如何从delphi中的网站文本框中检索文本,例如假设我键入 谷歌搜索框中的“老虎”如何从搜索框中检索文本wm_gettext或getwindowtext的工作原理? 我正在使用delphi 7
答案 0 :(得分:3)
试试这段代码。
仅适用于Internet Explorer 。在Windows Vista,IE8和Delphi 2007中测试过。
Uses
SHDocVw,
mshtml;
procedure GetTextFromEditIExplorer(ListStr: TStringList);
var
ShellWindow : IShellWindows;
Web_Browser : IWebbrowser2;
reg_Shell_window : IDispatch;
Dummy : IHTMLDocument2;
ovElements : OleVariant;
Document : Variant;
WindowsCount : Integer;
ElementsCount : Integer;
FormsCount : Integer;
begin
ShellWindow := CoShellWindows.Create; //Provides access to the collection of open Shell windows
for WindowsCount := 0 to ShellWindow.Count do //iterate through number of windows in the Shell windows collection
begin
reg_Shell_window := ShellWindow.Item(WindowsCount); //Returns the registered Shell window for a specified index.
if reg_Shell_window = nil then Continue; //go to next reg window
reg_Shell_window.QueryInterface(iWebBrowser2, Web_Browser); // determines if an interface can be used with an object
if Web_Browser <> nil then
begin
Web_Browser.Document.QueryInterface(IHTMLDocument2, Dummy);
if Dummy <> nil then
begin
Web_Browser := ShellWindow.Item(WindowsCount) as IWebbrowser2;
Document := Web_Browser;
for FormsCount := 0 to Document.forms.Length - 1 do
begin
ovElements := Document.forms.Item(FormsCount).elements;
for ElementsCount := 0 to ovElements.Length - 1 do
begin
try
if (CompareText(ovElements.item(ElementsCount).tagName, 'INPUT') = 0) and (CompareText(ovElements.item(ElementsCount).type, 'text') = 0) then
ListStr.Add('Control Name ['+ovElements.item(ElementsCount).Name+']'+' Type -> '+ovElements.item(ElementsCount).Type+' -> Value ['+ovElements.item(ElementsCount).Value+']');
except
ListStr.Add('Error Reading element n° '+IntToStr(ElementsCount));
end;
end;
end;
end;
end;
end;
end;
procedure TForm1.btn1Click(Sender: TObject);
var
List : TStringList;
begin
List:=TStringList.Create;
GetTextFromEditIExplorer(List);
ShowMessage(List.Text);
end;
修改:
不幸的是,Omar没有解决您问题的简单方法。这是因为每个浏览器使用不同的界面来与信息交互。以下是一些建议
再见。
答案 1 :(得分:0)
最简单的方法是在页面的原始HTML代码上使用正则表达式。