新手问题，关于打开文件

Question

请问怎样在delphi 7里面实现打开一个文件，并显示其路径

Answer 1

         with TOpenDialog.Create(self) do
         try
             if Execute then
             begin
                 Edit1.text:=FileName; 
             end;
         finally
           Free;
         end;

Answer 2

    with TOpenDialog.Create(self) do
        try
            if Execute then
            begin
                Edit1.text:=ExtractFilePath(FileName);
            end;
        finally
          Free;
        end;

Answer 3

啥文件？OPENDIALOG可以返回文件名

Answer 4

 with TOpenDialog.Create(self) do
        try
            if Execute then
            begin
                Edit1.text:=ExtractFilePath(FileName);
            end;
        finally
          Free;
        end;if Not FileExists(Edit1.Text) then
  application.messagebox('文件不存在','提示',mb_ok+mb_iconinformation)
else
  //执行打开文件操作
end;