C#导出Exel

 

asp.net里导出excel表方法汇总 

 

1、由dataset生成 

public void CreateExcel(DataSet ds,string typeid,string FileName) { HttpResponse resp; resp = Page.Response; resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312"); resp.AppendHeader("Content-Disposition", "attachment;filename=" + FileName); string colHeaders= "", ls_item=""; int i=0; //定义表对象与行对像，同时用DataSet对其值进行初始化 DataTable dt=ds.Tables[0]; DataRow[] myRow=dt.Select(""); // typeid=="1"时导出为EXCEL格式文件；typeid=="2"时导出为XML格式文件 if(typeid=="1") { //取得数据表各列标题，各标题之间以/t分割，最后一个列标题后加回车符 for(i=0;i colHeaders+=dt.Columns[i].Caption.ToString()+"/t"; colHeaders +=dt.Columns[i].Caption.ToString() +"/n"; //向HTTP输出流中写入取得的数据信息 resp.Write(colHeaders); //逐行处理数据 foreach(DataRow row in myRow) { //在当前行中，逐列获得数据，数据之间以/t分割，结束时加回车符/n for(i=0;i ls_item +=row[i].ToString() + "/t"; ls_item += row[i].ToString() +"/n"; //当前行数据写入HTTP输出流，并且置空ls_item以便下行数据 resp.Write(ls_item); ls_item=""; } } else { if(typeid=="2") { //从DataSet中直接导出XML数据并且写到HTTP输出流中 resp.Write(ds.GetXml()); } } //写缓冲区中的数据到HTTP头文件中 resp.End(); }  

 

 

 

2、使用微软的C＋＋写的ACTIVEX控件：http://download.microsoft.com/download/OfficeXPDev/sample/1.0/WIN98MeXP/EN-US/Dsoframerctl.exe 

3、由datagrid生成： 

 

public void ToExcel(System.Web.UI.Control ctl) { HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename=Excel.xls"); HttpContext.Current.Response.Charset ="UTF-8"; HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default; HttpContext.Current.Response.ContentType ="application/ms-excel";//image/JPEG;text/HTML;image/GIF;vnd.ms-excel/msword ctl.Page.EnableViewState =false; System.IO.StringWriter tw = new System.IO.StringWriter() ; System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw); ctl.RenderControl(hw); HttpContext.Current.Response.Write(tw.ToString()); HttpContext.Current.Response.End(); }  

 

用法：ToExcel(datagrid1); 

 

 

4、这个用dataview ，代码好长 

 

