How to display error msg if pdf are not found. Also find date diffrence.

Question

1.00/5 (2 votes)

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selection of drodownlist (site name ),

if site data are availabe then display pdf ,
if not then show error "pdf is not found".

What I have tried:

protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
   {

           DataTable dt2 = new DataTable();
           dt2 = dc.datacall("select * from vehicleequipmentreading  where ReadingSite ='" + drpsite.SelectedItem.Text.Trim() + "'order by ReadingId asc");
           // dt2 = dc.datacall("select * from vehicleequipmentreading  where ReadingDate BETWEEN  '" + txtdate.Text.Trim() + "'  AND   '" + txtenddate.Text.Trim() + "'  order by ReadingId asc");
          dt2 = dc.datacall("select * from vehicleequipmentreading  where ReadingDate ='" + txtdate.Text.Trim() + "' order by ReadingId desc");


               GridView GridView1 = new GridView();
               GridView1.AllowPaging = false;
               GridView1.DataSource = dt2;
               GridView1.DataBind();

               Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
               StringWriter sw = new StringWriter();
               HtmlTextWriter hw = new HtmlTextWriter(sw);

               GridView1.RenderControl(hw);


               StringReader sr = new StringReader(sw.ToString());

             //  HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
               iTextSharp.text.html.simpleparser.HTMLWorker worker = new iTextSharp.text.html.simpleparser.HTMLWorker(pdfDoc);


               PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
               pdfDoc.SetPageSize(iTextSharp.text.PageSize.A4.Rotate());

               Response.ContentType = "application/pdf";
               Response.AddHeader("content-disposition", "attachment;" +

                                              "filename=dailyreadingreport.pdf");

               Response.Cache.SetCacheability(HttpCacheability.NoCache);
               pdfDoc.Open();

               worker.Parse(sr);
               pdfDoc.Close();

               Response.Write(pdfDoc);
               Response.End();

   }

Posted 18-Jan-17 19:20pm

Member 12861522

Updated 22-Jan-17 20:31pm

v2

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Comments

Suvendu Shekhar Giri 19-Jan-17 1:21am

just use if..else.. :|

Member 12861522 19-Jan-17 1:39am

how

Richard MacCutchan 19-Jan-17 4:50am


if (you == developer)
{
   write some code;
}
else
{
    consider alternative career;
}

Member 12861522 19-Jan-17 23:25pm

thanks for reply ...!! My career is bright .

ZurdoDev 19-Jan-17 6:46am

Do you know how to code? Where are you stuck?

Member 12861522 19-Jan-17 23:24pm

ok thanks

Richard Deeming 19-Jan-17 8:57am

Your code is vulnerable to SQL Injection[^]. NEVER use string concatenation to build a SQL query. ALWAYS use a parameterized query.

Everything you wanted to know about SQL injection (but were afraid to ask) | Troy Hunt[^]
How can I explain SQL injection without technical jargon? | Information Security Stack Exchange[^]
Query Parameterization Cheat Sheet | OWASP[^]

Member 12861522 19-Jan-17 23:26pm

okey ..! thank you .:)

1 solution

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Member 12861522 · Answer 1 · 2017-01-22T20:31:00

yes ..!! i did it :

call gridview. and generate pdf ..

if (dt8.Rows.Count > 0)
       {
           GridView GridView2 = new GridView();
           GridView2.AllowPaging = false;
           GridView2.DataSource = dt8;
           GridView2.DataBind();


           Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
           StringWriter sw = new StringWriter();
           HtmlTextWriter hw = new HtmlTextWriter(sw);

           GridView2.RenderControl(hw);

           StringReader sr = new StringReader(sw.ToString());

           HTMLWorker htmlparser = new HTMLWorker(pdfDoc);

           PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
           pdfDoc.SetPageSize(iTextSharp.text.PageSize.A4.Rotate());

           Response.ContentType = "application/pdf";
           Response.AddHeader("content-disposition", "attachment;" +

                                          "filename=JobcardDate_vehicleType.pdf");

           Response.Cache.SetCacheability(HttpCacheability.NoCache);
           pdfDoc.Open();

           htmlparser.Parse(sr);
           pdfDoc.Close();
           Response.Write(pdfDoc);

           Response.End();
       }
}

else
      {
          Response.Write("<script> alert('Reports Not Found')</script>");
      }

and for date difference use BETWEEN .

like , data BETWEEN "" AND""