C # create a file in winform, write the value to the file, read the value in the file, modify the file value, create, write, and modify the file

1. # Region: determines whether a file exists. If the file does not exist, it is created. Otherwise, the read value is displayed in the form.
3. PublicFormmain ()
4. {
5. Initializecomponent ();
7. // Readfile (application. startuppath + "// alarmset.txt ");
9. // Determine whether a file exists
10. // System. Io. directoryinfo info = new system. Io. directoryinfo (application. startuppath + "// alarmset.txt ");
11. // MessageBox. Show (info. exists. tostring ());
13. // MessageBox. Show (application. startuppath + "// alarmset.txt ");
15. // Determine whether a file exists
16. If(! File. exists (application. startuppath + "// alarmset.txt "))
17. {
18. // File. Create (application. startuppath + "// alarmset.txt"); // create the file
20. Filestream fs1 =NewFilestream (application. startuppath + "// alarmset.txt", filemode. Create, fileaccess. Write); // create a Write File
21. Streamwriter Sw =NewStreamwriter (fs1 );
22. Sw. writeline ("[runtype]"); // start to write the value
23. Sw. writeline ("type = 1 ");
25. Sw. writeline ("/R/N ");
27. Sw. writeline ("-- alarm setting ppws number board matching bits ppwz matching position 0 First Matching 1 then matching ");
28. Sw. writeline ("[alarm]");
29. Sw. writeline ("ppwz = 0 ");
30. Sw. writeline ("ppws = 8 ");
32. Sw. writeline ("/R/N ");
34. Sw. writeline ("[server]");
35. Sw. writeline ("listenport = 2005 ");
37. Sw. writeline ("/R/N ");
39. Sw. writeline ("[Form]");
40. Sw. writeline ("ppwz = 0 ");
42. Sw. Close ();
43. Fs1.close ();
45. }
47. // Read the file value and display it to the form
48. Filestream FS =NewFilestream (application. startuppath + "// alarmset.txt", filemode. Open, fileaccess. readwrite );
49. Streamreader sr =NewStreamreader (FS );
50. StringLine = Sr. Readline ();
51. IntCurline = 0;
52. While(Line! =Null)
53. {
54. If(++ Curline = 7 & line. Equals ("ppwz = 0") // if the value of Row 3 of the file is ppwz = 0, set the match before selecting the single-choice button.
55. {
56. Radiobutton1.checked =True;
57. Radiobutton2.checked =False;
58. // MessageBox. Show ("before ");
59. }
60. Else If(Curline = 8 & line. Equals ("ppwz = 1") // when the value of row 8th is ppwz = 1, set the radio button to match
61. {
62. Radiobutton2.checked =True;
63. Radiobutton1.checked =False;
64. // MessageBox. Show (" ");
65. }
67. If(Curline = 8) // file 8th rows
68. {
69. Textbox1.text = line. substring (line. lastindexof ("=") + 1); // capture the value after =
70. }
72. // MessageBox. Show ("th" + (++ curline). tostring () + "row:" + line );
73. // Console. writeline ("th" + (++ curline). tostring () + "row:" + line );
74. Line = Sr. Readline ();
75. }
76. Sr. Close ();
77. FS. Close ();
78. }
79.  
80. # Endregion

Modify the file value

1. # Region: Click Save settings.
3. Private VoidButton6_click (ObjectSender, eventargs E)
4. {
5. If(Radiobutton1.checked =True)
6. {
7. Editfile (7, "ppwz = 0", application. startuppath + "// alarmset.txt ");
8. Editfile (8, "ppws =" + textbox1.text, application. startuppath + "// alarmset.txt ");
9. }
11. If(Radiobutton2.checked =True)
12. {
13. Editfile (7, "ppwz = 1", application. startuppath + "// alarmset.txt ");
14. Editfile (8, "ppws =" + textbox1.text, application. startuppath + "// alarmset.txt ");
15. }
16. }
17.  
18. # Endregion
19.  
20.  
21. # Match region settings
23. Public Static VoidEditfile (IntCurline,StringNewlinevalue,StringPatch)
24. {
25. Filestream FS =NewFilestream (patch, filemode. Open, fileaccess. Read );
26. Streamreader sr =NewStreamreader (FS, encoding. getencoding ("UTF-8"); // solves the garbled characters in the written files.
27. StringLine = Sr. Readline ();
28. Stringbuilder sb =NewStringbuilder ();
29. For(IntI = 1; line! =Null; I ++)
30. {
31. SB. append (LINE + "/R/N ");
32. If(I! = Curline-1)
33. Line = Sr. Readline ();
34. Else
35. {
36. Sr. Readline ();
37. Line = newlinevalue;
38. }
39. }
40. Sr. Close ();
41. FS. Close ();
42. Filestream fs1 =NewFilestream (patch, filemode. Open, fileaccess. Write );
43. Streamwriter Sw =NewStreamwriter (fs1 );
44. Sw. Write (sb. tostring ());
45. Sw. Close ();
46. FS. Close ();
47. }
48.  
49. # Endregion