屬性IsArray會false傳回 類別Array。 如果目前的實例是Type物件,表示集合類型或設計來使用集合的介面,例如IEnumerable或IEnumerable<T>,它也會傳回false。 若要檢查陣列,請使用下列程式碼: C# typeof(Array).IsAssignableFrom(type) 如果目前的型別代表泛型型別,或泛型型別或泛型方法定義中的型別參數,這個屬性一律會...
("{0,-15} IsArray = {1}", t.Name +":", t.IsArray); } }// The example displays the following output:// String: IsArray = False// Int32[]: IsArray = True// ArrayList: IsArray = False// Array: IsArray = False// List`1: IsArray = False// IEnumerable`1: IsArray = ...
Hey Guys, I am mapping an array in a class. In my source class it is null but when it gets mapped it becomes an array of 0 size. I have tried the : Mapper.Initialize(c => { c.AllowNullDestinationValues = true; }); option but this does not keep the array as a null value and...
BitArray CaseInsensitiveComparer CaseInsensitiveHashCodeProvider CollectionBase 比较器 DictionaryBase DictionaryEntry Hashtable ICollection IComparer IDictionary IDictionaryEnumerator IEnumerable IEnumerator IHashCodeProvider IList 队列 ReadOnlyCollectionBase SortedList ...
(numbers)); // output: 1 var letters = new List<char> { 'a', 'b', 'c', 'd' }; Console.WriteLine(GetSourceLabel(letters)); // output: 2 static int GetSourceLabel<T>(IEnumerable<T> source) => source switch { Array array => 1, ICollection<T> collection => 2, _ => 3, }...
usingSystem;usingSystem.Collections;publicclassExample{publicstaticvoidMain(){ Type t =typeof(IEnumerable); Type c =typeof(Array); IEnumerable instanceOfT;int[] instanceOfC = {1,2,3,4};if(t.IsAssignableFrom(c)) instanceOfT = instanceOfC; } } ...
Append(IEnumerable<OpenXmlElement>) Appends each element from a list of elements to the end of the current element's list of child elements. (Inherited from OpenXmlElement) Append(OpenXmlElement[]) Appends each element from an array of elements to the end of the current element's list...
Assume that you use the XmlSerializer class to serialize an array of structs that implements IEnumerable interfaceexplicitly. In this situation, a System.Reflection.TargetInvocationException exception is thrown in the .NET Framework 4...
Using the LINQ methoddom.FirstOrDefault()might be a better choice for many situations. In javascript, you'd often test theLengthproperty of a selection to see if there were any results. TheCQobject exposes anIEnumerable<IDomObject>interface, so you can use LINQ to simplify many operations. ...
Assume that you use the XmlSerializer class to serialize an array of structs that implements IEnumerable interfaceexplicitly. In this situation, a System.Reflection.TargetInvocationException exception is ...