static public void UnwrapControl(System.Web.UI.Page pgUnwrap, String strUnwrap)
{
Regex r3 = new Regex("(&&&)"); // Split on hyphens.
Regex r2 = new Regex("(&&)"); // Split on hyphens.
Regex r1 = new Regex("(&)"); // Split on hyphens.
String[] sa3, sa2, sa1;
String s3, s2, s1;
int i3, i2, i1;
String strId, strTagName;
System.Web.UI.Control ctrlUnwrap;
DropDownList ddlUnwrap;
ListItem liAdd;
s3 = strUnwrap;
sa3 = r3.Split(s3);
for(i3=0;i3<(sa3.Length+1)/2;i3++)
{
s2 = sa3[i3*2];
if(s2.Length>0)
{
sa2 = r2.Split(s2);
if(sa2.Length>1)
{
s1 = sa2[0];
sa1 = r1.Split(s1);
if(sa1.Length==3)
{
strId = sa1[0];
strTagName = sa1[2];
ctrlUnwrap = pgUnwrap.FindControl(strId);
if(ctrlUnwrap !=null)
{
if(strTagName == "SELECT")
{
ddlUnwrap = (DropDownList)ctrlUnwrap;
ddlUnwrap.Items.Clear();
for(i2=1; i2 < (sa2.Length+1)/2;i2++)
{
s1 = sa2[i2*2];
sa1 = r1.Split(s1);
liAdd = new System.Web.UI.WebControls.ListItem(sa1[4],sa1[2]);
ddlUnwrap.Items.Add(liAdd);
}
}
}
}
}
}
}
}
（出处：清风网络学院）
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