Question

When trying to call this function in my code i get the error in the title. Also Operator ‘+=’ cannot be applied to the operands of type ‘int’ and ‘T’

public int Change<T>(Stats type, T value)
    {
        Dictionary<string, string> temp = new Dictionary<string, string>();
        temp = sql.Query(string.Format("SELECT {0} FROM player WHERE fbId='{1}'", type.ToString(), FBId));
        if (typeof(T) == typeof(int))
        {
            int t = Convert.ToInt16(temp[type.ToString()]);
            t += value;
            if (t < 0) return -1;
            PlayerStats[type] = t;

        }
        sql.Upload(string.Format("UPDATE player SET {0}='{1}' WHERE fbId='{2}'", type.ToString(), PlayerStats[type], FBId));
        return 0;
    }

I call the function by using:

Change<int>(type, 1);

Answer 1

Casting the value with int() won’t work. It will raise an error "Cannot convert type ‘T’ to ‘int’ ". Thanks to Yatharth Varshney comment for pointing this out.

t += (int)value; 

But you can convert it using System.Convert class:

t+= Convert.ToInt32(value);