private void button1_Click(object sender, EventArgs e)
{
txtLog.AppendText(System.Runtime.InteropServices.RuntimeEnvironment.GetSystemVersion() + "\r\n");
int count = 1000000;
OrderInfo testObj = new OrderInfo();
PropertyInfo propInfo = typeof(OrderInfo).GetProperty("OrderId");
txtLog.AppendText("直接访问花费时间： " + "\r\n");
Stopwatch watch1 = Stopwatch.StartNew();
for (int i = 0; i < count; i++)
{
testObj.OrderId = 123;
}
watch1.Stop();
txtLog.AppendText(watch1.Elapsed.ToString() + "\r\n");
SetValueDelegate setter2 = DynamicMethodFactory.CreatePropertySetter(propInfo);
txtLog.AppendText("EmitSet花费时间： " + "\r\n");
Stopwatch watch2 = Stopwatch.StartNew();
for (int i = 0; i < count; i++)
{
setter2(testObj, 123);
}
watch2.Stop();
txtLog.AppendText(watch2.Elapsed.ToString() + "\r\n");
txtLog.AppendText("纯反射花费时间： " + "\r\n");
Stopwatch watch3 = Stopwatch.StartNew();
for (int i = 0; i < count; i++)
{
propInfo.SetValue(testObj, 123, null);
}
watch3.Stop();
txtLog.AppendText(watch3.Elapsed.ToString() + "\r\n");
txtLog.AppendText("-------------------" + "\r\n");
txtLog.AppendText(string.Format("{0} / {1} = {2}",
watch3.Elapsed.ToString(),
watch1.Elapsed.ToString(),
watch3.Elapsed.TotalMilliseconds / watch1.Elapsed.TotalMilliseconds) + "\r\n");
txtLog.AppendText(string.Format("{0} / {1} = {2}",
watch3.Elapsed.ToString(),
watch2.Elapsed.ToString(),
watch3.Elapsed.TotalMilliseconds / watch2.Elapsed.TotalMilliseconds) + "\r\n");
txtLog.AppendText(string.Format("{0} / {1} = {2}",
watch2.Elapsed.ToString(),
watch1.Elapsed.ToString(),
watch2.Elapsed.TotalMilliseconds / watch1.Elapsed.TotalMilliseconds) + "\r\n");
}
public static IList <T> ConvertJsonToList <T>(IEnumerable <JToken> jtokens) where T : class, new()
{
IList <T> list = new List <T>(); //里氏替换原则
T t = default(T);
PropertyInfo[] propertypes = null;
string tempName = string.Empty;
propertypes = t.GetType().GetProperties(); //得到类的属性
foreach (JToken row in jtokens)
{
t = Activator.CreateInstance <T>(); ////创建指定类型的实例
foreach (PropertyInfo pro in propertypes)
{
tempName = pro.Name;
object value = row[tempName];
if (value is System.DBNull)
{
value = "";
}
var setDelegate = DynamicMethodFactory.CreatePropertySetter(pro);
setDelegate(t, value);
}
list.Add(t);
}
return(list);
}
public static T ToDto <T>(this JToken data) where T : new()
{
var tempResult = Activator.CreateInstance <T>(); ////创建指定类型的实例
var propertypes = tempResult.GetType().GetProperties(); //得到类的属性
if (data != null)
{
foreach (PropertyInfo pro in propertypes)
{
var tempName = pro.Name.ToLower();
var value = data[pro.Name] != null ? data[pro.Name] : data[tempName];
var setDelegate = DynamicMethodFactory.CreatePropertySetter(pro);
if (value == null)
{
setDelegate(tempResult, GetDefaultValue(pro.PropertyType));
}
else
{
setDelegate(tempResult, GetValue(pro, value));
}
}
}
else
{
tempResult = data.Deserialize <T>();
}
return(tempResult);
}
public void DynamicMethodFactory_CreatePropertySetter()
{
int value = 5;
PropertyInfo vo = typeof(User).GetProperties().FirstOrDefault(f => f.Name == "Age");
SetValueDelegate setValueDelegate = DynamicMethodFactory.CreatePropertySetter(vo);
User user = new User();
if (setValueDelegate != null)
{
setValueDelegate(user, value);
}
Assert.Equal(user.Age, value);
}
public void DynamicMethodFactory_CreatePropertySetter_VO_INT()
{
int value = 12;
PropertyInfo vo = typeof(User).GetProperties().FirstOrDefault(f => f.Name == "Address");
PropertyInfo property = typeof(Address).GetProperties().FirstOrDefault(f => f.Name == "Number");
SetValueDelegate setValueDelegate = DynamicMethodFactory.CreatePropertySetter(vo, property);
User user = new User();
if (setValueDelegate != null)
{
setValueDelegate(user, value);
}
Assert.True(user.Address != null);
