convert String Type to int,float,decimal etc Type on runtime C#

Question

I have made a program in which i wanted to convert all values depending on parameters type which is get by run time methods, what i want is convert all values which are enter by user in textbox in define type of parameter. what i wanted is

private object convertType(Type type, string value)
    {
        Type t = typeof(int);
        //suppose value have stringvalue=33;
        return 33; //of type int
    }

is there any way to get any object type ?

Updated Answer

for @Atmane EL BOUACHRI,

class Program
{
 static void Main()
 {

   var ints =  ConvertType<int>("33");
   var bools = ConvertType<bool>("false");
   var decimals = ConvertType<decimal>("1.33m"); // exception here
   Console.WriteLine(ints);
   Console.WriteLine(bools);
    Console.WriteLine(decimals);

    Console.ReadLine();
 }

 public static T ConvertType<T>(string input)
 {
    T result =  default(T);
    var converter = TypeDescriptor.GetConverter(typeof(T));
    if (converter != null)
    {
        try
        {
            result =  (T)converter.ConvertFromString(input);
        }
        catch 
        {
            // add you exception handling
        }
    }
    return result;
 }
}

Here I don't want hard code <int>, <string> or <decimal>, what I want is

private object convertToAnyType(Type type, string value)
{
    //Type t = typeof(int);
    return ConvertType<type>("33");
}

Is there any way??

I have made dynamic web service call in which any web service is consume by my project, but i was stuck on parameters of different type, how can i handle all parameters of different methods? — Faraz Ahmed
– Faraz Ahmed, Commented Mar 7, 2016 at 12:59
Convert.ChangeType will work for a limited range of built-in types — Lucas Trzesniewski
– Lucas Trzesniewski, Commented Mar 7, 2016 at 12:59

score 1 · Accepted Answer · 2016-03-08 11:00:45Z

1

You mean certainly return string value parsed to a specific Type. Then , I propose generics. Here's how :

1)- Without Generics (I Prefer With Generic in 2)-)

 class Program
    {
        static void Main()
        {

            var ints = (int)ConvertType(typeof(int),"33"); 
            var bools = (bool)ConvertType(typeof(bool), "true");   

            Console.WriteLine(bools);
            Console.WriteLine(ints);

            Console.ReadLine();
        }

        public static object ConvertType(Type type, string input)
        {
            object result = default(object);
            var converter = TypeDescriptor.GetConverter(type);
            if (converter != null)
            {
                try
                {
                    result = converter.ConvertFromString(input);
                }
                catch
                {
                    // add you exception handling
                }
            }
            return  result;
        }
    }

2)-With Generic

class Program
{
    static void Main()
    {

       var ints =  ConvertType<int>("33");
       var bools = ConvertType<bool>("false");
       var decimals = ConvertType<decimal>("1.33m"); // exception here
       Console.WriteLine(ints);
       Console.WriteLine(bools);
        Console.WriteLine(decimals);

        Console.ReadLine();
    }

    public static T ConvertType<T>(string input)
    {
        T result =  default(T);
        var converter = TypeDescriptor.GetConverter(typeof(T));
        if (converter != null)
        {
            try
            {
                result =  (T)converter.ConvertFromString(input);
            }
            catch 
            {
                // add you exception handling
            }
        }
        return result;
    }
}

Hpe it helps

edited Mar 8, 2016 at 11:00

answered Mar 7, 2016 at 13:49

user5447154

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7 Comments

Faraz Ahmed Over a year ago

In my case this is not working int t = 0; int ints = oo.ConvertType<t.GetType()>("33");

user5447154 Over a year ago

@user6002727 I dont understand

Faraz Ahmed Over a year ago

I don't know which type is come from other end, so how can i call this function as "convertType<g.GetType>" , where g is any variable like int, float etc

user5447154 Over a year ago

@user6002727 give me an concret exemple.. You should have a type anyway. a String or Object.

Faraz Ahmed Over a year ago

Updated my post, please review

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