Common data type conversion functions-including void primitive types

        Protected T tryparser <t> ( Object  V, t dvalue ){  If (V = Null  ){  Return  Dvalue ;}  Else  {T = Default  (T );  Try {  If (T = Null ) //  Null type  {Type = Typeof  (T); typeconverter Conv = Typedescriptor. getconverter (type); t = (T) Conv. convertfrom (V );}  Else {T = (T) convert. changetype (V, Typeof  (T ));}}  Catch  {T = Dvalue ;}  Return  T ;}}  Protected T tryparser <t> ( String  V, t dvalue ){  If ( String  . Isnullorempty (V )){  Return  Dvalue ;}  Else  {T = Default  (T );  Try  {  If (T = Null ) //  Null type {Type = Typeof  (T); typeconverter Conv = Typedescriptor. getconverter (type); t = (T) Conv. convertfrom (V );}  Else  {T = (T) convert. changetype (V, Typeof  (T ));}}  Catch {T = Dvalue ;}  Return  T ;}}

 

Judge the null type

Bool isnullabletype (type thetype)
{
Return (thetype. isgenerictype & thetype.
Getgenerictypedefinition (). equals
(Typeof (nullable <> )));
}

Test of null type

// ==== Convert to string representation ========

Public static string convertostr (Object OBJ)
{

If (obj. GetType (). isprimitive | obj is string)
{
Return obj. tostring ();
}
If (isnullable (obj. GetType ()))
{
Return obj. tostring ();
}
// Execute XML serialization
Xmlserializer = new xmlserializer (obj. GetType ());
Stringbuilder sb = new stringbuilder ();
Xmlserializer. serialize (New stringwriter (SB), OBJ );

 

Return sb. tostring ();
}
Private Static bool isnullable (type T)
{
Return T. isgenerictype & T. getgenerictypedefinition () = typeof (nullable <> );
}