二开案例.单据头超链接显示附件数，点击打开附件列表

1、在单据上增加附件数和超链接字段，ID分别是F_UNW_AttachmentCount_qtr、F_UNW_Link_83g

2、插件代码：

using Kingdee.BOS.Core;
using Kingdee.BOS.Core.Attachment;
using Kingdee.BOS.Core.Bill.PlugIn;
using Kingdee.BOS.Core.DynamicForm;
using Kingdee.BOS.Core.DynamicForm.PlugIn.Args;
using Kingdee.BOS.Core.List;
using Kingdee.BOS.Core.Metadata;
using Kingdee.BOS.Resource;
using Kingdee.BOS.ServiceHelper;
using Kingdee.BOS.Util;
using System;

namespace Test202411
{
    [Kingdee.BOS.Util.HotUpdate]
    public class 附件数超链接 : AbstractBillPlugIn
    {
        public override void AfterBindData(EventArgs e)
        {
            UpdataAttachementLinkText();
        }

        public override void DataChanged(DataChangedEventArgs e)
        {
            if (e.Key.EqualsIgnoreCase("F_UNW_AttachmentCount_qtr"))
            {
                UpdataAttachementLinkText();
            }
        }

        void UpdataAttachementLinkText()
        {
            var link = this.View.GetControl("F_UNW_Link_83g");
            var attachmentCount = this.Model.GetValue("F_UNW_AttachmentCount_qtr");
            link.SetCustomPropertyValue("Text", string.Format("附件数：{0}", attachmentCount));
        }

        public override void ButtonClick(ButtonClickEventArgs e)
        {
            if (e.Key.EqualsIgnoreCase("F_UNW_Link_83g"))
            {
                //调用附件管理操作
                this.View.InvokeFormOperation("AttachmentMgr");
                return;

                //或使用下面的代码，自行弹出附件列表
                var view = this.View;
                var billNoField = view.BillBusinessInfo.GetBillNoField();
                AttachmentKey attachmentKey = new AttachmentKey()
                {
                    BillType = view.BusinessInfo.GetForm().Id,
                    BillNo = (view.Model.DataObject[billNoField.PropertyName] ?? "").ToString(),
                    BillInterID = this.View.Model.GetPKValue().ToString(),
                    EntryKey = null,
                    EntryInterID = "-1",
                    OperationStatus = OperationStatus.EDIT,
                    ForceEnableAttachOperate = true
                };
                string filter = BusinessDataServiceHelper.GetAttachmentListFilter(view.Context, attachmentKey, view.BillBusinessInfo);
                ListShowParameter listpara = new ListShowParameter();
                listpara.IsLookUp = false;
                listpara.CustomParams.Add(KeyConst.AttachmentKey, AttachmentKey.ConvertToString(attachmentKey));
                listpara.Caption = ResManager.LoadKDString("附件管理", "002012030003226", SubSystemType.BOS);
                listpara.FormId = FormIdConst.BOS_Attachment;
                listpara.MultiSelect = true;
                listpara.ListFilterParameter.Filter = filter;
                listpara.IsShowQuickFilter = false;
                view.ShowForm(listpara, delegate (FormResult result)
                {
                    foreach (string key in attachmentKey.AttachmentCountFieldKeys)
                    {
                        view.UpdateView(key, attachmentKey.RowIndex);
                    }
                });

            }
        }

    }
}

3、实现效果：点击超链接，打开附件列表（附件数字段可设置为隐藏，只显示超链接）