VerifyRenderingInServerForm（System.Web.UI.Control）グリッドビューをPDFにエクスポート中

Question

通常の.aspxでは、gridviewからデータをエクスポートしようとしていますが、webusercontrl.ascxフォームでこれを試してみると、次のようなエラーが表示されます

VerifyRenderingInServerForm(System.Web.UI.Control)': no suitable method found to override.... 

どのように私はwebusercontrol.ascxでデータをエクスポートすることができ、私を助けてください... ここでは私のコードである

 using System; 
    using System.Collections.Generic; 
    using System.Linq; 
    using System.Web; 
    using System.Web.UI; 
    using System.Web.UI.WebControls; 
    using System.IO; 
    using iTextSharp.text; 
    using iTextSharp.text.html.simpleparser; 
    using iTextSharp.text.pdf; 

    namespace MortgageSaver 
    { 
     public partial class Paymentreportsviewcontrl : System.Web.UI.UserControl 
     { 
      MortgagesaverEntities mortgageentity = new MortgagesaverEntities(); 
      protected void Page_Load(object sender, EventArgs e) 
      { 
     if (!Page.IsPostBack) 
     { 
      if (Session["Username"] != null) 
      { 

       if (Session["Loanid"] != null) 
       { 
        txtloanid.Text = Session["Loanid"].ToString(); 
        grdviewPayments.Attributes.Add("bordercolor ", "#A4C2CE"); 
        GetPaymentReport(); 
       } 
      } 
      else 
      { 
       Response.Redirect("AdminLogin.aspx"); 
      } 



     } 

    } 
    private void GetPaymentReport() 
    { 
     try 
     { 
      string todate = txttodate.Text; 
      string[] todatesplt = todate.Split('-'); 
      int todatemnth = Convert.ToInt32(todatesplt[0]); 
      int todatedate = Convert.ToInt32(todatesplt[1]); 
      int todateyr = Convert.ToInt32(todatesplt[2]); 

      string fromdate = txtfromdate.Text; 
      string[] frmdatesplt = fromdate.Split('-'); 
      int frmdatemnth = Convert.ToInt32(frmdatesplt[0]); 
      int frmdatedate = Convert.ToInt32(frmdatesplt[1]); 
      int frmdateyr = Convert.ToInt32(frmdatesplt[2]); 
      DateTime start = new DateTime(frmdateyr, frmdatemnth, frmdatedate); 
      DateTime end = new DateTime(todateyr, todatemnth, todatedate); 
      int loanpaymentid = Convert.ToInt32(Session["Loanid"].ToString()); 
      var query = from p in mortgageentity.Payments 
         join D in mortgageentity.Debit_Method on p.Debit_Method_ID equals D.Debit_Method_ID 
         join pt in mortgageentity.Payment_Type on p.Payment_Type_ID equals pt.Payment_Type_ID 
         where (p.Client_Pmt_Date >= start) && (p.Client_Pmt_Date <= end) && (p.Loan_ID == loanpaymentid)orderby p.Client_Pmt_Date descending 
         select new 
         { 
          p.Pmt_ID, 
          p.Loan_ID, 
          p.Client_Pmt_Date, 
          p.MtgSvr_Pmt_Start_Date2, 
          D.Debit_Method_Desc, 
          p.Total_Debit_Amt, 
          p.CreditAmt, 
          p.LenderAmt, 
          pt.Payment_Type_Desc, 
          p.Return_Code, 
          p.Returned_Date 
         }; 
      grdviewPayments.DataSource = query.ToList(); 
      grdviewPayments.DataBind(); 
     } 
     catch { } 

    } 
    protected string Getammount(object MonthPayAmt) 
    { 
     if (MonthPayAmt != "") 
     { 
      return "$" + MonthPayAmt; 
     } 
     else 
      return null; 
    } 
    protected void btnviewreport_Click(object sender, EventArgs e) 
    { 
     grdviewPayments.Attributes.Add("bordercolor ", "#A4C2CE"); 
     GetPaymentReport(); 

    } 
    public override void VerifyRenderingInServerForm(grdviewPayments) 
    { 
     /* Verifies that the control is rendered */ 
    } 
    protected void btnemail_Click(object sender, EventArgs e) 
    { 
     Response.ContentType = "application/pdf"; 
     Response.AddHeader("content-disposition", "attachment;filename=UserDetails.pdf"); 
     Response.Cache.SetCacheability(HttpCacheability.NoCache); 
     StringWriter sw = new StringWriter(); 
     HtmlTextWriter hw = new HtmlTextWriter(sw); 
     grdviewPayments.AllowPaging = true; 
     grdviewPayments.DataBind(); 
     grdviewPayments.RenderControl(hw); 
     grdviewPayments.HeaderRow.Style.Add("width", "15%"); 
     grdviewPayments.HeaderRow.Style.Add("font-size", "10px"); 
     grdviewPayments.Style.Add("text-decoration", "none"); 
     grdviewPayments.Style.Add("font-family", "Arial, Helvetica, sans-serif;"); 
     grdviewPayments.Style.Add("font-size", "8px"); 
     StringReader sr = new StringReader(sw.ToString()); 
     Document pdfDoc = new Document(PageSize.A2, 7f, 7f, 7f, 0f); 
     HTMLWorker htmlparser = new HTMLWorker(pdfDoc); 
     PdfWriter.GetInstance(pdfDoc, Response.OutputStream); 
     pdfDoc.Open(); 
     htmlparser.Parse(sr); 
     pdfDoc.Close(); 
     Response.Write(pdfDoc); 
     Response.End(); 
    } 


} 

}

Answer 1

ただ、このFを追加あなたのコードへの敬意;

public override void VerifyRenderingInServerForm(Control control) 
    { 
    /* Confirms that an HtmlForm control is rendered for the specified ASP.NET 
     server control at run time. */ 
    } 

また必ずusing System.Web.UIもあなたは自分のページにこのコードを追加し、あなたがASCXファイルを使用している場合は.aspx.cs

public override void VerifyRenderingInServerForm(Control control){ 
/* Confirms that an HtmlForm control is rendered for the specified ASP.NET 
    server control at run time. */} 

Answer 2

を追加しますDefault.aspx.cs。

example.ascx.csそのコードのページは機能しません。

Answer 3

に次のコードを追加する必要が