Question

我使用以下代码设置数据源：

    protected void Page_Load(object sender, EventArgs e)
    {
        var vacancies = from v in db.Vacancies
                    join c in db.Customers on v.CustomerID equals c.CustomerID
                    join cp in db.CustomerPortals on c.CustomerID equals cp.CustomerID
                    where cp.PortalID == Master.Portal.ID
                    select new
                    {
                        Title = v.Title,
                        Internship = (v.ContractID == 6),
                        Hours = v.Hours,
                        City = v.Customer.City.Name,
                        Degree = v.Degree.Title,
                        Contract = v.Contract.Title,
                        CustomerID = v.CustomerID
                    };
        rVacancies.ItemDataBound += new RepeaterItemEventHandler(rVacancies_ItemDataBound);
        rVacancies.DataSource = vacancies;
        rVacancies.DataBind();
    }

现在我想知道如何从ItemDataBound事件中访问其中一列（如CustomerID）。

    void rVacancies_ItemDataBound(object sender, RepeaterItemEventArgs e)
    {
         // This doesnt seem to work, row would be null even though e.Item.DataItem has a value.
         DataRow row = (DataRow)e.Item.DataItem;
    }

我已经发现e.Item.DataItem包含我查询中的所有字段，而e.Item.DataItem的类型是

f__AnonymousType8<string,bool,byte,string,string,string,long>

Answer 1

终于找到它，就像下面这样简单：

long customerID = long.Parse(DataBinder.Eval(e.Item.DataItem, "CustomerID").ToString());

Answer 2

这种.Net 4.0方法确实非常酷！

public void PersonDataBound(object sender, RepeaterItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
        dynamic person = e.Item.DataItem as dynamic;

        string name = person.Name;
        int age = person.Age;
    }
}

所有信用： http://www.kristofclaes.be/blog/2010/08/12/anonymous-types-and-the-itemdatabound-event/

因为页面现在显示错误404，所以这里是Wayback Machine的页面： Anonymous types and the ItemDataBound event (Archived version)

Answer 3

您没有将数据行绑定到您的控件（您正在绑定匿名类型），因此您不应将DataItem强制转换为DataRow。

尝试将行的数据设为：

var dataItem = e.Item.DataItem;
// For example get your CustomerID as you defined at your anonymous type :
string customerId = dataItem.CustomerID;

当数据源为Linq时，访问ItemDataBound事件中的列

3 个答案: