protected void ddlSkillType_SelectedIndexChanged(object sender, EventArgs e)
        {
            string    ActivityID = DetailsView1.DataKey.Value.ToString();
            string    Skill1     = "SI_Name,ST_NAME, Skill_Name, VolunteerSkills.V_ID,V_Name, V_LastName,V_MobileNo1, V_MobileNo2,V_Email FROM Volunteer, VolunteerSkills,SkillItems,SkillTypes,Skills WHERE VolunteerSkills.SI_ID = " + ddlSkill.SelectedValue + " AND VolunteerSkills.V_ID = Volunteer.V_ID AND VolunteerSkills.SI_ID = SkillItems.SI_ID AND SkillItems.Skill_ID = Skills.Skill_ID AND Skills.ST_ID = SkillTypes.ST_ID AND VolunteerSkills.V_ID NOT IN (SELECT VolunteerJoinActivities.V_ID FROM VolunteerJoinActivities WHERE Activity_ID = " + ActivityID + ");";
            DataTable dtSkill1   = dbconn.QueryExecuteScalar(Skill1);

            GridViewSkill1.DataSource = dtSkill1;
            GridViewSkill1.DataBind();
            dbconn.Close();
            lblSkill1.Text = GridViewSkill1.Rows.Count.ToString();
        }
        protected void SaveSkill2_Click(object sender, EventArgs e)
        {
            CheckBox chkbox = new CheckBox();

            foreach (GridViewRow grdRow in GridViewSkill1.Rows)
            {
                chkbox = (CheckBox)Convert.ChangeType(((CheckBox)grdRow.FindControl("chk")), typeof(CheckBox));
                if (chkbox.Checked)
                {
                    string keyID = (string)GridViewSkill1.DataKeys[grdRow.RowIndex].Value.ToString();
                    string sqlSelectVolunteer = "Insert into VolunteerJoinActivities(V_ID,VJA_Status,Activity_ID) Values (" + keyID + ",'Selected'," + DetailsView1.SelectedValue + ") ;";
                    dbconn.QueryExecuteScalar(sqlSelectVolunteer);
                }
            }
            dbconn.Close();
            GridViewSkill1.DataBind();
        }