C# 克隆对象、复制对象（浅拷贝）、复制对象相同属性的值

作者:C/S框架网|www.cscode.ne 发布日期:2021/05/29 15:30:35

C# 克隆对象、复制对象（浅拷贝）、复制对象相同属性的值

1. 复制单个对象, 浅拷贝.

C# Code:

/// <summary>
/// 复制对象, 仅复制对象相同属性的值. 浅拷贝.
/// </summary>
/// <param name="source"></param>
/// <returns></returns>
public static object CloneObject(object source)
{
try
{
if (source == null) return null;
Type objType = source.GetType();
object destObj = objType.Assembly.CreateInstance(objType.FullName);
PropertyInfo[] propsSource = objType.GetProperties();
foreach (PropertyInfo infoSource in propsSource)
{
object value = infoSource.GetValue(source, null);
infoSource.SetValue(destObj, value, null);
}
return destObj;
}
catch { return null; }
}

//来源:C/S框架网 | www.csframework.com | QQ:23404761

2. 复制多个对象, 浅拷贝.

C# Code:

/// <summary>
/// 复制对象, 仅复制对象相同属性的值. 浅拷贝.
/// </summary>
/// <param name="source"></param>
/// <returns></returns>
public static T CloneObject<T>(T source) where T : new()
{
try
{
if (source == null) return default(T);
Type objType = source.GetType();
T destObj = Activator.CreateInstance<T>();
PropertyInfo[] propsSource = objType.GetProperties(BindingFlags.Instance | BindingFlags.Public);
foreach (PropertyInfo infoSource in propsSource)
{
object value = infoSource.GetValue(source, null);
SetPropertyValue(destObj, infoSource, value);
}
return destObj;
}
catch { return default(T); }
}

//来源:C/S框架网 | www.csframework.com | QQ:23404761

3. 复制对象相同属性的值.

C# Code:

/// <summary>
/// 复制对象相同属性的值.
/// </summary>
public static void CopyProperties(object source, object destObj)
{
try
{
if (source == null || destObj == null) return;

PropertyInfo[] propsDest = destObj.GetType().GetProperties();
foreach (PropertyInfo infoDest in propsDest)
{
object value = GetValueOfObject(source, infoDest.Name);
//if (CanShallowCopyProperty(value))
SetPropertyValue(destObj, infoDest, value);
}
}
catch { }
}

//来源:C/S框架网 | www.csframework.com | QQ:23404761

4. Object to Object. 将一个对象复制为指定类型的对象（复制对象相同属性的值）.

C# Code:

/// <summary>
/// Object to Object. 将一个对象转换为指定类型的对象.
/// 注意: destination内的Property必需在source内存在.
/// </summary>
public static object CopyProperties(object source, Type destination)
{
try
{
if (source == null) return null;
object destObj = destination.Assembly.CreateInstance(destination.FullName);
PropertyInfo[] propsDest = destObj.GetType().GetProperties();
foreach (PropertyInfo infoDest in propsDest)
{
object value = GetValueOfObject(source, infoDest.Name);
SetPropertyValue(destObj, infoDest, value);
}
return destObj;
}
catch { return null; }
}

//来源:C/S框架网 | www.csframework.com | QQ:23404761

C# Code:

/// <summary>
/// 给对象的属性赋值
/// </summary>
/// <param name="instance">对象实例</param>
/// <param name="prop">对象实例的属性信息</param>
/// <param name="value">其他对象属性的值</param>
public static void SetPropertyValue(object instance, PropertyInfo prop, object value)
{
try
{
if (prop == null) return;

if (prop.PropertyType.IsArray)//数组类型,单独处理
{
if (value == DBNull.Value)//特殊处理DBNull类型
prop.SetValue(instance, null, null);
else
prop.SetValue(instance, value, null);
}
else
{
if (value == null || String.IsNullOrWhiteSpace(value.ToString()))//空值
value = prop.PropertyType.IsValueType ? Activator.CreateInstance(prop.PropertyType) : null;//值类型
else
value = System.ComponentModel.TypeDescriptor.GetConverter(prop.PropertyType).ConvertFromString(value.ToString());//创建对象

prop.SetValue(instance, value, null);
}
}
catch (Exception ex) //报错在此跟踪
{
}
}

//来源:C/S框架网 | www.csframework.com | QQ:23404761

C# Code:

/// <summary>
/// 获取对象指定属性的值
/// </summary>
public static object GetValueOfObject(object obj, string property)
{
try
{
if (obj == null) return null;
Type type = obj.GetType();
PropertyInfo[] pinfo = type.GetProperties();
foreach (PropertyInfo info in pinfo)
{
if (info.Name.ToUpper() == property.ToUpper())
return info.GetValue(obj, null);
}
return null;
}
catch { return null; }
}

//来源:C/S框架网 | www.csframework.com | QQ:23404761

参考文档：

C# 实现对象浅拷贝Copy(极速复制对象)
GoF设计模式：原型模式(Prototype Pattern)—对象的克隆-C/S开发框架
DataTable与Object互相转换及相关函数转换大全(DataConvert类)
C# 对象克隆 TOut ObjectHelper.Clone |C/S开发框架
C# .NET 入门概念与知识点总结|C/S开发框架
C#源代码安全缺陷与提高源代码质量解决方案
【原创】C# 深度拷贝对象使用.NET反射+递归原理实现深度克隆
ACTIVE OBJECT 模式(转)