GridView导出Excel 类库

 

代码

using  System;
using  System.Data;
using  System.Configuration;
using  System.IO;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Web.UI.HtmlControls;


namespace  Unit
{

     public   class  GridViewExportUtil
    {
         ///   <summary>
         ///  把 GridView 呈现的内容导出到 Excel
         ///   </summary>
         ///   <param name="fileName"></param>
         ///   <param name="gv"></param>
         public   static   void  Export( string  fileName, GridView gv,HttpResponse pageResponse, string  filepath)
        {
            pageResponse.Clear();
            pageResponse.Charset  =   " UTF-8 " ;
            pageResponse.Buffer  =   false ;
            pageResponse.ClearHeaders();
            pageResponse.ContentEncoding  =  System.Text.Encoding.UTF8;
            pageResponse.HeaderEncoding  =  System.Text.Encoding.UTF8;
            pageResponse.AddHeader( " content-disposition " ,  string .Format( " attachment; filename={0} " , fileName));
             // pageResponse.ContentType = "application/ms-excel";
            pageResponse.ContentType  =   " application/octet-stream " ;
     
             using  (StringWriter sw  =   new  StringWriter())
            {
                
                 using  (HtmlTextWriter htw  =   new  HtmlTextWriter(sw))
                {
                     //   Create a form to contain the grid
                    Table table  =   new  Table();
                    table.Style.Add( " border-top " ,  " solid 1px #cdcdcd " );
                    table.Style.Add( " border-left " ,  " solid 1px #cdcdcd " );

                     //   add the header row to the table
                     if  (gv.HeaderRow  !=   null )
                    {
                        GridViewExportUtil.PrepareControlForExport(gv.HeaderRow);
                        table.Rows.Add(gv.HeaderRow);
                    }

                     //   add each of the data rows to the table
                     foreach  (GridViewRow row  in  gv.Rows)
                    {
                        GridViewExportUtil.PrepareControlForExport(row);
                        table.Rows.Add(row);
                    }

                     //   add the footer row to the table
                     if  (gv.FooterRow  !=   null )
                    {
                        GridViewExportUtil.PrepareControlForExport(gv.FooterRow);
                        table.Rows.Add(gv.FooterRow);
                    }

                     //   render the table into the htmlwriter
                    table.RenderControl(htw);
                     string  date  =  System.DateTime.Now.ToString( " MMddyyyy " );
                     string  outFileName  =   " ExportExcel_ "   +  date  +  fileName;
                     string  comPath  =   " Export/ "   +  outFileName;
                     string  path  =  filepath  +   " \\Export " ;

                     if  (Directory.Exists(path)  ==   false )
                    {
                        System.IO.Directory.CreateDirectory(path);
                     }
                    path  =  path  +   " \\ "   +  outFileName;
                    System.Text.Encoding encode  =  System.Text.Encoding.Unicode;
                    StreamWriter stream  =   new  StreamWriter(path,  false , encode);
                    stream.Write(sw.ToString());
                    stream.Close();
                  
                     // stream.Write(sw);
                     /// /  render the htmlwriter into the response
                    pageResponse.Write(sw.ToString());
                    pageResponse.End();
                    pageResponse.Flush();
                    pageResponse.Close();
                }
            }
        }

         ///   <summary>
         ///  把 GridView 呈现的内容导出到 Excel
         ///   </summary>
         ///   <param name="fileName"></param>
         ///   <param name="gv"></param>
         public   static   void  Export( string  fileName, GridView gv)
        {
            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.AddHeader( " content-disposition " ,  string .Format( " attachment; filename={0} " , fileName));
            HttpContext.Current.Response.ContentType  =   " application/ms-excel " ;


             using  (StringWriter sw  =   new  StringWriter())
            {

                 using  (HtmlTextWriter htw  =   new  HtmlTextWriter(sw))
                {
                     //   Create a form to contain the grid
                    Table table  =   new  Table();
                    table.Style.Add( " border-top " ,  " solid 1px #cdcdcd " );
                    table.Style.Add( " border-left " ,  " solid 1px #cdcdcd " );