Assert.Equal(user.Address.Number, value);
}
public static void FastSetValue(this PropertyInfo propertyInfo, object obj, object value)
{
if (propertyInfo == null)
{
throw new ArgumentNullException(nameof(propertyInfo));
}
SetValueDelegate setter = (SetValueDelegate)SetterDic[propertyInfo];
if (setter == null)
{
setter = DynamicMethodFactory.CreatePropertySetter(propertyInfo);
SetterDic[propertyInfo] = setter;
}
setter(obj, value);
}
static string Test_SetProperty(int count)
{
StringBuilder sb = new StringBuilder(System.Runtime.InteropServices.RuntimeEnvironment.GetSystemVersion());
sb.AppendLine();
sb.AppendLine("Test_SetProperty");
OrderInfo testObj = new OrderInfo();
PropertyInfo propInfo = typeof(OrderInfo).GetProperty("OrderID");
sb.Append("直接访问花费时间： ");
Stopwatch watch1 = Stopwatch.StartNew();
for (int i = 0; i < count; i++)
{
testObj.OrderID = 123;
}
watch1.Stop();
sb.AppendLine(watch1.Elapsed.ToString());
SetValueDelegate setter2 = DynamicMethodFactory.CreatePropertySetter(propInfo);
sb.Append("EmitSet花费时间： ");
Stopwatch watch2 = Stopwatch.StartNew();
for (int i = 0; i < count; i++)
{
setter2(testObj, 123);
}
watch2.Stop();
sb.AppendLine(watch2.Elapsed.ToString());
sb.Append("纯反射花费时间： ");
Stopwatch watch3 = Stopwatch.StartNew();
for (int i = 0; i < count; i++)
{
propInfo.SetValue(testObj, 123, null);
}
watch3.Stop();
sb.AppendLine(watch3.Elapsed.ToString());
sb.Append("泛型委托花费时间： ");
SetterWrapper <OrderInfo, int> setter3 = new SetterWrapper <OrderInfo, int>(propInfo);
Stopwatch watch4 = Stopwatch.StartNew();
for (int i = 0; i < count; i++)
{
setter3.SetValue(testObj, 123);
}
watch4.Stop();
sb.AppendLine(watch4.Elapsed.ToString());
//Console.Write("通用接口花费时间： ");
//ISetValue setter4 = GetterSetterFactory.CreatePropertySetterWrapper(propInfo);
//Stopwatch watch5 = Stopwatch.StartNew();
//for (int i = 0; i < count; i++)
// setter4.Set(testObj, 123);
//watch5.Stop();
//Console.WriteLine(watch5.Elapsed.ToString());
//propInfo.FastSetValue(testObj, 123);
//Console.Write("FastSet花费时间： ");
//Stopwatch watch6 = Stopwatch.StartNew();
//for (int i = 0; i < count; i++)
// propInfo.FastSetValue(testObj, 123);
//watch6.Stop();
//Console.WriteLine(watch6.Elapsed.ToString());
//propInfo.FastSetValue2(testObj, 123);
//Console.Write("FastSet2花费时间： ");
//Stopwatch watch6b = Stopwatch.StartNew();
//for (int i = 0; i < count; i++)
// propInfo.FastSetValue2(testObj, 123);
//watch6b.Stop();
//Console.WriteLine(watch6b.Elapsed.ToString());
//Hashtable table = new Hashtable();
//table[propInfo] = new object();
//Console.Write("Hashtable花费时间： ");
//Stopwatch watch7 = Stopwatch.StartNew();
//for (int i = 0; i < count; i++)
//{
// object val = table[propInfo];
//}
//watch7.Stop();
//Console.WriteLine(watch7.Elapsed.ToString());
sb.AppendLine("-------------------");
sb.Append("纯反射/直接赋值： ");
sb.AppendFormat("{0} / {1} = {2}",
watch3.Elapsed.ToString(),
watch1.Elapsed.ToString(),
watch3.Elapsed.TotalMilliseconds / watch1.Elapsed.TotalMilliseconds);
sb.AppendLine();
sb.Append("纯反射/EmitSet： ");
sb.AppendFormat("{0} / {1} = {2}",
watch3.Elapsed.ToString(),
watch2.Elapsed.ToString(),
watch3.Elapsed.TotalMilliseconds / watch2.Elapsed.TotalMilliseconds);
sb.AppendLine();
sb.Append("EmitSet/直接赋值： ");
sb.AppendFormat("{0} / {1} = {2}",
watch2.Elapsed.ToString(),
watch1.Elapsed.ToString(),
watch2.Elapsed.TotalMilliseconds / watch1.Elapsed.TotalMilliseconds);
//Console.WriteLine("{0} / {1} = {2}",
// watch3.Elapsed.ToString(),
// watch5.Elapsed.ToString(),
// watch3.Elapsed.TotalMilliseconds / watch5.Elapsed.TotalMilliseconds);
//Console.WriteLine("{0} / {1} = {2}",
// watch3.Elapsed.ToString(),
// watch6.Elapsed.ToString(),
// watch3.Elapsed.TotalMilliseconds / watch6.Elapsed.TotalMilliseconds);
return(sb.ToString());
}
