export of webform

    Uh, how do I say this is written by the boss of the company, I directly call it and it is not the same as what I wrote on Baidu before. I feel very nice. Maybe I have to come back for reference later. The template is what the data you want to export should look like in Excal. For example, I need to export it now 

ok Then find a place to put it and then write a configuration file ExportConfig.xml The contents are as follows

Then an ExcalHelper helper class

    public  static  class ExcelHelper
    { 
　　　　 //The three parameters here are a data result set DataSet, the name of the configuration file template you just wrote, and then the name of a exported Excal
         public  static  void ExprortExcel(DataSet set , string typeName, string fileName)
        {
            string outputFile = HttpContext.Current.Server.MapPath(string.Format("~/Temp/Temp/{0}", fileName));
            var tempDirectory = HttpContext.Current.Server.MapPath("~/Temp/Temp/");
            var files = Directory.GetFiles(tempDirectory);
            try
            {
                foreach (string item in files)
                {
                    File.Delete(item);
                }
            }
            catch (Exception)
            {
            }

            ExportMain.GetProductDescription();
            set.DataSetName = typeName;
            ExportMain.Export(set, outputFile);
            ToClient(outputFile);
        }
        public static void ToClient(string filePath)
        {
            try
            {
                FileInfo info = new FileInfo(filePath);
                System.Web.HttpContext.Current.Response.Clear();
                System.Web.HttpContext.Current.Response.Charset = "UTF-8";
                System.Web.HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF8;
                 // Add header information to specify the default file name for the "File Download/Save As" dialog    
                System.Web.HttpContext.Current.Response. AddHeader( " Content-Disposition " , " attachment; filename= " + HttpUtility.UrlEncode(info.Name, System.Text.Encoding.UTF8));
                 // Add header information, specify the file size, so that the browser can display the download progress    
                System.Web.HttpContext.Current.Response.AddHeader( " Content-Length " , info.Length.ToString());
                 // Specifies that the returned stream is a stream that cannot be read by the client and must be downloaded   
                System.Web.HttpContext.Current.Response.ContentType = " application/ms-excel " ;
                 // Send the file stream to the client    
                System.Web.HttpContext.Current.Response.WriteFile(info.FullName);
                 //   File. Delete(file.FullName);  
                 // Stop the execution of the page    
                HttpContext.Current.Response.End();
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (File.Exists(filePath))
                {
                    File.Delete(filePath);
                }

            }
        }
    } 
   //Call 
   //Create a DataSet 
　　DataSet set = new DataSet(); 
   //Create a DataTable 
　　DataTable table = new DataTable("Body");//The name here is the name of the source in your configuration file 
　　//After Create columns for this Table
 　　

　　　table.Columns.Add("Year", typeof(int));//Year
     table.Columns.Add("ProvinceName", typeof(string));//Province
     table.Columns.Add("CourseName", typeof( string));//
     Artistic table.Columns.Add("MinScore", typeof(int));//Score start
     table.Columns.Add("MaxScore", typeof(int));//Score cutoff
     table.Columns .Add("SameNumber", typeof(int));//Number of people with the same score
     table.Columns.Add("LowestRank", typeof(int));//Lowest rank
     table.Columns.Add("HighestRank", typeof (int));//Highest order
     table.Columns.Add("istrue", typeof(string));//Is the value correct

   //Append data in a loop as you like 
   table.Rows.Add(Column 1, Column 2, Column 3, Column 4, Column 5, Column 6, Column 7, Column 8, Column 9); 
   //Then put this table into the DataSet Medium 
   set.Tables.Add(table); 
   //Finally call the ExcalHelper helper class to pass in the required parameters and it's OK 
   ExcalHelper(set,"OneParagraph","Excal file name to export"); 

   will add more worksheets or Thank you for reading the cross-line header