我有这个问题与iTextsharp没有呈现以下控制器asp：Literal＆amp; asp：DataList可以帮助我解决这个问题 页面标记：
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="pdfPrintPage.aspx.cs" EnableEventValidation="false" Inherits="Compudata_ProjectManager.pdfPrintPage" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<style type="text/css">
.style1
{
width: 100%;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<asp:PlaceHolder ID="ph_pdfPrint" runat="server">
<div>
<table class="style1">
<tr>
<td>
Task ID: #<asp:Label ID="lbl_taskID" runat="server" Text="Label"></asp:Label>
</td>
</tr>
<tr>
<td>
Created on:
<asp:Label ID="lbl_CreatedOn" runat="server" Text="Label"></asp:Label>
</td>
</tr>
<tr>
<td>
Defualt Tech:
<asp:Label ID="lbl_DefultTech" runat="server" Text="Label"></asp:Label>
</td>
</tr>
<tr>
<td>
Status:
<asp:Label ID="lbl_Status" runat="server" Text="Label"></asp:Label>
</td>
</tr>
<tr>
<td>
Priority:
<asp:Label ID="lbl_priorty" runat="server" Text="Label"></asp:Label>
</td>
</tr>
<tr>
<td>
Est. Time :
<asp:Label ID="lbl_estTime" runat="server" Text="Label"></asp:Label>
</td>
</tr>
<tr>
<td>
Assigned to :
<asp:ListBox ID="lb_AssignedTo" runat="server"></asp:ListBox>
</td>
</tr>
<tr>
<td>
Default Tech: <asp:Label ID="lbl_DefaultTech" runat="server" Text="Label"></asp:Label>
</td>
</tr>
<tr>
<td>
Description :
</td>
</tr>
<tr>
<td>
<asp:Literal ID="lit_description" runat="server"></asp:Literal>
</td>
</tr>
</table>
</div>
<h4>Entry</h4>
<asp:DataList ID="DataList1" runat="server" DataKeyField="billingID"
>
<ItemTemplate>
billingID:
<asp:Label ID="billingIDLabel" runat="server" Text='<%# Eval("billingID") %>' />
<br />
User Name:
<asp:Label ID="User_NameLabel" runat="server"
Text='<%# Eval("[User Name]") %>' />
<br />
taskID:
<asp:Label ID="taskIDLabel" runat="server" Text='<%# Eval("taskID") %>' />
<br />
actualTotalTime:
<asp:Label ID="actualTotalTimeLabel" runat="server"
Text='<%# Eval("actualTotalTime") %>' />
<br />
createdOn:
<asp:Label ID="createdOnLabel" runat="server" Text='<%# Eval("createdOn") %>' />
<br />
billableTypeID:
<asp:Label ID="billableTypeIDLabel" runat="server"
Text='<%# Eval("billableTypeID") %>' />
<br />
billingNumber:
<asp:Label ID="billingNumberLabel" runat="server"
Text='<%# Eval("billingNumber") %>' />
<br />
summary:
<asp:Label ID="summaryLabel" runat="server" Text='<%# Eval("summary") %>' />
<br />
isCompleted:
<asp:Label ID="isCompletedLabel" runat="server"
Text='<%# Eval("isCompleted") %>' />
<br />
note:
<asp:Label ID="noteLabel" runat="server" Text='<%# Eval("note") %>' />
<br />
dateOfService:
<asp:Label ID="dateOfServiceLabel" runat="server"
Text='<%# Eval("dateOfService") %>' />
<br />
<br />
</ItemTemplate>
</asp:DataList>
</asp:PlaceHolder>
<asp:SqlDataSource ID="assignedToUserList" runat="server" ConnectionString="<%$ ConnectionStrings:Compudata_ProjectManagerConnection %>"
SelectCommand="GetAllAssignedUserToTask" SelectCommandType="StoredProcedure">
<SelectParameters>
<asp:QueryStringParameter Name="taskID" QueryStringField="taskID" Type="Int32" />
</SelectParameters>
</asp:SqlDataSource>
<asp:SqlDataSource ID="SqlDS_TaskBilling" runat="server" SelectCommand="GetAllbillingsTimesForTask"
SelectCommandType="StoredProcedure"
ConnectionString="<%$ ConnectionStrings:Compudata_ProjectManagerConnection %>">
<SelectParameters>
<asp:QueryStringParameter DbType="Int32" Name="TaskID"
QueryStringField="taskID" />
</SelectParameters>
</asp:SqlDataSource>
</form>
</body>
</html>
C# code
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;
using System.Drawing;
using Compudata_ProjectManager.CodeFile.BOL;
namespace Compudata_ProjectManager
{
public partial class pdfPrintPage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
int taskID = Convert.ToInt32(Request.QueryString["taskID"]);
populatePage(taskID);
bindListBox();
bindDataList();
System.Threading.Thread.Sleep(3000);
PDF_Export();
}
private void bindDataList()
{
DataList1.DataSource = SqlDS_TaskBilling;
DataList1.DataBind();
}
private void bindListBox()
{
lb_AssignedTo.DataSource = assignedToUserList;
lb_AssignedTo.DataTextField = "UserName";
lb_AssignedTo.DataValueField = "UserId";
lb_AssignedTo.DataBind();
}
private void populatePage(int taskID )
{
Task task = Task.GetTaskDetail(taskID);
lbl_taskID.Text = task.TaskID.ToString();
lbl_CreatedOn.Text = task.CreatedOn.ToString();
lbl_DefultTech.Text = task.DefaultTeck;
lbl_Status.Text = task.Status.ToString();
lbl_priorty.Text = task.Priority.ToString();
lbl_estTime.Text = task.EstTime.ToString();
lbl_DefaultTech.Text = task.DefaultTeck.ToString();
lit_description.Text = task.Description.Replace("\r\n", "<br/>").ToString();
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
string decodedText = HttpUtility.HtmlDecode(e.Row.Cells[4].Text);
e.Row.Cells[4].Text = decodedText;
}
}
private void PDF_Export()
{
int taskID = Convert.ToInt32(Request.QueryString["taskID"]);
Task task = Task.GetTaskDetail(taskID);
//Set content type in response stream
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment;filename=" + task.TasKName + ".pdf");
Response.Cache.SetCacheability(HttpCacheability.NoCache);
//Render PlaceHolder to temporary stream
System.IO.StringWriter stringWrite = new StringWriter();
System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
ph_pdfPrint.RenderControl(htmlWrite);
StringReader reader = new StringReader(stringWrite.ToString());
//Create PDF document
Document doc = new Document(PageSize.A4);
HTMLWorker parser = new HTMLWorker(doc);
PdfWriter.GetInstance(doc, Response.OutputStream);
doc.Open();
try
{
////Create a footer that will display page number
parser.Parse(reader);
}
catch (Exception ex)
{
//Display parser errors in PDF.
//Parser errors will also be wisible in Debug.Output window in VS
Paragraph paragraph = new Paragraph("Error! " + ex.Message);
//paragraph.SetAlignment("center");
Chunk text = paragraph.Chunks[0] as Chunk;
doc.Add(paragraph);
}
finally
{
doc.Close();
Response.Write(doc);
}
}
public override void VerifyRenderingInServerForm(Control control)
{
}
}
}
答案 0 :(得分：1)
找到答案。我必须添加这2行
lit_description.RenderControl(htmlWrite);
DataList1.RenderControl(htmlWrite);
答案 1 :(得分：-1)
对于遇到相同问题的其他人，请记住，当使用HTMLworker尝试解析包含<hr>标记的HTML时，iTextSharp会抛出一个null异常。