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我正在尝试执行我的存储过程，它需要 13 个参数，有些可以接受空值，有些总是需要的。我收到 2 个接受 null 的日期参数的错误。

我收到以下错误

System.Data.SqlClient.SqlException
参数化查询“(@recordType nvarchar(12),@lotCreation bit,@licensePlateCreation”需要参数“@lotManufactureDate”，但未提供该参数。

这是当我从 SQL Server 数据库调用存储过程时 edmx 模型创建的存储过程代码，这里licensePlateLookupCode从存储过程命名的参数允许空值，但在 emdx 模型创建的代码中它不显示它可以采用空值- 你知道为什么吗？

它应该像Nullable<string> licensePlateLookupCode而不像现在这样string licensePlateLookupCode。

  public virtual int AddFeedbackRequestsAgentInsert(string recordType, 
     Nullable<bool> lotCreation, Nullable<bool> licensePlateCreation, 
     Nullable<int> finishedGoodLineId, Nullable<int> lotid, string 
     lotLookupCode, Nullable<System.DateTime> lotManufactureDate, 
     Nullable<System.DateTime> lotExpirationDate, Nullable<decimal> 
     packagedAmount, Nullable<int> packagingId, string 
     licensePlateLookupCode, Nullable<int> licensePlateId, Nullable<int> 
     licensePlateLocationId)
    {
        var recordTypeParameter = recordType != null ?
            new ObjectParameter("recordType", recordType) :
            new ObjectParameter("recordType", typeof(string));

        var lotCreationParameter = lotCreation.HasValue ?
            new ObjectParameter("lotCreation", lotCreation) :
            new ObjectParameter("lotCreation", typeof(bool));

        var licensePlateCreationParameter = licensePlateCreation.HasValue ?
            new ObjectParameter("licensePlateCreation", licensePlateCreation) :
            new ObjectParameter("licensePlateCreation", typeof(bool));

        var finishedGoodLineIdParameter = finishedGoodLineId.HasValue ?
            new ObjectParameter("finishedGoodLineId", finishedGoodLineId) :
            new ObjectParameter("finishedGoodLineId", typeof(int));

        var lotidParameter = lotid.HasValue ?
            new ObjectParameter("lotid", lotid) :
            new ObjectParameter("lotid", typeof(int));

        var lotLookupCodeParameter = lotLookupCode != null ?
            new ObjectParameter("lotLookupCode", lotLookupCode) :
            new ObjectParameter("lotLookupCode", typeof(string));

        var lotManufactureDateParameter = lotManufactureDate.HasValue ?
            new ObjectParameter("lotManufactureDate", lotManufactureDate) :
            new ObjectParameter("lotManufactureDate", typeof(System.DateTime));

        var lotExpirationDateParameter = lotExpirationDate.HasValue ?
            new ObjectParameter("lotExpirationDate", lotExpirationDate) :
            new ObjectParameter("lotExpirationDate", typeof(System.DateTime));

        var packagedAmountParameter = packagedAmount.HasValue ?
            new ObjectParameter("packagedAmount", packagedAmount) :
            new ObjectParameter("packagedAmount", typeof(decimal));

        var packagingIdParameter = packagingId.HasValue ?
            new ObjectParameter("packagingId", packagingId) :
            new ObjectParameter("packagingId", typeof(int));

        var licensePlateLookupCodeParameter = licensePlateLookupCode != null ?
            new ObjectParameter("licensePlateLookupCode", licensePlateLookupCode) :
            new ObjectParameter("licensePlateLookupCode", typeof(string));

        var licensePlateIdParameter = licensePlateId.HasValue ?
            new ObjectParameter("licensePlateId", licensePlateId) :
            new ObjectParameter("licensePlateId", typeof(int));

        var licensePlateLocationIdParameter = licensePlateLocationId.HasValue ?
            new ObjectParameter("licensePlateLocationId", licensePlateLocationId) :
            new ObjectParameter("licensePlateLocationId", typeof(int));

        return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("AddFeedbackRequestsAgentInsert", recordTypeParameter, lotCreationParameter, licensePlateCreationParameter, finishedGoodLineIdParameter, lotidParameter, lotLookupCodeParameter, lotManufactureDateParameter, lotExpirationDateParameter, packagedAmountParameter, packagingIdParameter, licensePlateLookupCodeParameter, licensePlateIdParameter, licensePlateLocationIdParameter);
    }

这是我调用该存储过程的地方，然后在用户单击提交按钮后执行它，我收到了 lotmanufacturer 和 lotexpiration 日期参数的错误，因为我认为它们是 NULLS，但在实际的数据库存储过程中它可以取空值或不

    private void Btn_Submit_Click(object sender, EventArgs e)
    {
        // db context variable
        var context = _manufacturingDbContext;

