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Azure SQL Database - Transient Fault Handling doesn't work

I tried to use SQL Azure Transient fault handling, but it doesn't seem to work. My Web Service still throws a transient error. Here is my code:
public int ExecuteSqlCmd(string sql, object[] parameters)
{
return (new RetryPolicy<SqlDatabaseTransientErrorDetectionStrategy>(10, TimeSpan.FromSeconds(0.5), TimeSpan.FromSeconds(0.5))).ExecuteAction<int>(() =>
{
return this.Database.ExecuteSqlCommand(sql, sqlParams);
});
}
Every now and then, it still throws this error:
System.Data.Entity.Core.EntityException: An exception has been raised that is likely due to a transient failure. If you are connecting to a SQL Azure database consider using SqlAzureExecutionStrategy. ---> System.Data.SqlClient.SqlException: Transaction (Process ID 84) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction.
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption, Boolean shouldCacheForAlwaysEncrypted)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry)
at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry)
at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
at System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch[TTarget,TInterceptionContext,TResult](TTarget target, Func`3 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed)
at System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.NonQuery(DbCommand command, DbCommandInterceptionContext interceptionContext)
at System.Data.Entity.Core.Objects.ObjectContext.ExecuteStoreCommandInternal(String commandText, Object[] parameters)
at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)
at System.Data.Entity.Core.Objects.ObjectContext.<>c__DisplayClass174_0.<ExecuteStoreCommand>b__0()
at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)
--- End of inner exception stack trace ---
at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)
...
...
...
Any idea why? I have spent days trying to figure out the solution to this problem.
Thanks

SqlDataException: Incorrect Syntax near '='

I am trying get the data from database but I am getting this error. I am sure I am missing some simple logic but I couldn't figure out what's wrong with the query as it is working fine directly on DB.
SqlCommand retrievedgeids = new SqlCommand("Select edgeid from Edges where fromIntersection = #fromid and toIntersection = #toid", sqlconnection);
retrievedgeids.Parameters.AddWithValue("#fromid", fromid);
retrievedgeids.Parameters.AddWithValue("#toid", toid);
using (SqlDataReader reader = retrievedgeids.ExecuteReader())
{
while (reader.Read())
{
if (reader["edgeid"] != System.DBNull.Value)
{
edgeids.Add(Convert.ToInt32(reader["edgeid"]));
}
}
}
And this is the error message:
System.Data.SqlClient.SqlException (0x80131904): Incorrect syntax near '='.
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action1 wrapCloseInAction)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action1 wrapCloseInAction)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
at System.Data.SqlClient.SqlDataReader.TryConsumeMetaData()
at System.Data.SqlClient.SqlDataReader.get_MetaData()
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption, Boolean shouldCacheForAlwaysEncrypted)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader()
at NewRNG.UpdatedRNG.getalledges() in C:\Users\ssindhu\source\repos\NewRNG\NewRNG\UpdatedRNG.cs:line 148
ClientConnectionId:36446293-901d-49a3-85a7-da73e2acaedd
Error Number:102,State:1,Class:15
Can you help me figure out this issue?

Here is the link to the Microsoft documentation for the Parameter class you are using :
https://learn.microsoft.com/en-us/dotnet/api/system.data.sqlclient.sqlparameter?view=dotnet-plat-ext-5.0
You would need to change your code to something like this :
System.Data.SqlClient.SqlCommand retrievedgeids = new System.Data.SqlClient.SqlCommand("Select edgeid from Edges where fromIntersection = #fromid and toIntersection = #toid", sqlconnection);
System.Data.SqlClient.SqlParameter fromIdParameter = new System.Data.SqlClient.SqlParameter("fromid", SqlDbType.Int);
fromIdParameter.Value = fromId;
retrievedgeids.Parameters.Add(fromIdParameter);

Use Parameters.Add instead of AddWithValue like this:
retrievedgeids.Parameters.Add("#fromid", SqlDbType.Int);
retrievedgeids.Parameters["#fromid"].Value = fromid;

SQL connection gets implicitly closed on thread abort

I'm opening SQL connection then running many SQL scripts in it. My program doesn't close connection at any spot but if I call Thread.Abort() then the connection sometimes gets closed (50/50).
The code looks like:
connection.Open();
try
{
// running various SQL script, no one is closing connection
// calling Thread.Abort() at this point
}
catch (ThreadAbortException ex)
{
Thread.ResetAbort();
// connection sometimes has state "Closed" here!!!
new SqlCommand("blahblah", connection).ExecuteNonQuery(); // doesn't work then
}
Why it's happening? What should I do to have it alive until I explicitly close it?
This is call stack when connection is closed:
at SNIReadSyncOverAsync(SNI_ConnWrapper* , SNI_Packet** , Int32 )
at SNINativeMethodWrapper.SNIReadSyncOverAsync(SafeHandle pConn, IntPtr& packet, Int32 timeout)
at System.Data.SqlClient.TdsParserStateObject.ReadSniSyncOverAsync()
at System.Data.SqlClient.TdsParserStateObject.TryReadNetworkPacket()
at System.Data.SqlClient.TdsParserStateObject.TryPrepareBuffer()
at System.Data.SqlClient.TdsParserStateObject.TryReadByte(Byte& value)
at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
at System.Data.SqlClient.SqlDataReader.TryConsumeMetaData()
at System.Data.SqlClient.SqlDataReader.get_MetaData()
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption, Boolean shouldCacheForAlwaysEncrypted)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader()