                     //   add the header row to the table
                     if  (gv.HeaderRow  !=   null )
                    {
                        GridViewExportUtil.PrepareControlForExport(gv.HeaderRow);
                        table.Rows.Add(gv.HeaderRow);
                    }

                     //   add each of the data rows to the table
                     foreach  (GridViewRow row  in  gv.Rows)
                    {
                        GridViewExportUtil.PrepareControlForExport(row);
                        table.Rows.Add(row);
                    }

                     //   add the footer row to the table
                     if  (gv.FooterRow  !=   null )
                    {
                        GridViewExportUtil.PrepareControlForExport(gv.FooterRow);
                        table.Rows.Add(gv.FooterRow);
                    }

                     //   render the table into the htmlwriter
                    table.RenderControl(htw);


                     //   render the htmlwriter into the response
                    HttpContext.Current.Response.Write(sw.ToString());
                    HttpContext.Current.Response.End();
                }
            }
        }

         ///   <summary>
         ///  把 GridView 呈现的内容导出到 Excel
         ///   </summary>
         ///   <param name="fileName"></param>
         ///   <param name="gv"></param>
         public   static   string  GetExportFileName( string  fileName, GridView gv,  string  filepath)
        {
             try
            {

                 using  (StringWriter sw  =   new  StringWriter())
                {

                     using  (HtmlTextWriter htw  =   new  HtmlTextWriter(sw))
                    {
                         //   Create a form to contain the grid
                        Table table  =   new  Table();
                        table.Style.Add( " border-top " ,  " solid 1px #cdcdcd " );
                        table.Style.Add( " border-left " ,  " solid 1px #cdcdcd " );

                         //   add the header row to the table
                         if  (gv.HeaderRow  !=   null )
                        {
                            GridViewExportUtil.PrepareControlForExport(gv.HeaderRow);
                            table.Rows.Add(gv.HeaderRow);
                        }

                         //   add each of the data rows to the table
                         foreach  (GridViewRow row  in  gv.Rows)
                        {
                            GridViewExportUtil.PrepareControlForExport(row);
                            table.Rows.Add(row);
                        }

                         //   add the footer row to the table
                         if  (gv.FooterRow  !=   null )
                        {
                            GridViewExportUtil.PrepareControlForExport(gv.FooterRow);
                            table.Rows.Add(gv.FooterRow);
                        }

                         //   render the table into the htmlwriter
                        table.RenderControl(htw);
                         string  date  =  System.DateTime.Now.ToString( " MMddyyyy " );
                         string  outFileName  =   " ExportExcel_ "   +  date  +   " _ "   + DateTime.Now.Ticks.ToString()  +   " _ "   +  fileName;
                         string  comPath  =   " Export/ "   +  outFileName;
                         string  path  =  filepath  +   " \\Export " ;

                         if  (Directory.Exists(path)  ==   false )
                        {
                            System.IO.Directory.CreateDirectory(path);
                        }
                        path  =  path  +   " \\ "   +  outFileName;
                        System.Text.Encoding encode  =  System.Text.Encoding.Unicode;
                        StreamWriter stream  =   new  StreamWriter(path,  false , encode);
                        stream.Write(sw.ToString());
                        stream.Close();

                         return  comPath;

