Webmatrix QueryValue调用引发SQLException“0附近的语法错误”。“

下列方法查找一个ID为一个IMEI码 Webmatrix QueryValue调用引发SQLException“0附近的语法错误”。“

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; 
}

它调用设置为返回一个值的SP。在SMO中运行时，该过程正常工作。给它一个IMEI字符串，如果它在表中，它将返回vehicleId。如果不是，则返回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，程序抛出System.Data.SqlClient.SqlException: Incorrect syntax near '0'.它被扔在这之前我删除了ISNULL（）检查，经过我与IF语句代替它。这个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

来源

2017-07-27 Hecatonchires

你确定这是'sqlGetVehicle'正确的语法？我认为它应该看起来更像'“sp_Scalar_VehicleId_For_IMEI @IMEI = @ 0” - 如果这甚至是可能的话......从未使用过Webmatrix和存储过程。 – Corak

或[甚至]（https://forums.asp.net/t/1649174.aspx）甚至只是：'returnVal = db.Query（“Exec sp_Scalar_VehicleId_For_IMEI”，imei）;' – Corak

你是对的，它是我的令牌格式。我发誓我会失明。让它成为一个答案，我会选择它 – Hecatonchires

为WebMatrix的占位符似乎@0而不是{0}。另外，要实际执行存储过程，应该使用"Exec"来调用它。

考虑到这一点，命令文本应该被定义为：

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

根据this post另一种方式可以是：

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

来源

2017-07-27 07:15:22 Corak

Webmatrix QueryValue调用引发SQLException“0附近的语法错误”。“

回答

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