WebMay 25, 2012 · var query = types.GroupBy (t => t.Type) .Select (g => new { Type = g.Key, Count = g.Count () }); foreach (var result in query) { Console.WriteLine (" {0}, {1}", result.Type, result.Count); } EDIT: If you want it in a dictionary, you can just use: var query = types.GroupBy (t => t.Type) .ToDictionary (g => g.Key, g => g.Count ()); WebDec 29, 2014 · 9. You can use the method syntax. foreach (object obj in listofObjects.Where (obj => !obj.property)) It is also possible using the query syntax but it's not readable (to me at least): foreach (object obj in (from x in listofObjects where !x.property select x)) If you are gonna use that I would store the query into a variable: var query = …
C# 使用foreach循环在可观察集合中查找重复项_C#_Linq_Loops_Foreach…
Webenumerable.Select(e => e.GetName(formatter: nameFormatter)); As you can see, everything gets much easier to read, as each line has only one concern, and you can directly see, where each section ends. 2. The length of one line of code should not exceed half the screen Too long lines of code are hard to read. As you see in the example … WebWorking of C# foreach loop The in keyword used along with foreach loop is used to iterate over the iterable-item. The in keyword selects an item from the iterable-item on each iteration and store it in the variable element. … paolo chelazzi
C# SQL数据库中大量记录的Linq查询和Foreach_C#_Entity …
WebJun 7, 2015 · @Jipo That .Select ( (x, i)) syntax is used to select both the value and the index of that value from the list. The new { Index = i, Value = x } afterwards is simply creating an anonymous type and naming the index and value appropriately. – Laurence 2 days ago Add a comment 0 you can try below approach also: WebApr 5, 2024 · Foreach causes a query to be evaluated. Step 1 We create an array of 4 strings that are not sorted in any logical order. Step 2 We specify a query expression. We use orderby to sort the strings. This expression is not evaluated yet—it is lazy. Step 3 With foreach, we evaluate the lazy query expression from step 2, and print each string. WebJul 11, 2012 · theList = dt.AsEnumerable () .Select (row => new CustItem { Name = row.Field ("tName"), Title = row.Field ("tTitle"), }).ToList (); We should Iterate it within a loop and process on the selected 5 items each time, or pass it to our other methods : something like it : for (int i=0; i < 20 ; i++) おい ハンサム 2 話 dailymotion