Using ASP.net implementation to generate non-duplicate order number _ Practical skills

Copy Code code as follows:

#region Generate Document Number
<summary>
Generate Document Number
</summary>
<param name= "Pfromtype" ></param>
<returns></returns>
public static string Getformcode (FormType pfromtype)
{
String formcode = "";
Switch (pfromtype)
{
Case Formtype.caigou:
{
FormCode = "CG";
Break
}
Case Formtype.chaixie:
{
FormCode = "CX";
Break
}
Case Formtype.chuku:
{
FormCode = "CK";
Break
}
Case Formtype.lingliao:
{
FormCode = "LL";
Break
}
Case Formtype.peichang:
{
FormCode = "PC";
Break
}
Case Formtype.ruku:
{
FormCode = "RK";
Break
}
Case Formtype.shengchan:
{
FormCode = "SC";
Break
}
Case Formtype.sunyi:
{
FormCode = "SY";
Break
}
Case Formtype.tuihuo:
{
FormCode = "TH";
Break
}
Case Formtype.xiaoshou:
{
FormCode = "XS";
Break
}
Case Formtype.peisong:
{
FormCode = "PS";
Break
}
Case Formtype.zengpin:
{
FormCode = "ZP";
Break
}
Case Formtype.fukuan:
{
FormCode = "FK";
Break
}
Case Formtype.shoukuan:
{
FormCode = "SK";
Break
}
}
FormCode + + DateTime.Now.Year.ToString ();
FormCode + = DateTime.Now.Month.ToString (). Length = = 1? " 0 "+ DateTime.Now.Month.ToString (): DateTime.Now.Month.ToString ();
FormCode + = DateTime.Now.Day.ToString (). Length = = 1? " 0 "+ DateTime.Now.Day.ToString (): DateTime.Now.Day.ToString ();
FormCode + = DateTime.Now.Hour.ToString (). Length = = 1? " 0 "+ DateTime.Now.Hour.ToString (): DateTime.Now.Hour.ToString ();
FormCode + = DateTime.Now.Minute.ToString (). Length = = 1? " 0 "+ DateTime.Now.Minute.ToString (): DateTime.Now.Minute.ToString ();
FormCode + = DateTime.Now.Second.ToString (). Length = = 1? " 0 "+ DateTime.Now.Second.ToString (): DateTime.Now.Second.ToString ();
if (DateTime.Now.Millisecond.ToString (). Length = = 1)
{
FormCode + + DateTime.Now.Millisecond.ToString ();
}
else if (DateTime.Now.Millisecond.ToString (). Length = = 2)
{
FormCode + = "0" + DateTime.Now.Millisecond.ToString ();
}
Else
{
FormCode + + DateTime.Now.Millisecond.ToString ();
}
return formcode;
}
#endregion