我有一个Gridview，我应该在PDF上打印。我正在使用iTextSharp dll和引用，但我有点卡住了。我打开pdf并且它是空白的，就像网格中的信息没有正确复制一样。我可能错过了使用gridview进行数据绑定的一个步骤。有人可以帮忙吗？ 这是ASP.NET代码：
<asp:GridView ID="grdContact" runat="server" DataKeyNames="id_riga"
OnRowCancelingEdit="grdContact_RowCancelingEdit"
OnRowDataBound="grdContact_RowDataBound"
OnRowEditing="grdContact_RowEditing"
OnRowUpdating="grdContact_RowUpdating"
ShowFooter="True"
OnRowCommand="grdContact_RowCommand"
OnRowDeleting="grdContact_RowDeleting"
BackColor="#DEBA84"
BorderColor="#DEBA84"
BorderStyle="None"
BorderWidth="1px"
AutoGenerateColumns="False"
CellSpacing="2"
CellPadding="4"
Width="1195px"
ForeColor="#333333" GridLines="Horizontal">
<EditRowStyle BackColor="#2461BF" />
<FooterStyle BackColor="#507CD1" ForeColor="White" Font-Bold="True" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#EFF3FB" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#F5F7FB" />
<SortedAscendingHeaderStyle BackColor="#6D95E1" />
<SortedDescendingCellStyle BackColor="#E9EBEF" />
<SortedDescendingHeaderStyle BackColor="#4870BE" />
<Columns>
<asp:TemplateField HeaderText="Id_Riga" HeaderStyle-HorizontalAlign="Left">
<EditItemTemplate>
<asp:Label ID="lblId_Riga" runat="server" Text='<%# Bind("id_riga") %>'></asp:Label>
</EditItemTemplate>
<FooterTemplate>
<asp:Label ID="lblNewId_Riga" runat="server"></asp:Label>
</FooterTemplate>
<ItemTemplate>
<asp:Label ID="lblId_Riga" runat="server" Text='<%# Bind("id_riga") %>'></asp:Label>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Left"></HeaderStyle>
</asp:TemplateField>
<asp:TemplateField HeaderText="Num_Riga" HeaderStyle-HorizontalAlign="Left">
<EditItemTemplate>
<asp:Label ID="lblnumero_posizione" runat="server" Text='<%# Bind("numero_posizione") %>'></asp:Label>
</EditItemTemplate>
<FooterTemplate>
<asp:Label ID="lblNewnumero_posizione" runat="server"></asp:Label>
</FooterTemplate>
<ItemTemplate>
<asp:Label ID="lblnumero_posizione" runat="server" Text='<%# Bind("numero_posizione") %>'></asp:Label>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Left"></HeaderStyle>
</asp:TemplateField>
<asp:TemplateField HeaderText="Quantità" HeaderStyle-HorizontalAlign="Left">
<EditItemTemplate>
<asp:TextBox ID="txtQuantita" runat="server" Text='<%# Bind("quantita") %>'></asp:TextBox>
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtNewQuantita" runat="server"></asp:TextBox>
</FooterTemplate>
<ItemTemplate>
<asp:Label ID="lblQuantita" runat="server" Text='<%# Bind("quantita") %>'></asp:Label>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Left"></HeaderStyle>
</asp:TemplateField>
<asp:TemplateField HeaderText="Unità Di Misura" HeaderStyle-HorizontalAlign="Left">
<EditItemTemplate>
<asp:TextBox ID="txtUnita_Misura" runat="server" Text='<%# Bind("Unita_Misura") %>'></asp:TextBox>
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtNewUnita_Misura" runat="server"></asp:TextBox>
</FooterTemplate>
<ItemTemplate>
<asp:Label ID="lblUnita_Misura" runat="server" Text='<%# Bind("Unita_Misura") %>'></asp:Label>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Left"></HeaderStyle>
</asp:TemplateField>
<asp:TemplateField HeaderText="Descrizione" HeaderStyle-HorizontalAlign="Left">
<EditItemTemplate>
<asp:TextBox ID="txtDescrizione" runat="server" Text='<%# Bind("Descrizione") %>'></asp:TextBox>
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtNewDescrizione" runat="server"></asp:TextBox>
</FooterTemplate>
<ItemTemplate>
<asp:Label ID="lblDescrizione" runat="server" Text='<%# Bind("Descrizione") %>'></asp:Label>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Left"></HeaderStyle>
</asp:TemplateField>
<asp:TemplateField HeaderText="Prezzo Unitario" HeaderStyle-HorizontalAlign="Left">
<EditItemTemplate>
<asp:TextBox ID="txtPrezzo_Unitario" runat="server" Text='<%# Bind("valore_unitario") %>'></asp:TextBox>
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtNewPrezzo_Unitario" runat="server"></asp:TextBox>
</FooterTemplate>
<ItemTemplate>
