Sys.InvalidOperationException: Could not find UpdatePanel with ID 'ctl00_ContentPlaceHolder1_updatePanel1'. If it is being updated dynamically then it

This is one error that has no concrete solution. I just happened to come across it and decided to blog it after having fixed it.

Sys.InvalidOperationException: Could not find UpdatePanel with ID 'ctl00_ContentPlaceHolder1_updatePanel1'. If it is being updated dynamically then it must be inside another updatepanel'

The error usually occurs when we add some user controls(child controls) inside another user control(parent control) or in a similar situation using Web Parts. Modifying a property of an Update Panel in the child control usually throws an error. However, this is only if the Update Panel in the child control is not inside the property of the UpdatePanel in the parent control.

In lay man terms we are supposed to treat the Update Panel of the parent control as a PlaceHolderControl for the Child Controls which are inside unique Update Panels already.

Hope that helps.
Please feel free to comment and seek clarifications if required.

Sorting using C# generics

Using anonymous methods and generics can change the nature of coding as a whole and C# does a great job in providing the coveted flexibility to a developer.
Initially, it looks like a whole lot of paradigm shift but later it becomes a habit and more so, an addiction.

Here is an example that shows one of the shortest ways to sort a list of Persons according to any property desired.(Class: Person, List stands for the generic list which is having a type Person now).

Lets us enter some code.

//Class Person

public class Person
{
public string Name { get; set; }
public int Age { get; set; }
public int Salary { get; set; }
public Person(string name, int age, int salary)
{
this.Name = name;
this.Age = age;
this.Salary = salary;
}
}

//Initializing a list of Persons
//This may not be static for this example.
//But we might have to make it static for a later example.

static List persons = new List();
public bool isEqual { get; set; }

persons.Add(new Person("chander", 26, 88000));
persons.Add(new Person("jiggi", 26, 80000));
persons.Add(new Person("puneet", 26, 90000));
persons.Add(new Person("chander", 26, 95000));
persons.Add(new Person("jiggi", 26, 10000));
persons.Add(new Person("chander", 26, 85000));
persons.Add(new Person("chander", 26, 1000000));
persons.Add(new Person("jiggi", 26, 34535));
persons.Add(new Person("chander", 26, 86000));

//Sorting according to a property of the class Person.
//It is just a matter of one line code.

persons.Sort(delegate(Person p1, Person p2) { return p1.Name.CompareTo(p2.Name); });

//The anonymous delegate sorts the list 'persons' according to the 'Name' property.
//Replacing 'Name' by other properties could easily make it sortable by that property.

//This could be now printed using a foreach statement

foreach (Person p in persons)
{
Console.Writeline("Name {0}, Salary {1}, Age {2}",p.Name, p.Salary, p.Age);
}
Console.Readkey();


//Comments
//The whole code is just trivia and it's only one line of code that makes it happen. YAY!!!