当通过C#代码传递到存储过程时，TableTypeParameter始终为null

我编写了一个WebAPI方法，使用存储过程从数据库中获取事务历史记录。输入包括一个表类型参数，该参数从

IEnumerable transactionCategories

获取输入

public IEnumerable<ITransactionItem> Get(long loanId, DateTime? fromDate, DateTime? toDate, IEnumerable<string> transactionCategories)
{
    IList<ITransactionItem> items;

    try
    {
        var transCategories = transactionCategories.Select(t => new TransCategoryTableType(t));

        using (var connector = GetConnector(ConnectionNames.UDSConnection))
        {
            items = (IList<ITransactionItem>)connector.StoredProcedure("spname")
                    .Parameter("@LoanId", loanId)
                    .Parameter("@FromDate", fromDate)
                    .Parameter("@ToDate", toDate)
                    .TableValuedParameter("@TransactionCategories", transCategories)
                    .As<ILedgerTransactionItem>()
                    .WithMapper(_mappingStrategy)
                    .GetRows();
        }
    }
    catch (Exception e)
    {
        throw;
    }

    return items;
}

我需要帮助来解决这个问题。 存储的proc初始部分如下所示：

ALTER PROCEDURE [Core].[uspLedgerTransactionHistory]
(
     @LoanId   BIGINT,
     @FromDate DATETIME = NULL,
     @ToDate   DATETIME = NULL,
     @TransactionCategories [Reference].[TransCategories] READONLY
)
AS
BEGIN
    SET NOCOUNT ON;

    BEGIN TRY
        CREATE TABLE #Temp(TransCodeId INT)
        INSERT INTO #Temp
        Select tc.transactioncodeid FROM Reference.tTransactionCodes tc
        JOIN Reference.tTransCodeCategories tcc
        ON tc.TransactionCodeCategoryId=tcc.TransCodeCategoryId
        WHERE tcc.Description IN (SELECT t.Description FROM     @TransactionCategories t)

---

您的存储过程（至少是带有参数定义的头）是什么样子的？？请看这里：。可能您的问题是不应该使用IEnumerable。您需要传入

IEnumerable

。谢谢您的回复。实际的问题是，我在表类型中传递的数据值来自swagger，如下所示：['Tax'，'Interest']。但我应该这样传递数据：税收利息。上面的代码运行良好。

ALTER PROCEDURE [Core].[uspLedgerTransactionHistory]
(
     @LoanId   BIGINT,
     @FromDate DATETIME = NULL,
     @ToDate   DATETIME = NULL,
     @TransactionCategories [Reference].[TransCategories] READONLY
)
AS
BEGIN
    SET NOCOUNT ON;

    BEGIN TRY
        CREATE TABLE #Temp(TransCodeId INT)
        INSERT INTO #Temp
        Select tc.transactioncodeid FROM Reference.tTransactionCodes tc
        JOIN Reference.tTransCodeCategories tcc
        ON tc.TransactionCodeCategoryId=tcc.TransCodeCategoryId
        WHERE tcc.Description IN (SELECT t.Description FROM     @TransactionCategories t)