从网格扩展中获取表单域答案

【问题标题】：FGetting a Form Field from a grid extension从网格扩展中获取表单域
【发布时间】：2018-04-18 01:00:38
【问题描述】：

我在“准备补货”表单中添加了一个字段，当用户在“补货项目”网格中选择一行时需要更新该字段。我如何访问该字段。我知道它在 INReplenishmentFilterExt 中，但我不知道如何访问扩展。

编辑 #1：我能够获取字段的值，但是当我使用 cache.SetValue 时它不会在屏幕上更新。我正在尝试从 Selected 事件处理程序内部更新此过滤器扩展字段。

protected void INReplenishmentItem_Selected_FieldUpdating(PXCache cache, PXFieldUpdatingEventArgs e)
{
    var row = (INReplenishmentItem)e.Row;
    if (row == null)
        return;
    INReplenishmentFilter filter = Base.Filter.Current;
    INReplenishmentFilterExt filterExt = PXCache<INReplenishmentFilter>.GetExtension<INReplenishmentFilterExt>(filter);

    decimal poAmount = filterExt.UsrPOAmount.HasValue ? filterExt.UsrPOAmount.Value : 0;
    decimal lastPrice = pvi.LastPrice.HasValue ? pvi.LastPrice.Value : 0;
    decimal newPOAmount = poAmount + lastPrice;

    cache.SetValue<INReplenishmentFilterExt.usrPOAmount>(filterExt, newPOAmount);
}

【问题讨论】：

标签： acumatica

【解决方案1】：

不能使用 INReplenishmentItem 的 Cache 来设置 Filter 的值。我已经编辑了我的答案，下面的代码应该可以工作。

//Always use virtual methods for Event Handlers
protected virtual void INReplenishmentItem_Selected_FieldUpdating(PXCache sender, PXFieldUpdatingEventArgs e)
{
    //Try not to use vars. Especially when you know the Type of the object
    INReplenishmentItem row = e.Row as INReplenishmentItem;

    if (row != null)
    {
        INReplenishmentFilter filter = Base.Filter.Current;
        INReplenishmentFilterExt filterExt = PXCache<INReplenishmentFilter>.GetExtension<INReplenishmentFilterExt>(filter);

        decimal poAmount = filterExt.UsrPOAmount ?? 0;
        decimal lastPrice = pvi.LastPrice ?? 0;//Not sure what pvi is
        decimal newPOAmount = poAmount + lastPrice;

        //"sender" is the cache that specifically stores the datatype of row
        //Therefor you cannot use it to update records of a different datatype
        //You also should not pass an Extension into the argument that should be the row object you are trying to update
        Base.Filter.Cache.SetValueExt<INReplenishmentFilterExt.usrPOAmount>(filter, newPOAmount);
    }
}

【讨论】：