ignore.Contains(property.Name)letselfValue= property.GetValue(self,null)lettoValue = property.GetValue(to,null)where!Equals(selfValue, toValue)selectproperty;return!unequalProperties.Any(); } PLINQ PLINQ 或 Parallel LINQ 是 LINQ 表达式的并行执行引擎。 换句话说,可以在任意数量的线程之间简单并行化...
ignore.Contains(property.Name)letselfValue= property.GetValue(self,null)lettoValue = property.GetValue(to,null)where!Equals(selfValue, toValue)selectproperty;return!unequalProperties.Any(); } PLINQ PLINQ 或 Parallel LINQ 是 LINQ 表达式的并行执行引擎。 换句话说,可以在任意数量的线程之间简单并行化...
publicclassUser : IEquatable<User>{publicintUserID {get;set; }publicstringName {get;set; }publicstringSex {get;set; }publicboolEquals([AllowNull] User other) {returnName ==other.Name; }publicoverrideintGetHashCode() {returnName?.GetHashCode() ??0; } } varlist1 =newList<User>{newUser...
Property(Expression, PropertyInfo) 创建一个表示访问属性的MemberExpression。 Property(Expression, MethodInfo) 使用属性访问器方法创建一个表示访问属性的MemberExpression。 Property(Expression, String) 创建一个表示访问属性的MemberExpression。 Property(Expression, String, Expression[]) ...
() returns true for a pair of objects// then GetHashCode() must return the same value for these objects.publicintGetHashCode(Product product){//Check whether the object is nullif(Object.ReferenceEquals(product,null))return0;//Get hash code for the Name field if it is not null.inthash...
var q = from c in db.Customers select c.ContactName;注意:这个语句只是一个声明或者一个描述,并没有真正把数据取出来,只有当你需要该数据的时候,它才会执行这个语句,这就是延迟加载(deferred loading)。如果,在声明的时候就返回的结果集是对象的集合。你可以使用ToList() 或ToArray()方法把查询结果先进行...
Gets or sets a value that indicates whether the data from the data source should be stored in view state to make sure that the data has not been changed by another process before it is updated or deleted.
if(@operator==In){varcontains=MethodContains.MakeGenericMethod(typeof(string));objectval=value.EnumerateArray().Select(e=>e.GetString()).ToList();varright=Expression.Call(contains,Expression.Constant(val),property);left=bind(left,right);} ...
Gets or sets the value assigned to or loaded by the Link<T>. Namespace: System.Data.Linq Assembly: System.Data.Linq (in System.Data.Linq.dll) Syntax C# 复制 public T Value { get; set; } Property Value Type: T The value of this deferred property. Version Information Si...
This lets you run queries by saying things like, "Hey LINQ, from this list of employees and their properties, give me just the names of those employees who were hired in the past 90 days." This results set, a collection based on IEnumerable, can be further queried or used as you ...