Delphi XML-Beispiel-Code

Transcription

1 XML-Beispiel-Code program DomCreate; uses Forms, CreateForm in 'CreateForm.pas' {Form1}; {$R *.RES} Application.Initialize; Application.CreateForm(TForm1, Form1); Application.Run;. CreateForm.pas unit CreateForm; interface uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, xmldom, XMLIntf, msxmldom, XMLDoc, DB, DBTables, ComCtrls, StdCtrls, TypInfo, ExtCtrls, Menus; type TForm1 = class(tform) btnsimple: TButton; Memo1: TMemo; btntable: TButton; btnobject: TButton; Table1: TTable; TreeView1: TTreeView; btntree: TButton; XMLDoc: TXMLDocument; Button1: TButton; btnrtti: TButton; Panel1: TPanel; Panel2: TPanel; Splitter1: TSplitter; procedure btnsimpleclick(ser: TObject); procedure btntableclick(ser: TObject); procedure btnobjectclick(ser: TObject); procedure btntreeclick(ser: TObject); Seite 1 / 9

2 procedure btnrtticlick(ser: TObject); private procedure DomToTree(XmlNode: IXMLNode; TreeNode: TTreeNode); { Private declarations } public { Public declarations } Form1: TForm1; implementation {$R *.DFM} procedure TForm1.btnSimpleClick(Ser: TObject); ixml: IDOMDocument; iroot, inode, inode2, ichild, iattribute: IDOMNode; // empty the document XMLDoc.Active := False; XMLDoc.XML.Text := ''; XMLDoc.Active := True; // root ixml := XmlDoc.DOMDocument; iroot := ixml.appchild (ixml.createelement ('xml')); // node "test" inode := iroot.appchild (ixml.createelement ('test')); inode.appchild (ixml.createelement ('test2')); ichild := inode.appchild (ixml.createelement ('test3')); ichild.appchild (ixml.createtextnode('simple value')); inode.insertbefore (ixml.createelement ('test4'), ichild); // node replication inode2 := inode.clonenode (True); iroot.appchild (inode2); // add an attribute iattribute := ixml.createattribute ('color'); iattribute.nodevalue := 'red'; inode2.attributes.setnameditem (iattribute); // show XML in memo Memo1.Lines.Text := FormatXMLData (XMLDoc.XML.Text); procedure DataSetToDOM (RootName, RecordName: string; Seite 2 / 9

3 XMLDoc: TXmlDocument; DataSet: TDataSet); inode, ichild: IXMLNode; i: Integer; DataSet.Open; DataSet.First; // root XMLDoc.DocumentElement := XMLDoc.CreateNode (RootName); // add table data while not DataSet.EOF do // add a node for each record inode := XMLDoc.DocumentElement.AddChild (RecordName); for I := 0 to DataSet.FieldCount - 1 do // add an element for each field ichild := inode.addchild (DataSet.Fields[i].FieldName); ichild.text := DataSet.Fields[i].AsString; DataSet.Next; procedure TForm1.btnTableClick(Ser: TObject); // empty the document XMLDoc.Active := False; XMLDoc.XML.Text := ''; XMLDoc.Active := True; // add the table to the DOM DataSetToDOM ('customers', 'customer', XMLDoc, Table1); // show XML in memo Memo1.Lines := XmlDoc.XML; procedure AddAttr (inode: IDOMNode; Name, Value: string); iattr: IDOMNode; iattr := inode.ownerdocument.createattribute (name); iattr.nodevalue := Value; inode.attributes.setnameditem (iattr); procedure TForm1.btnObjectClick(Ser: TObject); Seite 3 / 9

4 ixml: IDOMDocument; iroot: IDOMNode; // empty the document XMLDoc.Active := False; XMLDoc.XML.Text := ''; XMLDoc.Active := True; Delphi // root ixml := XmlDoc.DOMDocument; iroot := ixml.appchild ( ixml.createelement ('Button1')); // a few properties as attributes (might also be nodes) AddAttr (iroot, 'Name', Button1.Name); AddAttr (iroot, 'Caption', Button1.Caption); AddAttr (iroot, 'Font.Name', Button1.Font.Name); // sub-elements? AddAttr (iroot, 'Left', IntToStr (Button1.Left)); AddAttr (iroot, 'Hint', Button1.Hint); // show XML in memo Memo1.Lines := XmlDoc.XML; procedure TForm1.DomToTree (XmlNode: IXMLNode; TreeNode: TTreeNode); I: Integer; NewTreeNode: TTreeNode; NodeText: string; AttrNode: IXMLNode; // skip text nodes and other special cases if not (XmlNode.NodeType = ntelement) then Exit; // add the node itself NodeText := XmlNode.NodeName; if XmlNode.IsTextElement then NodeText := NodeText + ' = ' + XmlNode.Text; NewTreeNode := TreeView1.Items.AddChild(TreeNode, NodeText); // add attributes for I := 0 to xmlnode.attributenodes.count - 1 do AttrNode := xmlnode.attributenodes.nodes[i]; TreeView1.Items.AddChild(NewTreeNode, '[' + AttrNode.NodeName + ' = "' + AttrNode.Text + '"]'); // add each child node if XmlNode.HasChildNodes then Seite 4 / 9

