【案例演示】大文本字段修改详细信息后，如何回写到文本摘要

【实现步骤】

<1>编写动态表单插件，代码如下。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using Kingdee.BOS.Core.DynamicForm.PlugIn;
using Kingdee.BOS.Core.DynamicForm.PlugIn.Args;
using Kingdee.BOS.Util;
using Kingdee.BOS.Core.Metadata.FieldElement;
using Kingdee.BOS.Orm.DataEntity;
namespace Kingdee.DevBOSTest.Business.PlugIn
{
    [HotUpdate]
    [Description("大文本字段修改实时回写插件")]
    public class LargeTextSyncPlugIn:AbstractDynamicFormPlugIn
    {
        /// <summary>
        /// 大文本字段标示；据此去父页面读取/设置大文本详细信息数据流 
        /// </summary>
        private string _fieldKey = string.Empty;
        /// <summary>
        /// 参数名：本次编辑的父页面大文本字段标示
        /// </summary>
        private string _paraName_FieldKey = "FieldKey";
        public override void ButtonClick(ButtonClickEventArgs e)
        {
            base.ButtonClick(e);
            // 判断父页面是否存在
            if (this.View.ParentFormView == null)
                return;
            // 接收大文本字段标示
            var para = this.View.OpenParameter.GetCustomParameter(this._paraName_FieldKey);
            if (para != null)
            {
                this._fieldKey = para.ToString();
            }
            if (this._fieldKey.IsNullOrEmptyOrWhiteSpace())
                return;
            if (e.Key.EqualsIgnoreCase("FbtnOK"))
            {
                SetLargeTextValue(GetLargeTextValue());
            }
        }
        /// <summary>
        /// 从父界面Model大文本字段中，读取大文本详细内容并返回
        /// </summary>
        /// <returns></returns>
        private string GetLargeTextValue()
        {
            // 大文本字段
            Field field = this.View.ParentFormView.BillBusinessInfo.GetField(this._fieldKey);
            LargeTextField largeTextField = field as LargeTextField;
            if (largeTextField == null) return string.Empty;
            // 所在分录当前行号
            int row = this.View.ParentFormView.Model.GetEntryCurrentRowIndex(field.Entity.Key);
            // 当前行所在的动态模型数据包
            DynamicObject obj = this.View.ParentFormView.Model.GetEntityDataObject(field.Entity, row);
            if (obj == null) return string.Empty;
            byte[] streamValue = (byte[])largeTextField.TagDynamicProperty.GetValue(obj);
            return streamValue == null ? string.Empty : streamValue.GetUtf8String();
        }
        /// <summary>
        /// 给父界面Model大文本字段辅值
        /// </summary>
        /// <param name="value"></param>
        private void SetLargeTextValue(object value)
        {
            // 大文本字段
            Field field = this.View.ParentFormView.BillBusinessInfo.GetField(this._fieldKey);
            LargeTextField largeTextField = field as LargeTextField;
            if (largeTextField == null) return;
            // 所在分录当前行号
            int row = this.View.ParentFormView.Model.GetEntryCurrentRowIndex(field.Entity.Key);
            // 当前行所在的动态模型数据包
            DynamicObject obj = this.View.ParentFormView.Model.GetEntityDataObject(field.Entity, row);
            if (obj == null) return;
            largeTextField.DynamicProperty.SetValue(obj, value);
            this.View.ParentFormView.UpdateView(this._fieldKey, row);
            this.View.SendDynamicFormAction(this.View.ParentFormView);
        }
    }
}

<2>拷贝插件组件到应用站点的WebSite\Bin目录下，重启IIS。

<3>BOSIDE扩展大文本编辑BOS_LargeTextEdit，注册表单插件，保存元数据，开发完毕。