**【应用场景】**
想要直接将附件列表中的最新字段(如创建时间)更新到单据上，方便进行查看。
**【案例演示】**
获取附件上传时间并更新到单据头上
<1>编写列表插件，代码如下。
``` csharp
using Kingdee.BOS.Core;
using Kingdee.BOS.Core.Attachment;
using Kingdee.BOS.Core.DynamicForm;
using Kingdee.BOS.Core.DynamicForm.PlugIn.Args;
using Kingdee.BOS.Core.List;
using Kingdee.BOS.Core.List.PlugIn;
using Kingdee.BOS.Core.Metadata.EntityElement;
using Kingdee.BOS.Core.Metadata.FieldElement;
using Kingdee.BOS.Orm.DataEntity;
using Kingdee.BOS.ServiceHelper;
using Kingdee.BOS.Util;
using System;
using System.Collections.Generic;
using System.ComponentModel;
namespace Kingdee.BOS.PlugInTest
{
/// <summary>
/// 【列表插件】自定义附件列表插件
/// </summary>
[Description("【列表插件】自定义附件列表插件"), HotUpdate]
public class CustomAttachmentListPlugIn : AbstractListPlugIn
{
/// <summary>
/// 页面准备关闭事件
/// </summary>
/// <param name="e">页面准备关闭参数</param>
public override void BeforeClosed(BeforeClosedEventArgs e)
{
base.BeforeClosed(e);
if (this.View == null || this.View.ParentFormView == null)
return;
if (this.Model == null)
return;
if ((this.View is IListView) == false)
return;
// 这里演示的是取附件明细列表第一条的创建时间，如果有另外的逻辑，要取列表外的数据，可以访问数据库附件表获取需要的值
string strCreateTime = string.Empty;
var listView = this.View as IListView;
var rowList = listView.CurrentPageRowsInfo;
if (rowList != null && rowList.Count > 0)
{
var firstRow = rowList[0];
DynamicObject rowData = (firstRow.DataRow as DynamicObjectDataRow).DynamicObject;
if (rowData != null && rowData.DynamicObjectType.Properties.ContainsKey("FCREATETIME"))
{
strCreateTime = rowData["FCREATETIME"].GetString();
}
}
AttachmentKey attachmentKey = GetAttachmentKey();
if (attachmentKey == null)
return;
IDynamicFormView relateBillView = View.ParentFormView;
UpdateAttachmentDate(relateBillView, attachmentKey, strCreateTime);
}
/// <summary>
/// 获取附件标识
/// </summary>
/// <returns></returns>
private AttachmentKey GetAttachmentKey()
{
AttachmentKey attachmentKey = null;
if (this.View.OpenParameter.GetCustomParameter(KeyConst.AttachmentKey) != null)
{
string json = this.View.OpenParameter.GetCustomParameter(KeyConst.AttachmentKey).ToString();
attachmentKey = AttachmentKey.ConvertFromString(json);
}
return attachmentKey;
}
/// <summary>
/// 更新附件数据
/// </summary>
/// <param name="relateBillView">关联的单据视图</param>
/// <param name="attachmentKey">附件标识</param>
/// <param name="strTime">需要展示的创建时间</param>
private void UpdateAttachmentDate(IDynamicFormView relateBillView, AttachmentKey attachmentKey, string strTime)
{
bool dataChanged = relateBillView.Model.DataChanged;
try
{
Field attachmentDateField = relateBillView.BillBusinessInfo.GetField("FAttachmentDate");
if (attachmentDateField == null)
return;
string billPkValue = string.Empty;
if (relateBillView is IListView)
{
//从列表中打开附件列表，单据ID则取操作传过来的ID
billPkValue = attachmentKey.BillInterID;
}
else
{
Entity entity = relateBillView.BillBusinessInfo.GetEntity(attachmentDateField.EntityKey);
if (entity == null || entity.DynamicObjectType == null || entity.DynamicObjectType.PrimaryKey == null)
return;
string pkValueId = entity.DynamicObjectType.PrimaryKey.Name;
billPkValue = relateBillView.Model.GetEntityDataObject(entity, attachmentKey.RowIndex)[pkValueId].ToString();
}
// 单据表格名称
string billTableName = attachmentDateField.TableName;
// 单据表格主键字段名称
string billPkFieldName = attachmentDateField.Entity.EntryPkFieldName;
// 字段名称
string attachmentDateFieldName = attachmentDateField.FieldName;
string sql = string.Format("update {0} set {1} = @date where {2} = @pkId", billTableName, attachmentDateFieldName, billPkFieldName);
List<SqlParam> sqlParams = new List<SqlParam>();
sqlParams.Add(new SqlParam("@date", KDDbType.DateTime2, string.IsNullOrWhiteSpace(strTime) ? null : strTime));
sqlParams.Add(new SqlParam("@pkId", KDDbType.String, billPkValue));
DBServiceHelper.Execute(this.View.Context, sql, sqlParams);
// 更新数据库成功后，更新界面值
if (relateBillView is IListView)
{
// 关联单据视图，则直接刷新
relateBillView.Refresh();
}
else
{
relateBillView.Model.SetValue(attachmentDateField.Key, strTime, attachmentKey.RowIndex);
// 保持单据原来的状态
relateBillView.Model.DataChanged = dataChanged;
}
}
catch (Exception)
{
throw;
}
}
}
}
```
<2>拷贝插件组件到应用站点的WebSite\Bin目录下，重启IIS。
<3>修改附件列表排序方式为按创建时间倒叙
<4>注册插件
<5>现在可以登业务站点，打开单据，上传附件，验证一下结果。
