C#中将DataTable中数据导出到csv文件中
2016-10-11 12:38
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protected void Button1_Click(object sender, EventArgs e) { DataTable dt = new DataTable(); dt.Columns.Add("test1"); dt.Columns.Add("test2"); dt.Columns.Add("test3"); dt.Columns.Add("test4"); dt.Columns.Add("test5"); for (int i = 0; i < 6; i++) { dt.Rows.Add(); dt.Rows[i][0] = "CN"+i.ToString(); dt.Rows[i][1] = "EN"+i.ToString(); dt.Rows[i][2] = "JN"+i.ToString(); dt.Rows[i][3] = "HK"+i.ToString(); dt.Rows[i][4] = "TW"+i.ToString(); } ExportDataGridToCSV(dt); } /// <summary> /// Export the data from datatable to CSV file /// </summary> /// <param name="grid"></param> public void ExportDataGridToCSV(DataTable dt) { string strFile = ""; string path = ""; //File info initialization strFile = "test"; strFile = strFile + DateTime.Now.ToString("yyyyMMddhhmmss"); strFile = strFile + ".csv"; path = Server.MapPath(strFile); System.IO.FileStream fs = new FileStream(path, System.IO.FileMode.Create, System.IO.FileAccess.Write); StreamWriter sw = new StreamWriter(fs, new System.Text.UnicodeEncoding()); //Tabel header for (int i = 0; i < dt.Columns.Count; i++) { sw.Write(dt.Columns[i].ColumnName); sw.Write("\t"); } sw.WriteLine(""); //Table body for (int i = 0; i < dt.Rows.Count; i++) { for (int j = 0; j < dt.Columns.Count; j++) { sw.Write(DelQuota(dt.Rows[i][j].ToString())); sw.Write("\t"); } sw.WriteLine(""); } sw.Flush(); sw.Close(); DownLoadFile(path); } private bool DownLoadFile(string _FileName) { try { System.IO.FileStream fs = System.IO.File.OpenRead(_FileName); byte[] FileData = new byte[fs.Length]; fs.Read(FileData, 0, (int)fs.Length); Response.Clear(); Response.AddHeader("Content-Type", "application/notepad"); string FileName = System.Web.HttpUtility.UrlEncode(System.Text.Encoding.UTF8.GetBytes(_FileName)); Response.AddHeader("Content-Disposition", "inline;filename=" + System.Convert.ToChar(34) + FileName + System.Convert.ToChar(34)); Response.AddHeader("Content-Length", fs.Length.ToString()); Response.BinaryWrite(FileData); fs.Close(); System.IO.File.Delete(_FileName); Response.Flush(); Response.End(); return true; } catch (Exception ex) { ex.Message.ToString(); return false; } } /// <summary> /// Delete special symbol /// </summary> /// <param name="str"></param> /// <returns></returns> public string DelQuota(string str) { string result = str; string[] strQuota ={ "~", "!", "@", "#", "$", "%", "^", "&", "*", "(", ")", "`", ";", "'", ",", ".", "/", ":", "/,", "<", ">", "?" }; for (int i = 0; i < strQuota.Length; i++) { if (result.IndexOf(strQuota[i]) > -1) result = result.Replace(strQuota[i], ""); } return result; }
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