C# TSQL try catch事务错误处理，事务计数不匹配

我有一个从C#调用的存储过程，通过执行以下操作处理事务：

using (var dbContext = PowerToolsDatabase.GetDataContext())
{
    dbContext.Connection.Open();
    using (dbContext.Transaction = dbContext.Connection.BeginTransaction(System.Data.IsolationLevel.Serializable))
    { 
        foreach (var element in package.AddOrUpdateElements)
        {
            dbContext.usp_Element_Commit( /* args */);
        }

        dbContext.Transaction.Commit();
    }
}

在该存储过程中，有一个try-catch，在特定情况下执行的try部分中有一个RAISERROR

BEGIN TRY
    BEGIN TRANSACTION   
    SET TRANSACTION ISOLATION LEVEL SERIALIZABLE

    -- Perform Name Uniqueness check (for new)
    IF EXISTS ( SELECT PK.identifier --... )
    BEGIN

        RAISERROR(60000, 16, 1, 'dbo.usp_Element_Commit', 'Supplied Element Name (for new Element) already exists')

        RETURN

    END

    -- Do stuff         

    COMMIT TRANSACTION
END TRY
BEGIN CATCH

    IF XACT_STATE() <> 0
    BEGIN
        ROLLBACK TRANSACTION;
    END

    DECLARE @ErrorMessage NVARCHAR(4000);
    DECLARE @ErrorSeverity INT;
    DECLARE @ErrorState INT;

    SELECT
        @ErrorMessage = 'dbo.usp_Element_Commit -- ' + ERROR_MESSAGE(),
        @ErrorSeverity = ERROR_SEVERITY(),
        @ErrorState = ERROR_STATE();

    RAISERROR (@ErrorMessage, @ErrorSeverity, @ErrorState);

END CATCH;

处理错误和跳转到catch块而不破坏外部事务的推荐方法是什么

另外，如果我在存储过程中从catch块中删除回滚，那么我会收到与前一个Count=1、当前Count=2相同的事务计数消息。我将存储过程更改为使用保存点或事务的状态，具体取决于是否已有事务。现在它的工作原理和预期的一样

BEGIN TRY
    declare @trancount int = @@trancount
    if @trancount = 0
        begin transaction
    else
        save transaction usp_element_commit_transaction;

    set transaction isolation level serializable

    -- Perform Name Uniqueness check (for new)
    IF EXISTS ( SELECT PK.identifier --... )
    BEGIN

        RAISERROR(60000, 16, 1, 'dbo.usp_Element_Commit', 'Supplied Element Name (for new Element) already exists')

        RETURN

    END

    -- Do stuff         

    COMMIT TRANSACTION
END TRY
BEGIN CATCH

    declare @xstate int = xact_state()
    if @xstate = -1
        rollback
    else if @xstate = 1 and @trancount = 0
        rollback
    else if @xstate = 1 and @trancount > 0
        rollback transaction usp_element_commit_transaction;

    DECLARE @ErrorMessage NVARCHAR(4000);
    DECLARE @ErrorSeverity INT;
    DECLARE @ErrorState INT;

    SELECT
        @ErrorMessage = 'dbo.usp_Element_Commit -- ' + ERROR_MESSAGE(),
        @ErrorSeverity = ERROR_SEVERITY(),
        @ErrorState = ERROR_STATE();

    RAISERROR (@ErrorMessage, @ErrorSeverity, @ErrorState);

END CATCH;

---

当出现错误时，您的C#如何跳过提交？@KM从dbContext.usp#u元素#COMMIT调用中抛出SqlException，因此它将跳转到封闭using块中的dispose，该块调用C#上的Rollbacktransaction@JNK一次回滚可以回滚所有内容。而XACT_STATE（）0毫无意义。你可以自己试试看。

BEGIN TRY
    declare @trancount int = @@trancount
    if @trancount = 0
        begin transaction
    else
        save transaction usp_element_commit_transaction;

    set transaction isolation level serializable

    -- Perform Name Uniqueness check (for new)
    IF EXISTS ( SELECT PK.identifier --... )
    BEGIN

        RAISERROR(60000, 16, 1, 'dbo.usp_Element_Commit', 'Supplied Element Name (for new Element) already exists')

        RETURN

    END

    -- Do stuff         

    COMMIT TRANSACTION
END TRY
BEGIN CATCH

    declare @xstate int = xact_state()
    if @xstate = -1
        rollback
    else if @xstate = 1 and @trancount = 0
        rollback
    else if @xstate = 1 and @trancount > 0
        rollback transaction usp_element_commit_transaction;

    DECLARE @ErrorMessage NVARCHAR(4000);
    DECLARE @ErrorSeverity INT;
    DECLARE @ErrorState INT;

    SELECT
        @ErrorMessage = 'dbo.usp_Element_Commit -- ' + ERROR_MESSAGE(),
        @ErrorSeverity = ERROR_SEVERITY(),
        @ErrorState = ERROR_STATE();

    RAISERROR (@ErrorMessage, @ErrorSeverity, @ErrorState);

END CATCH;