动软——dropdownlist联动

        protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {

                DataSet ds1 = new BLL.Department_Info().GetAllList();

                this.ddl_post.DataSource = ds1;

                ddl_post.DataTextField = "departmentName";

                ddl_post.DataValueField = "departmentName";

                this.ddl_post.DataBind();

                ////这种方法也可以

                this.ddl_post.Items.Insert(0, "==请选择==");

                this.ddl_post.Items.FindByText("==请选择==").Selected = true;



                DataSet ds = new BLL.J_Staff_Info.J_Staff_Info().GetList("state = '在职'");

                this.ddl_EName.DataSource = ds;

                ddl_EName.DataTextField = "EName";

                ddl_EName.DataValueField = "EName";

                this.ddl_EName.DataBind();

            }



        }

 

 

selectedIndexChanged事件

        protected void ddl_post_SelectedIndexChanged(object sender, EventArgs e)

        {

            DataSet ds = new BLL.J_Staff_Info.J_Staff_Info().GetList("post='" + ddl_post.SelectedValue + "' and state = '在职';");

            this.ddl_EName.DataSource = ds;

            ddl_EName.DataTextField = "EName";

            ddl_EName.DataValueField = "EName";

            this.ddl_EName.DataBind();



        }