由于經常用到文件處理，便自己封裝了下 分享給大家。 包含寫入文本 批量刪除文件 下載文件 。--可直接使用
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
/// <summary>/// 寫入到txt/// </summary>/// <param name="savePath"></param>/// <param name="content"></param>public static void WriteInTxt(string savePath, string content){string tempPath = System.IO.Path.GetDirectoryName(savePath);System.IO.Directory.CreateDirectory(tempPath); //創建臨時文件目錄if (!System.IO.File.Exists(savePath)){FileStream fs1 = new FileStream(savePath, FileMode.Create, FileAccess.Write);//創建寫入文件 StreamWriter sw = new StreamWriter(fs1);sw.WriteLine(content);//開始寫入值sw.Close();fs1.Close();}else{FileStream fs = new FileStream(savePath, FileMode.Open, FileAccess.Write);StreamWriter sr = new StreamWriter(fs);sr.WriteLine(content);//開始寫入值sr.Close();fs.Close();}}/// <summary>/// 遞歸刪除文件夾下所有文件/// </summary>/// <param name="file"></param>public static void DeleteFile(string dirPath){try{//去除文件夾和子文件的只讀屬性//去除文件夾的只讀屬性System.IO.DirectoryInfo fileInfo = new DirectoryInfo(dirPath);fileInfo.Attributes = FileAttributes.Normal & FileAttributes.Directory;//去除文件的只讀屬性System.IO.File.SetAttributes(dirPath, System.IO.FileAttributes.Normal);//判斷文件夾是否還存在if (Directory.Exists(dirPath)){foreach (string f in Directory.GetFileSystemEntries(dirPath)){if (File.Exists(f)){//如果有子文件刪除文件File.Delete(f);}else{//循環遞歸刪除子文件夾 DeleteFile(f);}}//刪除空文件夾 Directory.Delete(dirPath);}}catch (Exception e){}}/// <summary>/// Http下載文件/// </summary>/// <param name="url">下載文件路徑</param>/// <param name="savePath">保存路徑</param>/// <returns></returns>public static bool HttpDownloadFile(string url, string savePath){string tempPath = System.IO.Path.GetDirectoryName(savePath);System.IO.Directory.CreateDirectory(tempPath); //創建臨時文件目錄string tempFile = tempPath + @"\" + System.IO.Path.GetFileName(savePath); //臨時文件if (System.IO.File.Exists(tempFile)){//存在則跳出return true;//System.IO.File.Delete(tempFile); }try{FileStream fs = new FileStream(tempFile, FileMode.Append, FileAccess.Write, FileShare.ReadWrite);// 設置參數HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;//發送請求并獲取相應回應數據HttpWebResponse response = request.GetResponse() as HttpWebResponse;//直到request.GetResponse()程序才開始向目標網頁發送Post請求Stream responseStream = response.GetResponseStream();//創建本地文件寫入流//Stream stream = new FileStream(tempFile, FileMode.Create);byte[] bArr = new byte[1024];int size = responseStream.Read(bArr, 0, (int)bArr.Length);while (size > 0){//stream.Write(bArr, 0, size);fs.Write(bArr, 0, size);size = responseStream.Read(bArr, 0, (int)bArr.Length);}//stream.Close();fs.Close();responseStream.Close();System.IO.File.Move(tempFile, savePath);return true;}catch (Exception ex){return false;}} |
以上這篇C# 下載文件 刪除文件 寫入文本的實例就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持服務器之家。
原文鏈接：http://www.cnblogs.com/MVC1013/archive/2017/12/12/8030364.html