                    }
                }
            }
             catch  (Exception e)
            {
                 throw ;
            }
        }
         ///   <summary>
         ///  Replace any of the contained controls with literals
         ///   </summary>
         ///   <param name="control"></param>
         private   static   void  PrepareControlForExport(Control control)
        {
             for  ( int  i  =   0 ; i  <  control.Controls.Count; i ++ )
            {
                Control current  =  control.Controls[i];
                 if  (current  is  LinkButton)
                {
                    control.Controls.Remove(current);
                    control.Controls.AddAt(i,  new  LiteralControl((current  as  LinkButton).Text));
                }
                 else   if  (current  is  ImageButton)
                {
                    control.Controls.Remove(current);
                    control.Controls.AddAt(i,  new  LiteralControl((current  as  ImageButton).AlternateText));
                }
                 else   if  (current  is  HyperLink)
                {
                    control.Controls.Remove(current);
                    control.Controls.AddAt(i,  new  LiteralControl((current  as  HyperLink).Text));
                }
                 else   if  (current  is  DropDownList)
                {
                    control.Controls.Remove(current);
                    control.Controls.AddAt(i,  new  LiteralControl((current  as  DropDownList).SelectedItem.Text));
                }
                 else   if  (current  is  CheckBox)
                {
                    control.Controls.Remove(current);
                    control.Controls.AddAt(i,  new  LiteralControl((current  as  CheckBox).Checked  ?   " True "  :  " False " ));
                }
                 else   if  (current  is  System.Web.UI.WebControls.DataControlFieldHeaderCell)
                {
                    ((DataControlFieldHeaderCell)current).Style.Add( " border-right " ,  " solid 1px #cdcdcd " );
                    ((DataControlFieldHeaderCell)current).Style.Add( " border-bottom " ,  " solid 1px #cdcdcd " );
                    ((DataControlFieldHeaderCell)current).Style.Add( " font-family " ,  " arial " );
                    ((DataControlFieldHeaderCell)current).Style.Add( " color " ,  " #3D3D3D " );
                    ((DataControlFieldHeaderCell)current).Style.Add( " font-size " ,  " 10pt " );
                    ((DataControlFieldHeaderCell)current).Style.Add( " background-color " ,  " #F1FBFF " );
                }
                 else   if  (current  is  System.Web.UI.WebControls.DataControlFieldCell)
                {
                    ((DataControlFieldCell)current).Style.Add( " border-right " ,  " solid 1px #cdcdcd " );
                    ((DataControlFieldCell)current).Style.Add( " border-bottom " ,  " solid 1px #cdcdcd " );
                    ((DataControlFieldCell)current).Style.Add( " font-family " ,  " arial " );
                    ((DataControlFieldCell)current).Style.Add( " color " ,  " #3D3D3D " );
                    ((DataControlFieldCell)current).Style.Add( " font-size " ,  " 10pt " );

                }

                 if  (current.HasControls())
                {
                    GridViewExportUtil.PrepareControlForExport(current);
                }
            }
        }
    }
}

 

 

 

 

调用方法：

 

   protected void ButtonExportGrid_Click(object sender, EventArgs e)
        {
            DataTable dtTrListExport = bllTr_list.GetDataList(DatePickerBegintime.StringValue.ToString().Trim(), DatePickerEndtime.StringValue.ToString().Trim());
            dtTravellingListExport.Columns.Remove(dtTrListExport .Columns["tr_id"]);
            dtTravellingListExport.Columns.Remove(dtTrListExport .Columns["Itinerary"]);
            dtTravellingListExport.Columns.Remove(dtTrListExport .Columns["Durat"]);

            this.GridViewReport.AllowPaging = false;
            this.GridViewReport.DataSource = dtTrListExport ;
            this.GridViewReport.DataBind();
            string fileName = GridViewExportUtil.GetExportFileName("Customers.xls", this.GridViewReport, Server.MapPath(""));
            HttpResponse httpResponse = System.Web.HttpContext.Current.Response;
            FileInfo fileinfo = new FileInfo(Server.MapPath("") + @"\" + fileName);
            httpResponse.Clear();
            httpResponse.ClearHeaders();
            httpResponse.Buffer = false;
            httpResponse.ContentType = "application/octet-stream";
            httpResponse.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(fileinfo.Name, System.Text.Encoding.UTF8));
            //httpResponse.AppendHeader("Content-Length", file.Length.ToString());
            httpResponse.WriteFile(fileinfo.FullName);
            httpResponse.End();
            httpResponse.Flush();
            httpResponse.Close();
            this.GridViewReport.AllowPaging = true;
        }