单据类型跟下拉列表字段的联动二开示例，已采购申请单为例：当采购申请单的单据类型为标准采购申请时，不显示下拉列表中枚举值为3的枚举列。

此示例参考二开案例.表单插件.下拉列表动态绑定枚举类型：https://vip.kingdee.com/article/137494654802820864

表单插件代码如下所示：

using Kingdee.BOS.Core.Bill.PlugIn;
using Kingdee.BOS.Core.DynamicForm.PlugIn.ControlModel;
using Kingdee.BOS.Core.Metadata;
using Kingdee.BOS.Orm.DataEntity;
using Kingdee.BOS.ServiceHelper;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Kingdee.BOS.Printing.PlugIn.Test
{
    public class CMBPlugIn : AbstractBillPlugIn
    {
        public CMBPlugIn()
        { }
        public override void DataChanged(Core.DynamicForm.PlugIn.Args.DataChangedEventArgs e)
        {
            base.DataChanged(e);
            if (e.Field.Key == "FBillTypeID")
            {
               BindComboField();
            }
        }

        public override void AfterBindData(EventArgs e)
        {
            base.AfterBindData(e);
            BindComboField();
        }
        private void BindComboField()
        {
            var obj = this.View.Model.GetValue("FBillTypeID");
            if (obj != null && (obj as DynamicObject)!=null)
            {
                string typeName = Convert.ToString(((DynamicObject)obj)["Name"]);
                if (typeName == "标准采购申请")//如果是标准采购申请，则去掉枚举值为3的发货状态
                {
                    var enumList = GetEnumItems(this.Context);
                    var comboList = this.View.GetFieldEditor<ComboFieldEditor>("F_TYJ_Combo", 0);
                    if (comboList != null)
                    {
                        enumList = enumList.Where(p => p.Value != "3").ToList();
                        comboList.SetComboItems(enumList);
                    }
                }
            }
        }

        private List<EnumItem> GetEnumItems(Context ctx)
        { 
            // 获取枚举类型【发货状态】的枚举项明细 
            var objs = BusinessDataServiceHelper.LoadFromCache(ctx, new object[] { "0113bd8e-03b1-4c47-8fb4-9ed5b9074680" }, EnumObject.EnumObjectType);
            var enumList = new List<EnumItem>();
            if (objs != null && objs.Length > 0)
            {
                var enumItems = (DynamicObjectCollection)objs[0]["Items"]; enumList.AddRange(enumItems.Select(o => (EnumItem)o));
            }
            return enumList;
        }
    }
}