Excel 鏈接字符串sql
string xlsConnFormat = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source='{0}';Extended Properties='Excel 8.0;HDR=NO;IMEX=1';";
一、HDR表示要把第一行做爲數據仍是做爲列名,做爲數據用HDR=NO,做爲列名用HDR=YES;數據庫
二、經過IMEX=1來把混合型做爲文本型讀取,避免null值。ide
注意:把一個 Excel 文件看作一個數據庫,一個sheet看作一張表。語法 "SELECT * FROM [sheet1$]",表單要使用"[]"和"$"。sqlserver
使用 OLEDB 讀取不一樣版本 Excel 數據的鏈接字符串設置ui
用OLEDB經過設置鏈接字符串能夠像讀取sqlserver同樣將excel中的數據讀取出來,可是excel2003和excel2007/2010的鏈接字符串是不一樣的 。spa
/// <summary> /// 把數據從Excel裝載到DataTable /// </summary> /// <param name="pathName">帶路徑的Excel文件名</param> /// <param name="sheetName">工做表名</param> /// <param name="tbContainer">將數據存入的DataTable</param> /// <returns></returns> public DataTable ExcelToDataTable(string pathName, string sheetName) { DataTable tbContainer = new DataTable(); string strConn = string.Empty; if (string.IsNullOrEmpty(sheetName)) { sheetName = "Sheet1"; } FileInfo file = new FileInfo(pathName); if (!file.Exists) { throw new Exception("文件不存在"); } string extension = file.Extension; switch (extension) { case ".xls": strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + pathName + ";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'"; break; case ".xlsx": strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + pathName + ";Extended Properties='Excel 12.0;HDR=Yes;IMEX=1;'"; break; default: strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + pathName + ";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'"; break; } //連接Excel OleDbConnection cnnxls = new OleDbConnection(strConn); //讀取Excel裏面有 表Sheet1 OleDbDataAdapter oda = new OleDbDataAdapter(string.Format("select * from [{0}$]", sheetName), cnnxls); DataSet ds = new DataSet(); //將Excel裏面有表內容裝載到內存表中! oda.Fill(tbContainer); return tbContainer; }
讀取Excel文件時,可能一個文件中會有多個Sheet,所以獲取Sheet的名稱是很是有用的。excel
//根據Excel物理路徑獲取Excel文件中全部表名 public static String[] GetExcelSheetNames(string excelFile) { OleDbConnection objConn = null; System.Data.DataTable dt = null; try { //string strConn = "Provider=Microsoft.Jet.OleDb.4.0;" + "data source=" + excelFile + ";Extended Properties='Excel 8.0; HDR=NO; IMEX=1'"; //此鏈接只能操做Excel2007以前(.xls)文件 string strConn = "Provider=Microsoft.Ace.OleDb.12.0;" + "data source=" + excelFile + ";Extended Properties='Excel 12.0; HDR=NO; IMEX=1'"; //此鏈接能夠操做.xls與.xlsx文件 objConn = new OleDbConnection(strConn); objConn.Open(); dt = objConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null); if (dt == null) { return null; } String[] excelSheets = new String[dt.Rows.Count]; int i = 0; foreach (DataRow row in dt.Rows) { excelSheets[i] = row["TABLE_NAME"].ToString(); i++; } return excelSheets; } catch { return null; } finally { if (objConn != null) { objConn.Close(); objConn.Dispose(); } if (dt != null) { dt.Dispose(); } } }