使用Eval从通用列表创建逗号分隔字符串

Question

I have a Report class. The reports data is rendered using a repeater control. There is a department list (generic list of string) to be displayed as comma separated. Can we make it as a comma separated list in the repeater using Eval? If we cannot use Eval, is there any other syntax for this in repeater?

Class

 public class Report
{
    public int ReportID { get; set; }
    public string Title { get; set; }
    public string Recipients { get; set; }
    public string Frequency { get; set; }
    public List<string> DepartmentList { get; set; }

}

ASP.NET Markup

<asp:Repeater ID="rptReports" runat="server">
                    <HeaderTemplate>
                        <div>
                        </div>
                    </HeaderTemplate>
                    <ItemTemplate>
                        <div class="repeaterIdentifier">
                            <div class="reportTitle">
                                <%# Eval("Title") +":" %>
                            </div>
                            <div class="reportFrequency">
                                <%# " Frequency - "+ Eval("Frequency") %>
                            </div>
                        </div>
                        <div class="reportContent">
                            <div class="repeaterLine">
                                <%# Eval("Recipients")%></div>
                        </div>
                    </ItemTemplate>
                </asp:Repeater>

Answer 1

您可以使用

<%#String.Join(",",((Report)Container.DataItem).DepartmentList)%>

Answer 2

Try this

<ItemTemplate>
   <%# String.Join((List<string>)Eval("DepartmentList")).ToArray()) %>
</ItemTemplate>

Note: code not tested

Answer 3

In your class Report , you may want to add an extra property

public string DepartmentListCommas
{
  get
  {
     return string.Join(", ", DepartmentList);
  }
}