小编Pra*_*ees的帖子

我使用下面的代码来生成动态绑定表达式；这里如何将表达式左右部分转换为下？因为我想过滤小写和大写过滤器。

private static Expression GetExpression<T>(ParameterExpression param, Filter filter)
    {
        MemberExpression member = Expression.Property(param, filter.PropertyName);
        ConstantExpression constant = Expression.Constant(filter.Value);

        switch (filter.Operation)
        {
            case Op.Equals:
                return Expression.Equal(member, constant);

            case Op.GreaterThan:
                return Expression.GreaterThan(member, constant);

            case Op.GreaterThanOrEqual:
                return Expression.GreaterThanOrEqual(member, constant);

            case Op.LessThan:
                return Expression.LessThan(member, constant);

            case Op.LessThanOrEqual:
                return Expression.LessThanOrEqual(member, constant);

            case Op.Contains:
                return Expression.Call(member, containsMethod, constant);

            case Op.StartsWith:
                return Expression.Call(member, startsWithMethod, constant);

            case Op.EndsWith:
                return Expression.Call(member, endsWithMethod, constant);
        }

        return null;
    }

我正在从主存储过程执行另一个存储过程。主要存储过程如下

    ALTER Procedure [dbo].[SaveLabTestEntry] 
    (
     @LE_No         nvarchar(100)=null,
     @hcp_id        varchar(25)=null,
     @Pat_prof_Id   nvarchar(100)=null,
     @Usr_Id        nvarchar(100)=null,
     @LE_Date       nvarchar(100)=null,
     @LE_Time       nvarchar(100)=null,
     @HospitalName  nvarchar(100)=null,
     @Mode          nvarchar(10)=null,
     @dt    LabEntryD_TVP   READONLY    
     )
AS
Declare  @ResultMsg as nvarchar(50)
Declare  @MaxID as Int
Declare  @Status as Int
Begin
    BEGIN TRY
        BEGIN TRANSACTION SaveData
        IF @Mode='ADD'
            BEGIN           

                IF @HospitalName IS NOT NULL AND @HospitalName<>''
                    BEGIN
                        EXEC  @hcp_id= InsertPatAddedHosp @HospitalName, @Usr_Id 
                    END             

                SET @MaxID = (SELECT [Vr_No] + 1 FROM [VrLastNo] WHERE [Vr_Code]='LAB-H' AND [Loc_Id]=1 AND [Co_Cd]='HO')
                SET @LE_No = 'P'+CAST(@MaxID …