unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, xmldom, XMLIntf, msxmldom, XMLDoc, StdCtrls;
type
TForm1 = class(TForm)
XMLDocument1: TXMLDocument;
Button1: TButton;
Button2: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
//讀取 xml 的函數
{
功能1: 傳入一個節點參數, 返回節點及其包含的所有內容;
功能2: 排除了空節點.
}
function ReadXml(node: IXMLNode): string;
var
nodeList,attrList: IXMLNodeList;
str,strName,strValue: string;
i: Integer;
begin
Result := '';
if not node.HasChildNodes then Exit;
attrList := node.AttributeNodes; {根節點的屬性列表}
nodeList := node.ChildNodes; {根節點下的子節點列表}
str := '<' + node.NodeName;
{先讀取屬性}
for i := 0 to attrList.Count - 1 do
begin
strName := attrList[i].NodeName;
strValue := attrList[i].NodeValue;
str := str + ' ' + strName + '=' + AnsiQuotedStr(strValue, '"');
end;
str := str + '>' + sLineBreak; {sLineBreak 是常量, 相當於 #13#10}
{讀取子節點}
for i := 0 to nodeList.Count - 1 do
begin
strName := nodeList[i].NodeName;
if nodeList[i].IsTextElement then
begin
strValue := nodeList[i].NodeValue;
str := str + '<' + strName + '>' + strValue + '</' + strName + '>' + sLineBreak;
end else if nodeList[i].HasChildNodes then
begin
str := str + ReadXML(nodeList[i]); {這是最關鍵的遞歸調用}
str := str + '</' + strName + '>' + sLineBreak; {封口}
end;
end;
str := str + '</' + node.NodeName + '>'; {封口}
Result := str;
end;
//調用測試(1):
procedure TForm1.Button1Click(Sender: TObject);
var
str,s1,s2: string;
begin
XMLDocument1.LoadFromFile('c:\temp\test.XML');
{必須用萬一提供的 XML 測試文件, 才能有相同的返回值}
{讀取文件頭}
s1 := AnsiQuotedStr(XMLDocument1.Version, '"'); {讀出版本, 並添加雙引號}
s2 := AnsiQuotedStr(XMLDocument1.Encoding, '"'); {讀出字符集, 並添加雙引號}
str := Format('<?XML version=%s encoding=%s?>',[s1,s2]); {這就是文件頭了}
str := str + sLineBreak + ReadXml(XMLDocument1.DocumentElement);
ShowMessage(str); {返回 XML 包含問頭在內的所有內容}
end;
//調用測試(2)
procedure TForm1.Button2Click(Sender: TObject);
var
str: string;
node: IXMLNode;
begin
XMLDocument1.LoadFromFile('c:\temp\test.XML');
node := XMLDocument1.DocumentElement.ChildNodes[0];
str := ReadXML(node);
ShowMessage(str); {返回返回根節點下第一個子節點的所有內容}
end;
end.