利用WebBrowser读取网页中表格的数据

利用WebBrowser读取网页中表格的数据
unit Unit1;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, MSHTML, StdCtrls, OleCtrls, SHDocVw;type TForm1 = class(TForm)
Button1: TButton;
WebBrowser1: TWebBrowser;
procedure FormCreate(Sender: TObject);
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementation{$R *.dfm}function GetHtmlTableCell(aTable: IHTMLTable; aRow, aCol: Integer): IHTMLElement;
var
Row: IHTMLTableRow;begin
Result := nil;
if aTable = nil then Exit;
if aTable.rows = nil then Exit;
Row := aTable.rows.item(aRow, aRow) as IHTMLTableRow;
if Row = nil then Exit;
Result := Row.cells.item(aCol, aCol) as IHTMLElement; end;function GetHtmlTable(aDoc: IHTMLDocument2; aIndex: Integer): IHTMLTable;
var
list: IHTMLElementCollection;
begin
Result := nil;
if aDoc = nil then Exit;
if aDoc.all = nil then Exit;
list := aDoc.all.tags('table') as IHTMLElementCollection; if list = nil then Exit;
Result := list.item(aIndex, aIndex) as IHTMLTable; end;function GetWebBrowserHtmlTableCellText(const AWebBrowser: TWebBrowser;
const TableIndex, RowIndex, ColIndex: Integer;
var ResValue: string): Boolean;
var
Docintf: IHTMLDocument2;
tblintf: IHTMLTable;
node: IHTMLElement;
begin
ResValue := ' ';
docintf := AWebBrowser.Document as IHTMLDocument2;
tblintf := GetHtmlTable(docintf, TableIndex);
node := GetHtmlTableCell(tblintf, RowIndex, ColIndex); Result := node <> nil;
if Result then
ResValue := Trim(node.innerText);
end;function GetHtmlTableRowHtml(aTable: IHTMLTable; aRow: Integer): IHTMLElement;
var
Row: IHTMLTableRow;
begin
Result := nil;
if aTable = nil then Exit;
if aTable.rows = nil then Exit;
Row := aTable.rows.item(aRow, aRow) as IHTMLTableRow;
if Row = nil then Exit;
Result := Row as IHTMLElement;
end;function GetWebBrowserHtmlTableCellHtml(const AWebBrowser: TWebBrowser;
const TableIndex, RowIndex, ColIndex: Integer;
var ResValue: string): Boolean;
var
Docintf: IHTMLDocument2;
tblintf: IHTMLTable;
node: IHTMLElement;
begin
ResValue := ' ';
docintf := AWebBrowser.Document as IHTMLDocument2;
tblintf := GetHtmlTable(docintf, TableIndex);
node := GetHtmlTableCell(tblintf, RowIndex, ColIndex); Result := node <> nil;
if Result then
ResValue := Trim(node.innerHTML);
end;function GeHtmlTableHtml(aTable: IHTMLTable; aRow: Integer): IHTMLElement;
var
Row: IHTMLTableRow;
begin
Result := nil;
if aTable = nil then Exit;
if aTable.rows = nil then Exit;
Row := aTable.rows.item(aRow, aRow) as IHTMLTableRow;
if Row = nil then Exit;
Result := Row as IHTMLElement;
end;function GetWebBrowserHtmlTableHtml(const AWebBrowser: TWebBrowser;
const TableIndex, RowIndex: Integer;
var ResValue: string): Boolean;
var
Docintf: IHTMLDocument2;
tblintf: IHTMLTable;
node: IHTMLElement;
begin
ResValue := ' ';
docintf := AWebBrowser.Document as IHTMLDocument2;
tblintf := GetHtmlTable(docintf, TableIndex);
node := GeHtmlTableHtml(tblintf, RowIndex);
Result := node <> nil;
if Result then
ResValue := node.innerHtml;
end;procedure TForm1.FormCreate(Sender: TObject); begin
WebBrowser1.Navigate('H:\ReadTable\00.html'); end;procedure TForm1.Button1Click(Sender: TObject); var
ResValue: string;
begin
if GetWebBrowserHtmlTableCellText(WebBrowser1, 0, 0, 0, ResValue) then
begin
ShowMessage(ResValue);
end else
begin
ShowMessage('指定的表格不存在');
end;
end;end.。