单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  Your application has a user control named UserCtrl.ascx. You write the following code fragment to create a Web page named Default.aspx.  You need to dynamically add the UserCtrl.ascx control between the lblHeader and lblFooter Label controls.  What should you do? （）

单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You create a Web form and add the following code fragment.  The SqlDataSource1 DataSource control retrieves the Quantity column values from a table named Products.  You write the following code segment to create the rptData_ItemDataBound event handler. (Line numbers are included for reference only.)  01 Protected Sub rptData_ItemDataBound(ByVal sender As Object, _  02 ByVal e As RepeaterItemEventArgs)  03  04 If lbl IsNot Nothing Then  05 If Integer.Parse(lbl.Text) < 10 Then  06 lbl.ForeColor = Color.Red 07 End If  08 End If  09 End Sub  You need to retrieve a reference to the lblQuantity Label control into a variable named lbl.  Which code segment should you insert at line 03?（）

单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You create a Web form and add the following code fragment.  The SqlDataSource1 DataSource control retrieves the Quantity column values from a table named Products.  You write the following code segment to create the rptData_ItemDataBound event handler. (Line numbers are included for reference only.)  01 protected void rptData_ItemDataBound(object sender,  02 RepeaterItemEventArgs e)  03 {  04  05 if(lbl != null)  06 if(int.Parse(lbl.Text) < 10)  07 lbl.ForeColor = Color.Red;  08 }  You need to retrieve a reference to the lblQuantity Label control into a variable named lbl. Which code segment should you insert at line 04?（）