Control code sharing-date selection control

 
Idea: Select date, year, month, and day
1. You can set the start and end years of a year.
2. Exclude the possibility of incorrect date selection
3. Control using javascript
4. Use the Text attribute to conveniently obtain the set date value
======================================
The code is as follows:
Using System;
Using System. Collections;
Using System. Collections. Specialized;
Using System. ComponentModel;
Using System. IO;
Using System. Text;
Using System. Web. UI;
Using System. Web. UI. Design. WebControls;
Using System. Web. UI. WebControls;
Namespace JSY
{
/// <Summary>
/// AspNetDate select the input date control
/// </Summary>
[DefaultProperty ("Text "),
ParseChildren (false ),
PersistChildren (false ),
Description ("Date control dedicated to ASP. Net Web applications "),
Designer (typeof (DateDesigner )),
ToolboxData ("<{0}: JSYNetDate runat = server> </{0}: JSYNetDate>")]
Public class JSYNetDate: Panel, INamingContainer, IPostBackDataHandler
{
# Region attributes
/// <Summary>
/// Obtain/set the date value.
/// </Summary>
[Bindable (true ),
Browsable (true ),
Description ("Date Value "),
Category ("appearance "),
DefaultValue ("")]
Public string Text
{
Get
{
If (ViewState ["Text"]! = Null)
{
Return ViewState ["Text"]. ToString ();
}
Else
{
If (IsNull)
{
Return "";
}
Else
{
DateTime date = System. DateTime. Today;
String str = "";
Switch (DateFormat)
{
Case "YMD ":
Str = date. ToString ("yyyy-MM-dd", System. Globalization. DateTimeFormatInfo. InvariantInfo );