Simple examples of custom implicit conversions and explicit conversions in C #

Simple examples of custom implicit conversions and explicit conversions in C # (from Zhu Zhu Homeland http://blog.csdn.net/zhgl7688)

Example: The user name First name and last name are converted to a composite with a qualified length of 10 characters descriptors name.

Custom Implicit conversions:

namespace transduction{public partial class Transductionform:form {public Transductionform () {        InitializeComponent (); private void Btndisplay_click (object sender, EventArgs e) {User user = new User () {FirstName            = TextBox1.Text, LastName = TextBox2.Text};            Limitedname Limitedname = user;//Converts the user to Limitedname string lName = limitedname;//converts limitedname to string type        LISTBOX1.ITEMS.ADD (LName);        }} class Limitedname {const int maxnamelength = 10;//The longest name is 10 characters private string _name;            public string Name {get {return _name;} set {_name = value. Length < 10? Value:value. Substring (0, 10); }} public static implicit operator limitedname (user user)//public static implicit operator is required, name Limitedna        The Me is the target type and the parameter user is the source data. {Limitedname ln = new Limitedname ();//Establish target instance ln. Name = user. FirstName + uSer.        lastname;//assigns the source data to the target instance return ln; public static implicit operator string (limitedname ln)//{return ln.        name;//returns the data for the target instance.        }} class User {public string FirstName {get; set;}    public string LastName {get; set;} }}

To customize an explicit conversion:

Replace the implicit with explicit in the above program,

Limitedname limitedname = (limitedname) user;//Add an explicit conversion type to user

This document was written by Zhu Zhu, reproduced please indicate from Zhu Zhu Homeland http://blog.csdn.net/zhgl7688

Simple examples of custom implicit conversions and explicit conversions in C #