使用Entity Framework 4.1将位字段参数传递给存储过程

如何解决使用Entity Framework 4.1将位字段参数传递给存储过程

| 所有， 我整天忙于解决以下问题。我正在尝试进行包含三个位字段参数的参数化存储过程调用。我一直遇到的异常是“将数据类型nvarchar转换为bit时出错。” 这是我的源代码： 存储过程

ALTER PROCEDURE usp_TestParamProc
    @price_segment_set_id VARCHAR(8) = NULL,@segment_group_id VARCHAR(8) = NULL,@segment_price_band_id VARCHAR(8) = NULL,@segment_id VARCHAR(8) = NULL,@include_source_price_bands BIT = 0,@apply_segmentation BIT = 0,@print_sql BIT = 0
AS
BEGIN
    SET NOCOUNT ON;
    SELECT *
    FROM MarketingSegmentDetails
    WHERE SegmentID = @segment_id

END
GO

C＃代码：

        var segment_id = \"1\";
        string segment_group_id = \"1\";
        string segment_price_band_id = \"1\";
        string price_segment_set_id = \"1\";
        var include_source_price_bands = false;
        var apply_segmentation = false;
        var print_sql = false;

        using (var context = new PricingContext())
        {
            var list = new List<object>();
            list.Add(price_segment_set_id == null
                         ? new sqlParameter(\"price_segment_set_id\",dbnull.Value)
                         : new sqlParameter(\"price_segment_set_id\",price_segment_set_id));
            list.Add(segment_group_id == null
                        ? new sqlParameter(\"segment_group_id\",dbnull.Value)
                        : new sqlParameter(\"segment_group_id\",segment_group_id));
            list.Add(segment_price_band_id == null
                        ? new sqlParameter(\"segment_price_band_id\",dbnull.Value)
                        : new sqlParameter(\"segment_price_band_id\",segment_price_band_id));
            list.Add(segment_id == null
                        ? new sqlParameter(\"segment_id\",dbnull.Value)
                        : new sqlParameter(\"segment_Id\",segment_id));
            list.Add(include_source_price_bands == null 
                        ? new sqlParameter(\"include_source_price_bands\",dbnull.Value)
                        : new sqlParameter(\"include_source_price_bands\",Convert.ToBoolean(include_source_price_bands)));
            list.Add(apply_segmentation == null
                        ? new sqlParameter(\"apply_segmentation\",dbnull.Value)
                        : new sqlParameter(\"apply_segmentation\",Convert.ToBoolean(apply_segmentation)));
            list.Add(print_sql == null
                         ? new sqlParameter(\"print_sql\",dbnull.Value)
                         : new sqlParameter(\"print_sql\",Convert.ToBoolean(print_sql)));

            var segments = context.Database.sqlQuery<usp_SegmentProcessing>(\"usp_TestParamProc price_segment_set_id,segment_group_id,segment_price_band_id,segment_id,include_source_price_bands,apply_segmentation,print_sql\",list.ToArray()).ToList();

任何帮助将不胜感激。我在项目工作上落后。 谢谢， 德里克     

解决方法

        也许尝试做类似的事情

list.Add(
   new SqlParameter(\"print_sql\",System.Data.SqlDbType.Bit) { Value = (print_sql != null ? print_sql : DBNull.Value) }
);

http://msdn.microsoft.com/en-us/library/h8f14f0z.aspx