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現在、データテーブルからc＃asp.netmvc3のExcelシートにデータをエクスポートしようとしています。私はインターネットをサーフィンして、データテーブルをExcelシートにエクスポートするためのいくつかのコードを見つけました。エラーなしで実行されます。ただし、Excelシートは作成されません。これを行うための提案。

            string filename = "DownloadMobileNoExcel.xls";
            DataGrid dgGrid = new DataGrid();
            dgGrid.DataSource = dt;
            dgGrid.DataBind();
            Response.Clear();
            Response.AddHeader("content-disposition", "attachment;filename=" 
              + filename + "");
            Response.Charset = "";
            Response.Cache.SetCacheability(HttpCacheability.NoCache);
            Response.ContentType = "application/vnd.ms-excel";

            //Convert the rendering of the gridview to a string representation 
            StringWriter sw = new StringWriter();
            HtmlTextWriter htw = new HtmlTextWriter(sw);
            dgGrid.RenderControl(htw);

            //Open a memory stream that you can use to write back to the response
            byte[] byteArray = Encoding.ASCII.GetBytes(sw.ToString());
            MemoryStream s = new MemoryStream(byteArray);
            StreamReader sr = new StreamReader(s, Encoding.ASCII);

            //Write the stream back to the response
            Response.Write(sr.ReadToEnd());
            Response.End();
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2 に答える 2

3 
protected void ExportToExcel(object sender, EventArgs e)
{

    //Get the data from database into datatable
    string strQuery = "select CustomerID, ContactName, City, PostalCode" +" from customers";
    SqlCommand cmd = new SqlCommand(strQuery);
    DataTable dt = GetData(cmd);
    //Create a dummy GridView
    GridView GridView1 = new GridView();
    GridView1.AllowPaging = false;
    GridView1.DataSource = dt;
    GridView1.DataBind();
    Response.Clear();
    Response.Buffer = true;
    Response.AddHeader("content-disposition","attachment;filename=DataTable.xls");
    Response.Charset = "";
    Response.ContentType = "application/vnd.ms-excel";
    StringWriter sw = new StringWriter();
    HtmlTextWriter hw = new HtmlTextWriter(sw);
    for (int i = 0; i < GridView1.Rows.Count; i++)
    {
        //Apply text style to each Row
        GridView1.Rows[i].Attributes.Add("class", "textmode");
    }
    GridView1.RenderControl(hw);
    //style to format numbers to string
    string style = @"<style> .textmode { mso-number-format:\@; } </style>";
    Response.Write(style);
    Response.Output.Write(sw.ToString());
    Response.Flush();
    Response.End();
}

ソース：http ：//www.aspsnippets.com/Articles/Export-DataSet-or-DataTable-to-Word-Excel-PDF-and-CSV-Formats.aspx

于 2012-09-17T06:33:23.627 に答える
1

UはMicrosoft.Office.Interop.Excelライブラリを使用できます

using Microsoft.Office.Interop.Excel;

System.Reflectionを使用します。

     Microsoft.Office.Interop.Excel.Application ObjExcel = new Microsoft.Office.Interop.Excel.Application();
            Microsoft.Office.Interop.Excel.Workbook ObjWorkBook;
            Microsoft.Office.Interop.Excel.Worksheet ObjWorkSheet;
            ObjWorkBook = ObjExcel.Workbooks.Add(System.Reflection.Missing.Value);
            ObjWorkSheet = (Microsoft.Office.Interop.Excel.Worksheet)ObjWorkBook.Sheets[1];

            int counter = 1;
            foreach (var item in SomeDataCollection)
            {
                ObjWorkSheet.Cells[counter, 1] = item.some_property1;
                ObjWorkSheet.Cells[counter, 2] = item.some_property2;
                ObjWorkSheet.Cells[counter, 3] = item.some_property3;     
                counter++;
            }
            ObjWorkSheet.Columns.AutoFit();
            ObjWorkSheet.Columns.get_Range("M1", "M60").ColumnWidth = 25;
    string filename;    
            string[] file_parts = Convert.ToString(DateTime.Now).Split(' ');
            filename = file_parts[0].Replace("/", ".") + "(" + file_parts[1].Replace(":", "-") + ")" + "-file.xls";
            string save_path = AppDomain.CurrentDomain.BaseDirectory + "Content/files/" + filename;

            ObjWorkBook.SaveAs(save_path, Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookNormal,
                                            System.Reflection.Missing.Value, System.Reflection.Missing.Value,
                                            System.Reflection.Missing.Value, System.Reflection.Missing.Value, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive,
                                            System.Reflection.Missing.Value, System.Reflection.Missing.Value,
                                            System.Reflection.Missing.Value, System.Reflection.Missing.Value,
                                            System.Reflection.Missing.Value);

            ObjWorkBook.Close(false, System.Reflection.Missing.Value, System.Reflection.Missing.Value);
            ObjExcel.Workbooks.Close();
            ObjExcel.Quit();

ファイルのダウンロード。imは検索フォームを使用しているため、フォームがajaxを使用せずに送信された場合は、Excelファイルを返します。それ以外の場合は、アイテムのリストをreturlします。

[HttpPost]
    public ActionResult Search(MyModel model)
    {
        model.GetCollection();
        if (Request.IsAjaxRequest())
        {
            return PartialView("_listItems", model.SomeCollection);
        }
        else
        {           
            string filename = model.GetExcel();
            string save_path = AppDomain.CurrentDomain.BaseDirectory + "Content/Personal/" + filename;
            HttpContext.Response.Clear();
            HttpContext.Response.ClearContent();
            HttpContext.Response.ClearHeaders();
            HttpContext.Response.AddHeader("content-disposition", string.Format("attachment; filename={0}", filename));
            HttpContext.Response.ContentType = "application/excel";
            HttpContext.Response.WriteFile(save_path);
            HttpContext.Response.End();
            System.IO.File.Delete(save_path);
            return new EmptyResult();
        }              

    }
于 2012-09-17T06:38:36.633 に答える