C#

public interface IValidator
{
     bool Validate(/* ... */);
}

N a v a n e e t h wrote:

Keep all the available validation classes full name in the configuration file.

N a v a n e e t h wrote:

You can use reflection to create instance of these classes. To create instance, work with Activator.CreateInstance() method. Cast the return value of Activator.CreateInstance() to IValidator and call Validate() method on this object to perform validation.

N a v a n e e t h wrote:

You can just modify the configuration file when new validator has to be added. No program recompilation is required.

neualex wrote:

If I understand this correctly, once I have all possible validation classes implemented with the same interface... should I just leave the *.cs files by themselves or do I need to compile those as well so the main class can load them?

neualex wrote:

If you happen to have a small working project similar to what we are trying to accomplish here, can you share it?

public interface IValidator
{
   bool Validate(object itemToValidate);
}

public sealed class FirstValidation : IValidator
{
    public bool Validate(object itemToValidate)
    {
        /* Your code for validation */
    }
}

public sealed class SecondValidation : IValidator
{
    public bool Validate(object itemToValidate)
    {
        /* Your code for validation */
    }
}

<applicationSettings>
    <TestApplication.Settings1>
        <setting name="ValidationClasses" serializeAs="Xml">
            <value>
                <ArrayOfString xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
                    <string>Test.First</string>
                    <string>Test.Second</string>
                </ArrayOfString>
            </value>
        </setting>
    </TestApplication.Settings1>
</applicationSettings>

foreach (string s in Settings1.Default.ValidationClasses)
{
    Type type = Type.GetType(s);
    IValidator validator = (IValidator)Activator.CreateInstance(type);
    validator.Validate();
}

neualex wrote:

Am I interpreting this correctly