Web页面数据库

先上一段代码，高手看看，为什么Web页面连接 不到数据库。fanghuojianhujilurizhi是我的数据库的名字。DataGV是gridview控件的ID.namespace ElectLock.Manage
{
    public partial class fanghuojianhujilurizhi（数据库的名字） : System.Web.UI.Page
    {        protected void Page_Load(object sender, EventArgs e)
        {
            try
            {
                //if (!IsPostBack)
                {
                    ViewState["WhereString"] = "";
                    try
                    {
                        string sWhereStr=Request.QueryString["WhereString"].ToString();
                        ViewState["WhereString"] = sWhereStr;// Server.UrlDecode(sWhereStr);
                    }
                    catch { }
                    try
                    {
                        int iPageIndex = 0;
                        string sPageindex = Request.QueryString["PageIndex"].ToString();
                        iPageIndex = Convert.ToInt32(sPageindex);
                        DataGV.PageIndex = iPageIndex;
 
                    
                    }
                    catch { }                    GridDataBind("", ViewState["WhereString"].ToString(),0);                }
            }
            catch
            {            }
        }
private void GridDataBind( string SortString,string sWhereString,int mode )
        {            string DeptID = "";
            string WhereString = "";
            try
            {
                DeptID = Session["DEPTID"].ToString();
            }
            catch { }            try
            {
                DeptID = this.Request.QueryString["DEPTID"];
            }
            catch { }
            try
            {
                WhereString = this.Request.QueryString["WhereString"];
            }
            catch { }            try
            {                //string SELECT_SQL = "  SELECT *" +                //                         "  FROM   fanghuojianhujilurizhi a " +                //                        "  WHERE   (a.DEPTID like '" + DeptID + "%' or a.DEPTID is null )  " + ViewState["WhereString"].ToString() + SortString;                string SELECT_SQL = "  SELECT *" +                                           "  FROM   fanghuojianhujilurizhi a" + ViewState["WhereString"].ToString() + SortString;
                
                //对要绑定到gridview的表数据进行排序                DataSet ds = DBSQLServer.Query(SELECT_SQL);
                DataTable sdt = ds.Tables[0];
                DataView dv = sdt.DefaultView;
                if (SortString == "") dv.Sort = "id desc";                DataGV.DataKeyNames = new string[] {"danwei"};
                if (sdt.Rows.Count == 0)
                {
                    sdt.Rows.Add(sdt.NewRow());
                    DataGV.DataSource = sdt;
                    DataGV.DataBind();
                    int columnCount = sdt.Columns.Count;
                    DataGV.Rows[0].Cells.Clear();
                    DataGV.Rows[0].Cells.Add(new TableCell());
                    DataGV.Rows[0].Cells[0].ColumnSpan = columnCount;
                    DataGV.Rows[0].Cells[0].Text = "该表没有数据";
                    DataGV.Rows[0].Cells[0].Style.Add("text-align", "center");
                    DataGV.RowStyle.HorizontalAlign = System.Web.UI.WebControls.HorizontalAlign.Center;
                    lbDataCount.Text = "0";                }
                else
                {
                    if(mode==1)
                    DataGV.PageSize = sdt.Rows.Count;
                    lbDataCount.Text = sdt.Rows.Count.ToString();                    DataGV.DataSource = sdt;
                    DataGV.DataBind();
                }                lbCurrPage.Text = (DataGV.PageIndex+1).ToString();
                lbPageCount.Text = DataGV.PageCount.ToString();            }
            catch(Exception err)
            {                this.Response.Write("<script language=javascript>alert('"+err.ToString()+"');</script>");
            }        }        private string GetDataIdFromGridView( )
        {
            int icount = 0;
            string id="" ;
            for (int i = 0; i < DataGV.Rows.Count; i++)
            { 
                CheckBox chkbox=(CheckBox)DataGV.Rows[i].Cells[0].FindControl("CheckSelect");
                if (chkbox.Checked == true)
                {
                    icount += 1;
                    id = DataGV.DataKeys[i].Value.ToString();                }
            }