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我一直试图让这个工作很长一段时间，现在我希望有人能帮我解决这个问题。我试图从我的ASCX控件（如下所示合并到我的ASPX页面）中保存两个ListView到一个PDF文件。我相信问题在于这两行代码，因为我在保存时遇到'文档没有页面'错误。任何想法将不胜感激！在此先感谢...iTextSharp输出为PDF
ListView lv1 = (ListView)TagCloudControl1.FindControl("ListView1");
ListView lv2 = (ListView)TagCloudControl1.FindControl("ListView2");
ASPX页面：
<%@ Register Src="~/tagcloud.ascx" TagName="TagCloudControl" TagPrefix="TagCloud" %>
...
<TagCloud:TagCloudControl ID="TagCloudControl1" runat="server" />
C＃：
private void GeneratePDF(string path, string fileName, bool download, string text) {
var document = new Document();
try{
if (download) {
PdfWriter.GetInstance(document, Response.OutputStream);
} else {
PdfWriter.GetInstance(document, new FileStream(path + fileName, FileMode.Create));
}
StringBuilder strB = new StringBuilder();
document.Open();
if (text.Length.Equals(0)) {
TagCloudControl1.BindTagCloud();
using (StringWriter sWriter = new StringWriter(strB)) {
using (HtmlTextWriter htWriter = new HtmlTextWriter(sWriter)) {
//var lv1 = (TagCloudControl)ListView.FindControl("ListView1");
//var lv2 = (TagCloudControl)ListView.FindControl("ListView2");
ListView lv1 = (ListView)TagCloudControl1.FindControl("ListView1");
ListView lv2 = (ListView)TagCloudControl1.FindControl("ListView2");
lv1.RenderControl(htWriter);
lv2.RenderControl(htWriter);
}
}
} else {
strB.Append(text);
}
using (TextReader sReader = new StringReader(strB.ToString())) {
List<IElement> list = HTMLWorker.ParseToList(sReader, new StyleSheet());
foreach (IElement elm in list) {
document.Add(elm);
}
}
} catch (Exception ee) {
ee.ToString();
} finally {
document.Close();
}
}
protected void GeneratePDFAndDownload (object sender, EventArgs e) {
string fileName = "RetroCloud_" + proj_name + "_" + DateTime.Now.Ticks + ".pdf";
GeneratePDF("", fileName, true, "");
Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment; filename=" + fileName);
Response.Flush();
Response.End();
}
ASCX控制：
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="tagcloud.ascx.cs" Inherits="tagcloud" %>
<div style="padding-left: 25px; padding-right: 25px; text-align: center;">
<asp:listview runat="server" ID="ListView1" ItemPlaceholderID="itemPlaceHolder">
<LayoutTemplate>
<asp:PlaceHolder runat="server" ID="itemPlaceHolder"></asp:PlaceHolder>
</LayoutTemplate>
<ItemTemplate>
<a href='<%# GenerateNegativeStoryDetails(Eval("Tag")) %>' style="color: #ff0000; text-align: center; margin: 15px; line-height: 30px; text-decoration:none; font-size: <%# GetTagSize(Convert.ToDouble(Eval("weight"))) %>"><%# Eval("Tag") %></a>
</ItemTemplate>
<EmptyDataTemplate>
<asp:Label ID="negative_tags" runat="server" style="color: #ff0000;" Text="[NO NEGATIVE TAGS FOUND]"></asp:Label>
</EmptyDataTemplate>
</asp:listview>
</div>
<br />
<div style="padding-left: 25px; padding-right: 25px; text-align: center;">
<asp:listview runat="server" ID="ListView2" ItemPlaceholderID="itemPlaceHolder">
<LayoutTemplate>
<asp:PlaceHolder runat="server" ID="itemPlaceHolder"></asp:PlaceHolder>
</LayoutTemplate>
<ItemTemplate>
<a href='<%# GeneratePositiveStoryDetails(Eval("Tag")) %>' style="color: #33cc00; text-align: center; margin: 15px; line-height: 30px; text-decoration:none; font-size: <%# GetTagSize(Convert.ToDouble(Eval("weight"))) %>"><%# Eval("Tag") %></a>
</ItemTemplate>
<EmptyDataTemplate>
<asp:Label ID="positive_tags" runat="server" style="color: #33cc00;" Text="[NO POSITIVE TAGS FOUND]"></asp:Label>
</EmptyDataTemplate>
</asp:listview>
</div>
ASCX CS FILE：
string proj_id, proj_name, iteration;
protected void Page_Load(object sender, EventArgs e)
{
proj_name = Request.QueryString["project"].ToString();
proj_id = Request.QueryString["id"].ToString();
if (String.IsNullOrEmpty((string)Session["iteration"]))
iteration = "0";
else
iteration = (string)Session["iteration"];
BindTagCloud();
}
private void BindTagCloud()
{
int pro_id = Convert.ToInt32(proj_id);
int iteration_id = Convert.ToInt32(iteration);
....
if (iteration_id != 0)
{
ListView1.DataSource = tagCloudNegativeIteration;
ListView1.DataBind();
ListView2.DataSource = tagCloudPositiveIteration;
ListView2.DataBind();
}
else
{
ListView1.DataSource = tagCloudNegative;
ListView1.DataBind();
ListView2.DataSource = tagCloudPositive;
ListView2.DataBind();
}