protected void btnSearch_Click(object sender, EventArgs e)
    {
        lblSelectedICD.Text = "";
        int gender = 0;
        Guid eventid = new Guid(Request.QueryString["DeadEventID"].ToString());
        Dead dead = new Dead();
        dead.LoadByPrimaryKey(eventid);
        if (dead.DeadGender == 1)
            gender = 2;
        else
            gender = 1;
        //ICDCODE9000 objICD = new ICDCODE9000();
        ICD10_MainDeathReason objICD = new ICD10_MainDeathReason();
        if (txtSearch.Text != "")
        {
            DataTable dt = objICD.FilterICDcodes(txtSearch.Text.Trim(), gender);

            if (dt.Rows.Count > 0)
            {
                dropItem.DataSource = dt.DefaultView;
                //dropItem.DataTextField = ICDCODE9000.ColumnNames.DESCRENG;
                //dropItem.DataValueField = ICDCODE9000.ColumnNames.CODE;
                dropItem.DataTextField = ICD10_MainDeathReason.ColumnNames.Causename;
                dropItem.DataValueField = ICD10_MainDeathReason.ColumnNames.Code;
                dropItem.DataBind();

                ListItem item = new ListItem(" ", "0");
                dropItem.Items.Insert(0, item);
                dropItem.SelectedIndex = 0;
            }
            else
            {
                dropItem.Items.Clear();
                dropItem.DataSource = null;
                dropItem.DataBind();
            }
        }
        else
        {
            dropItem.Items.Clear();
            dropItem.DataSource = null;
            dropItem.DataBind();
        }
    }