I am getting exception :
System.InvalidOperationException: The ConnectionString property has not been initialized.
I am using BLL to work on.




 dbcon objDbCon=new dbcon();
            DataSet ds=new DataSet();
            string sql;

            if (ViewState["sortfield"]!=null)
                sql="select * from [product details] where category_id=" + catid + " order by " + ViewState["sortfield"].ToString();
            else
                sql="select * from [product details] where category_id=" + catid;
            objDbCon.getData(sql, ref ds,"[product details]"); objDbCon.dispose();
            objDbCon=null;
            if (ds.Tables["[product details]"].Rows.Count>0)
            {
                grdItemlist.DataSource=ds;
                grdItemlist.DataMember="[product details]";
                grdItemlist.PageSize=5;
                grdItemlist.DataBind();
            }
            else
            {
                Errmsg.Text="No items in this category";

            }

The: The ConnectionString property has not been initialized. error means that you are providing a blank connection string to your connection object or that you are not providing one at all.


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