很多时候我们复制一个对象实例A到实例B，在用实例B去做其他事情的时候，会对实例B进行修改，为保证对B的修改不会影响到A的正常使用，就需要使用到深复制。
我在网上搜到一些深复制的方法，同时写了几组例子对这些方法进行测试。
我的操作系统版本为Win7旗舰版，.NET Framework版本是4.5
测试程序
我建了一个C#窗体应用程序（Winform），其主窗口FormMain的Load函数内容如下：
private void FormMain_Load(object sender, EventArgs e)
{
//测试1：深度复制 自定义类
try
{
Console.WriteLine("=== 深度复制 自定义类 ===");
TestClass test1 = new TestClass();
test1.a = 10;
test1.b = "hello world!";
test1.c = new string[] { "x", "y", "z" };
TestClass test2 = new TestClass();
test2.a = 11;
test2.b = "hello world2!";
test2.c = new string[] { "i", "j", "k" };
test1.d = test2;
Console.WriteLine("---test1_start---");
Console.WriteLine(test1);
Console.WriteLine("---test1_end---");
TestClass test3 = (TestClass)DataManHelper.DeepCopyObject(test1);
Console.WriteLine("---test3_start---");
Console.WriteLine(test3);
Console.WriteLine("---test3_end---");
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
//测试2：深度复制 可序列化的自定义类
try
{
Console.WriteLine("=== 深度复制 可序列化的自定义类 ===");
TestClassWithS test1 = new TestClassWithS();
test1.a = 10;
test1.b = "hello world!";
test1.c = new string[] { "x", "y", "z" };
TestClassWithS test2 = new TestClassWithS();
test2.a = 11;
test2.b = "hello world2!";
test2.c = new string[] { "i", "j", "k" };
test1.d = test2;
Console.WriteLine("---test1_start---");
Console.WriteLine(test1);
Console.WriteLine("---test1_end---");
TestClassWithS test3 = (TestClassWithS)DataManHelper.DeepCopyObject(test1);
Console.WriteLine("---test3_start---");
Console.WriteLine(test3);
Console.WriteLine("---test3_end---");
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
//测试3：深度复制 DataTable
try
{
Console.WriteLine("=== 深度复制 DataTable ===");
DataTable dtKirov = new DataTable("TestTable");
dtKirov.Columns.Add("Col1");
dtKirov.Columns.Add("Col2");
dtKirov.Columns.Add("Col3");
dtKirov.Rows.Add("1-1", "1-2", "1-3");
dtKirov.Rows.Add("2-1", "2-2", "2-3");
dtKirov.Rows.Add("3-1", "3-2", "3-3");
Console.WriteLine("=== 复制前 ===");
for (int i = 0; i < dtKirov.Columns.Count; i++)
{
Console.Write(dtKirov.Columns[i].ColumnName + "t");
}
Console.WriteLine("n-----------------");
for (int i = 0; i < dtKirov.Columns.Count; i++)
{
for (int j = 0; j < dtKirov.Rows.Count; j++)
{
Console.Write(dtKirov.Rows[i][j].ToString() + "t");
}
Console.WriteLine();
}
Console.WriteLine();
DataTable dtDreadNought = (DataTable)DataManHelper.DeepCopyObject(dtKirov);
Console.WriteLine("=== 复制后 ===");
for (int i = 0; i < dtDreadNought.Columns.Count; i++)
{
Console.Write(dtDreadNought.Columns[i].ColumnName + "t");
}
Console.WriteLine("n-----------------");
for (int i = 0; i < dtDreadNought.Columns.Count; i++)
{
for (int j = 0; j < dtDreadNought.Rows.Count; j++)
{
Console.Write(dtDreadNought.Rows[i][j].ToString() + "t");
}
Console.WriteLine();
}
Console.WriteLine();
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
