我个人认为你想太多或试图减少不需要减少的东西。您最好不要单独保留存储过程参数，或者尝试创建一些可以将参数集附加到命令对象的基类和辅助函数。
但是，话虽如此，我会在那里为您的问题提供一个解决方案，看看它是否符合您的需求：
我建议使用 TSQL 用户定义类型。创建一种或多种类型。也许一个用于日期范围，一个用于分页和排序。我使用类似的过程将多行数据传递给存储过程。（其中一些代码可能需要稍微调整一下，因为我只是在修改我已经编写的一些代码，而且我已经有一段时间没有使用 DataTable 字段了。）
最终，这一切只是缩短了应用程序方法和匹配存储过程中的参数列表。存储过程将负责提取或连接表变量中的信息。下面列出的类确实提供了在 .NET 应用程序端保持这些参数强类型的能力。
if not exists (select * from INFORMATION_SCHEMA.DOMAINS where DOMAIN_SCHEMA = 'dbo' and DOMAIN_NAME = 'DateRange' and DATA_TYPE = 'table type')
begin
create type dbo.DateRange as table
(
StartDate datetime2 null
,EndDate datetime2 null
)
end
go
if not exists (select * from INFORMATION_SCHEMA.DOMAINS where DOMAIN_SCHEMA = 'dbo' and DOMAIN_NAME = 'Paging' and DATA_TYPE = 'table type')
begin
create type dbo.Paging as table
(
PageNumber int null
,PageSize int null
,SortField sysname null
,SortDirection varchar(4) null
)
end
go
SQL 用户定义类型可以表示为 .NET 应用程序中的强类型对象。从基类开始：
Imports System
Imports System.Data
Imports System.Data.SqlClient
Imports System.Runtime.Serialization
Namespace SqlTypes
<Serializable()> _
<System.ComponentModel.DesignerCategory("Code")> _
Public MustInherit Class SqlTableTypeBase
Inherits DataTable
Public Sub New()
MyBase.New()
Initialize()
End Sub
Public Sub New(ByVal tableName As String)
MyBase.New(tableName)
Initialize()
End Sub
Public Sub New(ByVal tableName As String, ByVal tableNamespace As String)
MyBase.New(tableName, tableNamespace)
Initialize()
End Sub
Protected Sub New(ByVal info As SerializationInfo, ByVal context As StreamingContext)
MyBase.New(info, context)
End Sub
''' <summary>
''' Implement this method to create the columns in the data table to match the SQL server user defined table type
''' </summary>
''' <remarks></remarks>
Protected MustOverride Sub Initialize()
Public Function CreateParameter(parameterName As String) As SqlParameter
Dim p As New SqlParameter(parameterName, SqlDbType.Structured)
p.Value = Me
Return p
End Function
End Class
End Namespace
为 SQL 类型创建一个实现：
Imports System
Imports System.Data
Imports System.Runtime.Serialization
Namespace SqlTypes
<Serializable()> _
<System.ComponentModel.DesignerCategory("Code")> _
Public Class DateRange
Inherits SqlTableTypeBase
Public Sub New()
MyBase.New()
End Sub
Public Sub New(ByVal tableName As String)
MyBase.New(tableName)
End Sub
Public Sub New(ByVal tableName As String, ByVal tableNamespace As String)
MyBase.New(tableName, tableNamespace)
End Sub
Protected Sub New(ByVal info As SerializationInfo, ByVal context As StreamingContext)
MyBase.New(info, context)
End Sub
'TODO: throw some more overloaded constructors in here...
Public Sub New(startDate As DateTime?, endDate As DateTime?)
MyBase.New()
Me.StartDate = startDate
Me.EndDate = endDate
End Sub
Public Property StartDate As DateTime?
Get
Return CType(Me.Rows(0)(0), DateTime?)
End Get
Set(value As DateTime?)
Me.Rows(0)(0) = value
End Set
End Property
Public Property EndDate As DateTime?
Get
Return CType(Me.Rows(0)(1), DateTime?)
End Get
Set(value As DateTime?)
Me.Rows(0)(1) = value
End Set
End Property
Protected Overrides Sub Initialize()
Me.Columns.Add(New DataColumn("StartDate", GetType(DateTime?)))
Me.Columns.Add(New DataColumn("EndDate", GetType(DateTime?)))
Me.Rows.Add({Nothing, Nothing})
End Sub
End Class
End Namespace
和：
Imports System
Imports System.Data
Imports System.Runtime.Serialization
Namespace SqlTypes
<Serializable()> _
<System.ComponentModel.DesignerCategory("Code")> _
Public Class Paging
Inherits SqlTableTypeBase
Public Sub New()
MyBase.New()
End Sub
Public Sub New(ByVal tableName As String)
MyBase.New(tableName)
End Sub
Public Sub New(ByVal tableName As String, ByVal tableNamespace As String)
MyBase.New(tableName, tableNamespace)
End Sub
Protected Sub New(ByVal info As SerializationInfo, ByVal context As StreamingContext)
MyBase.New(info, context)
End Sub
'TODO: throw some more overloaded constructors in here...
Public Sub New(pageNumber As Integer?, pageSize As Integer?)
MyBase.New()
Me.PageNumber = pageNumber
Me.PageSize = pageSize
End Sub
Public Sub New(sortField As String, sortDirection As String)
MyBase.New()
Me.SortField = sortField
Me.SortDirection = sortDirection
End Sub
Public Sub New(pageNumber As Integer?, pageSize As Integer?, sortField As String, sortDirection As String)
Me.New(pageNumber, pageSize)
Me.SortField = sortField
Me.SortDirection = sortDirection
End Sub
Public Property PageNumber As Integer?
Get
Return CType(Me.Rows(0)(0), Integer?)
End Get
Set(value As Integer?)
Me.Rows(0)(0) = value
End Set
End Property
Public Property PageSize As Integer?
Get
Return CType(Me.Rows(0)(1), Integer?)
End Get
Set(value As Integer?)
Me.Rows(0)(1) = value
End Set
End Property
Public Property SortField As String
Get
Return CType(Me.Rows(0)(2), String)
End Get
Set(value As String)
Me.Rows(0)(2) = value
End Set
End Property
Public Property SortDirection As String
Get
Return CType(Me.Rows(0)(3), String)
End Get
Set(value As String)
Me.Rows(0)(3) = value
End Set
End Property
Protected Overrides Sub Initialize()
Me.Columns.Add(New DataColumn("PageNumber", GetType(Integer?)))
Me.Columns.Add(New DataColumn("PageSize", GetType(Integer?)))
Me.Columns.Add(New DataColumn("SortField", GetType(String)))
Me.Columns.Add(New DataColumn("SortDirection", GetType(String)))
Me.Rows.Add({Nothing, Nothing, Nothing, Nothing})
End Sub
End Class
End Namespace
实例化对象并在构造函数中设置值，然后简单地从对象中获取参数，并将其附加到存储过程命令对象的参数集合中。
cmd.Parameters.Add(New DateRange(startDate, endDate).CreateParameter("DateRangeParams"))
cmd.Parameters.Add(New Paging(pageNumber, pageSize).CreateParameter("PagingParams"))
编辑
由于这个答案围绕着强类型，我想我应该在方法签名中添加一个强类型的例子：
'method signature with UDTs
Public Function GetMyReport(customParam1 as Integer, timeFrame as DateRange, pages as Paging) as IDataReader
'method signature without UDTs
Public Function GetMyReport(customParam1 as Integer, startDate as DateTime, endDate as DateTime, pageNumber as Integer, pageSize as Integer)