1 /// <summary> 2 /// 将DataTable中数据写入到CSV文件中 3 /// </summary> 4 /// <param name="dt">提供保存数据的DataTable</param> 5 /// <param name="fileName">CSV的文件路径</param> 6 public static void SaveCSV(DataTable dt) 7 { 8 SaveFileDialog objSFD = new SaveFileDialog() { DefaultExt = "csv", Filter = "CSV Files (*.csv)|*.csv|Excel XML (*.xml)|*.xml|All files (*.*)|*.*", FilterIndex = 1 }; 9 if (objSFD.ShowDialog() == true) 10 { 11 string strFormat = objSFD.FileName; 12 FileInfo fi = new FileInfo(strFormat); 13 if (!fi.Directory.Exists) 14 { 15 fi.Directory.Create(); 16 } 17 FileStream fs = new FileStream(strFormat, System.IO.FileMode.Create, System.IO.FileAccess.Write); 18 //StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.Default); 19 StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.UTF8); 20 string data = ""; 21 //写出列名称 22 for (int i = 0; i < dt.Columns.Count; i++) 23 { 24 data += dt.Columns[i].ColumnName.ToString(); 25 if (i < dt.Columns.Count - 1) 26 { 27 data += ","; 28 } 29 } 30 sw.WriteLine(data); 31 //写出各行数据 32 for (int i = 0; i < dt.Rows.Count; i++) 33 { 34 data = ""; 35 for (int j = 0; j < dt.Columns.Count; j++) 36 { 37 string str = dt.Rows[i][j].ToString(); 38 str = str.Replace(""", """");//替换英文冒号 英文冒号需要换成两个冒号 39 if (str.Contains(',') || str.Contains('"') 40 || str.Contains(' ') || str.Contains(' ')) //含逗号 冒号 换行符的需要放到引号中 41 { 42 str = string.Format(""{0}"", str); 43 } 44 45 data += str; 46 if (j < dt.Columns.Count - 1) 47 { 48 data += ","; 49 } 50 } 51 sw.WriteLine(data); 52 } 53 sw.Close(); 54 fs.Close(); 55 56 } 57 58 }
1 /// <summary> 2 /// 将CSV文件的数据读取到DataTable中 3 /// </summary> 4 /// <param name="fileName">CSV文件路径</param> 5 /// <returns>返回读取了CSV数据的DataTable</returns> 6 public static DataTable OpenCSV(string filePath) 7 { 8 Encoding encoding = Common.GetType(filePath); //Encoding.ASCII;// 9 DataTable dt = new DataTable(); 10 FileStream fs = new FileStream(filePath, System.IO.FileMode.Open, System.IO.FileAccess.Read); 11 12 //StreamReader sr = new StreamReader(fs, Encoding.UTF8); 13 StreamReader sr = new StreamReader(fs, encoding); 14 //string fileContent = sr.ReadToEnd(); 15 //encoding = sr.CurrentEncoding; 16 //记录每次读取的一行记录 17 string strLine = ""; 18 //记录每行记录中的各字段内容 19 string[] aryLine = null; 20 string[] tableHead = null; 21 //标示列数 22 int columnCount = 0; 23 //标示是否是读取的第一行 24 bool IsFirst = true; 25 //逐行读取CSV中的数据 26 while ((strLine = sr.ReadLine()) != null) 27 { 28 //strLine = Common.ConvertStringUTF8(strLine, encoding); 29 //strLine = Common.ConvertStringUTF8(strLine); 30 31 if (IsFirst == true) 32 { 33 tableHead = strLine.Split(','); 34 IsFirst = false; 35 columnCount = tableHead.Length; 36 //创建列 37 for (int i = 0; i < columnCount; i++) 38 { 39 DataColumn dc = new DataColumn(tableHead[i]); 40 dt.Columns.Add(dc); 41 } 42 } 43 else 44 { 45 aryLine = strLine.Split(','); 46 DataRow dr = dt.NewRow(); 47 for (int j = 0; j < columnCount; j++) 48 { 49 dr[j] = aryLine[j]; 50 } 51 dt.Rows.Add(dr); 52 } 53 } 54 if (aryLine != null && aryLine.Length > 0) 55 { 56 dt.DefaultView.Sort = tableHead[0] + " " + "asc"; 57 } 58 59 sr.Close(); 60 fs.Close(); 61 return dt; 62 } 63 }
找了好多只有这个好用 ================================================================
================================================================================================================================转自https://www.cnblogs.com/Clin/archive/2013/03/14/2959022.html===================
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