Entity Framework 7 Beta5 - DbUpdateException resolution

I am having issues using the Entity Framework for simple CRUD operations. I do believe everything is configured correctly, but when I call SaveChanges after adding an entity to a DbSet, a DbUpdateException is thrown. I'm not quite sure which code to provide, so I'm going to include the exception detail and the logic involved.
Exception detail:
Microsoft.Data.Entity.Update.DbUpdateException occurred
HResult=-2146233088
Message=An error occurred while updating the entries. See the inner exception for details.
Source=EntityFramework.Relational
StackTrace:
at Microsoft.Data.Entity.Relational.Update.ReaderModificationCommandBatch.Execute(RelationalTransaction transaction, IRelationalTypeMapper typeMapper, DbContext context, ILogger logger)
at Microsoft.Data.Entity.Relational.Update.BatchExecutor.Execute(IEnumerable`1 commandBatches, IRelationalConnection connection)
at Microsoft.Data.Entity.Relational.RelationalDataStore.SaveChanges(IReadOnlyList`1 entries)
at Microsoft.Data.Entity.ChangeTracking.Internal.StateManager.SaveChanges(IReadOnlyList`1 entriesToSave)
at Microsoft.Data.Entity.ChangeTracking.Internal.StateManager.SaveChanges(Boolean acceptAllChangesOnSuccess)
at Microsoft.Data.Entity.DbContext.SaveChanges(Boolean acceptAllChangesOnSuccess)
at Microsoft.Data.Entity.DbContext.SaveChanges()
at Uniti.Data.Repository`1.Add(T entity) in D:\Alex\Projects\Uniti\src\Uniti.Data\Repository.cs:line 38
InnerException:
Class=16
ErrorCode=-2146232060
HResult=-2146232060
LineNumber=2
Message=Invalid object name 'UnitiPost'.
Number=208
Procedure=""
Server=(localdb)\MSSQLLocalDB
Source=.Net SqlClient Data Provider
State=1
StackTrace:
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
at System.Data.SqlClient.SqlDataReader.TryConsumeMetaData()
at System.Data.SqlClient.SqlDataReader.get_MetaData()
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds, Boolean describeParameterEncryptionRequest)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
at System.Data.Common.DbCommand.ExecuteReader()
at Microsoft.Data.Entity.Relational.Update.ReaderModificationCommandBatch.Execute(RelationalTransaction transaction, IRelationalTypeMapper typeMapper, DbContext context, ILogger logger)
InnerException:
Repository Add method
public bool Add(T entity)
{
_context.Add(entity);
_context.Entry(entity).State = EntityState.Added;
return _context.SaveChanges() > 0;
}
Controller action to add UnitiPost
[HttpPost]
[Route("Add")]
[Authorize("Bearer")]
public async Task<IActionResult> Add([FromBody] UnitiPostAddDto postAddModel)
{
if (ModelState.IsValid)
{
var user = await UserManager.FindByIdAsync(User.GetUserId());
var post = new UnitiPost
{
Creator = user,
CreateDateTime = DateTime.UtcNow,
UpdateDateTime = DateTime.UtcNow,
Content = postAddModel.Content
};
var add = Repository.Add(post);
if (!add)
{
return Json(false);
}
return Json(true);
}
return Json(new FailureResult(null, ModelState));
}
If you need more information to solve the issue, I will be able to give you individual access to my GitHub repo, but it is a private repo, so I cannot open it to everyone.

Unable to assign value by condition using Update

I am trying to write linq expression that updates all my records and sets their Default field based on id match condition:
m_context.Languages.Update(x =>
new Language {Default = x.LanguageId == _languageId ? true : false}
);
But in that case I am getting an error:
System.Data.SqlClient.SqlException: Ambiguous column name 'LanguageId'.
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite)
at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite)
at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
at EntityFramework.Batch.SqlServerBatchRunner.<InternalUpdate>d__15`1.MoveNext()
--- End of inner exception stack trace ---
at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
at EntityFramework.Extensions.BatchExtensions.Update[TEntity](IQueryable`1 source, Expression`1 updateExpression)
What I am going wrong? I tried other conditions and it seems it works fine until another field participates in condition:
context.Languages.Update(x => new Language {Default = !x.Default}); //fine
context.Languages.Update(x => new Language {Default = true == true}); //fine
context.Languages.Update(x => new Language {Version = x.Version + 1}); //fine
context.Languages.Update(x => new Language {Default = x.LanguageId == langId}); //error