<asp:Label ID="lblPrezzo_Unitario" runat="server" Text='<%# Bind("valore_unitario") %>'></asp:Label>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Left"></HeaderStyle>
</asp:TemplateField>
<asp:TemplateField HeaderText="Iva" HeaderStyle-HorizontalAlign="Left">
<EditItemTemplate>
<asp:TextBox ID="txtIva" runat="server" Text='<%# Bind("iva_percento") %>'></asp:TextBox>
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtNewIva" runat="server"></asp:TextBox>
</FooterTemplate>
<ItemTemplate>
<asp:Label ID="lblIva" runat="server" Text='<%# Bind("iva_percento") %>'></asp:Label>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Left"></HeaderStyle>
</asp:TemplateField>
<asp:TemplateField HeaderText="Modifica" ShowHeader="False" HeaderStyle-HorizontalAlign="Left">
<EditItemTemplate>
<asp:LinkButton ID="lbkUpdate" runat="server" CausesValidation="False" CommandName="Update" Text="Aggiorna"></asp:LinkButton>
<asp:LinkButton ID="lnkCancel" runat="server" CausesValidation="False" CommandName="Cancel" Text="Cancella"></asp:LinkButton>
</EditItemTemplate>
<FooterTemplate>
<asp:LinkButton ID="lnkAdd" runat="server" CausesValidation="False" CommandName="Insert" Text="Inserisci"></asp:LinkButton>
</FooterTemplate>
<ItemTemplate>
<asp:LinkButton ID="lnkEdit" runat="server" CausesValidation="False" CommandName="Edit" Text="Modifica"></asp:LinkButton>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Left"></HeaderStyle>
</asp:TemplateField>
<asp:CommandField HeaderText="Cancella" ShowDeleteButton="True" ShowHeader="True" />
</Columns>
</asp:GridView>
这里有代码：
protected void creaPDF()
{
var document = new Document(PageSize.A4, 50, 50, 25, 25);
var output = new MemoryStream();
var writer = PdfWriter.GetInstance(document, output);
document.Open();
var titleFont = FontFactory.GetFont("Arial", 18, Font.BOLD);
var subTitleFont = FontFactory.GetFont("Arial", 14, Font.BOLD);
var boldTableFont = FontFactory.GetFont("Arial", 12, Font.BOLD);
var endingMessageFont = FontFactory.GetFont("Arial", 10, Font.ITALIC);
var bodyFont = FontFactory.GetFont("Arial", 12, Font.NORMAL);
var orderInfoTable = new PdfPTable(2);
orderInfoTable.HorizontalAlignment = 0;
orderInfoTable.SpacingBefore = 10;
orderInfoTable.SpacingAfter = 10;
orderInfoTable.DefaultCell.Border = 0;
orderInfoTable.SetWidths(new int[] { 1, 4 });
orderInfoTable.AddCell(new Phrase("Tipo di documento:", boldTableFont));
orderInfoTable.AddCell(txtPrenum.Text);
orderInfoTable.AddCell(new Phrase("Cognome:", boldTableFont));
orderInfoTable.AddCell(txtCognome.Text);
orderInfoTable.AddCell(new Phrase("Nome:", boldTableFont));
orderInfoTable.AddCell(txtNome.Text);
orderInfoTable.AddCell(new Phrase("Indirizzo:", boldTableFont));
orderInfoTable.AddCell(txtIndirizzo.Text);
orderInfoTable.AddCell(new Phrase("Prezzo totale:", boldTableFont));
document.Add(orderInfoTable);
document.Close();
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition", string.Format("attachment;filename=Fattura-{0}.pdf", txtPrezzoTotale.Text));
Response.BinaryWrite(output.ToArray());
}
答案 0 :(得分：1)
我完全错了。我建议不要使用iTextSharp。 Visual Studio包含一些很棒的对象：它们是Report Viewer，可以在“使用Microsoft.Reporting.WebForms;”中引用。首先必须创建一个报告，然后它必须绑定到数据源。数据源必须显示在数据集上。一块蛋糕！
答案 1 :(得分：0)
这是处理网格视图导出的代码，它来自以下文章：http://highoncoding.com/Articles/483_Exporting_GridView_to_PDF_Document.aspx
protected void ExportToPDFClick(object sender, EventArgs e)
{
Response.Clear();
StringBuilder sb = new StringBuilder();
StringWriter sw = new StringWriter(sb);
HtmlTextWriter htw = new HtmlTextWriter(sw);
gvCustomers.RenderControl(htw);
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment; filename=MypdfFile.pdf");
Document document = new Document();
PdfWriter.GetInstance(document, Response.OutputStream);
document.Open();
string html = sb.ToString();
XmlTextReader reader = new XmlTextReader(new StringReader(html));
HtmlParser.Parse(document, reader);
document.Close();
sw.Close();
Response.Flush();
Response.End();
}
但我在代码中看不到这一行，它是将网格呈现为HtmlTextWriter对象的代码。
grdContact.RenderControl(htw);