选单列表默认过滤单据体

bos设计器中，选单列表默认过滤单据体，代码怎么实现？
ListSelBillShowParameter showParameter = new ListSelBillShowParameter();
showParameter.FormId = "DE_MDYGSPXLFA";
showParameter.OpenStyle.ShowType = ShowType.Floating;
//showParameter.PageId = Guid.NewGuid().ToString();
showParameter.ParentPageId = this.View.PageId;
showParameter.IsLookUp = true;
showParameter.MultiSelect = true;
showParameter.IsShowUsed = true;
showParameter.PageId = Guid.NewGuid().ToString();
showParameter.IsShowApproved = false;
showParameter.IsIsolationOrg = false;
//showParameter.ListType = 3;
//string hiddenMnus = "tbSplitNew,tbDelete";
//showParameter.CustomParams.Add("HiddenMnus", hiddenMnus);
this.View.ShowForm