如何使用iTextSharp將XML轉換爲PDF？

Question

如何使用iTextSharp將XML轉換爲PDF？ iTextSharp的當前XML到PDF格式顯然是過時的，不起作用。所以我開始解決這個問題，但我無法轉化它。任何人都可以幫助我。

<?xml version="1.0" encoding="utf-8" ?> 
<catalog> 
    <cd> 
    <SR.No>14</SR.No> 
    <test>loss test</test> 
    <code>ISO-133</code> 
    <unit>gm</unit> 
    <sampleid>36</sampleid> 
    <boreholeid>21</boreholeid> 
    <pieceno>63</pieceno> 
    </cd> 
    <cd> 
    <SR.No>24</SR.No> 
    <test>sand</test> 
    <code>ISO-133</code> 
    <unit>gm</unit> 
    <sampleid>71</sampleid> 
    <boreholeid>22</boreholeid> 
    <pieceno>23</pieceno> 
    </cd> 
    <cd> 
    <SR.No>25</SR.No> 
    <test>clay</test> 
    <code>ISO-133</code> 
    <unit>mg</unit> 
    <sampleid>52</sampleid> 
    <boreholeid>21</boreholeid> 
    <pieceno>36</pieceno> 
    </cd> 
</catalog> 

Answer 1

這對你自己來說確實很微不足道。你沒有指定一種語言，所以下面的示例使用VB.Net，因爲（我認爲）它更容易處理XML。查看代碼評論以獲取更多詳細信息。這是針對iTextSharp 5.4.4，但應該幾乎適用於任何版本。

''//Sample XML 
Dim TextXML = <?xml version="1.0" encoding="utf-8"?> 
       <catalog> 
        <cd> 
         <SR.No>14</SR.No> 
         <test>loss test</test> 
         <code>ISO-133</code> 
         <unit>gm</unit> 
         <sampleid>36</sampleid> 
         <boreholeid>21</boreholeid> 
         <pieceno>63</pieceno> 
        </cd> 
        <cd> 
         <SR.No>24</SR.No> 
         <test>sand</test> 
         <code>ISO-133</code> 
         <unit>gm</unit> 
         <sampleid>71</sampleid> 
         <boreholeid>22</boreholeid> 
         <pieceno>23</pieceno> 
        </cd> 
        <cd> 
         <SR.No>25</SR.No> 
         <test>clay</test> 
         <code>ISO-133</code> 
         <unit>mg</unit> 
         <sampleid>52</sampleid> 
         <boreholeid>21</boreholeid> 
         <pieceno>36</pieceno> 
        </cd> 
       </catalog> 

''//File to write to 
Dim TestFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "Test.pdf") 

''//Standard PDF creation, nothing special here 
Using fs As New FileStream(TestFile, FileMode.Create, FileAccess.Write, FileShare.None) 
    Using doc As New Document() 
     Using writer = PdfWriter.GetInstance(doc, fs) 
      doc.Open() 

      ''//Create a table with one column for every child node of <cd> 
      Dim T As New PdfPTable(TextXML.<catalog>.<cd>.First.Nodes.Count) 

      ''//Loop through the first item to output column headers 
      For Each N In TextXML.<catalog>.<cd>.First.Elements 
       T.AddCell(N.Name.ToString()) 
      Next 

      ''//Loop through each CD row (this is so we can call complete later on) 
      For Each CD In TextXML.<catalog>.Elements 
       ''//Loop through each child of the current CD 
       For Each N In CD.Elements 
        T.AddCell(N.Value) 
       Next 

       ''//Just in case any rows have too few cells fill in any blanks 
       T.CompleteRow() 
      Next 

      ''//Add the table to the document 
      doc.Add(T) 

      doc.Close() 
     End Using 
    End Using 
End Using 

編輯

這裏有一個C＃版本。我已經包含了一個幫助器方法來根據您的模板創建一個大的XML文檔來顯示頁面溢出。 PdfPTable會自動發送多個頁面。您可以指定應被視爲「標題」的行數，以便在後續頁面上重複。你可能會想也適用於一些格式規則，但你應該能夠找到那些在線（尋找PdfPTable.DefaultCell）

private XDocument createXml() { 
    //Create our sample XML document 
    var xml = new XDocument(new XDeclaration("1.0", "utf-8", "yes")); 

    //Add our root node 
    var root = new XElement("catalog"); 
    //All child nodes 
    var nodeNames = new[] { "SR.No", "test", "code", "unit", "sampleid", "boreholeid", "pieceno" }; 
    XElement cd; 

    //Create a bunch of <cd> items 
    for (var i = 0; i < 1000; i++) { 
     cd = new XElement("cd"); 
     foreach (var nn in nodeNames) { 
      cd.Add(new XElement(nn) { Value = String.Format("{0}:{1}", nn, i.ToString()) }); 
     } 
     root.Add(cd); 
    } 

    xml.Add(root); 

    return xml; 
} 

private void doWork() { 
    //Sample XML 
    var xml = createXml(); 

    //File to write to 
    var testFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "test.pdf"); 

    //Standard PDF creation, nothing special here 
    using (var fs = new FileStream(testFile, FileMode.Create, FileAccess.Write, FileShare.None)) { 
     using (var doc = new Document()) { 
      using (var writer = PdfWriter.GetInstance(doc, fs)) { 
       doc.Open(); 

       //Count the columns 
       var columnCount = xml.Root.Elements("cd").First().Nodes().Count(); 

       //Create a table with one column for every child node of <cd> 
       var t = new PdfPTable(columnCount); 

       //Flag that the first row should be repeated on each page break 
       t.HeaderRows = 1; 

       //Loop through the first item to output column headers 
       foreach (var N in xml.Root.Elements("cd").First().Elements()) { 
        t.AddCell(N.Name.ToString()); 
       } 

       //Loop through each CD row (this is so we can call complete later on) 
       foreach (var CD in xml.Root.Elements()) { 
        //Loop through each child of the current CD. Limit the number of children to our initial count just in case there are extra nodes. 
        foreach (var N in CD.Elements().Take(columnCount)) { 
         t.AddCell(N.Value); 
        } 
        //Just in case any rows have too few cells fill in any blanks 
        t.CompleteRow(); 
       } 

       //Add the table to the document 
       doc.Add(t); 

       doc.Close(); 
      } 
     } 
    } 
}