Question

我想从我的数据库调用存储过程，但它还需要一个属性列表作为类型，我将光标放在该类型上。但每次执行命令时，我都会收到异常，表示光标未打开。

我现在已经拥有

        using (Connection = new SqlConnection(ConnectionString))
        {
            Connection.Open();

            using (Command = new SqlCommand())
            {
                Command.Connection = Connection;
                Command.CommandText = "CreateCharacter";
                Command.CommandType = CommandType.StoredProcedure;
                Command.Parameters.AddWithValue("@Skills", skills);
                Command.Parameters.AddWithValue("@AccountId", accountId);
                Command.Parameters.AddWithValue("@ClassId", masteryId);
                Command.Parameters.AddWithValue("@RaceId", raceId);
                Command.Parameters.AddWithValue("@Name", name);

                try
                {
                    return character = LoadCharacter(Convert.ToInt32(Command.ExecuteScalar()));
                }

                catch (Exception)
                {
                    return null;
                }
            }
        }

类型

CREATE TYPE dbo.AttributeList AS TABLE
(
    AttributeId integer,
    [Level] integer
);
GO

存储过程

CREATE PROCEDURE dbo.CreateCharacter (@Attributes AS dbo.AttributeList 
READONLY, @AccountId integer, @ClassId integer, @RaceId integer, @Name 
varchar(12))
AS
BEGIN
DECLARE AttributeCursor CURSOR FOR
SELECT
    AttributeId,
    [Level]
FROM @Attributes

INSERT INTO Character
    VALUES (@ClassId, @RaceId, NULL, @Name, 1, 0, 0)
DECLARE @Id integer
DECLARE @AttributeId integer
DECLARE @AttributeLevel integer
SET @Id = IDENT_CURRENT('Character');

UPDATE Account
SET CharacterId = @Id
WHERE Id = @AccountId

WHILE (@@FETCH_STATUS = 0)
BEGIN
    INSERT INTO Attribute_Character
        VALUES (@AttributeId, @Id, @AttributeLevel)
    FETCH NEXT FROM AttributeCursor INTO @AttributeId, @AttributeLevel
END
RETURN @Id;
END

Answer 1

要发送Table参数，您只需在C＃端构建一个DataTable：

var table = new DataTable();
table.Columns.Add("AttributeID", typeof(int));
table.Columns.Add("Level", typeof(int));

//Add data
table.Rows.Add(new []{1, 2});

//More code
Command.Parameters.AddWithValue("@Attributes", table);

我认为你在程序中不需要游标。只需插入数据：

INSERT INTO Attribute_Character(AttributeId, AttributeLevel)
SELECT AttributeId, AttributeLevel
FROM @Attributes

C＃ - 使用类型调用存储过程

1 个答案: