DropDownList显示默认数据库值
问题如标题
T_DegreelevelControl.ascx里的代码如下

protected void Page_Load(object sender, EventArgs e)
{

}

override protected void OnInit(EventArgs e)
{
Bind();
}

protected void Bind()
{
TeacherBLL DlevelA = new TeacherBLL();
DropDownList1.DataSource =DlevelA.SelectAllDlevel();
DropDownList1.DataValueField = "Dl_DlevelID";
DropDownList1.DataTextField = "Dl_DlevelName";
DropDownList1.DataBind();
}

public String Text
{
get
{
this.EnsureChildControls();
return (DropDownList1.SelectedItem.Text);
}
set
{
this.EnsureChildControls();
DropDownList1.SelectedItem.Text = value;
}
}
}


在前台写了
<%@ Register src="Control/T_DegreelevelControl.ascx" tagname="T_DegreelevelControl" tagprefix="uc5" %>
<td class="tableleft2">学历层次:</td>
<td class="tableleft2"><uc5:T_DegreelevelControl ID="T_DegreelevelControl2" runat="server" /></td>


后台代码
this.T_DegreelevelControl2.Text = Convert.ToString(ds.Tables[0].Rows[0]["T_Edegreelevel"]);

但这样显示出来的是DropDownList的第一项

请问该怎么修改才能显示默认数据库的值

[解决办法]
DropDownList1.SelectedIndex = "默认值Dl_DlevelID的值"
[解决办法]
修改selectindext值
[解决办法]
什么算是默认数据库的值啊？
[解决办法]
this.T_DegreelevelControl2.Items.FindByText(Convert.ToString(ds.Tables[0].Rows[0]["T_Edegreelevel"])).Selected = true;