在页面加载时在树视图中选择值

Question

private void Edit_Data(long ITEM)
{
    WebCrmService.Service du = new WebCrmService.Service();

    string[] parameters = new string[1] {"@ID " };
    string[] dbtype = new string[1] { "bigint" };
    string[] type = new string[1] { "input" };
    object[] value = new object[1] { long.Parse(Request.QueryString["EditItem_id"]) };
    string[] length = new string[1] { "20" };

    DataSet ds = new DataSet();

    ds = du.returnDataSet("proc", "Edit_Fuel_Entry_Detail", parameters, dbtype, type, value, length);
    if (ds.Tables[0].Rows.Count > 0)
    {
        Tank_Capacity.Text                  = ds.Tables[0].Rows[0]["TANK_CAPACITY"].ToString();
        Tank_Length.Text                    = ds.Tables[0].Rows[0]["TANK_LENGTH"].ToString();
        Tank_Diameter.Text                  = ds.Tables[0].Rows[0]["TANK_DIAMETER"].ToString();
        Min_Reading.Text                    = ds.Tables[0].Rows[0]["MIN_READING"].ToString();
        Max_Reading.Text                    = ds.Tables[0].Rows[0]["MAX_READING"].ToString();
        txt_ENTRY_DATE.Text                 = ds.Tables[0].Rows[0]["ENTRY_DATE"].ToString();
        ddl_Zone.SelectedValue              = ds.Tables[0].Rows[0]["Zone_ID"].ToString();
        ddl_Asset.SelectedValue             = ds.Tables[0].Rows[0]["V_ID"].ToString();
        **int iValue                          = Convert.ToInt32( ds.Tables[0].Rows[0["COMPANY_ID"].ToString());
        tvDepartment.Nodes[iValue].Selected = true;**


    }
}

我用它来通过网格EDIT按钮更新记录，我想选择公司所选择的索引更改公司的树节点我选择其他项目，如何从树视图中选择页面加载节点