5 for I := 0 to xmlnode.childnodes.count - 1 do DomToTree (xmlnode.childnodes.nodes [I], NewTreeNode); procedure TForm1.btnTreeClick(Ser: TObject); TreeView1.Items.BeginUpdate; try TreeView1.Items.Clear; DomToTree (XmlDoc.DocumentElement, nil); TreeView1.FullExpand; finally TreeView1.Items.EndUpdate; procedure ComponentToDOM (inode: IXmlNode; Comp: TPersistent); nprops, i: Integer; PropList: PPropList; Value: Variant; newnode: IXmlNode; // get list of properties nprops := GetTypeData (Comp.ClassInfo)^.PropCount; GetMem (PropList, nprops * SizeOf(Pointer)); try GetPropInfos (Comp.ClassInfo, PropList); // shortcut: use iants... for i := 0 to nprops - 1 do Value := GetPropValue (Comp, PropList [i].name); NewNode := inode.addchild(proplist [i].name); NewNode.Text := Value; if (PropList [i].proptype^.kind = tkclass) and (Value 0) then if TObject (Integer(Value)) is TComponent then NewNode.Text := TComponent (Integer(Value)).Name else // TPersistent but not TComponent: recurse ComponentToDOM (newnode, TObject (Integer(Value)) as TPersistent); finally FreeMem (PropList); procedure TForm1.btnRTTIClick(Ser: TObject); Seite 5 / 9

6 // empty the document XMLDoc.Active := False; XMLDoc.XML.Text := ''; XMLDoc.Active := True; Delphi // create the root for the object and adds its properties XMLDoc.DocumentElement := XMLDoc.CreateNode(self.ClassName); ComponentToDOM (XMLDoc.DocumentElement, self); // show XML in memo Memo1.Lines := XmlDoc.XML;. CreateForm.dfm object Form1: TForm1 Left = 192 Top = 107 Width = 571 Height = 412 Caption = 'DomCreate' Color = clbtnface Font.Charset = DEFAULT_CHARSET Font.Color = clwindowtext Font.Height = -11 Font.Name = 'MS Sans Serif' Font.Style = [] OldCreateOrder = False PixelsPerInch = 96 TextHeight = 13 object Panel1: TPanel Left = 0 Top = 0 Width = 97 Height = 385 Align = alleft TabOrder = 0 object btnobject: TButton Top = 72 Caption = 'Object' TabOrder = 0 OnClick = btnobjectclick Seite 6 / 9

7 object btnsimple: TButton Top = 8 Caption = 'Simple' TabOrder = 1 OnClick = btnsimpleclick object btntable: TButton Top = 40 Caption = 'Table' TabOrder = 2 OnClick = btntableclick object btntree: TButton Top = 184 Caption = 'Tree' TabOrder = 3 OnClick = btntreeclick object Button1: TButton Top = 216 Caption = 'Button1' TabOrder = 4 object btnrtti: TButton Top = 104 Caption = 'RTTI' TabOrder = 5 OnClick = btnrtticlick object Panel2: TPanel Left = 97 Top = 0 Delphi Seite 7 / 9

8 Width = 466 Height = 385 Align = alclient BevelOuter = bvnone TabOrder = 1 object Splitter1: TSplitter Left = 0 Top = 185 Width = 466 Height = 3 Cursor = crvsplit Align = altop object TreeView1: TTreeView Left = 0 Top = 188 Width = 466 Height = 197 Align = alclient Indent = 19 TabOrder = 0 object Memo1: TMemo Left = 0 Top = 0 Width = 466 Height = 185 Align = altop TabOrder = 1 object Table1: TTable DatabaseName = 'DBDEMOS' TableName = 'customer.db' Left = 232 Top = 72 object XMLDoc: TXMLDocument Active = True NodeIndentStr = ' ' Options = [donodeautocreate, donodeautoindent, doattrnull, doautoprefix, donamespaced ecl] Left = 296 Top = 72 DOMVorDesc = 'MSXML' Seite 8 / 9

9 Powered by TCPDF ( Delphi Eindeutige ID: #0 Verfasser: Markus Stein Letzte Änderung der FAQ: :22 Seite 9 / 9