[英]TEmbeddedWB.ExecScriptEx not working with JavaScript
Put a TMemo
, a TEmbeddedWB
and a TButton
on a Delphi VCL form. 将
TMemo
, TEmbeddedWB
和TButton
放在Delphi VCL表单上。
This is the code from the form unit: 这是表单单元的代码:
procedure TForm1.Button1Click(Sender: TObject);
var
vResult: OleVariant;
Para1: string;
begin
Para1 := '5'; // edPara.Text;
vResult := EmbeddedWB1.ExecScriptEx('evaluate', [Para1]);
ShowMessage('Result from the Script: ' + IntToStr(vResult));
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
EmbeddedWB1.HTMLCode.Assign(Memo1.Lines);
end;
This is the content of the Memo1.Lines
: 这是
Memo1.Lines
的内容:
<HTML>
<HEAD>
<TITLE>Test Script</TITLE>
<SCRIPT>
function evaluate(x) { alert("Hello from the script evaluate(x)"); return eval(x * x); }
</SCRIPT>
</HEAD>
<BODY> TEST Script: eval(x * x)</BODY>
</HTML>
But it does not work: vResult
is 0 after clicking the button. 但它不起作用:单击按钮后
vResult
为0。
Why it does not work? 为什么它不起作用?
The parameter type passed to ExecScriptEx
must be an Integer
in this case, not a string
: 在这种情况下,传递给
ExecScriptEx
的参数类型必须是Integer
,而不是string
:
procedure TForm1.Button1Click(Sender: TObject);
var
vResult: OleVariant;
Para1: string;
ParaInt: Integer;
begin
//Para1 := '5'; // edPara.Text;
ParaInt := 5;
vResult := EmbeddedWB1.ExecScriptEx('evaluate', [ParaInt]);
ShowMessage('Result from the Script: ' + IntToStr(vResult));
end;
Now it works! 现在它有效!
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