直接上方法：

1         /// 
 2         /// 将DataTable转换成CSV文件 3         /// 
 4         /// DataTable 5         /// 文件路径 6         public static void SaveCSV(DataTable dt, string filePath) 7         { 8             FileStream fs = new FileStream(filePath + dt.TableName + ".csv", System.IO.FileMode.Create, System.IO.FileAccess.Write); 9             StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.Default);10             string data = "";11 12             //写出列名称13             for (int i = 0; i < dt.Columns.Count; i++)14             {15                 data += dt.Columns[i].ColumnName.ToString();16                 if (i < dt.Columns.Count - 1)17                 {18                     data += ",";19                 }20             }21             sw.WriteLine(data);22 23             //写出各行数据24             for (int i = 0; i < dt.Rows.Count; i++)25             {26                 data = "";27                 for (int j = 0; j < dt.Columns.Count; j++)28                 {29                     data += dt.Rows[i][j].ToString();30                     if (j < dt.Columns.Count - 1)31                     {32                         data += ",";33                     }34                 }35                 sw.WriteLine(data);36             }37             sw.Close();38             fs.Close();39         }