DropDownList应用

这两天我用了dropdownlist这个控件，一开始真的什么都不懂。

#region 初始化选择框
        private void BindData()
        {
            
            this.DropDownList_STANDARD_TYPE.Items.Clear();
            DataSet standard_type = dal.STANDARD_TYPE_MANAGE_LIST();

            this.DropDownList_STANDARD_TYPE.DataSource = standard_type.Tables[0].DefaultView;
            this.DropDownList_STANDARD_TYPE.DataTextField = "STANDARD_TYPE_NAME";
            this.DropDownList_STANDARD_TYPE.DataValueField = "STANDARD_TYPE_ID";
            this.DropDownList_STANDARD_TYPE.DataBind();
            //this.DropDownList_STANDARD_TYPE.Items.Insert(0, new ListItem("请选择", "")); 

            
            //this.STANDARD_TYPE.SelectedItem.Value = standard_type.Tables[0].Rows[0]["STANDARD_TYPE_NAME"].ToString();
           
            

        }
        #endregion