Question

net. I have a doubt. How do we introduce user defined variables as parameters in where clause of a LINQ query. I am querying an XML file. Here is my code

    XElement books = XElement.Load(@"Friends.xml");

var titles =
   from book in books.Elements("Friend")
   where (string)book.Element("Date") == "27" && (string)book.Element("Month") == "05"
   select book.Element("Name");

foreach (var title in titles)
   Console.WriteLine(title.Value);

Instead of harcoding values 27 and 05, I want to use variables instead.How to use them?

Sorry for the dumb question, I misunderstood the problem. Actually I am blocking certain dates in a calendar. Now using the

private void calendar1_SelectedDatesChanged(object sender, SelectionChangedEventArgs e)
        {....}

works only for non blocked dates. Since a particular day I tried with the variable was a blocked one, it wasn’t working. Now please suggest me a solution for this. All I need is to click on a date(blocked or non blocked) and I have to run a event. Which event should I use??

Answer 1

use a simply variable:

 XElement books = XElement.Load(@"Friends.xml");
string yourDate = "27";
string yourMonth = "05";

var titles =
   from book in books.Elements("Friend")
   where (string)book.Element("Date") == yourDate  && (string)book.Element("Month") == yourMonth
   select book.Element("Name");

foreach (var title in titles)
   Console.WriteLine(title.Value);

And so on. Of course, use good names that are readable according your code and system