Question

DBML Designer中的代码


[global::System.Data.Linq.Mapping.FunctionAttribute(Name="dbo.uspCalculateRiskMatrix")]   
      public int uspCalculateRiskMatrix([global::System.Data.Linq.Mapping.ParameterAttribute(Name="CashPrice", DbType="Float")] System.Nullable cashPrice,     [global::System.Data.Linq.Mapping.ParameterAttribute(Name="InputAPH", DbType="Int")] System.Nullable inputAPH,    [global::System.Data.Linq.Mapping.ParameterAttribute(Name="Bushels", DbType="Int")] System.Nullable bushels,     [global::System.Data.Linq.Mapping.ParameterAttribute(Name="PercentageCover", DbType="Float")] System.Nullable percentageCover,    [global::System.Data.Linq.Mapping.ParameterAttribute(Name="BasicEstimate", DbType="Float")] System.Nullable basicEstimate,     [global::System.Data.Linq.Mapping.ParameterAttribute(Name="CallStrike", DbType="Float")] System.Nullable callStrike,     [global::System.Data.Linq.Mapping.ParameterAttribute(Name="CallBu", DbType="Int")] System.Nullable callBu,     [global::System.Data.Linq.Mapping.ParameterAttribute(Name="CallPremium", DbType="Float")] System.Nullable callPremium,     [global::System.Data.Linq.Mapping.ParameterAttribute(Name="PutStrike", DbType="Float")] System.Nullable putStrike,     [global::System.Data.Linq.Mapping.ParameterAttribute(Name="PutBu", DbType="Int")] System.Nullable putBu,    [global::System.Data.Linq.Mapping.ParameterAttribute(Name="PutPremium", DbType="Float")] System.Nullable putPremium,    [global::System.Data.Linq.Mapping.ParameterAttribute(Name="TotalAcres", DbType="Float")] System.Nullable totalAcres,     [global::System.Data.Linq.Mapping.ParameterAttribute(Name="AvgPrice", DbType="Float")] System.Nullable avgPrice,     [global::System.Data.Linq.Mapping.ParameterAttribute(Name="PerAcreProductionCost",     DbType="Float")] System.Nullable perAcreProductionCost,    [global::System.Data.Linq.Mapping.ParameterAttribute(Name="SpringPrice", DbType="Float")] System.Nullable springPrice)   
      {
            IExecuteResult result = this.ExecuteMethodCall(this, ((MethodInfo)(MethodInfo.GetCurrentMethod())), cashPrice, inputAPH, bushels, percentageCover, basicEstimate, callStrike, callBu, callPremium, putStrike, putBu, putPremium, totalAcres, avgPrice, perAcreProductionCost, springPrice);
            return ((int)(result.ReturnValue));
      }

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我的代码将SP绑定到gridview


 var a = from risk in HRM_dc.uspCalculateRiskMatrix(CashPrice, InputAPH, Bushels, PercentageCover, BasicEstimate, CallStrike, CallBu, CallPremium,
                                                                 PutStrike, PutBu, PutPremium, TotalAcres, AvgPrice, PerAcreProductionCost, SpringPrice)
                        select risk;

                GridView gvRisk = new GridView();
                gvRisk.DataSource = a;
                gvRisk.DataBind();

错误：错误2无法找到源类型“int”的查询模式的实现。找不到“选择”。

请快点帮忙 TIA

Answer 1

当您缺少名称空间...或源对象未实现IEnumerable时，通常会发生此类错误（未找到查询模式）。

检查存储过程的返回类型，它是Integer类型，它不实现IEnumerable<T>也不是集合类型。如果使用整数int[] intArray = {10, 20};数组，那么可以使用linq。

你不能像这样实现它。更多关于Gridview的DataSource属性不支持显示此类数据..

价：
Could not find an implementation of the query pattern
Linq Error "Could not find an implementation of the query pattern for source type 'System.Linq.IQueryable' Join Not Found'

编辑：根据评论：检查此Accessing dynamically created stored procedure from LINQ，这可能是您的解决方案..

无法使用Linq将存储过程的输出绑定到gridview

1 个答案: