二开案例.单据插件.单据体行删除后，保留过滤条件

单据体快速过滤后删除行会清空，可以在单据上注册表单插件，实现删除行后保留过滤条件。

using Kingdee.BOS.Core.DynamicForm.PlugIn;
using Kingdee.BOS.Core.DynamicForm.PlugIn.Args;
using Kingdee.BOS.Core.DynamicForm.PlugIn.ControlModel;
using Kingdee.BOS.JSON;
using Kingdee.BOS.Util;
using System.Collections.Generic;

namespace Test24.PlugIns.BL
{
    [Kingdee.BOS.Util.HotUpdate]
    public class KeepEntityFilterPlugIn : AbstractDynamicFormPlugIn
    {
        Dictionary<string, string> filterStrings = new Dictionary<string, string> { };

        public override void CustomEvents(CustomEventsArgs e)
        {
            if (e.EventName == "FilterChanged")
            {
                var dict = JsonUtil.DeserializeObject<Dictionary<string, object>>(e.EventArgs);
                var filterString = dict["FilterString"].ToString();
                filterStrings[e.Key.ToUpper()] = filterString;
            }
            else if (e.EventName == "RecoverFilterString")
            {
                EntryGrid grid = this.View.GetControl(e.Key.ToUpper()) as EntryGrid;
                var dict = JsonUtil.DeserializeObject<Dictionary<string, object>>(e.EventArgs);
                var filterString = dict["FilterString"].ToString();
                grid.SetFilterString(filterString);
            }
        }

        public override void AfterDeleteRow(AfterDeleteRowEventArgs e)
        {
            if (!filterStrings.ContainsKey(e.EntityKey.ToUpper())) return;
            var para = new JSONObject();
            para["key"] = e.EntityKey.ToUpper(); // 自定义事件标识
            para["eventName"] = "RecoverFilterString"; // 要触发的事件名称
            para["delay"] = "50"; // 延迟触发间隔(单位毫秒)
            var data = new JSONObject();
            data["FilterString"] = filterStrings[e.EntityKey.ToUpper()];
            para["data"] = data; // 自定义事件携带的数据包
            this.View.AddAction("fireCustomRequest", para);
        }

    }
}