无法让DelTree在Inno Setup中删除文件夹 [英] Can't get DelTree to delete a folder in Inno Setup

问题描述

我有一个过程DeleteTransferFolder，在安装过程中使用Inno Setup中的BeforeInstall调用了该过程.

I have a procedure DeleteTransferFolder which is called during the install using BeforeInstall in Inno Setup.

我知道调用该过程是因为我有几个显示的MsgBox消息.但是DelTree不会删除指定的文件夹和子文件夹.

I know the procedure is called because I have a couple of MsgBox messages that show. But the DelTree does not delete the specified folder and sub-folders.

有什么想法吗?

procedure DeleteTransferFolder();
begin
  MsgBox('DeleteTransferFolder 1', mbInformation, MB_OK);

  if (FileExists ('{userdesktop}\RemedyNotes 1.0\RemedyNotes Old.remno')) then
    DelTree(ExpandConstant('{userdesktop}\RemedyNotes 1.0'), True, True, True);

  MsgBox('DeleteTransferFolder 2', mbInformation, MB_OK);    
end;

推荐答案

在FileExists行中缺少ExpandConstant调用，因此它返回false，因此不会调用DelTree.

You're missing the ExpandConstant call in the FileExists line, so it is returning false and thus the DelTree is not called.

之所以显示第二个MsgBox，是因为它不在条件if中(可能是由于缺少开始/结束对).

The second MsgBox is shown because it is out of the conditional if (maybe due to the lack of a begin/end pair).

因此，将您的代码更改为:

So, change your code to:

procedure DeleteTransferFolder();
begin
  MsgBox('DeleteTransferFolder 1', mbInformation, MB_OK);

  if (FileExists (ExpandConstant('{userdesktop}\RemedyNotes 1.0\RemedyNotes Old.remno'))) then
  begin
    DelTree(ExpandConstant('{userdesktop}\RemedyNotes 1.0'), True, True, True);
    MsgBox('DeleteTransferFolder 2', mbInformation, MB_OK);
  end;
end;

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