publicstaticclassSumColumns{publicstaticvoidProcessColumns(stringfilePath,stringseperator){// Divide each exam into a groupvarexams =fromlineinMatrixFrom(filePath, seperator)fromscoreinline// Identify the column
[0] into g orderby g.Key select g; foreach (var g in groupQuery) { string fileName = $"testFile_{g.Key}.txt"; Console.WriteLine(g.Key); using StreamWriter sw = new StreamWriter(fileName); foreach (var item in g) { sw.WriteLine(item); // Output to console for example ...
ParameterExpression arrayExpr = Expression.Parameter(typeof(int[,]), "Array"); // This parameter expression represents a first array index. ParameterExpression firstIndexExpr = Expression.Parameter(typeof(int), "FirstIndex"); // This parameter expression represents a second array index. ParameterEx...
var resultList = Array.FindAll(list, s => (s.IndexOf("a") > -1)); foreach (var v in resultList) Response.Write(v+""); s就像是我们在第一个例子中使用的delegate(string s)里面的s一样只是这种使用方法更加的灵活和方便。 四。LINQ 查询 我们就以NorthWind数据库为例,添加一个Linq to Sql...
(System.Reflection.MemberInfo mi in group) Console.WriteLine(mi.Name); // The output is similar to: // Values that have the key 'Method': // get_Chars // get_Length // IndexOf // IndexOfAny // LastIndexOf // LastIndexOfAny // Insert // Replace // Replace // Remove // Join...
select p;foreach(Salary iteminlist){Console.WriteLine("Name={0},\tBaseSalary={1},\tBouns={2}",item.Name,item.BaseSalary,item.Bouns);}Console.WriteLine("根据Bouns排序");varlistBouns=from pinarray orderby p.Bouns select p;foreach(Salary iteminlistBouns){Console.WriteLine("Name={0},\tBa...
var inString = list.FindAll(s => s.Indexof("YJingLee") >= 0); Lambda表达式格式:(参数列表)=>表达式或语句块 具体意义:定义Lambda接受参数列表,运行表达式或语句块返回表达式或语句块的值传给这个参数列表。 Lambda表达式参数类型可以是隐式类型或显式类型。在显式列表中,每个参数的类型是显式指定的,在...
FindIndex Gets the index of the first item found by a filter vararray=["item1","item2","item3","item4","no"];//2array.FindIndex("x => x == 'item3'"); FindLastIndex Gets the index of the last item found by a filter ...
Add one Column runtime to datagrid view at specific index in C# Add picture into specified Excel cell Add registry values in setup project ADD Root Node to XML in C# add string data to IList collection Add strings to list and expiry each item in certain period of time add text file data...
dll but was not handled in user codeAn exception of type 'System.InvalidOperationException' occurred in EntityFramework.dll but was not handled in user code An item with the same key has already been added An unhandled exception of type 'System.TypeInitializationException' occurred in mscorlib....