public void OutputExcel(DataView dv,string str) { // // TODO: 在此处添加构造函数逻辑 // //dv为要输出到Excel的数据，str为标题名称 GC.Collect(); Application excel;// = new Application(); int rowIndex=4; int colIndex=1; _Workbook xBk; _Worksheet xSt; excel= new ApplicationClass(); xBk = excel.Workbooks.Add(true); xSt = (_Worksheet)xBk.ActiveSheet; // //取得标题 // foreach(DataColumn col in dv.Table.Columns) { colIndex++; excel.Cells[4,colIndex] = col.ColumnName; xSt.get_Range(excel.Cells[4,colIndex],excel.Cells[4,colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;//设置标题格式为居中对齐 } // //取得表格中的数据 // foreach(DataRowView row in dv) { rowIndex ++; colIndex = 1; foreach(DataColumn col in dv.Table.Columns) { colIndex ++; if(col.DataType == System.Type.GetType("System.DateTime")) { excel.Cells[rowIndex,colIndex] = (Convert.ToDateTime(row[col.ColumnName].ToString())).ToString("yyyy-MM-dd"); xSt.get_Range(excel.Cells[rowIndex,colIndex],excel.Cells[rowIndex,colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;//设置日期型的字段格式为居中对齐 } else if(col.DataType == System.Type.GetType("System.String")) { excel.Cells[rowIndex,colIndex] = "''"+row[col.ColumnName].ToString(); xSt.get_Range(excel.Cells[rowIndex,colIndex],excel.Cells[rowIndex,colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;//设置字符型的字段格式为居中对齐 } else { excel.Cells[rowIndex,colIndex] = row[col.ColumnName].ToString(); } } } // //加载一个合计行 // int rowSum = rowIndex + 1; int colSum = 2; excel.Cells[rowSum,2] = "合计"; xSt.get_Range(excel.Cells[rowSum,2],excel.Cells[rowSum,2]).HorizontalAlignment = XlHAlign.xlHAlignCenter; // //设置选中的部分的颜色 // xSt.get_Range(excel.Cells[rowSum,colSum],excel.Cells[rowSum,colIndex]).Select(); xSt.get_Range(excel.Cells[rowSum,colSum],excel.Cells[rowSum,colIndex]).Interior.ColorIndex = 19;//设置为浅黄色，共计有56种 // //取得整个报表的标题 // excel.Cells[2,2] = str; // //设置整个报表的标题格式 // xSt.get_Range(excel.Cells[2,2],excel.Cells[2,2]).Font.Bold = true; xSt.get_Range(excel.Cells[2,2],excel.Cells[2,2]).Font.Size = 22; // //设置报表表格为最适应宽度 // xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,colIndex]).Select(); xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,colIndex]).Columns.AutoFit(); // //设置整个报表的标题为跨列居中 // xSt.get_Range(excel.Cells[2,2],excel.Cells[2,colIndex]).Select(); xSt.get_Range(excel.Cells[2,2],excel.Cells[2,colIndex]).HorizontalAlignment = XlHAlign.xlHAlignCenterAcrossSelection; // //绘制边框 // xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,colIndex]).Borders.LineStyle = 1; xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,2]).Borders[XlBordersIndex.xlEdgeLeft].Weight = XlBorderWeight.xlThick;//设置左边线加粗 xSt.get_Range(excel.Cells[4,2],excel.Cells[4,colIndex]).Borders[XlBordersIndex.xlEdgeTop].Weight = XlBorderWeight.xlThick;//设置上边线加粗 xSt.get_Range(excel.Cells[4,colIndex],excel.Cells[rowSum,colIndex]).Borders[XlBordersIndex.xlEdgeRight].Weight = XlBorderWeight.xlThick;//设置右边线加粗 xSt.get_Range(excel.Cells[rowSum,2],excel.Cells[rowSum,colIndex]).Borders[XlBordersIndex.xlEdgeBottom].Weight = XlBorderWeight.xlThick;//设置下边线加粗 // //显示效果 // excel.Visible=true; //xSt.Export(Server.MapPath(".")+"//"+this.xlfile.Text+".xls",SheetExportActionEnum.ssExportActionNone,Microsoft.Office.Interop.OWC.SheetExportFormat.ssExportHTML); xBk.SaveCopyAs(Server.MapPath(".")+"//"+this.xlfile.Text+".xls"); ds = null; xBk.Close(false, null,null); excel.Quit(); System.Runtime.InteropServices.Marshal.ReleaseComObject(xBk); System.Runtime.InteropServices.Marshal.ReleaseComObject(excel); System.Runtime.InteropServices.Marshal.ReleaseComObject(xSt); xBk = null; excel = null; xSt = null; GC.Collect(); string path = Server.MapPath(this.xlfile.Text+".xls"); System.IO.FileInfo file = new System.IO.FileInfo(path); Response.Clear(); Response.Charset="GB2312"; Response.ContentEncoding=System.Text.Encoding.UTF8; // 添加头信息，为"文件下载/另存为"对话框指定默认文件名 Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(file.Name)); // 添加头信息，指定文件大小，让浏览器能够显示下载进度 Response.AddHeader("Content-Length", file.Length.ToString()); // 指定返回的是一个不能被客户端读取的流，必须被下载 Response.ContentType = "application/ms-excel"; // 把文件流发送到客户端 Response.WriteFile(file.FullName); // 停止页面的执行 Response.End(); }  

 

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SqlConnection conn=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["conn"]); 
   SqlDataAdapter da=new SqlDataAdapter("select * from tb1",conn); 
   DataSet ds=new DataSet(); 
   da.Fill(ds,"table1"); 
   DataTable dt=ds.Tables["table1"]; 
   StringWriter sw=new StringWriter(); 
   sw.WriteLine("自动编号,姓名,年龄"); 
   foreach(DataRow dr in dt.Rows) 
   { 
    sw.WriteLine(dr["ID"]+","+dr["vName"]+","+dr["iAge"]); 
   } 
   sw.Close(); 
   Response.AddHeader("Content-Disposition", "attachment; filename=test.csv"); 
   Response.ContentType = "application/ms-excel"; 
   Response.ContentEncoding=System.Text.Encoding.GetEncoding("GB2312"); 
   Response.Write(sw); 
   Response.End();

