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如何将匿名类型强制转换为指定的强制转换以获取其所有属性

anonymous-types delegates generics linq c#

Shantanu Gupta · 技术社区 · 15 年前

_ucItem.lblItemName.Text = itemRow.Field<string>("ITEM_NAME").ToString();
_ucItem.pbxItemImg.Image = itemRow.Field<string>("IMAGE").ToString();
_ucItem.lblItemName.Text = itemRow.Field<string>("FK_ITEM_ID").ToString();

我是否必须声明一个类来完成这项工作,或者是否有某种方法可以在不定义类结构的情况下完成相同的工作

private void SomeFunction()
{
   var distinctItems = itemListToCreate
            .Select(dr => new { FK_ITEM_ID = dr.Field<long>("FK_ITEM_ID") }).Distinct()
            .Join(_SelectProgram.FilteredItemDescription, outer => outer.FK_ITEM_ID,
            inner => inner.Field<long>("FK_ITEM_ID"),
            (inner, outer) => new 
                              { 
                                  inner.FK_ITEM_ID,
                                  ItemName = outer.Field<string>("ITEM_NAME"),
                                  ItemImage = outer.Field<byte[]>("IMAGE") 
                              }
            );

    CreateItemsDynamically(distinctItems.ToList());
}

private void CreateItemsDynamically<T>(List<T> itemListToCreate)
{
    itemListToCreate.ForEach(itemRow =>
    {                
        ucItem _ucItem = new ucItem();
        //Compute location for this usercontrol              

        _ucItem.lblItemName.Text = itemRow.Field<string>("ITEM_NAME").ToString();
        _ucItem.pbxItemImg.Image = itemRow.Field<string>("IMAGE").ToString();
        _ucItem.lblItemName.Text = itemRow.Field<string>("FK_ITEM_ID").ToString();

        _ucItem.TodayButton_OnClick += new EventHandler(_ucItem_TodayButton_OnClick);
        _ucItem.MultiDateButton_OnClick += new EventHandler(_ucItem_MultiDateButton_OnClick);

        pnlItemCollection.Controls.Add(_ucItem);
        _SelectProgram.ItemCollectionList.Add(_ucItem);
    });
}