1.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：- 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$]";
- myCommand = new OleDbDataAdapter(strExcel, strConn);
- ds = new DataSet();
- myCommand.Fill(ds,"table1");
- return ds;
- }
复制代码 - string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" +"Data Source="+ Path +";"+"Extended Properties=Excel 8.0;";
- OleDbConnection conn = new OleDbConnection(strConn);
- DataTable schemaTable = objConn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables,null);
- string tableName=schemaTable.Rows[0][2].ToString().Trim();
复制代码 - public void DSToExcel(string Path,DataSet oldds)
- {
- //先得到汇总EXCEL的DataSet 主要目的是获得EXCEL在DataSet中的结构
- string strCon = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source ="+path1+";Extended Properties=Excel 8.0" ;
- OleDbConnection myConn = new OleDbConnection(strCon) ;
- string strCom="select * from [Sheet1$]";
- 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();
复制代码
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.- //读取EXCEL的方法 (用范围区域读取数据)
- private void OpenExcel(string strFileName)
- {
- object missing = System.Reflection.Missing.Value;
- Application excel = new Application();//lauch excel application
- if (excel == null)
- {
- Response.Write("<script>alert('Can't access excel')</script>");
- }
- else
- {
- excel.Visible = false; excel.UserControl = true;
- // 以只读的形式打开EXCEL文件
- Workbook wb = excel.Application.Workbooks.Open(strFileName, missing, true, missing, missing, missing,
- missing, missing, missing, true, missing, missing, missing, missing, missing);
- //取得第一个工作薄
- Worksheet ws = (Worksheet)wb.Worksheets.get_Item(1);
- //取得总记录行数 (包括标题列)
- int rowsint = ws.UsedRange.Cells.Rows.Count; //得到行数
- //int columnsint = mySheet.UsedRange.Cells.Columns.Count;//得到列数
- //取得数据范围区域 (不包括标题列)
- Range rng1 = ws.Cells.get_Range("B2", "B" + rowsint); //item
- Range rng2 = ws.Cells.get_Range("K2", "K" + rowsint); //Customer
- object[,] arryItem= (object[,])rng1.Value2; //get range's value
- object[,] arryCus = (object[,])rng2.Value2;
- //将新值赋给一个数组
- string[,] arry = new string[rowsint-1, 2];
- for (int i = 1; i <= rowsint-1; i++)
- {
- //Item_Code列
- arry[i - 1, 0] =arryItem[i, 1].ToString();
- //Customer_Name列
- 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();//没有更好的方法,只有杀掉进程
- }
- GC.Collect();
- }
复制代码 - 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();
复制代码 - //txt文件名
- string fn = DateTime.Now.ToString("yyyyMMddHHmmss") + "-" + "PO014" + ".txt";
- OleDbConnection con = new OleDbConnection(conStr);
- con.Open();
- string sql = "select ITEM,REQD_DATE,QTY,PUR_FLG,PO_NUM from TSD_PO014";
- //OleDbCommand mycom = new OleDbCommand("select * from TSD_PO014", mycon);
- //OleDbDataReader myreader = mycom.ExecuteReader(); //也可以用Reader读取数据
- DataSet ds = new DataSet();
- 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); //存入到文本文件中
- //把标题写入.txt文件中
- //for (int i = 0; i <dt.Columns.Count;i++)
- //{
- // strmWriter.Write(dt.Columns[i].ColumnName + " ");
- //}
-
- foreach (DataRow dr in dt.Rows)
- {
- string str0, str1, str2, str3;
- string str = "|"; //数据用"|"分隔开
- 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(); //换行
- }
- strmWriter.Flush();
- strmWriter.Close();
- if (con.State == ConnectionState.Open)
- {
- con.Close();
- }
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