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I know there are several articles available for this error. Please do not refer me to those links, because I have already went through many and I am still unable to figure out the cause of this error. This is the code which I am using under button_click

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();

I would like to inform you that I am using template field in my design and Below is the design view

<asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="False" 
            EnableModelValidation="True" Height="3px" 
        Width="2px" RowHeaderColumn="USN" AllowSorting="true"  OnSorting="GridView2_Sorting">
        <HeaderStyle BackColor="#df5015" Font-Bold="true" ForeColor="White" />
        <Columns>
            <asp:BoundField DataField="USN" HeaderText="Usn" SortExpression="USN"  ReadOnly = "true"/>
            <asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name"  ReadOnly = "true"/>
            <asp:TemplateField HeaderText="Test1">
             <ItemTemplate>
             <asp:TextBox ID="Testbox1" runat="server" Text='<%# Eval("T1") %>' />
             </ItemTemplate>
             </asp:TemplateField>
             
             <asp:TemplateField HeaderText="Quiz1">
             <ItemTemplate>
             <asp:TextBox ID="Quizbox1" runat="server" Text='<%# Eval("Q1") %>' />
             </ItemTemplate>
             </asp:TemplateField>
             
        </Columns>
        <PagerStyle BorderColor="#660033" />
        <RowStyle BackColor="#CCFFCC" BorderColor="#6600FF" BorderStyle="Double" />
    </asp:GridView>
<asp:Button ID="Button4" runat="server" onclick="Button4_Click" 
            Text="Export To PDF" />

Posted 3-Mar-15 4:42am

partha143

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Comments

Sergey Alexandrovich Kryukov 3-Mar-15 10:45am

Your first requirement, "please don't refer me..." is incorrect, because we have no information on what references did you look at; and we don't know if you interpreted them correctly.
—SA

partha143 4-Mar-15 0:39am

I am sorry for providing you insufficient information. I searched a lot, but I was unable to find any solution for this. It is my understanding that as I am using Item Template I need to make some changes in code (Please correct me if my understanding is wrong). Please reply back if you need more information. Thank you.

Szymon Roslowski 3-Mar-15 12:06pm

Had the same issue this morning and seems like made a similar mistake.

This line
htmlparser.Parse(sr);

takes a StreamReader not a StringReader.

var stringStream = new StreamReader(GenerateStreamFromString(html));
htmlparser.Parse(stringStream);

(...)

private Stream GenerateStreamFromString(string s)
{
var stream = new MemoryStream();
var writer = new StreamWriter(stream);
writer.Write(s);
writer.Flush();
stream.Position = 0;
return stream;
}

partha143 4-Mar-15 0:49am

Hello Szymon.
I replaced this
<pre>
htmlparser.Parse(sr);
</pre>
to this.
<pre>
var stringStream = new StreamReader(GenerateStreamFromString(sr.ToString()));
htmlparser.Parse(stringStream);
</pre>
The PDF file created and in the document this is what I got : System.IO.StringReader.
I am sorry but I am very much new to this and I know this is very silly. Please help

partha143 4-Mar-15 10:09am

Anyone please help me.

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