如何将SQLite.Interop.dll添加到Nuget包中，这样不会出现“无法添加引用”错误？

Question

I have a Nuget package containing test helper classes that I want to share between solutions. When I try to add the package, I get this message:

install-package : Failed to add reference to 'SQLite.Interop'.

At line:1 char:1

+ install-package 'c:\\work\\directory_name\\package_name.nu ...

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

+ CategoryInfo : NotSpecified: (:) [Install-Package], Exception

+ FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.InstallPackageCommand

My Nuget package has a C# test helper project with references to

• System.Data
• System.Data.DataSetExtensions
• System.Data.SQLite

packages.config contains

<package id="System.Data.SQLite" version="1.0.65" targetFramework="net451" />

The .NET project includes

SQLite.Interop.dll as a file

BuildAction: None

Copy to Output Directory: Copy always

SQLite.Interop.dll is included in the Nuget package.

It goes without saying that there are no references to SQLite.Interop in either the test helper project (which is in the Nuget package) or the project I am trying to add the Nuget package to.

I am using a nuspec file with nuget pack to create the package.

Here is the nuspec file definition:

<?xml version="1.0"?>
<package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd">
  <metadata>
    <id>...</id>
    <version>1.0.0</version>
    <title>...</title>
    <authors>...</authors>
    <owners>..</owners>
    <requireLicenseAcceptance>false</requireLicenseAcceptance>
    <description>...</description>
    <copyright>...</copyright>
    <releaseNotes>
    </releaseNotes>
  </metadata>
  <files>
    <file src="build\bin\**" target="lib\net45" />
    <file src="package_name.targets" target="build"/>
  </files>
</package>

There is no .sdf file in the project

Any ideas on how to set up this Nuget package, so I can add it to other projects and have SQLite.Interop.dll copied into their output directories?

Answer 1

It turns out that all that was required was a minor change to my nuspec and targets files.

By excluding SQLite.Interop.dll from the .lib directory, Nuget no longer tries to add a reference to the .dll in the target project.

I can still include the interop dll by putting it in the .content directory and then use the .targets file to include it in the target project.

Nuspec file

<?xml version="1.0"?>
<package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd">
  <metadata>
    <id>...</id>
    <version>1.0.0</version>
    <title>...</title>
    <authors>...</authors>
    <owners>..</owners>
    <requireLicenseAcceptance>false</requireLicenseAcceptance>
    <description>...</description>
    <copyright>...</copyright>
    <releaseNotes>
    </releaseNotes>
  </metadata>
  <files>
    <file src="build\bin\**" target="lib\net45" exclude="build\bin\SQLite.Interop.dll" />
    <file src="build\bin\SQLite.Interop.dll" target="content"/>
    <file src="package_name.targets" target="build"/>
  </files>
</package>

Targets file

<?xml version="1.0" encoding="utf-8"?>
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <ItemGroup>
    <None Include="$(MSBuildThisFileDirectory)\..\content\SQLite.Interop.dll">
      <Link>SQLite.Interop.dll</Link>
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
  </ItemGroup>
</Project>