用循环如何提取多个控件的内容
protected   System.Web.UI.WebControls.DropDownList   DDL1;
protected   System.Web.UI.WebControls.DropDownList   DDL2;
protected   System.Web.UI.WebControls.DropDownList   DDL3;
protected   System.Web.UI.WebControls.DropDownList   DDL4;
protected   System.Web.UI.WebControls.DropDownList   DDL5;
protected   System.Web.UI.WebControls.DropDownList   DDL6;
protected   System.Web.UI.WebControls.DropDownList   DDL7;
protected   System.Web.UI.WebControls.DropDownList   DDL8;
protected   System.Web.UI.WebControls.DropDownList   DDL9;
protected   System.Web.UI.WebControls.DropDownList   DDLcomm1;
protected   System.Web.UI.WebControls.DropDownList   DDLcomm2;
protected   System.Web.UI.WebControls.DropDownList   DDLcomm3;
protected   System.Web.UI.WebControls.DropDownList   DDLcomm4;
protected   System.Web.UI.WebControls.DropDownList   DDLcomm5;
protected   System.Web.UI.WebControls.DropDownList   DDLcomm6;
protected   System.Web.UI.WebControls.DropDownList   DDLcomm7;
protected   System.Web.UI.WebControls.DropDownList   DDLcomm8;
protected   System.Web.UI.WebControls.DropDownList   DDLcomm9;


提取DropDownList里的内容

for   (i=1;i <=9;i++)
{
s[i]   =   this.DDL+i.SelectedValue;
                  t[i]   =   this.DDcommL+i.SelectedValue;
}
该怎么取值，谢谢！

------解决方案--------------------
for (i=1;i <=9;i++)
{
s[i] = ((DropDownList)this.FindControl( "DDL " + i.ToString())).SelectedValue;
t[i] = ((DropDownList)this.FindControl( "DDLcomm " + i.ToString())).SelectedValue;
}