IDataPacker.ContainsKey(string key) Method

.NET Standard 2.x

Checks whether a specified element exists in the current IDataPacker object.

Namespace: SnapObjects.Data

Assembly: SnapObjects.Data.dll

Syntax

 bool ContainsKey(string key);

Parameters

key System.String

The key of the element to look for.

Returns

System.Boolean

Returns true if the element exists; otherwise, false.

Examples

The following code example adds two keys and values to the IDataPacker object and then checks if one of the keys exists in IDataPacker.

using SnapObjects.Data;
using System;

namespace Appeon.ApiDoc.IDataPackerExamples
{
    public class ContainsKeyExample
    {
        private readonly SchoolContext _context;

        public ContainsKeyExample(SchoolContext dataContext)
        {
            // Sets the data context.
            _context = dataContext;
        }

        public void Example()
        {
            var packer = new DataPacker();

            // Adds the key "FirstParam" and its value "NameValue1" to DataPacker
            // Adds the key "SecondParam" and its value "NameValue2" to DataPacker
            packer.AddValue("FirstParam", "NameValue1");
            packer.AddValue("SecondParam", "NameValue2");

            // Gets and shows the number of elements in IDataPacker
            Console.WriteLine("The element count: {0}", packer.Count.ToString());

            // Checks if the key name "FirstParam" exists in IDataPacker and returns true
            Console.WriteLine(packer.ContainsKey("FirstParam"));

            // Checks if the key name "Other" exists in IDataPacker and returns false
            Console.WriteLine(packer.ContainsKey("Other"));

            /* This code example produces the following output:
            
            The element count: 2
            True
            False
            */
        }
    }
}

Applies to

.NET Standard

2.x