调用存储过程

　　呵呵，测试了一下C#调用存储过程：　　

CREATE PROCEDURE sp_AccountRole_Create
    @CategoryID int,
    @RoleName nvarchar(10),
    @Description nvarchar(50),

    @RoleID int output
    AS
    DECLARE @Count int

    -- 查找是否有相同名称的记录

    SELECT @Count = Count(RoleID) FROM Account_Role WHERE

        RoleName = @RoleName

    IF @Count = 0
        INSERT INTO Account_Role 

        (CategoryID, RoleName, Description) valueS

        (@CategoryID, @RoleName, @Description)

        SET @RoleID = @@IDENTITY
        RETURN 1

GO

　　
执行存储过程的C#过程：

　　

SqlConnection DbConnection = new SqlConnection(mConnectionString);

//用SqlCommand的构造函数，指定SQL存储过程名和连接字;
SqlCommand command = new SqlCommand( "sp_AccountRole_Create", DbConnection );


DbConnection.Open(connectString);




// 下面的语句设置SqlCommand的属性为存储过程
command.CommandType = CommandType.StoredProcedure;
command.Parameters.Add("@CategoryID", SqlDbType.Int, 4);

command.Parameters.Add("@RoleName", SqlDbType.NVarChar, 10);

command.Parameters.Add("@Description", SqlDbType.NVarChar, 50);

command.Parameters.Add("@RoleID", SqlDbType.Int, 4);


// 返回值

command.Parameters.Add("Returnvalue",

            SqlDbType.Int,

            4,        // Size

            ParameterDirection.Returnvalue,

            false,        // is nullable 

            0,        // byte precision

            0,        // byte scale

            string.Empty,

            DataRowVersion.Default,

            null );

command.parameters["@CategoryID"].value = permission.CategoryID;

command.parameters["@RoleName"].value = permission.PermissionName;

command.parameters["@Description"].value = permission.Description;


// 可以返回新的ID值

command.parameters["@RoleID"].Direction = ParameterDirection.Output;

//下面的语句开始执行存储过程的查询操作;
int rowsAffected = command.ExecuteNonQuery();

int result = command.parameters["Returnvalue"].value;

int newID = command.parameters["@RoleID"].value;


得到三个值，分别是行影响值，存储过程返回值，新的ID值