WinForm Review [2] ComboBox control

ComboBox Important attribute: "DropDownStyle" Gets or sets the value of the specified combo box style.

The following is still a small program to review:

The code is as follows:

usingSystem;usingSystem.Windows.Forms;namespaceDate Selector { Public Partial classForm1:form { PublicForm1 () {InitializeComponent (); }        //when the program loads, add the year        Private voidForm1_Load (Objectsender, EventArgs e) {            //get the current year            intYear =DateTime.Now.Year; //Add year             for(inti = year; I >=1949; i--) {CMBYEAR.ITEMS.ADD (i+"years"); }        }        //the month is loaded when a change occurs        Private voidCmbyear_selectedindexchanged (Objectsender, EventArgs e) {            //before adding, you should clean upcmbMonth.Items.Clear (); //Add             for(inti =1; I <= A; i++) {CMBMONTH.ITEMS.ADD (i+"Month"); }        }        //when the month changes, load the day        Private voidCmbmonth_selectedindexchanged (Objectsender, EventArgs e)            {cmbDay.Items.Clear (); //get year, month            stringStryear = CmbYear.SelectedItem.ToString (). Split (New Char[] {'years'}, Stringsplitoptions.removeemptyentries) [0]; stringStrmonth = CmbMonth.SelectedItem.ToString (). Split (New Char[] {'Month'}, Stringsplitoptions.removeemptyentries) [0]; //convert to integral type            intYear =Convert.ToInt32 (stryear); intmonth =Convert.ToInt32 (Strmonth); //declaring a variable to represent the number of days            intDays =0; Switch(month) { Case 1:                 Case 3:                 Case 5:                 Case 7:                 Case 8:                 Case Ten:                 Case  A: Days= to;  Break;  Case 2:                    if(Datetime.isleapyear (year))//Judging Leap years{ days= in; }                    Else{ days= -; }                     Break; default: Days= -;  Break; }             for(inti =1; I <= days; i++) {CMBDAY.ITEMS.ADD (i+"Day"); }        }    }}

Source Code Link: http://pan.baidu.com/s/1pL9eTsf Password: Wvts

WinForm Review [2] ComboBox control