如何从模板中读取表格，然后用iTextSharp填充它们？

Question

我正在尝试使用iTextSharp阅读PDF模板，然后自动填写表单。该模板是使用LiveCycle Developer创建的。我不知道下面的代码有什么问题，但它不会更改表单值。

有人能告诉我我做错了什么吗？很难为iText的C＃版本找到很好的文档。

private void button_fill_Click(object sender, EventArgs e) 
{ 
    OpenFileDialog ofd = new OpenFileDialog(); 
    if (ofd.ShowDialog() == DialogResult.OK) 
    { 
     using (MemoryStream ms = new MemoryStream()) 
     { 
      PdfReader pdfReader = new PdfReader(ofd.FileName); 
      PdfStamper pdfStamp = new PdfStamper(pdfReader, ms); 
      AcroFields fields = pdfStamp.AcroFields; 
      foreach (KeyValuePair<string, AcroFields.Item> f in fields.Fields) 
      { 
       // this message is never displayed 
       MessageBox.Show("key: " + f.Key); 
      } 

      //textfields 
      // this one is working, and showing the value saved in the template 
      MessageBox.Show("FakeDatabase_Table1_Company: " + fields.GetField("FakeDatabase_Table1_Company")); 
      // this part returns a false value, and not changing the field 
      MessageBox.Show("Set: " + fields.SetField("FakeDatabase_Table1_Company", "Testing")); 

      try 
      { 
       fields.SetField("FakeDatabase_Table1_Company", "Coca-Cola"); 
      } 
      catch (Exception e2) { MessageBox.Show(e2.Message); } 

      pdfReader.Close(); 
      pdfStamp.FormFlattening = true; 
      pdfStamp.FreeTextFlattening = true; 
      pdfStamp.Writer.CloseStream = false; 
      pdfStamp.Close(); 
      Process.Start(ofd.FileName); 
     } 
    } 
} 

的try/catch语句从不输出任何东西..也没有将它设置任何

Answer 1

原来的代码是罚款。问题是pdf是动态的。我的代码现在几乎可以工作，因为我将pdf改为静态的。我现在可以阅读AcroFields，这是给我的问题。它实际上并没有用填充的值来保存表格，但这是迄今为止我所拥有的。

public void loadPDF(String path) 
     { 
      using (MemoryStream ms = new MemoryStream()) 
      { 
       PdfReader pdfReader = new PdfReader(path); 
       PdfStamper pdfStamp = new PdfStamper(pdfReader, ms); 
       AcroFields fields = pdfStamp.AcroFields; 
       List<String> Keys = new List<string>(); 
       Boolean empty = true; 
       foreach (var field in fields.Fields) 
       { 
        empty = false; 
        Keys.Add(field.Key); 
       } 
       if (empty) MessageBox.Show("The template does not have any form fields in it."); 
       foreach (String k in Keys) 
       { 
        fields.SetField(k, "Testing"); 
       } 

       pdfReader.Close(); 
       pdfStamp.FormFlattening = true; 
       pdfStamp.FreeTextFlattening = true; 
       pdfStamp.Writer.CloseStream = false; 
       pdfStamp.Close(); 
       Process.Start(path); 
      } 
     }