• 将实体类、匿名对象转换为SqlParameter列表


    /// <summary>
    /// <remarks>
    /// <para>将实体类/匿名对象转换为SqlParameter列表</para>
    /// <para>示例1: 实体类</para>
    /// <para>EntityClass entityClass = new EntityClass(){ Id = 1 , Name="名称"}; SqlParameter[] parms = entityClass.ToSqlParameterArray()</para>
    /// <para>示例2: 匿名对象</para>
    /// <para>var anonymousObject  = new { Id = 1 , Name="名称"}; SqlParameter[] parms = anonymousObject.ToSqlParameterArray()</para>
    /// <para>注意:SqlParameter(string parameterName, object value)的参数parameterName均为实体类/匿名对象属性的小写形式的副本。</para>
    /// <para>因此,对应sql参数应为小写形式,例如:insert into tbname(name) values(@name)</para>
    /// </remarks>
    /// </summary>
    /// <param name="obj">实体类/匿名对象</param>
    /// <returns>SqlParameter参数数组</returns>
    public static SqlParameter[] ToSqlParameterArray<T>(this T entityClass) where T : class
    {
        List<SqlParameter> parms = new List<SqlParameter>();
        PropertyInfo[] propertys = entityClass.GetType().GetProperties();
        foreach (PropertyInfo pi in propertys)
        {
            // 判断此属性是否有Getter
            if (!pi.CanRead)
            {
                continue;
            }
            object value = pi.GetValue(entityClass);
            parms.Add(new SqlParameter("@" + pi.Name.ToLower(), value));
        }
        return parms.ToArray();
    }
    
    /*>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>*/
    public class EntityClass
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public int Age { get; set; }
    }
    
    //使用示例:
    //1.实体类
    EntityClass ec = new EntityClass()
    {
        Name= "长毛象",
        Age = 2
    };
    //SqlParameter[] parms = ec.ToSqlParameterArray();
    var parms = ec.ToSqlParameterArray();
    
    //2.匿名类
    var ec = new
    {
        Name = "长毛象",
        Age = "2"
    };
    //SqlParameter[] parms = ec.ToSqlParameterArray();
    var parms = ec.ToSqlParameterArray();
    

      

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  • 原文地址:https://www.cnblogs.com/XuPengLB/p/8021695.html
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