Excel与DataGridView - ASP.NET Excel数据导入功能
转自: http://blog.csdn.net/lpy1016lc/article/details/13275415
- C# winform Excel 数据导入
class ExcelCtrl { #region 将DataGridView控件中数据导出到Excel /// <summary> /// 将DataGridView控件中数据导出到Excel /// </summary> /// <param name="gridView">DataGridView对象</param> /// <param name="isShowExcle">是否显示Excel界面</param> /// <returns></returns> public bool ExportDataGridview(DataGridView gridView, bool isShowExcle,string path) { if (gridView.Rows.Count == 0) return false; //建立Excel对象 Excel.Application excel = new Excel.Application(); Excel.Workbook myWorkBook=excel.Application.Workbooks.Add(true); excel.Visible = isShowExcle; //生成字段名称 for (int i = 0; i < gridView.ColumnCount; i++) { excel.Cells[1, i + 1] = gridView.Columns[i].HeaderText; } //填充数据 for (int i = 0; i < gridView.Rows.Count - 1; i++) { for (int j = 0; j < gridView.Columns.Count; j++) { if (gridView[j, i].ValueType == typeof(string)) { excel.Cells[i + 2, j + 1] = gridView[j, i].Value.ToString(); } else { excel.Cells[i + 2, j + 1] = gridView[j, i].Value.ToString(); } } } object missing = System.Reflection.Missing.Value; excel.ActiveWorkbook.Saved = true; excel.ActiveWorkbook.SaveAs(path, Microsoft.Office.Interop.Excel.XlFileFormat.xlExcel9795, missing, missing, false, false, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, missing, missing, missing, missing, missing); myWorkBook.Close(missing, missing, missing); myWorkBook = null; excel.Quit(); return true; } #endregion
#region 将DataGridView控件中数据导出到Excel,excel格式本身就可以充当数据库,所以我以这种方式进行查询读取 public DataTable ImportExcel(string path) { string Connecstr = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + ";Extended Properties='Excel 8.0;HDR=YES; IMEX=1'"; OleDbConnection Con = new OleDbConnection(Connecstr); Con.Open(); string strCommand = "SELECT * FROM [Sheet1$]"; OleDbDataAdapter adapter = new OleDbDataAdapter(strCommand, Con); DataSet DS = new DataSet(); adapter.Fill(DS, "[Sheet1$]"); DataTable dt=DS.Tables[0]; Con.Close(); return dt; } #endregion }
protected void btnImport_Click(object sender, EventArgs e) { if (FileUpload1.HasFile == false ) // HasFile用来检查FileUpload是否有指定文件 { Response.Write( " <script>alert('请您选择Excel文件')</script> " ); return ; // 当无文件时,返回 } string IsXls = System.IO.Path.GetExtension(FileUpload1.FileName).ToString().ToLower(); //System.IO.Path.GetExtension获得文件的扩展名 if (IsXls != " .xls " ) { Response.Write( " <script>alert('只可以选择Excel文件')</script> " ); return ; // 当选择的不是Excel文件时,返回 } string filename = FileUpload1.FileName; // 获取Execle文件名 DateTime日期函数 string savePath = Server.MapPath(( " upfiles\\ " ) + filename); //Server.MapPath 获得虚拟服务器相对路径 FileUpload1.SaveAs(savePath); // SaveAs 将上传的文件内容保存在服务器上 DataSet ds = ExcelSqlConnection(savePath, filename); // 调用自定义方法 DataRow[] dr = ds.Tables[ 0 ].Select(); // 定义一个DataRow数组 int rowsnum = ds.Tables[ 0 ].Rows.Count; if (rowsnum == 0 ) { Response.Write( " <script>alert('Excel表为空表,无数据!')</script> " ); // 当Excel表为空时,对用户进行提示 } else { for ( int i = 0 ; i < dr.Length; i ++ ) { // 前面除了你需要在建立一个“upfiles”的文件夹外,其他的都不用管了,你只需要通过下面的方式获取Excel的值,然后再将这些值用你的方式去插入到数据库里面 string title = dr[i][ " 标题 " ].ToString(); string linkurl = dr[i][ " 链接地址 " ].ToString(); string categoryname = dr[i][ " 分类 " ].ToString(); string customername = dr[i][ " 内容商 " ].ToString(); // Response.Write("<script>alert('导入内容:" + ex.Message + "')</script>"); } Response.Write( " <script>alert('Excle表导入成功!');</script> " ); } }
#region 连接Excel 读取Excel数据 并返回DataSet数据集合 /// <summary> /// 连接Excel 读取Excel数据 并返回DataSet数据集合 /// </summary> /// <param name="filepath"> Excel服务器路径 </param> /// <param name="tableName"> Excel表名称 </param> /// <returns></returns> public static System.Data.DataSet ExcelSqlConnection( string filepath, string tableName) { string strCon = " Provider=Microsoft.Jet.OLEDB.4.0;Data Source= " + filepath + " ;Extended Properties='Excel 8.0;HDR=YES;IMEX=1' " ; OleDbConnection ExcelConn = new OleDbConnection(strCon); try { string strCom = string .Format( " SELECT * FROM [Sheet1$] " ); ExcelConn.Open(); OleDbDataAdapter myCommand = new OleDbDataAdapter(strCom, ExcelConn); DataSet ds = new DataSet(); myCommand.Fill(ds, " [ " + tableName + " $] " ); ExcelConn.Close(); return ds; } catch { ExcelConn.Close(); return null ; } } #endregion
1.方法一:采用OleDB读取EXCEL文件:
///把EXCEL文件当做一个数据源来进行数据的读取操作,实例如下: public DataSet ExcelToDS(string Path) { string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" +"Data Source="+ Path +";"+"Extended Properties=Excel 8.0;"; OleDbConnection conn = new OleDbConnection(strConn); conn.Open(); string strExcel = ""; OleDbDataAdapter myCommand = null; DataSet ds = null; strExcel="select * from [sheet1$]"; myCommand = new OleDbDataAdapter(strExcel, strConn); ds = new DataSet(); myCommand.Fill(ds,"table1"); return ds; } ///对于EXCEL中的表即sheet([sheet1$])如果不是固定的可以使用下面的方法得到 string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" +"Data Source="+ Path +";"+"Extended Properties=Excel 8.0;"; OleDbConnection conn = new OleDbConnection(strConn); DataTable schemaTable = objConn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables,null); string tableName=schemaTable.Rows[0][2].ToString().Trim(); ///另外:也可进行写入EXCEL文件,实例如下: public void DSToExcel(string Path,DataSet oldds) { //先得到汇总EXCEL的DataSet 主要目的是获得EXCEL在DataSet中的结构 string strCon = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source ="+path1+";Extended Properties=Excel 8.0" ; OleDbConnection myConn = new OleDbConnection(strCon) ; string strCom="select * from [Sheet1$]"; 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(); }
2.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。 点击此处下载此文 件:/Files/songliang/DLL文件.rar ///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(); }
3.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)。
///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(); ///另外也可以将数据库数据导入到一个txt文件,实例如下: //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(); }