基本上我有一個C#應用程序,它將創建一個數據表並將數據表作爲存儲過程傳遞。然而,這一切都有效。我想要做的是將邏輯添加到傳入的數據表中。如何在存儲過程的WHERE子句中使用類型數據表
例如在下面的測試中,您將看到一個名爲RealInsertNewRecords
的過程;這一次嘗試,以確保重複的主鍵衝突沒有發生,但我得到的錯誤
必須聲明標量變量「@dataTable」
下面是一個完整的測試,任何幫助讚賞。謝謝!
的澄清存儲過程RealInsertNewRecords
是什麼行不通
C#
using System;
using System.Data;
using System.Data.SqlClient;
namespace testApp
{
class Program
{
static void Main(string[] args)
{
string SQLServer = @"";
SqlConnection sqlCon = new SqlConnection("Data Source=" + SQLServer + ";Initial Catalog=myTestDB;Integrated Security=SSPI;");
sqlCon.Open();
InsertNewRecords(sqlCon, testTable1());
InsertNewRecords(sqlCon, testTable2());
sqlCon.Dispose();
}
public static DataTable testTable1()
{
DataTable dt = new DataTable();
dt.Columns.Add("myTestPK");
string[] items = new string[] { "apples", "pears" };
for (int i = 0; i < items.Length; i++)
{
DataRow dr = dt.NewRow();
dr[0] = items[i];
dt.Rows.Add(dr);
}
return dt;
}
public static DataTable testTable2()
{
DataTable dt = new DataTable();
dt.Columns.Add("myTestPK");
string[] items = new string[] { "apples", "pears", "grapes" };
for (int i = 0; i < items.Length; i++)
{
DataRow dr = dt.NewRow();
dr[0] = items[i];
dt.Rows.Add(dr);
}
return dt;
}
public static void InsertNewRecords(SqlConnection sqlCon, DataTable parameterTable)
{
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "InsertNewRecords";
cmd.Parameters.AddWithValue("dataTable", parameterTable);
cmd.Connection = sqlCon;
cmd.CommandType = CommandType.StoredProcedure;
cmd.ExecuteNonQuery();
}
}
}
SQL
if exists (select 'x' from sys.databases where [name] = 'myTestDB')
begin
drop database myTestDB;
end
Create database myTestDB;
GO
USE [myTestDB]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[myTable]
(
[myTestPK] [nvarchar](50) NOT NULL,
CONSTRAINT [PK_myTable]
PRIMARY KEY CLUSTERED ([myTestPK] ASC)
WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF,
IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON,
ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
create Type [dbo].myTableParameters as table
(
myTestPK nvarchar(10)
)
go
create procedure InsertNewRecords(@dataTable [dbo].myTableParameters readonly)
as
begin
insert into myTable
select * from @dataTable;
end
go
--This is what i really want to do!
create procedure RealInsertNewRecords(@dataTable [dbo].myTableParameters readonly)
as
begin
insert into myTable
select *
from @dataTable
where not exists (select 'x'
from myTable m
where m.myTestPK = @dataTable.myTestPK)
end
有人想解釋downvote? – JL1