C# 将object对象转换为实体对象

C# 将object对象转换为实体对象.一共两种方法.

第一种方法,通过反射遍历的方式转换。代码如下:

/// <summary>
/// 将object对象转换为实体对象
/// </summary>
/// <typeparam name="T">实体对象类名</typeparam>
/// <param name="asObject">object对象</param>
/// <returns></returns>
private T ConvertObject<T>(object asObject) where T : new()
{
    //创建实体对象实例
    var t = Activator.CreateInstance<T>();
    if (asObject != null)
    {
        Type type = asObject.GetType();
        //遍历实体对象属性
        foreach (var info in typeof(T).GetProperties())
        {
            object obj = null;
            //取得object对象中此属性的值
            var val = type.GetProperty(info.Name)?.GetValue(asObject);
            if (val != null)
            {
                //非泛型
                if (!info.PropertyType.IsGenericType)
                    obj = Convert.ChangeType(val, info.PropertyType);
                else//泛型Nullable<>
                {
                    Type genericTypeDefinition = info.PropertyType.GetGenericTypeDefinition();
                    if (genericTypeDefinition == typeof(Nullable<>))
                    {
                        obj = Convert.ChangeType(val, Nullable.GetUnderlyingType(info.PropertyType));
                    }
                    else
                    {
                        obj = Convert.ChangeType(val, info.PropertyType);
                    }
                }
                info.SetValue(t, obj, null);
            }
        }
    }
    return t;
}

第二种方法

需引用：

程序集:Newtonsoft.Json.dll

命名空间:Newtonsoft.Json

代码如下:

/// <summary>
/// 将object对象转换为实体对象
/// </summary>
/// <typeparam name="T">实体对象类</typeparam>
/// <param name="asObject">object对象</param>
/// <returns></returns>
public static T ConvertObject<T>(object asObject) where T : new()
{
    //此方法将object对象转换为json字符
    var json = Newtonsoft.Json.JsonConvert.SerializeObject(asObject);
    //再将json字符转换为实体对象
    var t = Newtonsoft.Json.JsonConvert.DeserializeObject<T>(json);
    return t;
}

调用方式:

/// <summary>
/// test
/// </summary>
public void test()
{
    var obj = new {
        id=1,name="张三",sex=1,age=22
    };
    //转换
    user userModel = ConvertObject<user>(obj);
}

/// <summary>
/// 用户
/// </summary>
public class user
{
    /// <summary>
    /// 编号
    /// </summary>
    public int id { set; get; }
    /// <summary>
    /// 姓名
    /// </summary>
    public string name { set; get; }
    /// <summary>
    /// 性别
    /// </summary>
    public int sex { set; get; }
    /// <summary>
    /// 年龄
    /// </summary>
    public int age { set; get; }
}

是不是很简单?

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