Code Example: Converting a Dynamic Variable to a Long in C#

Representations of s will never lose data and have a defined manipulation process for converting data in memory into a new format. However, s, which are floating point values with a larger range than s, cannot ensure data loss prevention. Therefore, C# mandates an explicit conversion via the explicit cast to notify the compiler that data loss is acceptable. Reflective techniques are necessary to achieve this for fields, but not for local variables, which are inaccessible via reflection.


Solution 1:

The functionality described is not available in C#. One alternative is to utilize an

ExpandoObject

object and assign a member to it, although this differs from the PHP code. However, you will still need to reference the

ExpandoObject

using a variable name.

dynamic myObject = new ExpandoObject();
string test = "Hello";
((IDictionary)myObject).Add(test, test);
Console.WriteLine(myObject.Hello);

However, using a

Dictionary

rather than

ExpandoObject

can improve code clarity when you only need to map a name to a value. This approach is essentially the same as the one used internally by

ExpandoObject

, as evidenced by the cast shown in the previous code snippet.


Solution 2:


At the language level, C# is not intended for that purpose, so in order to accomplish it, you’ll need to rely on reflection. However, it’s important to note that this method is only applicable to fields, as local variables cannot be accessed via reflection.


Solution 3:


Reflection enables the attainment of flexible access to the members of a class.

class Foo
{
    string test;
    string hello;
    void Bar()
    {
        test = "hello";
        typeof(Foo).InvokeMember( test, 
           BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.SetField, 
           null, this, new object[] { "newvalue" } );
    }
}

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