        // ** Variables to insert to FootPrint stored procedure datex_footprint_integration.AddFeedbackRequestsAgentInsert with Record Type (FinishedGood)
        const string recordType = "FinishedGood";
        const bool lotCreation = false;
        const bool licensePlateCreation = true;           
        var finishedGoodLineId = context.FinishedGoodLineIdByOrderAndFinishedGoodAndLot(Cmb_MfgOrder.Text, Cmb_FgLookupCode.Text, Cmb_LotLookupCode.Text).FirstOrDefault();         
        var lotId = context.LotIdByManufacturingOrderAndFinishedGood(Cmb_MfgOrder.Text, Cmb_FgLookupCode.Text,Cmb_LotLookupCode.Text).FirstOrDefault();
        var doNotCreateLot = null;
        DateTime? lotManufactureDate = null;
        DateTime? lotExpirationDate = null;
        var packagedAmount = Convert.ToDecimal(Txt_PackagedAmount.Text);
        const int packagedId = 3;
        var licensePlateLookupCode = Txt_LicensePlateLookupCode.Text;
        int? licensePlateId = null;
        const int licensePlateLocationId = 51372;            

        // Call SQL Server SPROC dbo.AddFeedbackRequestsAgentInsert and enter data to FootPrint Task

        context.Database.ExecuteSqlCommand("EXEC dbo.AddFeedbackRequestsAgentInsert " +
                                           "@recordType, @lotCreation, @licensePlateCreation, @finishedGoodLineId, @lotid, @lotLookupCode, @lotManufactureDate," +
                                           "@lotExpirationDate, @packagedAmount, @packagingId, @licensePlateLookupCode, @licensePlateId, @licensePlateLocationId",
                             new SqlParameter("@recordType", recordType),
                                            new SqlParameter("@lotCreation", lotCreation),
                                            new SqlParameter("@licensePlateCreation", licensePlateCreation),
                                            new SqlParameter("@finishedGoodLineId", finishedGoodLineId),
                                            new SqlParameter("@lotid", lotId),
                                            new SqlParameter("@lotLookupCode", doNotCreateLot),
                                            new SqlParameter("@lotManufactureDate", lotManufactureDate),
                                            new SqlParameter("@lotExpirationDate", lotExpirationDate),
                                            new SqlParameter("@packagedAmount", packagedAmount),
                                            new SqlParameter("@packagingId", packagedId),
                                            new SqlParameter("@licensePlateLookupCode", licensePlateLookupCode),
                                            new SqlParameter("@licensePlateId", licensePlateId),
                                            new SqlParameter("@licensePlateLocationId", licensePlateLocationId)
                                            );

        context.SaveChanges();
}

这是实际的存储过程-您可以看到@lotManufactureDate并且@lotExpirationDate确实允许空值：

CREATE PROCEDURE [dbo].[AddFeedbackRequestsAgentInsert]
         @recordType NVARCHAR(30),
         @lotCreation BIT,
         @licensePlateCreation BIT,
         @finishedGoodLineId INT,
         @lotid INT NULL,
         @lotLookupCode NVARCHAR(256) NULL,
         @lotManufactureDate DATETIME NULL,
         @lotExpirationDate DATETIME NULL,
         @packagedAmount DECIMAL(28,8),
         @packagingId INT,
         @licensePlateLookupCode NVARCHAR(256) NULL,
         @licensePlateId INT NULL,
         @licensePlateLocationId INT NULL

所以，我不明白为什么当我为那些具有空日期的 2 个日期参数传递时，我会收到预期的错误，如果我传递 null 时，如果 lotlookupcode 参数会发生同样的事情，我会得到与期待 lotlookupcode 相同的错误。你能看出这里可能是什么问题吗？

我对我的代码进行了新的更改，现在我没有像以前的请求描述那样得到错误，但是现在当我调用存储过程来执行时，我在数据库上看不到任何内容，可以根据参数在下面查看我提供的基于 emdx 模型是否正确？