对方法一，二补充一点，如果你希望导出的是xls文件分隔符用＼t就能了，不要用逗号

代码修改如下： 
sw.WriteLine("自动编号＼t姓名＼t年龄"); 
   foreach(DataRow dr in dt.Rows) 
   { 
    sw.WriteLine(dr["ID"]+"＼t"+dr["vName"]+"＼t"+dr["iAge"]); 
   } 
另外，修改输出的文件扩展名为xls即可。 

---------------------------------项目实践--yx---1

List_join = (IList<MGroupbuy_Join>)Session["list"]; DataSet ds_table= PubFun.ConvertToDataSet<MGroupbuy_Join>(List_join); //FileStream fs = new FileStream(name, FileMode.Create, FileAccess.Write); //StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.GetEncoding("gb2312")); StringWriter sw = new StringWriter(); sw.WriteLine("自动编号/t姓名/t年龄"); foreach (DataRow dr in ds_table.Tables[0].Rows) { sw.WriteLine(dr["join_id"] + "/t" + dr["mphone"] + "/t" + dr["name"]); } sw.Close(); Response.AddHeader("Content-Disposition", "attachment; filename=Excel.xls"); Response.ContentType = "application/ms-excel";// 指定返回的是一个不能被客户端读取的流，必须被下载 //Response.WriteFile(name); // 把文件流发送到客户端 //Response.End(); HttpContext.Current.Response.Write(sw.ToString()); HttpContext.Current.Response.End();

------------2

HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=Excel.xls"); HttpContext.Current.Response.Charset = "UTF-8"; HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.Default; HttpContext.Current.Response.ContentType = "application/ms-excel";//image/JPEG;text/HTML;image/GIF;vnd.ms-excel/msword this.gvList.Page.EnableViewState = false; System.IO.StringWriter tw = new System.IO.StringWriter(); System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw); this.gvList.RenderControl(hw); HttpContext.Current.Response.Write(tw.ToString()); HttpContext.Current.Response.End(); 

--------------------------------群里人发 据说效率很高

   /// <summary>
        /// 把dset输入为html table
        /// </summary>
        /// <param name="ds">数据</param>
        /// <returns></returns>
        private static string ExportHtmTable(System.Data.DataSet dset)
        {


            System.Text.StringBuilder data = new System.Text.StringBuilder();
            data.Append("<html xmlns:x=\"urn:schemas-microsoft-com:office:excel\">");
            data.Append("<head>");
            data.Append("<meta http-equiv=\"content-type\" content=\"application/ms-excel; charset=GB2312\"/>");
            data.Append("<!--[if gte mso 9]><xml>");
            data.Append("<x:ExcelWorkbook>");
            data.Append("<x:ExcelWorksheets>");
            data.Append("<x:ExcelWorksheet>");
            data.Append("<x:Name>模板</x:Name>");
            data.Append("<x:WorksheetOptions>");
            data.Append("<x:Print>");
            data.Append("<x:ValidPrinterInfo />");
            data.Append("</x:Print>");
            data.Append("</x:WorksheetOptions>");
            data.Append("</x:ExcelWorksheet>");
            data.Append("</x:ExcelWorksheets>");
            data.Append("</x:ExcelWorkbook>");
            data.Append("</xml>");
            data.Append("<![endif]-->");
            data.Append("</head>");
            data.Append("<body>");
            //data = ds.DataSetName + "\n";


            foreach (System.Data.DataTable tb in dset.Tables)
            {
                //data += tb.TableName + "\n";
                data.Append("<table cellspacing=\"0\" cellpadding=\"5\" rules=\"all\">");
                //写出列名
                data.Append("<tr style=\"font-weight: bold; white-space: nowrap;\">");


                foreach (System.Data.DataColumn column in tb.Columns)
                {
                    data.Append("<td>" + column.ColumnName + "</td>");
                }
                data.Append("</tr>");


                //写出数据


                foreach (System.Data.DataRow row in tb.Rows)
                {
                    data.Append("<tr>");
                    foreach (System.Data.DataColumn column in tb.Columns)
                    {
                        data.Append("<td>" + row[column].ToString() + "</td>");
                    }
                    data.Append("</tr>");
                }
                data.Append("</table>");
            }


            data.Append("</body>");
            data.Append("</html>");
            return data.ToString();
        }