#通過反射獲取對象屬性值並設置屬性值
0、定義一個類
public class User
{
public int Id { get; set; }
public string Name { get; set; }
public string Age { get; set; }
}
1、通過屬性名(字符串)獲取對象屬性值
User u = new User();
u.Name = "lily";
var propName = "Name";
var propNameVal = u.GetType().GetProperty(propName).GetValue(u, null);
Console.WriteLine(propNameVal);// "lily"
2、通過屬性名(字符串)設置對象屬性值
User u = new User();
u.Name = "lily";
var propName = "Name";
var newVal = "MeiMei";
u.GetType().GetProperty(propName).SetValue(u, newVal);
Console.WriteLine(propNameVal);// "MeiMei"
#獲取對象的所有屬性名稱及類型
User u = new User();
foreach (var item in u.GetType().GetProperties())
{
Console.WriteLine($"propName:{item.Name},propType:{item.PropertyType.Name}");
}
// propName: Id,propType: Int32
// propName:Name,propType: String
// propName:Age,propType: String
foreach (var item in typeof(User).GetProperties())
{
Console.WriteLine($"propName:{item.Name},propType:{item.PropertyType.Name}");
}
// propName: Id,propType: Int32
// propName:Name,propType: String
// propName:Age,propType: String
#判斷對象是否包含某個屬性
static void Main(string[] args)
{
User u = new User();
bool isContain= ContainProperty(u,"Name");// true
}
public static bool ContainProperty( object instance, string propertyName)
{
if (instance != null && !string.IsNullOrEmpty(propertyName))
{
PropertyInfo _findedPropertyInfo = instance.GetType().GetProperty(propertyName);
return (_findedPropertyInfo != null);
}
return false;
}
public static class ExtendLibrary
{
/// <summary>
/// 利用反射來判斷對象是否包含某個屬性
/// </summary>
/// <param name="instance">object</param>
/// <param name="propertyName">需要判斷的屬性</param>
/// <returns>是否包含</returns>
public static bool ContainProperty(this object instance, string propertyName)
{
if (instance != null && !string.IsNullOrEmpty(propertyName))
{
PropertyInfo _findedPropertyInfo = instance.GetType().GetProperty(propertyName);
return (_findedPropertyInfo != null);
}
return false;
}
}
static void Main(string[] args)
{
User u = new User();
bool isContain= u.ContainProperty("Name");// true
}