我从模型浏览器导入函数存储过程中调用此函数，当我按下提交按钮时，我没有在数据库上收到任何内容，基于上面的 emdx 模型和存储过程，参数看起来是否正确？

    var context = _manufacturingDbContext;


    const string recordType = "FinishedGood";
    const bool lotCreation = false;
    const bool licensePlateCreation = true;           
    var finishedGoodLineId = context.FinishedGoodLineIdByOrderAndFinishedGoodAndLot(Cmb_MfgOrder.Text, Cmb_FgLookupCode.Text, Cmb_LotLookupCode.Text).FirstOrDefault();         
    var lotId = context.LotIdByManufacturingOrderAndFinishedGood(Cmb_MfgOrder.Text, Cmb_FgLookupCode.Text,Cmb_LotLookupCode.Text).FirstOrDefault();
    var doNotCreateLot = null;
    DateTime? lotManufactureDate = null;
    DateTime? lotExpirationDate = null;
    var packagedAmount = Convert.ToDecimal(Txt_PackagedAmount.Text);
    const int packagedId = 3;
    var licensePlateLookupCode = Txt_LicensePlateLookupCode.Text;
    int? licensePlateId = null;
    const int licensePlateLocationId = 51372;    


        //calling stored procedure and send data to sproc based on the variables above
        context.AddFeedbackRequestsAgentInsert(recordType, lotCreation, licensePlateCreation, finishedGoodLineId,
            lotId, lot, lotManufactureDate, lotExpirationDate, packagedAmount, packagedId, licensePlateLookupCode,
            licensePlateId, licensePlateLocationId);

}

4

3 回答 3

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这是我的答案，我所要做的就是修复我的 sql 存储过程的某些部分，最重要的是，我只需要调用从 emdx 模型创建的导入函数并向其添加正确的参数，然后检查我的数据库数据是否正确插入基于代码解决方案，如果您看到更好的方法有任何问题，请告诉我。

    public void ExecuteStoredProcedure()
    {
        try
        {
            // db context variable
            var context = _manufacturingDbContext;

            const string recordType = "FinishedGood";
            const bool lotCreation = false;
            const bool licensePlateCreation = true;
            var finishedGoodLineId = context.FinishedGoodLineIdByOrderAndFinishedGoodAndLot(Cmb_MfgOrder.Text, Cmb_FgLookupCode.Text, Cmb_LotLookupCode.Text).FirstOrDefault();
            var lotId = context.LotIdByManufacturingOrderAndFinishedGood(Cmb_MfgOrder.Text, Cmb_FgLookupCode.Text, Cmb_LotLookupCode.Text).FirstOrDefault();
            string lot = null;
            DateTime? lotManufactureDate = null;
            DateTime? lotExpirationDate = null;
            var packagedAmount = Convert.ToDecimal(Txt_PackagedAmount.Text);
            const int packagedId = 3;
            var licensePlateLookupCode = Txt_LicensePlateLookupCode.Text;
            int? licensePlateId = null;
            const int licensePlateLocationId = 51372;


            // Call SQL Server SPROC datex_footprint_integration.AddFeedbackRequestsAgentInsert and enter data to FootPrint Task
            var run = context.AddFeedbackRequestsAgentInsert(recordType, lotCreation, licensePlateCreation, finishedGoodLineId,
                lotId, "", lotManufactureDate, lotExpirationDate, packagedAmount, packagedId, licensePlateLookupCode,
                licensePlateId, licensePlateLocationId);
            context.SaveChanges();
        }
        catch (Exception e)
        {
            MessageBox.Show(e.Message);
            throw;
        }       
    }
于 2019-11-07T17:19:30.450 回答
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因此，您更新了数据库中的存储过程，但您的数据模型不知道这些更改..您需要做的是更新您的 .net 应用程序中的实体固件.. 1-刷新（更新）来自数据库的 EDMX..

在此处输入图像描述

2- 右键单击​​概念模型 (mode.context.tt) 和 (model.tt)，然后单击 (运行自定义工具).. 这将更新您的 C# 映射数据模型以查看这些添加的新参数。

在此处输入图像描述

于 2019-11-06T23:38:33.030 回答
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您可以AddFeedbackRequestsAgentInsert直接调用EF生成的方法并将参数传递给它。您可能不需要调用ontext.Database.ExecuteSqlCommand

仍然，如果你想使用ontext.Database.ExecuteSqlCommand，你可以使用下面的代码在可为空的日期参数上传递 null

        new SqlParameter("@lotManufactureDate", lotManufactureDate.HasValue ? lotManufactureDate : DBNull.Value),
        new SqlParameter("@lotManufactureDate", lotExpirationDate.HasValue ? lotExpirationDate : DBNull.Value),

或者

        new SqlParameter("@lotManufactureDate", lotManufactureDate.HasValue ? lotManufactureDate : default(DateTime)),
        new SqlParameter("@lotManufactureDate", lotExpirationDate.HasValue ? lotExpirationDate : default(DateTime)),
于 2019-11-06T23:46:37.733 回答