Wpf 导出CSV文件

  /// <summary>
         /// 将DataTable中数据写入到CSV文件中
         /// </summary>
         /// <param name="dt">提供保存数据的DataTable</param>
         /// <param name="fileName">CSV的文件路径</param>
         public static void SaveCSV(DataTable dt)
         {
             SaveFileDialog objSFD = new SaveFileDialog() { DefaultExt = "csv", Filter = "CSV Files (*.csv)|*.csv|Excel XML (*.xml)|*.xml|All files (*.*)|*.*", FilterIndex =  };
             if (objSFD.ShowDialog() == true)
             {
                 string strFormat = objSFD.FileName;
                 FileInfo fi = new FileInfo(strFormat);
                 if (!fi.Directory.Exists)
                 {
                     fi.Directory.Create();
                 }
                 FileStream fs = new FileStream(strFormat, System.IO.FileMode.Create, System.IO.FileAccess.Write);
                 //StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.Default);
                 StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.UTF8);
                 string data = "";
                 //写出列名称
                 for (int i = ; i < dt.Columns.Count; i++)
                 {
                     data += dt.Columns[i].ColumnName.ToString();
                     if (i < dt.Columns.Count - )
                     {
                         data += ",";
                     }
                 }
                 sw.WriteLine(data);
                 //写出各行数据
                 for (int i = ; i < dt.Rows.Count; i++)
                 {
                     data = "";
                     for (int j = ; j < dt.Columns.Count; j++)
                     {
                         string str = dt.Rows[i][j].ToString();
                         str = str.Replace("\"", "\"\"");//替换英文冒号 英文冒号需要换成两个冒号
                         if (str.Contains(',') || str.Contains('"')
                             || str.Contains('\r') || str.Contains('\n')) //含逗号 冒号 换行符的需要放到引号中
                         {
                             str = string.Format("\"{0}\"", str);
                         }

                         data += str;
                         if (j < dt.Columns.Count - )
                         {
                             data += ",";
                         }
                     }
                     sw.WriteLine(data);
                 }
                 sw.Close();
                 fs.Close();
                         }

         }

   /// <summary>
     /// 将CSV文件的数据读取到DataTable中
     /// </summary>
     /// <param name="fileName">CSV文件路径</param>
     /// <returns>返回读取了CSV数据的DataTable</returns>
     public static DataTable OpenCSV(string filePath)
     {
         Encoding encoding = Common.GetType(filePath); //Encoding.ASCII;//
         DataTable dt = new DataTable();
         FileStream fs = new FileStream(filePath, System.IO.FileMode.Open, System.IO.FileAccess.Read);

         //StreamReader sr = new StreamReader(fs, Encoding.UTF8);
         StreamReader sr = new StreamReader(fs, encoding);
         //string fileContent = sr.ReadToEnd();
         //encoding = sr.CurrentEncoding;
         //记录每次读取的一行记录
         string strLine = "";
         //记录每行记录中的各字段内容
         string[] aryLine = null;
         string[] tableHead = null;
         //标示列数
         int columnCount = ;
         //标示是否是读取的第一行
         bool IsFirst = true;
         //逐行读取CSV中的数据
         while ((strLine = sr.ReadLine()) != null)
         {
             //strLine = Common.ConvertStringUTF8(strLine, encoding);
             //strLine = Common.ConvertStringUTF8(strLine);

             if (IsFirst == true)
             {
                 tableHead = strLine.Split(',');
                 IsFirst = false;
                 columnCount = tableHead.Length;
                 //创建列
                 for (int i = ; i < columnCount; i++)
                 {
                     DataColumn dc = new DataColumn(tableHead[i]);
                     dt.Columns.Add(dc);
                 }
             }
             else
             {
                 aryLine = strLine.Split(',');
                 DataRow dr = dt.NewRow();
                 for (int j = ; j < columnCount; j++)
                 {
                     dr[j] = aryLine[j];
                 }
                 dt.Rows.Add(dr);
             }
         }
         if (aryLine != null && aryLine.Length > )
         {
             dt.DefaultView.Sort = tableHead[] + " " + "asc";
         }

         sr.Close();
         fs.Close();
         return dt;
     }
 }

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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