取Panel里的控件问题。
int num=1;
while(reader.Read())
{
RadioButtonList rbtnList=new RadioButtonList();
rbtnList.ID= "rbtnList "+num.ToString();
rbtnList.Items.Add( "A. "+Server.HtmlEncode(reader[ "testAns1 "].ToString()));
rbtnList.Items.Add( "B. "+Server.HtmlEncode(reader[ "testAns2 "].ToString()));
rbtnList.Items.Add( "C. "+Server.HtmlEncode(reader[ "testAns3 "].ToString()));
rbtnList.Items.Add( "D. "+Server.HtmlEncode(reader[ "testAns4 "].ToString()));
num++;
}


这样在Panel里建立的控件，
RadioButtonList list;
list = (RadioButtonList)Panel1.FindControl( "rbtnList " + i.ToString());

list为什么是Null

[解决办法]
RadioButtonList list;
list = (RadioButtonList)FindControl( "rbtnList " + i.ToString());

[解决办法]
这个问题，我在半年前也遇到过，后来改用FormView了．行．