleting, and appending to a single file at a time. You can also use the File class to get and set file attributes or DateTime information related to the creation, access, and writing of a file. If you want to perform operations on multiple files, see Directory. GetFiles or DirectoryInfo. You can use these other types to further manipulate a file.
Because all File methods are static, it might be more efficient to use a File method rather than a corresponding FileInfo instance method if you want to perform only one action. All File methods require the path to the file that you are manipulating. The static methods of the File class perform security checks on all methods. If you are going to reuse an object several times, consider using the corresponding instance method of FileInfo instead, because the security check will not always be necessary.
The following table describes the enumerations that are used to customize the behavior of various File methods. In members that accept a path as an input string, that path must be well-formed or an exception is raised. For example, if a path is fully qualified but begins with a space, the path is not trimmed in methods of the class. Therefore, the path is malformed and an exception is raised.
Similarly, a path or a combination of paths cannot be fully qualified twice. Ensure that your paths are well-formed when using methods that accept a path string. In members that accept a path, the path can refer to a file or just a directory.
The specified path can also refer to a relative path or a Universal Naming Convention UNC path for a server and share name. For example, all the following are acceptable paths:. Appends lines to a file, and then closes the file. If the specified file does not exist, this method creates a file, writes the specified lines to the file, and then closes the file.
Appends lines to a file by using a specified encoding, and then closes the file. Asynchronously appends lines to a file, and then closes the file. Asynchronously appends lines to a file by using a specified encoding, and then closes the file. Opens a file, appends the specified string to the file, and then closes the file. If the file does not exist, this method creates a file, writes the specified string to the file, then closes the file.
Appends the specified string to the file using the specified encoding, creating the file if it does not already exist. Asynchronously opens a file or creates a file if it does not already exist, appends the specified string to the file, and then closes the file. Asynchronously opens a file or creates the file if it does not already exist, appends the specified string to the file using the specified encoding, and then closes the file.
Creates a StreamWriter that appends UTF-8 encoded text to an existing file, or to a new file if the specified file does not exist. Creates or overwrites a file in the specified path, specifying a buffer size and options that describe how to create or overwrite the file. Creates or overwrites a file in the specified path, specifying a buffer size, options that describe how to create or overwrite the file, and a value that determines the access control and audit security for the file.
Creates a file symbolic link identified by path that points to pathToTarget. Creates or opens a file for writing UTF-8 encoded text. If the file already exists, its contents are overwritten.
Decrypts a file that was encrypted by the current account using the Encrypt String method. Gets a FileSecurity object that encapsulates the access control list ACL entries for a specified file.
Gets a FileSecurity object that encapsulates the specified type of access control list ACL entries for a particular file. Gets the FileAttributes of the file on the path. Returns the creation date and time, in coordinated universal time UTC , of the specified file or directory.
Privacy policy. Thank you. Microsoft makes no warranties, express or implied, with respect to the information provided here. Gets the FileAttributes of the file on the path. The FileAttributes of the file on the path. NET Framework and. NET Core versions older than 2.
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