Learn the WebForms technology of. NET through cases (III.)
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DropDownList:
DropDownList the <select in the corresponding form element. > We also have two ways of defining his definition.
<asp:dropdownlist id= "DropDownList1" runat= "Server" >
<asp:listitem>item 1</asp:listitem>
<asp:listitem>item 2</asp:listitem>
<asp:listitem>item 3</asp:listitem>
<asp:listitem>item 4</asp:listitem>
</asp:DropDownList>
How code is defined:
DropDownList dropdownlist1=new DropDownList ();
The key to the use of the attributes are mainly:
SelectedItem This property is a ListItem Class and we're going to explain the ListItem attribute.
ListItem Property,
Because what we are most concerned about DropDownList is the results we get when we choose to DropDownList.
So, the nature of our most concern for ListItem is the text and Value properties
Text is the result of ListItem in appearance
Value is the real value of the Item we selected
In conclusion, we summarize the usage of the SelectedItem attribute of DropDownList
DropDownList1. Selecteditem.text and DropDownList1. Selecteditem.value
