Question

我正在尝试从C＃发送一个字符串到SQL服务器，但我不知道如何使用存储过程将该字符串插入另一个表。

我想要插入数据的表只有2列，@ IDUser（我也是从C＃传递的参数，对于所有idproduct都是相同的）和@IDProduct字符串，它将类似于＆＃34; 1,2,3,4＆＃34;

所以我想要的是一个存储过程来单独插入@idUser和数组值，如

SELECT t.grp_id,
       t.min_value,
       t.max_value,
       price_min.value first_value,
       price_max.value last_value
FROM (
  SELECT   FROM_UNIXTIME(28*60 * (UNIX_TIMESTAMP(created) DIV (28*60))) grp_id
           MIN(value)    min_value,
           MAX(value)    max_value,
           MIN(created)  min_created,
           MAX(created)  max_created
  FROM     price
  GROUP BY grp_id
) t JOIN price price_min ON price_min.created = t.min_created
    JOIN price price_max ON price_max.created = t.max_created

我正在使用sql server 2016。

我找到了这个问题的可能答案，但与我的SQL Server知识水平相比，它们看起来非常复杂。

感谢

Answer 1

我认为你可以试试这两种方式：

没有存储过程：您可以尝试使用SqlBulkCopy类。

C＃代码：

static void Main(string[] args)
    {
        Console.WriteLine("Inserting ...");

        var userId = 777;
        var productIds = new List<int> { 1, 2, 3, 4 };
        var dto = new Dictionary<int, List<int>>
        {
            { userId, productIds }
        };

        ExecuteBulkInsert(dto);
        // ExecuteProcedure(dto);

        Console.WriteLine("Done! ...");
        Console.ReadLine();
    }

    public static void ExecuteBulkInsert( Dictionary<int, List<int>> dto)
    {
        string connectionString = GetConnectionString();

        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            connection.Open();
            DataTable newProducts = CreateDataTable(dto);

            using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connection))
            {
                bulkCopy.DestinationTableName = "dbo.UserProducts";
                bulkCopy.WriteToServer(newProducts);
            }
        }
    }

    private static DataTable CreateDataTable(Dictionary<int, List<int>> dto)
    {
        const string IdUserColumnName = "IdUser";
        const string IdProductColumnName = "IdProduct";

        DataTable table = new DataTable();
        table.Columns.Add(new DataColumn(IdUserColumnName, typeof(int)));
        table.Columns.Add(new DataColumn(IdProductColumnName, typeof(int)));

        foreach (var product in dto)
        {
            foreach (var productId in product.Value)
                table.Rows.Add(product.Key, productId);
        }

        return table;
    }

使用存储过程：尝试使用table-valued parameter

SQL代码：

CREATE TABLE dbo.UserProducts
(
    IdUser INT NOT NULL,
    IdProduct INT NOT NULL
);
GO

CREATE TYPE dbo.UserProductsType AS TABLE
(
    IdUser INT NOT NULL,
    IdUser INT NOT NULL
);
GO

CREATE PROCEDURE dbo.UserProductsInsert
    @userProductsType dbo.UserProductsType READONLY
AS
BEGIN

    INSERT INTO UserProducts
    SELECT * FROM @userProductsType 
END

C＃代码：

    private static void ExecuteProcedure( Dictionary<int, List<int>> dto)
    {
        string connectionString = GetConnectionString();

        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            connection.Open();
            using (SqlCommand command = connection.CreateCommand())
            {
                command.CommandText = "dbo.UserProductsInsert";
                command.CommandType = CommandType.StoredProcedure;

                SqlParameter parameter = command.Parameters.AddWithValue("@userProductsType", CreateDataTable(dto));
                parameter.SqlDbType = SqlDbType.Structured;
                parameter.TypeName = "dbo.UserProductsType";

                command.ExecuteNonQuery();
            }
        }
    }

如何将数组作为参数传递给存储过程？

1 个答案: