如何根据属性值安装功能

Question

我有一个注册表项,可以等于两个值之一:特殊值或null.还有两个功能.

当我的注册表项等于特殊值时,安装程序必须安装第一个功能.如果注册表搜索未找到注册表项,则安装程序必须安装第二个功能.如果注册表项具有空值,则安装程序不得安装这两个功能中的任何一个.

我在做什么或者理解错了什么？如果INSTALLLEVEL = 5,SPECIALVALUE ="special",MYTREAT ="1",则必须安装第一个功能,但在这种情况下安装程序不会安装这两个功能.

<Feature Id="MyFeatures" Level="1" ConfigurableDirectory='INSTALLLOCATION' Display='expand' AllowAdvertise='no'>

  <ComponentRef Id='Empty'/>

  <Feature Id='First' Level='3' AllowAdvertise='no' ConfigurableDirectory='INSTALLLOCATION'>
    <Condition Level="0">INSTALLLEVEL=4 OR (MYTREAT="1" AND NOT SPECIALVALUE AND NOT SPECIALVALUE="")</Condition>
    <Condition Level="1">SPECIALVALUE="special" AND MYTREAT="1"</Condition>
    <ComponentRef Id="first_comp"/>                 
  </Feature>

  <Feature Id="Second" Level="4" AllowAdvertise="no" ConfigurableDirectory="INSTALLLOCATION">
    <Condition Level="0">INSTALLLEVEL=3 OR (MYTREAT="1" AND SPECIALVALUE)</Condition>
    <ComponentRef Id="second_comp"/>
  </Feature>

</Feature>

我修改了我的代码,但它仍然无法正常工作.条件问题.注册表项中有一个特殊值,但安装程序仍在跳过第一个功能.我发现只有"MYTREAT = 1"的条件不起作用.但是在日志中,客户端正在向服务器发送带有此值的MYTREAT属性.INSTALLLEVEL为1.使用按钮控件初始化MYTREAT属性,这可能是我的麻烦吗？这里有新代码:

     <Feature Id="Myfeatures" Level="3"
            ConfigurableDirectory='INSTALLLOCATION'
            Display='expand' AllowAdvertise='no'>
                <Condition Level='1'>MYTREAT="1"</Condition>
                <ComponentRef Id='Empty'/>
                <Feature Id='First' Level='3' AllowAdvertise='no'
                    ConfigurableDirectory='INSTALLLOCATION'> <!--Must be installed by default,default value of INSTALLLEVEL is 3-->
                        <Condition Level="1">MYTREAT="1" AND SPECIALVALUE="SPECIAL"</Condition>
                        <ComponentRef Id="first_comp"/>                 
                </Feature>
                <Feature Id="Second" Level="10" AllowAdvertise="no"
                    ConfigurableDirectory="INSTALLLOCATION"><!---->
                            <Condition Level="1">(MYTREAT="1" AND NOT SPECIALVALUE)</Condition>
                            <ComponentRef Id="second_comp"/>                    
                </Feature>
        </Feature>

                     ............
<Dialog Id="TreatDlg" Width="260" Height="85">    
<Control Id="Mytreat" Type="PushButton" X="50" Y="57" Width="56" Height="17" Property="MYTREAT">
       <Publish Property="MYTREAT" Value="1">1</Publish>
       <Publish Event="NewDialog" Value="VerifyReadyDlg">1</Publish>
    </Control>

PS我默认将MYTREAT初始化为1,并且正确评估了条件.为什么我不能在功能条件下使用control属性？以及如何解决我的问题!请任何帮助!

Answer 1

一个常见的错误是尝试通过INSTALLLEVEL属性控制功能.安装级别应该是静态的,您不应在安装期间更改它.

INSTALLLEVEL值被认为是不再安装功能的级别.例如,如果INSTALLLEVEL = 5,则将安装具有级别4的功能,并且不会安装级别为6的功能.

通过INSTALLLEVEL,您可以控制原始功能状态,例如:

<Feature Id="MyFeatures" Level="4" ConfigurableDirectory='INSTALLLOCATION' Display='expand' AllowAdvertise='no'>

  <!-- Feature is not installed by default -->
  <Feature Id='First' Level='6' AllowAdvertise='no' ConfigurableDirectory='INSTALLLOCATION'/>

  <!-- Feature is installed by default -->
  <Feature Id="Second" Level="4" AllowAdvertise="no" ConfigurableDirectory="INSTALLLOCATION"/>    

</Feature>

对于上述配置,您可以通过将Level设置为低于或高于INSTALLLEVEL来添加安装条件:

<Feature Id="MyFeatures" Level="4" ConfigurableDirectory='INSTALLLOCATION' Display='expand' AllowAdvertise='no'>

  <Feature Id='First' Level='6' AllowAdvertise='no' ConfigurableDirectory='INSTALLLOCATION'>
    <Condition Level="4">(MYTREAT="1") AND (SPECIALVALUE="special")</Condition>         
  </Feature>

  <Feature Id="Second" Level="4" AllowAdvertise="no" ConfigurableDirectory="INSTALLLOCATION">
    <Condition Level="6">(INSTALLLEVEL = 3) OR (MYTREAT="1" AND SPECIALVALUE)</Condition>
  </Feature>

</Feature>

如您所见,功能级别属性围绕INSTALLLEVEL而不是相反.

编辑:

在显示任何安装对话框之前评估功能条件.因此,您无法使用对话框控件(例如复选框或按钮)来调整功能.

解决方案是使用自定义操作,根据您的自定义属性修改功能操作.例如,您可以使用MsiSetFeatureState函数.您可以在此处找到自定义操作教程:http: //www.codeproject.com/KB/install/msicustomaction.aspx