This value could be // passed in dynamically at run time. // Variable columnQuery is an IEnumerable<int>. // The following query performs two steps: // 1) use Split to break each row (a string) into an array // of strings, // 2) convert the element at position examNum to an ...
One way to dynamically specify multiple predicate filters is to use the Contains method, as shown in the following example. The query returns different results based on the value of id when the query is executed. C# Copy int[] ids = [ 111, 114, 112 ]; var queryNames = from student ...
(); MultiColumns(lines); }staticvoidSingleColumn(IEnumerable<string> strs,intexamNum){ Console.WriteLine("Single Column Query:");// Parameter examNum specifies the column to// run the calculations on. This value could be// passed in dynamically at run time.// Variable columnQ...
C# Linq Group By on multiple columns C# LINQ List<KeyValuePair<string, KeyValuePair<int, int>>> Group by to List<KeyValuePair<string, List<KeyValuePair<int, int>>> C# LINQ one condition, return multiple columns and rows C# LINQ order by not working for a SQL table with a primary ke...
We could instead chain Union operators, but this would be inefficient. The ideal approach is to dynamically construct a lambda expression tree that performs anor-based predicate. Of all the things that will drive you to manually constructing expression trees, the need for dynamic predicates is the...
We have an extension method that updates all the columns in the database: using LinqToDB; using var db = new DbNorthwind(); db.Update(product); And we also have a lower level update mechanism: using LinqToDB; using var db = new DbNorthwind(); db.Product .Where(p => p.ProductID ...
Now since there are multiple rows and columns, it is better to add another control on your .aspx form named as Detail View or Master control below the Grid View control to display only the details of a selected row of the grid. Choose the Detail View Tasks from the Detail View control ...
//Build queries dynamically over Queryable collection if (!string.IsNullOrEmpty(fileNumber)) fileCollection = fileCollection.Where(a => a.FileRevision == fileNumber && a.IsDeleted == false); //Apply skip and take and load records return fileCollection.OrderBy(a=>a.Id).Skip(()=>skip).Tak...
Transposes the rows of a sequence into columns. Traverses a tree in a breadth-first fashion, starting at a root node and using a user-defined function to get the children at each node of the tree. Traverses a tree in a depth-first fashion, starting at a root node and using a user...
You can sort the data by static values when you develop the Web page. You can also enable users to dynamically sort the data at run time. To order the data according to static values, assign the name of a property to the OrderBy property. To let users sort the data at run time, ...