二开客户对账单添加新字段

客户对账单是一个动态表单，现在想要在这个表单上新增一个自定义字段如何实现？
实现方式：扩展客户对账单表单插件，并且要取消标准客户对账单表单插件的引用，使用我们新扩展的这个插件，在这个插件中实现对临时表新增自定义字段，并在BOS单据上新增这个字段即可。代码实现如下：[code][Description("客户对账单扩展插件")]
[Kingdee.BOS.Util.HotUpdate]
public class StatementExtend: Kingdee.K3.FIN.Business.PlugIn.ARAP.Statement
{
string customerName = ""; //过滤条件往来单位
string newtempTable = ""; //新的临时表
bool NewSearch = false; //是否是新查询的数据

public override void BarItemClick(BarItemClickEventArgs e)
{
if(e.BarItemKey== "tbFilter")
{
this.customerName = "";
NewSearch = true;
}
if(e.BarItemKey== "tbRefresh")
{
NewSearch = true;
}
base.BarItemClick(e);
}

public override void DataChanged(DataChangedEventArgs e)
{
if(e.Field.Key== "FCombo")
{
NewSearch = false;
}
base.DataChanged(e);
}

protected override void Refresh()
{
if (this.filterPara == null)
{
return;
}
string oldSelectedValue = Convert.ToString(this.View.Model.GetValue("FCombo"));
if (Convert.ToBoolean(this.filterPara.CustomFilter["FByContact"]))
{
customerName = this.GetCustomerData(oldSelectedValue);
}
dropTempTable();
base.Refresh();
}

public override void BeforeClosed(BeforeClosedEventArgs e)
{
dropTempTable();
base.BeforeClosed(e);
}

///

/// 将标准的对账单生成的临时表数据复制到带有扩展字段的临时表里面去
///

public void CopyDataToNewTempTable()
{
this.newtempTable = GetTempTable();
string sql = string.Format("select t1.*,t2.F_PAEZ_KHDDH,t2.F_PAEZ_XSDDH,t2.F_PAEZ_PN,t2.F_PAEZ_YSDDKFP into {1} from {0} t1 left join t_AR_receivable t2 on t1.FID=t2.FID and t1.FFORMID='AR_receivable'", this.tempTable,this.newtempTable);
DBUtils.Execute(this.Context, sql);
}

///

/// 获取新的带有扩展字段的数据
///

///
public DataTable GetNewData()
{
CopyDataToNewTempTable();
DataTable dataByContactUnit = StatementServiceHelper.GetDataByContactUnit(base.Context, this.newtempTable, customerName);
return dataByContactUnit;
}

///

/// 获取新的带扩展字段的汇总数据
///

///
public DataTable GetNewSumDate()
{
DataTable sumDataByContactUnit = StatementServiceHelper.GetSumDataByContactUnit(base.Context, this.newtempTable, this.agingKeys.Keys.ToList(), customerName);
return sumDataByContactUnit;
}

public override void SetListData(DataTable data)
{
if (NewSearch)
{
DataTable dt = GetNewData();
string oldTempTable = this.tempTable;
this.tempTable = this.newtempTable;
this.newtempTable = oldTempTable;
base.SetListData(dt);
}
else
{
base.SetListData(data);
}
}

public override void SetListSumData(DataTable data)
{
if (NewSearch)
{
DataTable dt = GetNewSumDate();
base.SetListSumData(dt);
}
else
{
base.SetListSumData(data);
}
}

///

/// 删除临时表
///

private void dropTempTable()
{
if (!string.IsNullOrWhiteSpace(this.newtempTable))
{
IDBService dbservice = Kingdee.BOS.App.ServiceHelper.GetService();
dbservice.DeleteTemporaryTableName(this.Context, new string[] { this.newtempTable });
this.newtempTable = "";
}
}

///

/// 获取临时表名称
///

///
private string GetTempTable()
{
IDBService dbservice = Kingdee.BOS.App.ServiceHelper.GetService();
string[] temptables = dbservice.CreateTemporaryTableName(this.Context, 1);
return temptables[0];
}
}[/code]