HM NIS Edit制作安装包时检测是否有.net4.6环境，没有的时候自动安装。

把.net4.6安装包打包进安装程序。

关键脚本如下：

头部引用字符串对比库

!include "WordFunc.nsh"

新建一个Section，.Net4.6的文件版本号是4.6.00081，其它的版本需要在其对应的完整安装包右键属性，文件详情中查看。

Section -.NET Framework
    SetDetailsPrint both
    DetailPrint "运行环境检测中..."
    Call GetNetFrameworkVersion
    Pop $R1
    ${VersionCompare} $R1 '4.6.00081' $1
    ${If} $1 == '2'
        SetDetailsPrint textonly
        DetailPrint "正在安装所需环境..."
        ExecWait '"$INSTDIR\4.6.exe"' $R1
    ${EndIf}
SectionEnd

新建一个Function用来执行检测已安装的.Net版本（来自百度）

Function GetNetFrameworkVersion
    ;获取.Net Framework版本支持
    Push $1
    Push $0
    ReadRegDWORD $0 HKLM "SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full" "Install"
    ReadRegDWORD $1 HKLM "SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full" "Version"
    StrCmp $0 1 KnowNetFrameworkVersion +1
    ReadRegDWORD $0 HKLM "SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5" "Install"
    ReadRegDWORD $1 HKLM "SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5" "Version"
    StrCmp $0 1 KnowNetFrameworkVersion +1
    ReadRegDWORD $0 HKLM "SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.0\Setup" "InstallSuccess"
    ReadRegDWORD $1 HKLM "SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.0\Setup" "Version"
    StrCmp $0 1 KnowNetFrameworkVersion +1
    ReadRegDWORD $0 HKLM "SOFTWARE\Microsoft\NET Framework Setup\NDP\v2.0.50727" "Install"
    ReadRegDWORD $1 HKLM "SOFTWARE\Microsoft\NET Framework Setup\NDP\v2.0.50727" "Version"
    StrCmp $1 "" +1 +2
    StrCpy $1 "2.0.50727.832"
    StrCmp $0 1 KnowNetFrameworkVersion +1
    ReadRegDWORD $0 HKLM "SOFTWARE\Microsoft\NET Framework Setup\NDP\v1.1.4322" "Install"
    ReadRegDWORD $1 HKLM "SOFTWARE\Microsoft\NET Framework Setup\NDP\v1.1.4322" "Version"
    StrCmp $1 "" +1 +2
    StrCpy $1 "1.1.4322.573"
    StrCmp $0 1 KnowNetFrameworkVersion +1
    ReadRegDWORD $0 HKLM "SOFTWARE\Microsoft\.NETFramework\policy\v1.0" "Install"
    ReadRegDWORD $1 HKLM "SOFTWARE\Microsoft\.NETFramework\policy\v1.0" "Version"
    StrCmp $1 "" +1 +2
    StrCpy $1 "1.0.3705.0"
    StrCmp $0 1 KnowNetFrameworkVersion +1
    StrCpy $1 "not .NetFramework"
    KnowNetFrameworkVersion:
    Pop $0
    Exch $1
FunctionEnd

然后打包生成安装包，这样就可以在没有.Net4.6的环境的机器上安装的时候自动安装.net4.6了。