C# | Copying the SortedList elements to an Array Object (original) (raw)

Last Updated : 01 Feb, 2019

SortedList.CopyTo(Array, Int32) Method is used to copy SortedList elements to a one-dimensional Array object, starting at the specified index in the array.Syntax:

public virtual void CopyTo (Array array, int arrayIndex);

Parameters:

array: It is the one-dimensional Array object that is the destination of the DictionaryEntry objects copied from SortedList. The Array must have zero-based indexing.arrayindex: It is the zero-based index in array at which copying begins.

Exceptions:

ArgumentNullException: If the array is null.
ArgumentOutOfRangeException: If the arrayindex is less than zero.
ArgumentException: If the array is multidimensional or the number of elements in the source SortedList object is greater than the available space from arrayIndex to the end of the destination array.
InvalidCastException: If the type of the source SortedList cannot be cast automatically to the type of the destination array.

Below programs illustrate the use of above-discussed method:Example 1:

CSharp `

// C# code to copy the SortedList elements // to a 1-D Array object, starting at the // specified index in the array using System; using System.Collections;

class Geeks {

// Main Method
public static void Main(String[] args)
{

    // Creating a SortedList of integers
    SortedList mylist = new SortedList();

    // Adding elements to SortedList
    mylist.Add("1", "C#");
    mylist.Add("2", "Java");
    mylist.Add("3", "DSA");
    mylist.Add("4", "Python");
    mylist.Add("5", "C");

    // creating a 1-D array
    DictionaryEntry[] myArr = new DictionaryEntry[mylist.Count];

    // Copying SortedList to Array
    // instance at the specified index
    mylist.CopyTo(myArr, 0);

    // Displaying elements in myArr
    for (int i = 0; i < myArr.Length; i++) {
        Console.WriteLine(myArr[i].Key + "-->" + myArr[i].Value);
    }
}

}

Output:

1-->C# 2-->Java 3-->DSA 4-->Python 5-->C

Example 2:

CSharp `

// C# code to copy the SortedList elements // to a 1-D Array object, starting at the // specified index in the array using System; using System.Collections;

class Geeks {

// Main Method
public static void Main(String[] args)
{

    // Creating a SortedList of integers
    SortedList mylist = new SortedList();

    // Adding elements to SortedList
    mylist.Add("1st", "Ram");
    mylist.Add("2nd", "Shyam");
    mylist.Add("3rd", "Rohit");
    mylist.Add("4th", "Manish");
    mylist.Add("5th", "Vikas");

    // creating a 1-D array
    DictionaryEntry[] myArr = new DictionaryEntry[mylist.Count];

    // Copying SortedList to Array
    // instance at the specified index
    // This will raise "ArgumentOutOfRangeException"
    // as index is less than 0
    mylist.CopyTo(myArr, -2);

    // Displaying elements in myArr
    for (int i = 0; i < myArr.Length; i++) {
        Console.WriteLine(myArr[i].Key + "-->" + myArr[i].Value);
    }
}

}

Runtime Error:

Unhandled Exception: System.ArgumentOutOfRangeException: Non-negative number required. Parameter name: arrayIndex

Reference:

https://docs.microsoft.com/en-us/dotnet/api/system.collections.sortedlist.copyto?view=netframework-4.7.2

C# | Copying the SortedList elements to an Array Object (original) (raw)

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