C # file writing methods

C # Write File processing operations are involved in many development projects. What is the specific implementation method? Here we will introduce you to the three methods, hoping to inspire you in developing applications.

First, the C # Write File processing operation must first be imported into the namespace: using System. IO;

 

C # file write Method 1: Use FileStream

1. // Instantiate a save file dialog box
2. SaveFileDialog sf =NewSaveFileDialog ();
3. // Set the file storage type
4. Sf. Filter = "txt file | *. txt | all files | *.*";
5. // If the user does not enter the extension, the suffix is automatically appended.
6. Sf. AddExtension =True;
7. // Set the title
8. Sf. Title = "Writing Files ";
9. // If the user clicks the Save button
10. If(Sf. ShowDialog () = DialogResult. OK)
11. {
12. // Instantiate a file stream ---> associated with the written file
13. FileStream fs =NewFileStream (sf. FileName, FileMode. Create );
14. // Obtain the byte array
15. Byte[] Data =NewUTF8Encoding (). GetBytes (This. TextBox1.Text );
16. // Start writing
17. Fs. Write (data, 0, data. Length );
18. // Clear the buffer and close the stream
19. Fs. Flush ();
20. Fs. Close ();
21.  
22. }

C # file Writing Method 2: Using StreamWriter

1. // Instantiate a save file dialog box
2. SaveFileDialog sf =NewSaveFileDialog ();
3. // Set the file storage type
4. Sf. Filter = "txt file | *. txt | all files | *.*";
5. // If the user does not enter the extension, the suffix is automatically appended.
6. Sf. AddExtension =True;
7. // Set the title
8. Sf. Title = "Writing Files ";
9. // If the user clicks the Save button
10. If(Sf. ShowDialog () = DialogResult. OK)
11. {
12. // Instantiate a file stream ---> associated with the written file
13. FileStream fs =NewFileStream (sf. FileName, FileMode. Create );
14. // Instantiate a StreamWriter --> associated with fs
15. StreamWriter sw =NewStreamWriter (fs );
16. // Start writing
17. Sw. Write (This. TextBox1.Text );
18. // Clear the buffer
19. Sw. Flush ();
20. // Close the stream
21. Sw. Close ();
22. Fs. Close ();
23. }
24.  

C # file Writing Method 3: BinaryWriter

1. // Instantiate a save file dialog box
2. SaveFileDialog sf =NewSaveFileDialog ();
3. // Set the file storage type
4. Sf. Filter = "txt file | *. txt | all files | *.*";
5. // If the user does not enter the extension, the suffix is automatically appended.
6. Sf. AddExtension =True;
7. // Set the title
8. Sf. Title = "Writing Files ";
9. // If the user clicks the Save button
10. If(Sf. ShowDialog () = DialogResult. OK)
11. {
12. // Instantiate a file stream ---> associated with the written file
13. FileStream fs =
14. NewFileStream (sf. FileName, FileMode. Create );
15. // Instantiate BinaryWriter
16. BinaryWriter bw =NewBinaryWriter (fs );
17. Bw. Write (This. TextBox1.Text );
18. // Clear the buffer
19. Bw. Flush ();
20. // Close the stream
21. Bw. Close ();
22. Fs. Close ();
23. }

 

 

In addition, it is also available when adding content at the end of a text file:

System. IO. File. AppendAllText (FileName, contents, Encoding );

For richTextBox, you can load and save files as follows:

RichTextBox1.LoadFile (FileName, RichTextBoxStreamType. PlainText); richTextBox1.SaveFile (FileName, RichTextBoxStreamType. PlainText );