点滴积累【C#】---当前菜单所在位置（导航栏）

private string thisPositionID = string.Empty;
public string ThisPositionID
{
get
{
if (Request.QueryString["ThisPositionID"] != null && Request.QueryString["ThisPositionID"] != string.Empty)
thisPositionID = Request.QueryString["ThisPositionID"];
return thisPositionID;
}
set
{
thisPositionID = value;
}
}

private string thisPosition = string.Empty;
public string ThisPosition
{
get
{
if (ThisPositionID != string.Empty)
{
string sql = string.Format(@"SELECT a.MenuName AS MenuNameA,b.MenuName AS MenuNameB,c.MenuName AS MenuNameC,c.MenuLevel AS MenuLevelC FROM MenuManagement a
INNER JOIN MenuManagement b ON a.ParentMenuID=b.MenuID
INNER JOIN MenuManagement c ON b.ParentMenuID=c.MenuID
WHERE a.MenuID={0}", ThisPositionID);
DataSet ds = new DataSet();
ERPDB.LoadDataSet(CommandType.Text, sql, ds, new string[] { "data" });
if (ds.Tables["data"].Rows.Count == 1)
{
DataRow row = ds.Tables["data"].Rows[0];
if (Convert.ToString(row["MenuLevelC"]) == "1")
{
thisPosition = string.Format("当前位置：{0}>>{1}", row["MenuNameB"], row["MenuNameA"]);
}
else if (Convert.ToString(row["MenuLevelC"]) == "2")
{
thisPosition = string.Format("当前位置：{0}>>{1}>>{2}", row["MenuNameC"], row["MenuNameB"], row["MenuNameA"]);
}
else if (Convert.ToString(row["MenuLevelC"]) == "3")
{
thisPosition = string.Format("当前位置：{0}>>{1}>>{2}", row["MenuNameC"], row["MenuNameB"], row["MenuNameA"]);
}
}

}
return thisPosition;
}
}

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
this.lbTip.Text = ThisPage.ThisPosition;
}
}