From ee2a2ac65dba9a0efd21a294fc5d609c0c5badd1 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Thu, 22 Jan 2026 00:59:20 +0000
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修改内容：
1. 使用 MajorUpgrade 替代旧的 Upgrade + RemoveExistingProducts 组合
2. 设置 Schedule="afterInstallExecute" 确保新版本先安装完成再卸载旧版本
3. 添加 AllowSameVersionUpgrades="yes" 支持同版本覆盖安装
4. 添加中文降级错误提示信息

技术细节：
- 旧策略使用 RemoveExistingProducts Before="InstallInitialize"，会在安装新版本前先卸载旧版本
- 新策略使用 MajorUpgrade Schedule="afterInstallExecute"，先安装新版本再卸载旧版本
- 用户数据保存在 HKCU\Software\Sand Soft\Desktop Notes，在升级过程中会被完整保留
- 这是 WiX 推荐的最佳实践，提供更安全可靠的升级体验

https://claude.ai/code/session_01JbJbLZrdhMn7p28mbyxdoX
---
 Product.wxs | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/Product.wxs b/Product.wxs
index d9878b5..3dfcee9 100644
--- a/Product.wxs
+++ b/Product.wxs
@@ -22,13 +22,12 @@
       <Directory Id="ApplicationProgramsFolder" Name="$(var.Name)" />
     </StandardDirectory>
     <StandardDirectory Id="DesktopFolder" />
-    <Property Id="PREVIOUSVERSIONSINSTALLED" Secure="yes" />
-    <Upgrade Id="$(var.Guid)">
-      <UpgradeVersion Minimum="0.0.0.0" Maximum="255.0.0.0" Property="PREVIOUSVERSIONSINSTALLED" IncludeMinimum="yes" IncludeMaximum="no" />
-    </Upgrade>
+    <MajorUpgrade
+      DowngradeErrorMessage="不支持降级安装。请先卸载当前版本再安装旧版本。"
+      Schedule="afterInstallExecute"
+      AllowSameVersionUpgrades="yes" />
     <CustomAction Id="RunMainExe" Directory="INSTALLFOLDER" ExeCommand="[INSTALLFOLDER]$(var.Name).exe" Execute="commit" Return="asyncNoWait" />
     <InstallExecuteSequence>
-      <RemoveExistingProducts Before="InstallInitialize" />
       <Custom Action="RunMainExe" Before="InstallFinalize" />
     </InstallExecuteSequence>
   </Package>