问题
I am calling a .net standard 2.0 library from a framework 4.7.2 test project sucessfully.
If I take my .net standard 2.0 dll (SBD.Standard) and create a new winforms project that references it then I get asked to add
Microsoft.EntityFrameworkCore,
then Microsoft.EntityFrameworkCore.SqlServer,
then Microsoft.Data.SqlClient
and then my project runs successfully. (Although it would be ideal if the extra packages were added automatically)
However trouble occurs if I try to distribute my library via a Nuget Package built using Azure DevOps.
However when I distribute the standard library via Nuget ( Using Azure DevOps to create the Nuget ) and include it in a new project I have an error.
The call stack is
System.IO.FileNotFoundException : Could not load file or assembly 'Microsoft.Data.SqlClient, Version=1.0.19269.1, Culture=neutral, PublicKeyToken=23ec7fc2d6eaa4a5' or one of its dependencies. The system cannot find the file specified.
at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerConnection.CreateDbConnection()
at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.get_DbConnection()
at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.CreateCommand(RelationalCommandParameterObject parameterObject, Guid commandId, DbCommandMethod commandMethod)
at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReader(RelationalCommandParameterObject parameterObject)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.Enumerator.InitializeReader(DbContext _, Boolean result)
at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.Execute[TState,TResult](TState state, Func`3 operation, Func`3 verifySucceeded)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.Enumerator.MoveNext()
at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source)
at SBD.Standard.Helpers.HandyFuncs.QueueCommand(ApiDbContext connect, WorkTypeEnum workType, String
The line of code that is causing the issue is
public static int QueueCommand(ApiDbContext connect, WorkTypeEnum workType, string description, int jobId, int signature, XElement elem)
{
var command =
connect.EngineCommandQueues.SingleOrDefault(
c =>
(c.Status == 0|| c.Status == 2) &&
c.Signature == signature);
I did find that I needed to install the following packages
Microsoft.EntityFrameworkCore 3.1.1
Microsoft.EntityFrameworkCore.SqlServer 3.1.1 which has a dependency on Microsoft.Data.SqlClient >=1.019269.1
I see that Microsoft.Data.SQLClient v1.0.19269.1 is intalled
I tried installing System.Linq
I see the note in Nuget for Microsoft.Data.SqlClient
When running on Windows, this library has a dependency on Microsoft.Data.SqlClient.SNI on .NET Framework
and have Microsoft.Data.SqlClient.SNI v1.0.19235.1 installed
I tried upgrading Microsoft.Data.SqlClient to 1.1 and the error changed to
System.TypeInitializationException: The type initializer for 'Microsoft.Data.SqlClient.TdsParser' threw an exception. ---> System.TypeInitializationException: The type initializer for 'Microsoft.Data.SqlClient.SNILoadHandle' threw an exception. ---> System.TypeInitializationException: The type initializer for 'Microsoft.Data.SqlClient.SNINativeMethodWrapper' threw an exception. ---> System.ComponentModel.Win32Exception: Failed to load C:\Dev2\Combridge\SBD.ComBridge\UnitTestProjectStandard\bin\Debug\x86\SNI.dll ---> System.ComponentModel.Win32Exception: The specified module could not be found
at Microsoft.Data.SqlClient.SNINativeMethodWrapper..cctor() in E:\agent1\_work\31\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\Interop\SNINativeMethodWrapper.cs:line 64
--- End of inner exception stack trace ---
at Microsoft.Data.SqlClient.SNINativeMethodWrapper.SNIInitialize()
at Microsoft.Data.SqlClient.SNILoadHandle..ctor() in E:\agent1\_work\31\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\TdsParserSafeHandles.cs:line 36
at Microsoft.Data.SqlClient.SNILoadHandle..cctor() in E:\agent1\_work\31\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\TdsParserSafeHandles.cs:line 17
--- End of inner exception stack trace ---
at Microsoft.Data.SqlClient.TdsParser..cctor() in E:\agent1\_work\31\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\TdsParser.cs:line 166
--- End of inner exception stack trace ---
at Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) in E:\agent1\_work\31\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\ProviderBase\DbConnectionPool.cs:line 1411
at Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) in E:\agent1\_work\31\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\ProviderBase\DbConnectionPool.cs:line 1310
at Microsoft.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) in E:\agent1\_work\31\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\ProviderBase\DbConnectionFactory.cs:line 357
at Microsoft.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) in E:\agent1\_work\31\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\ProviderBase\DbConnectionInternal.cs:line 773
at Microsoft.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) in E:\agent1\_work\31\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\ProviderBase\DbConnectionClosed.cs:line 72
at Microsoft.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) in E:\agent1\_work\31\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\SqlConnection.cs:line 1860
at Microsoft.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) in E:\agent1\_work\31\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\SqlConnection.cs:line 1853
at Microsoft.Data.SqlClient.SqlConnection.Open() in E:\agent1\_work\31\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\SqlConnection.cs:line 1421
at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenDbConnection(Boolean errorsExpected)
at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.Open(Boolean errorsExpected)
at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReader(RelationalCommandParameterObject parameterObject)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.Enumerator.InitializeReader(DbContext _, Boolean result)
at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.Execute[TState,TResult](TState state, Func`3 operation, Func`3 verifySucceeded)
at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable`1.Enumerator.MoveNext()
at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source)
at lambda_method(Closure , QueryContext )
at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)
at Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.Execute[TResult](Expression expression)
at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable`1 source)
[Update] Reading This GitHub post it seems it could have something to do with Azure Devops
The post mentions
Win32Exception: Failed to load C:__source_code\repo1\Simplified\bin\x86\SNI.dll So it's trying to load the 32 bit version of sni.dll and it isn't present.
