Checks whether the string starts with a number or not : String Search « Data Types « C# / C Sharp

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Checks whether the string starts with a number or not

   
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace WebOssApplications.Common
{
    public static class Extensions
    {
        /// <summary>
        /// Checks whether the string starts with a number or not
        /// </summary>
        /// <param name="value">Value to check</param>
        /// <returns>True if the string starts with a number</returns>
        /// <exception cref="ArgumentNullException">Throws if value is null</exception>
        /// <exception cref="ArgumentOutOfRangeException">Throws if value is empty</exception>
        public static bool StartsWithNumber(this string value)
        {
            if (value == null)
            {
                throw new ArgumentNullException("value");
            }

            if (string.IsNullOrEmpty(value))
            {
                throw new ArgumentOutOfRangeException("value");
            }

            return char.IsDigit(value, 0);
        }

    }
}

   
    
    
  

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