var fullNames = new[] {"Anne Williams","John Fred Smith","Sue Green"}.AsQueryable();// 将字符串拆分,输出 Anne Williams John Fred Smith Sue GreenIEnumerable<string> query2 = fullNames.SelectMany (name => name.Split()); var numbers = new[] {1,2,3}.AsQueryable(); var letters = ...
var q=strings.GroupBy(s=>s[0]);//<- group by first character of each string foreach(var ginq) { Console.WriteLine("Group: {0}", g.Key); foreach(stringving) { Console.WriteLine("\tValue: {0}", v); } } } publicstaticvoidSample8() { //use GroupBy() and aggregates such as...
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Use the first character of Company as the key value. // Select Company appended to TrackingNumber for each element value in the Lookup. Lookup<char, string> lookup = (Lookup<char, string>)packages.ToLookup(p => p.Company[0], p => p.Company + " " + p.TrackingNumber); // Iterate...
=SystemInfo.GetCpuCount();// 获取CPU核心数varipAddress=SystemInfo.GetLocalIPs();// 获取本机所有IP地址stringlocalUsedIp=SystemInfo.GetLocalUsedIP();// 获取本机当前正在使用的IP地址IList<string>macAddress=SystemInfo.GetMacAddress();// 获取本机所有网卡mac地址stringosVersion=Windows.GetOsVersion();...
Query expressions are a single line of code; you can just append additional query clauses to the end of the query. You can break up a query across multiple lines of text to improve readability by using the underscore (_) line-continuation character. The following code example shows an ...
Gets the Type of the current instance. (Inherited from Object) GetUniqueIDRelativeTo(Control) Returns the prefixed portion of the UniqueID property of the specified control. (Inherited from Control) GetView(String) Gets the data source view that is associated with the QueryableDataSource ...
Partial methods, first appearing in Chapter 8, Classes and Inheritance. Object initializers, demonstrated in Chapter 9, Functional Programming. Other new language and compiler features that must not have been important enough since they didn't get their own new cool-sounding names. Anonymous Types ...
Use the first character of Company as the key value. // Select Company appended to TrackingNumber for each element value in the Lookup. Lookup<char, string> lookup = (Lookup<char, string>)packages.ToLookup(p => p.Company[0], p => p.Company + " " + p.TrackingNumber); // Iterate...
{ Company ="Wide World Importers", Weight =33.8, TrackingNumber =4665518773L} };// Create a Lookup to organize the packages.// Use the first character of Company as the key value.// Select Company appended to TrackingNumber// as the element values of the Lookup.ILookup<char,string> ...