Darabonba/Utils/Extensions.cs

using System;
using System.Collections;
using System.Collections.Generic;

namespace Darabonba.Utils
{
    public static class Extensions
    {
        public static bool IsNull<T>(this T data)
        {
            return data == null;
        }
        
        public static string ToSafeString(this object obj, string defaultStr = null)
        {
            if (obj == null)
            {
                return defaultStr;
            }

            try
            {
                return obj.ToString();
            }
            catch
            {
                return defaultStr;
            }
        }

        public static int? ToSafeInt(this object obj)
        {
            if (obj == null)
            {
                return null;
            }

            try
            {
                return Convert.ToInt32(obj);
            }
            catch
            {
                return null;
            }
        }

        public static int ToSafeInt(this object obj, int defaultStr)
        {
            if (obj == null)
            {
                return defaultStr;
            }

            try
            {
                return Convert.ToInt32(obj);
            }
            catch
            {
                return defaultStr;
            }
        }

        public static bool ToSafeBool(this object obj, bool defaultBool = false)
        {
            if (obj == null)
            {
                return defaultBool;
            }

            try
            {
                return Convert.ToBoolean(obj);
            }
            catch
            {
                return defaultBool;
            }
        }

        public static double? ToSafeDouble(this object obj)
        {
            if (obj == null)
            {
                return null;
            }

            try
            {
                return Convert.ToDouble(obj);
            }
            catch
            {
                return null;
            }
        }

        public static double ToSafeDouble(this object obj, double defaultDouble)
        {
            if (obj == null)
            {
                return defaultDouble;
            }

            try
            {
                return Convert.ToDouble(obj);
            }
            catch
            {
                return defaultDouble;
            }
        }

        public static float? ToSafeFloat(this object obj)
        {
            if (obj == null)
            {
                return null;
            }

            try
            {
                return Convert.ToSingle(obj);
            }
            catch
            {
                return null;
            }
        }

        public static float ToSafeFloat(this object obj, float defaultFloat)
        {
            if (obj == null)
            {
                return defaultFloat;
            }

            try
            {
                return Convert.ToSingle(obj);
            }
            catch
            {
                return defaultFloat;
            }
        }


        public static TValue Get<TKey, TValue>(this Dictionary<TKey, TValue> dict, TKey key,
            TValue defaultValue = default(TValue))
        {
            if (dict == null)
            {
                return default(TValue);
            }

            if (key == null)
            {
                return defaultValue;
            }

            return dict.ContainsKey(key) ? dict[key] : defaultValue;
        }

        public static object Get(this IDictionary dic, string key, object defaultVal = null)
        {
            if (dic == null)
            {
                return null;
            }

            if (key == null)
            {
                return defaultVal;
            }

            if (dic.Contains(key))
            {
                return dic[key];
            }

            return null;
        }
    }
}