Konnte nicht nach Excel exportieren

Question

** Ich verwende den folgenden Code, um zu einem Excel zu exportieren. Es tut nichts. Bitte lassen Sie mich wissen, was ich vermisse **

public ActionResult ExportToExcel() 
     { 
      // Getinfo.ExportToExcel(); 
      GridView gv = new GridView(); 
      gv.DataSource = from i in Getinfo.data() 
       select new { 
       //properties 

      }; 
      gv.DataBind(); 
      Response.ClearContent(); 
      Response.Buffer = true; 
      Response.AddHeader("content-disposition", "attachment; filename=Demo.xlsx"); 
      Response.ContentType = "application/ms-excel"; 
      Response.Charset = ""; 
      StringWriter objStringWriter = new StringWriter(); 
      HtmlTextWriter objHtmlTextWriter = new HtmlTextWriter(objStringWriter); 
      gv.RenderControl(objHtmlTextWriter); 
      Response.Output.Write(objStringWriter.ToString()); 
      Response.Flush(); 
      Response.End(); 
      return View(); 
     } 

Answer 1

Dies sollte gut funktionieren. Schneiden Sie einfach das Teil aus, das Sie brauchen.

using System; 
using System.Windows.Forms; 
using System.Data; 
using System.Data.SqlClient; 
using Excel = Microsoft.Office.Interop.Excel; 

namespace WindowsApplication1 
{ 
    public partial class Form1 : Form 
    { 
     public Form1() 
     { 
      InitializeComponent(); 
     } 

     private void button1_Click(object sender, EventArgs e) 
     { 
      SqlConnection cnn ; 
      string connectionString = null; 
      string sql = null; 
      string data = null; 
      int i = 0; 
      int j = 0; 

      Excel.Application xlApp ; 
      Excel.Workbook xlWorkBook ; 
      Excel.Worksheet xlWorkSheet ; 
      object misValue = System.Reflection.Missing.Value; 

      xlApp = new Excel.Application(); 
      xlWorkBook = xlApp.Workbooks.Add(misValue); 
      xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1); 

      connectionString = "data source=servername;initial catalog=databasename;user id=username;password=password;"; 
      cnn = new SqlConnection(connectionString); 
      cnn.Open(); 
      sql = "SELECT * FROM Product"; 
      SqlDataAdapter dscmd = new SqlDataAdapter(sql, cnn); 
      DataSet ds = new DataSet(); 
      dscmd.Fill(ds); 

      for (i = 0; i <= ds.Tables[0].Rows.Count - 1; i++) 
      { 
       for (j = 0; j <= ds.Tables[0].Columns.Count - 1; j++) 
       { 
        data = ds.Tables[0].Rows[i].ItemArray[j].ToString(); 
        xlWorkSheet.Cells[i + 1, j + 1] = data; 
       } 
      } 

      xlWorkBook.SaveAs("csharp.net-informations.xls", Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue); 
      xlWorkBook.Close(true, misValue, misValue); 
      xlApp.Quit(); 

      releaseObject(xlWorkSheet); 
      releaseObject(xlWorkBook); 
      releaseObject(xlApp); 

      MessageBox.Show("Excel file created , you can find the file c:\\csharp.net-informations.xls"); 
     } 

     private void releaseObject(object obj) 
     { 
      try 
      { 
       System.Runtime.InteropServices.Marshal.ReleaseComObject(obj); 
       obj = null; 
      } 
      catch (Exception ex) 
      { 
       obj = null; 
       MessageBox.Show("Exception Occured while releasing object " + ex.ToString()); 
      } 
      finally 
      { 
       GC.Collect(); 
      } 
     } 

    } 
}