That makes me suspect that you build it on a 64 bit system and then just transferred the files to the other machine. You need to publish the project for an x86 target to get the right native dependency resolved. Give it a try.
I am running Windows 10 so I dont see why it would be trying to load a 32 bit version of sni.dll
I can see in the Azure Artifiacts
Microsoft.Data.SqlClient.SNI 1.0.19235.1
[Update]
I see from this question that I need to force MSBuild to create / update a YourProject.dll.config file containing the necessary binding redirects. So Nuget should be creating that config file too. I wonder how that effects things.
My azure-pipelines.yml is
# .NET Desktop
# Build and run tests for .NET Desktop or Windows classic desktop solutions.
# Add steps that publish symbols, save build artifacts, and more:
# https://docs.microsoft.com/azure/devops/pipelines/apps/windows/dot-net
trigger:
- master
pool:
vmImage: 'windows-latest'
variables:
solution: '**/*.sln'
buildPlatform: 'Any CPU'
buildConfiguration: 'Release'
Major: '2'
Minor: '0'
Patch: '0'
steps:
- task: NuGetToolInstaller@0
inputs:
versionSpec: '>=4.3.0'
checkLatest: true
- task: NuGetCommand@2
inputs:
restoreSolution: '$(solution)'
- task: VSBuild@1
inputs:
solution: '$(solution)'
platform: '$(buildPlatform)'
configuration: '$(buildConfiguration)'
- task: NuGetCommand@2
inputs:
command: pack
packagesToPack: '**/*.csproj'
versioningScheme: byPrereleaseNumber
majorVersion: '$(Major)'
minorVersion: '$(Minor)'
patchVersion: '$(Patch)'
- task: NuGetCommand@2
inputs:
command: pack
packagesToPack: '**/*.vbproj'
versioningScheme: byPrereleaseNumber
majorVersion: '$(Major)'
minorVersion: '$(Minor)'
patchVersion: '$(Patch)'
- task: NuGetCommand@2
displayName: 'NuGet push'
inputs:
command: push
publishVstsFeed: 'SBDCommonFeed'
allowPackageConflicts: true
[Update]
I tried changing the yaml to use dotnet pack but get an error
[Update]
I tried replacing the pack section of the yaml with
- task: DotNetCoreCLI@2
inputs:
command: 'pack'
selectOrConfig: 'config'
nugetConfigPath: '$(System.DefaultWorkingDirectory)/NuGet.config'
externalEndpoints: $(externalFeedCredential)
Now I get Resource Authorization Issue
When I click the button to authorize I get a message: insufficient permissions or missing resources. Even though I am logged in as the repository owner.
I guess I need to learn what to put in externalEndpoints
[Update]
I tried this instead
- task: DotNetCoreCLI@2
inputs:
command: 'pack'
outputDir: '$(Build.ArtifactStagingDirectory)/TestDir'
Now the error becomes
error MSB4057: The target "pack" does not exist in the project.
investigating this answer
回答1:
Although it would be ideal if the extra packages were added automatically.
Assuming we have one .net standard project which depends on Microsoft.EntityFrameworkCore, Microsoft.EntityFrameworkCore.SqlServer and other packages. The expected behavior for us is to create a nuget package in whose xx.nuspec file has definitions about the dependencies.
But there's one issue about nuget pack command, it can't work well for .net core/standard project. Both nuget pack and dotnet pack can create .net standard nuget packages successfully, but pack successfully doesn't mean good package.
With the effect of the issue above, package created by nuget pack will lose some dependencies in Package.nuspec file.
(Rename xx.nupkg to xx.zip, then we can check the content inside package, we'll see the xx.nuspec file)
And above step can cause runtime error like missing assembly. So to make it ideal that the extra packages are added automatically and avoid missing reference, we recommend dotnet pack command for projects using PackageReference format. (No matter dotnet pack command locally or dotnet pack task in Azure Devops Piepilne)
来源：https://stackoverflow.com/questions/60178092/could-not-load-file-or-assembly-microsoft-data-sqlclient