I am getting this Exception:
System.InvalidOperationException: The ConnectionString property has not been initialized.


code:
private void bindData()
        {

            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";

            }

        }

What is your question? Obviously you are not setting the connection string in your object. Since you did not post the releveant code, we can't help you. Check your dbcon object.

Cross post. Source thread: http://p2p.wrox.com/topic.asp?TOPIC_ID=56367

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Discussion:
http://p2p.wrox.com/topic.asp?TOPIC_ID=56429