Webmatrix QueryValue 调用引发 SQLException "Incorrect syntax near '0'."

Question

以下方法查找 IMEI 代码的 ID

public static int GetId(string imei)
{
    int returnVal = 0;
    string sqlGetVehicle = "sp_Scalar_VehicleId_For_IMEI @IMEI = {0}";

    using (var db = Database.Open("ClientApp"))
    {
        returnVal = db.QueryValue(sqlGetVehicle, imei);
    }

    return returnVal;
}

它调用的 sp 设置为 return 单个值。当 SMO 中的运行时，程序运行良好。给它一个 IMEI 字符串，如果它在 table 中，它将 return vehicleId。如果不是，则 return 为 0。

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:      *trim*
-- Create date: 2017-05-12
-- Description: Returns the VehicleId Associated with an IMEI
-- =============================================
ALTER PROCEDURE [dbo].[sp_Scalar_VehicleId_For_IMEI]
    @IMEI varchar(20)
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    DECLARE @VehicleId int

    SELECT @VehicleId = v.VehicleId
    FROM   Vehicles v
    WHERE v.TabletIMEI = @IMEI


    -- ISNULL() in query wasn't working
    IF @VehicleId IS NULL
    BEGIN
        SET @VehicleId = 0
    END

    SELECT @VehicleId

END

当从代码中运行时，过程抛出 System.Data.SqlClient.SqlException: Incorrect syntax near '0'. 它在我删除 ISNULL() 检查之前以及在我用 IF 语句替换它之后抛出这个。此错误的根本原因是什么？

[SqlException (0x80131904): Incorrect syntax near '0'.]
   System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +2442126
   System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +5736904
   System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +628
   System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) +3731
   System.Data.SqlClient.SqlDataReader.TryConsumeMetaData() +58
   System.Data.SqlClient.SqlDataReader.get_MetaData() +89
   System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) +379
   System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds, Boolean describeParameterEncryptionRequest) +2026
   System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite) +375
   System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +53
   System.Data.SqlClient.SqlCommand.ExecuteScalar() +271
   WebMatrix.Data.Database.QueryValue(String commandText, Object[] args) +111
   *trim*.Forms.*trim*.Vehicle.GetId(String imei) in C:\Users\*trim*\Documents\Visual Studio 2017\WebSites\*trim*\App_Code\Vehicle.cs:258
   ASP.Functions.UpdateSessionVehicle() in C:\Users\*trim*\Documents\Visual Studio 2017\WebSites\*trim*\App_Code\Functions.cshtml:148
   ASP._Page_Default_cshtml.Execute() in C:\Users\*trim*\Documents\Visual Studio 2017\WebSites\*trim*\Default.cshtml:8
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +198
   System.Web.WebPages.WebPage.ExecutePageHierarchy(IEnumerable`1 executors) +69
   System.Web.WebPages.WebPage.ExecutePageHierarchy() +131
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +78
   System.Web.WebPages.WebPageHttpHandler.ProcessRequestInternal(HttpContextBase httpContext) +116

Answer 1

Webmatrix 的占位符似乎是 @0 而不是 {0}。此外，要实际执行存储过程，应使用 "Exec" 调用它。

考虑到这一点，命令文本应定义为：

string sqlGetVehicle = "Exec sp_Scalar_VehicleId_For_IMEI @IMEI = @0";

根据 this post 另一种方式可能是：

returnVal = db.Query("Exec sp_Scalar_VehicleId_For_IMEI", imei);

Webmatrix QueryValue 调用引发 SQLException "Incorrect syntax near '0'."

Webmatrix QueryValue call raising SQLException "Incorrect syntax near '0'."

c#

tsql

webmatrix