方法一:采用OleDB读取EXCEL文件
把EXCEL文件当做一个数据源来进行数据的读取操作,实例如下:
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| public DataSet ExcelToDS(string Path) { string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" +"Data Source="+ Path +";"+"Extended Properties=Excel 8.0;"; OleDbConnection conn = new OleDbConnection(strConn); conn.Open(); string strExcel = ""; OleDbDataAdapter myCommand = null; DataSet ds = null; strExcel="select * from [sheet1$]"; myCommand = new OleDbDataAdapter(strExcel, strConn); ds = new DataSet(); myCommand.Fill(ds,"table1"); return ds; }
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对于EXCEL中的表即sheet([sheet1$])如果不是固定的可以使用下面的方法得到
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| string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" +"Data Source="+ Path +";"+"Extended Properties=Excel 8.0;"; OleDbConnection conn = new OleDbConnection(strConn); DataTable schemaTable = objConn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables,null); string tableName=schemaTable.Rows[0][2].ToString().Trim();
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另外:也可进行写入EXCEL文件,实例如下:
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| public void DSToExcel(string Path,DataSet oldds) { Data Source ="+path1+";Extended Properties=Excel 8.0"; OleDbConnection myConn = new OleDbConnection(strCon); string strCom="select * from [Sheet1$]"; myConn.Open(); OleDbDataAdapter myCommand = new OleDbDataAdapter ( strCom, myConn ); ystem.Data.OleDb.OleDbCommandBuilder builder=new OleDbCommandBuilder(myCommand); //QuotePrefix和QuoteSuffix主要是对builder生成InsertComment命令时使用。 builder.QuotePrefix="["; //获取insert语句中保留字符(起始位置) builder.QuoteSuffix="]"; //获取insert语句中保留字符(结束位置) DataSet newds=new DataSet(); myCommand.Fill(newds ,"Table1") ; for(int i=0;i<oldds.Tables[0].Rows.Count;i++) { //在这里不能使用ImportRow方法将一行导入到news中,因为ImportRow将保留原来DataRow的所有设置(DataRowState状态不变)。 // 在使用ImportRow后newds内有值,但不能更新到Excel中因为所有导入行的DataRowState!=Added DataRow nrow=aDataSet.Tables["Table1"].NewRow(); for(int j=0;j<newds.Tables[0].Columns.Count;j++){ nrow[j]=oldds.Tables[0].Rows[i][j]; } newds.Tables["Table1"].Rows.Add(nrow); } myCommand.Update(newds,"Table1"); myConn.Close(); }
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方法二:引用的com组件:Microsoft.Office.Interop.Excel.dll读取EXCEL文件
首先是Excel.dll的获取,将Office安装目录下的Excel.exe文件Copy到DotNet的bin目录下,cmd到该目录下,运行 TlbImp EXCEL.EXE Excel.dll 得到Dll文件。 再在项目中添加引用该dll文件.
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| Application excel = new Application(); if (excel == null){ Response.Write("<script>alert('Can't access excel')</script>"); } else{ excel.Visible = false; excel.UserControl = true; Workbook wb = excel.Application.Workbooks.Open(strFileName, missing, true, missing, missing, missing, missing, missing, missing, true, missing, missing, missing, missing, missing); Worksheet ws = (Worksheet)wb.Worksheets.get_Item(1); int rowsint = ws.UsedRange.Cells.Rows.Count; Range rng1 = ws.Cells.get_Range("B2", "B" + rowsint); Range rng2 = ws.Cells.get_Range("K2", "K" + rowsint); object[,] arryItem= (object[,])rng1.Value2; object[,] arryCus = (object[,])rng2.Value2; string[,] arry = new string[rowsint-1, 2]; for (int i = 1; i <= rowsint-1; i++){ arry[i - 1, 0] =arryItem[i, 1].ToString(); arry[i - 1, 1] = arryCus[i, 1].ToString(); } Response.Write(arry[0, 0] + " / " + arry[0, 1] + "#" + arry[rowsint - 2, 0] + " / " + arry[rowsint - 2, 1]); } excel.Quit(); excel = null; Process[] procs = Process.GetProcessesByName("excel"); foreach (Process pro in procs){ pro.Kill(); } GC.Collect(); }
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方法三:将EXCEL文件转化成CSV(逗号分隔)的文件,用文件流读取(等价就是读取一个txt文本文件)。
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| 先引用命名空间:using System.Text;和using System.IO; FileStream fs = new FileStream("d:\\Customer.csv", FileMode.Open, FileAccess.Read, FileShare.None); StreamReader sr = new StreamReader(fs, System.Text.Encoding.GetEncoding(936)); string str = "";string s = Console.ReadLine();while (str != null){ str = sr.ReadLine(); string[] xu = new String[2]; xu = str.Split(','); string ser = xu[0]; string dse = xu[1]; if (ser == s){ Console.WriteLine(dse);break; } } sr.Close();
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另外也可以将数据库数据导入到一个txt文件,实例如下:
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| OleDbConnection con = new OleDbConnection(conStr); con.Open();string sql = "select ITEM,REQD_DATE,QTY,PUR_FLG,PO_NUM from TSD_PO014"; OleDbDataAdapter oda = new OleDbDataAdapter(sql, con); oda.Fill(ds, "PO014"); DataTable dt = ds.Tables[0]; FileStream fs = new FileStream(Server.MapPath("download/" + fn), FileMode.Create, FileAccess.ReadWrite); StreamWriter strmWriter = new StreamWriter(fs); foreach (DataRow dr in dt.Rows){ string str0, str1, str2, str3; string str = "|"; str0 = dr[0].ToString(); str1 = dr[1].ToString(); str2 = dr[2].ToString(); str3 = dr[3].ToString(); str4 = dr[4].ToString().Trim(); strmWriter.Write(str0); strmWriter.Write(str); strmWriter.Write(str1); strmWriter.Write(str); strmWriter.Write(str2); strmWriter.Write(str); strmWriter.Write(str3); strmWriter.WriteLine(); strmWriter.Flush(); strmWriter.Close();if (con.State == ConnectionState.Open){ con.Close(); }
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以上就是C#读取Excel文件的三种方法,希望对大家有所帮助。