How to convert an IEnumerable to a DataTable in the same way as we use ToList or ToArray How to find out the data-reader referencing an ADO.NET connection object to fix the error: "There is already an open DataReader associated with...
"IEnumerable<T>'requires '1' type arguments" error "Member names cannot be the same as their enclosing type." "MS Paint" source code is required please "No mapping exists from object type System.Collections.Generic.List "No Overload for method takes 2 arguments" "Object is currently in use...
A continuación se muestra un código de ejemplo para convertir IEnumerable en una lista y volver a IEnumerable.using System; using System.Collections; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace ListToArrayApp { class Program { ...
/// 集合对象 /// <returns>Json字符串</returns> public static string ToArrayString(IEnumerable array) { string jsonString = "["; foreach (object item in array) { jsonString = ToJson(item.ToString()) + ","; } jsonString.Remove(jsonString.Length - 1, jsonString.Length); return jsonS...
This will return anIEnumerable<SomeEnum>of all the values of an Enum. Enum.GetValues(typeof(SomeEnum)).Cast<SomeEnum>(); If you want that to be aList<SomeEnum>, just add.ToList()after.Cast<SomeEnum>(). To use the Cast function on an Array you need to have theSystem.Linqin your...
Select(c => new ProjectedType(c)).ToArray(); } private static IEnumerable<TypeReference> RecursiveGetTypes(TypeReference type) { yield return type; if (type is GenericInstanceType gen) { foreach (var t in gen.GenericArguments) { foreach (var tt in RecursiveGetTypes(t)) { yield return ...
》,引起了一些讨论。...我们在一个Console应用中编写了如下一段简单的程序:返回类型为IEnumerable的方法GetItems以yield return的方式返回一个包含三个字符串的集合,而在方法开始的时候我们打印一段文字表明定义在方法中的操作开始执行...在Main方法中,我们先调用GetItems方法将“集合对象”返回,然后调用其ToArray方...
Valid argument Types of the method overloads are: Assembly, Assembly[] , a string of the application's NameSpace, a class Type or any IEnumerable<Type>. Use Add(...) and Add<,>(..) to add new converters at runtime. Most strongly typed generic functions in the library have weakly ...
public static IEnumerable<IMFActivate> EnumerateTransforms(Guid category) { IntPtr interfacesPointer; IMFActivate[] interfaces; int interfaceCount; MediaFoundationInterop.MFTEnumEx(category, _MFT_ENUM_FLAG.MFT_ENUM_FLAG_ALL, null, null, out interfacesPointer, out interfaceCount); interfaces = new IMFAct...
public static string ToJson(IEnumerable array) string jsonString = ""; foreach (object item in array) jsonString += ToJson(item) + ","; jsonString.Remove(jsonString.Length - 1, jsonString.Length); return jsonString + ""; #endregion ...