Connection to sql server in xamarin

Question

I have my data access layer developed for my wcf and win forms applications. I just started Xamarin forms application and want to connect to sql server using my current data access layer . Nevertheless i got an issue when trying to connection.Open() and getting following error. Is there any way to do that?

System.Net.Security.Native assembly:<unknown assembly> type:<unknown type> member:(null)\n  at (wrapper managed-to-native) Interop+NetSecurityNative.ImportPrincipalName(Interop/NetSecurityNative/Status&,string,int,Microsoft.Win32.SafeHandles.SafeGssNameHandle&)\n  at Microsoft.Win32.SafeHandles.SafeGssNameHandle.CreatePrincipal (System.String name) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/Microsoft/Win32/SafeHandles/GssSafeHandles.cs:39 \n  at System.Net.Security.SafeDeleteNegoContext..ctor (System.Net.Security.SafeFreeNegoCredentials credential, System.String targetName) [0x0001c] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/System/Net/Security/Unix/SafeDeleteNegoContext.cs:46 \n  at System.Net.Security.NegotiateStreamPal.EstablishSecurityContext (System.Net.Security.SafeFreeNegoCredentials credential, System.Net.Security.SafeDeleteContext& context, System.String targetName, System.Net.ContextFlagsPal inFlags, System.Net.Security.SecurityBuffer inputBuffer, System.Net.Security.SecurityBuffer outputBuffer, System.Net.ContextFlagsPal& outFlags) [0x0000b] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/System/Net/Security/NegotiateStreamPal.Unix.cs:166 \n  at System.Net.Security.NegotiateStreamPal.InitializeSecurityContext (System.Net.Security.SafeFreeCredentials credentialsHandle, System.Net.Security.SafeDeleteContext& securityContext, System.String spn, System.Net.ContextFlagsPal requestedContextFlags, System.Net.Security.SecurityBuffer[] inSecurityBufferArray, System.Net.Security.SecurityBuffer outSecurityBuffer, System.Net.ContextFlagsPal& contextFlags) [0x00037] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/System/Net/Security/NegotiateStreamPal.Unix.cs:240 \n  at System.Data.SqlClient.SNI.SNIProxy.GenSspiClientContext (System.Data.SqlClient.SNI.SspiClientContextStatus sspiClientContextStatus, System.Byte[] receivedBuff, System.Byte[]& sendBuff, System.Byte[] serverName) [0x0006b] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/System.Data.SqlClient/src/System/Data/SqlClient/SNI/SNIProxy.cs:113 \n  at System.Data.SqlClient.SNI.TdsParserStateObjectManaged.GenerateSspiClientContext (System.Byte[] receivedBuff, System.UInt32 receivedLength, System.Byte[]& sendBuff, System.UInt32& sendLength, System.Byte[] _sniSpnBuffer) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/System.Data.SqlClient/src/System/Data/SqlClient/TdsParserStateObjectManaged.cs:240 \n  at System.Data.SqlClient.TdsParser.SNISSPIData (System.Byte[] receivedBuff, System.UInt32 receivedLength, System.Byte[]& sendBuff, System.UInt32& sendLength) [0x00007] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/System.Data.SqlClient/src/System/Data/SqlClient/TdsParser.cs:6488 \nSystem.Net.Security.Native assembly:<unknown assembly> type:<unknown type> member:(null)\n  at (wrapper managed-to-native) Interop+NetSecurityNative.ImportPrincipalName(Interop/NetSecurityNative/Status&,string,int,Microsoft.Win32.SafeHandles.SafeGssNameHandle&)\n  at Microsoft.Win32.SafeHandles.SafeGssNameHandle.CreatePrincipal (System.String name) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/Microsoft/Win32/SafeHandles/GssSafeHandles.cs:39 \n  at System.Net.Security.SafeDeleteNegoContext..ctor (System.Net.Security.SafeFreeNegoCredentials credential, System.String targetName) [0x0001c] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/System/Net/Security/Unix/SafeDeleteNegoContext.cs:46 \n  at System.Net.Security.NegotiateStreamPal.EstablishSecurityContext (System.Net.Security.SafeFreeNegoCredentials credential, System.Net.Security.SafeDeleteContext& context, System.String targetName, System.Net.ContextFlagsPal inFlags, System.Net.Security.SecurityBuffer inputBuffer, System.Net.Security.SecurityBuffer outputBuffer, System.Net.ContextFlagsPal& outFlags) [0x0000b] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/System/Net/Security/NegotiateStreamPal.Unix.cs:166 \n  at System.Net.Security.NegotiateStreamPal.InitializeSecurityContext (System.Net.Security.SafeFreeCredentials credentialsHandle, System.Net.Security.SafeDeleteContext& securityContext, System.String spn, System.Net.ContextFlagsPal requestedContextFlags, System.Net.Security.SecurityBuffer[] inSecurityBufferArray, System.Net.Security.SecurityBuffer outSecurityBuffer, System.Net.ContextFlagsPal& contextFlags) [0x00037] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/System/Net/Security/NegotiateStreamPal.Unix.cs:240 \n  at System.Data.SqlClient.SNI.SNIProxy.GenSspiClientContext (System.Data.SqlClient.SNI.SspiClientContextStatus sspiClientContextStatus, System.Byte[] receivedBuff, System.Byte[]& sendBuff, System.Byte[] serverName) [0x0006b] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/System.Data.SqlClient/src/System/Data/SqlClient/SNI/SNIProxy.cs:113 \n  at System.Data.SqlClient.SNI.TdsParserStateObjectManaged.GenerateSspiClientContext (System.Byte[] receivedBuff, System.UInt32 receivedLength, System.Byte[]& sendBuff, System.UInt32& sendLength, System.Byte[] _sniSpnBuffer) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/System.Data.SqlClient/src/System/Data/SqlClient/TdsParserStateObjectManaged.cs:240 \n  at System.Data.SqlClient.TdsParser.SNISSPIData (System.Byte[] receivedBuff, System.UInt32 receivedLength, System.Byte[]& sendBuff, System.UInt32& sendLength) [0x00007] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/System.Data.SqlClient/src/System/Data/SqlClient/TdsParser.cs:6488

Answer 1

Sorry I can't comment to answer yet (not enough reputation), but can you make sure your code is .NET Standard (preferably 2.0 compliant) if using it with Xamarin as a portable class library...Xamarin can't use just any .NET dll unfortunately...also, since I suspect that this might not be (the only) an issue for you could you give more info on the structure of your solution, maybe it's an issue with an assembly not being referenced and being linked out of the final build (ie could you make sure it's not working in both Debug as well as Release mode - if you've not modified the Build settings - or just make sure the linker is not going through your code when trying to reduce the final build package size).