export gridview data to pdf - c#

its throwing error like document has no pages.
i have written code like this.
protected void Button4_Click(object sender, EventArgs e)
{
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition","attachment;filename=GridViewExport.pdf");
Response.Cache.SetCacheability(HttpCacheability.NoCache);
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
GridView1.AllowPaging = false;
GridView1.DataBind();
GridView1.RenderControl(hw);
StringReader sr = new StringReader(sw.ToString());
Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
pdfDoc.Open();
htmlparser.Parse(sr);
pdfDoc.Close();
Response.Write(pdfDoc);
Response.End();
}
can any1 help me on this


I suggest reading the documentation of the library you are using.
The error suggests that you need to add a page to the new document before you try and add content to it.
In some of the PDF libraries you add a page and then need to set it as the current page before adding content.

Related

Export to PDF using iText not displaying complete data from GridView

I am trying to export my GridView to PDF. When I click the button I can see that the document downloading with around 977KB but when it has finished download and browse to the download folder the file size then is 1KB.
This is the code I am using:
protected void ExportToPDF(object sender, EventArgs e)
{
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition",
"attachment;filename=GridViewExport.pdf");
Response.Cache.SetCacheability(HttpCacheability.NoCache);
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
GridView1.AllowPaging = false;
GridView1.DataBind();
GridView1.RenderControl(hw);
StringReader sr = new StringReader(sw.ToString());
Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
pdfDoc.Open();
htmlparser.Parse(sr);
pdfDoc.Close();
Response.Write(pdfDoc);
Response.End();
}
I am not sure what is going wrong here?
Thanks

want to convert in pdf in asp but shwing error - RegisterForEventValidation can only be called during Render();

Code in aspx.cs
protected void btnExport_Click(object sender, EventArgs e)
{
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment;filename=TestPage.pdf");
Response.Cache.SetCacheability(HttpCacheability.NoCache);
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
this.Page.RenderControl(hw);
StringReader sr = new StringReader(sw.ToString());
Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 100f, 0f);
HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
pdfDoc.Open();
htmlparser.Parse(sr);
pdfDoc.Close();
Response.Write(pdfDoc);
Response.End();
}
and it's showing error in
this.Page.RenderControl(hw);
its showing error like,
RegisterForEventValidation can only be called during Render();
i search for solution - <%# Page Language="C#" AutoEventWireup="true" EnableEventValidation = "false">
but its not solved.
in my page i have
**
<script type="text/javascript">
var contnm = "<%= ContentPlaceHolder1.ClientID%>" + "_";
</script>
**
may be that's why it's showing error.

Converting a modal dialog window to pdf

I'm trying to convert a modal dialog with 3 DataTables to pdf using iTextSharp:
DataTable dtTable = (DataTable)ViewState["LoanPlan"];
DataTable dtTax = (DataTable)ViewState["PlanTaxData"];
DataTable dtPlan = (DataTable)ViewState["PlanAllData"];
I'm using this code to try and accomplish it:
protected void buttonPDF_Click(object sender, EventArgs e)
{
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment;filename=TestPage.pdf");
Response.Cache.SetCacheability(HttpCacheability.NoCache);
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
this.RenderControl(hw);
StringReader sr = new StringReader(sw.ToString());
Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 100f, 0f);
HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
pdfDoc.Open();
htmlparser.Parse(sr);
pdfDoc.Close();
Response.Write(pdfDoc);
Response.End();
}
But it seems that it's actually trying to convert the whole .aspx page to .pdf format. How should I go about targeting just the modal dialogue or just the 3 DataTables?

Export to pdf | How to show option to open and save

I have this working code for exporting to pdf. When I export it , it asks me location to save file. Instead , I want to have option of OPEN or SAVE . Currently what I am doing is :
protected void btnPdf_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);
GridView2.AllowPaging = false;
GridView2.DataBind();
GridView2.RenderControl(hw);
GridView2.HeaderRow.Style.Add("width", "15%");
GridView2.HeaderRow.Style.Add("font-size", "10px");
GridView2.Style.Add("text-decoration", "none");
GridView2.Style.Add("font-family", "Arial, Helvetica, sans-serif;");
GridView2.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();
}

If you have the file on the server
Response.TransmitFile(//FILE PATH);
If you don't
Response.BinaryWrite(//Pass Byte Array)

how to export gridview image and data to PDF using asp.net or Export gridview data to PDF using asp.net

protected void Button4_Click(object sender, EventArgs e)
{
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition","attachment;filename=GridViewExport.pdf");
Response.Cache.SetCacheability(HttpCacheability.NoCache);
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
GridView1.AllowPaging = false;
GridView1.DataBind();
GridView1.RenderControl(hw);
StringReader sr = new StringReader(sw.ToString());
Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
pdfDoc.Open();
htmlparser.Parse(sr);//this is the error line
pdfDoc.Close();
Response.Write(pdfDoc);
Response.End();
}

You will have to use 3rd party control for that
Try using iText Sharp library its free
for more info go here

Categories

Resources