Question

I want to create a function to convert any null value e.g. from a database to an empty string.
I know there are methods such as if value != null ?? value : String.Empty but is there a way to pass null to a method e.g.

public string nullToString(string? value)
{
    if(value == null) return empty;
    return value
}

But I am not sure on the parameter syntax to do this.

I tried the above but it says not a nullable type.

Answer 1

static string NullToString( object Value )
{

    // Value.ToString() allows for Value being DBNull, but will also convert int, double, etc.
    return Value == null ? "" : Value.ToString();

    // If this is not what you want then this form may suit you better, handles 'Null' and DBNull otherwise tries a straight cast
    // which will throw if Value isn't actually a string object.
    //return Value == null || Value == DBNull.Value ? "" : (string)Value;


}