2

使用中继器，我遍历“SelectedUtility”表并输出匹配的位置。这可以正常工作，但是它会显示“Utility_Id”，它是实用程序表中“id”的外键。

我实际上想在实用程序表中显示“名称”列。我该怎么做...类似于<th style="width:200px;"><%# Eval("Utility_Id.name") %></th>
或是否在后面的代码中完成...感谢您的任何回复

aspx： 

 <asp:Repeater id="rptSelectedUtilities" runat="server">
                <HeaderTemplate>
                    <table class="detailstable FadeOutOnEdit">
                        <tr>   
                            <th style="width:200px;">Utility</th>    
                        </tr>
                </HeaderTemplate>
                <ItemTemplate>
                        <tr>
                            <th style="width:200px;"><%# Eval("Utility_Id") %></th> 
                        </tr>
                </ItemTemplate>
                <FooterTemplate>
                    </table>
                </FooterTemplate>
            </asp:Repeater>

后面的代码：

DBData db = new DBDatat();
        List<Select_Utility> SelectedUtility = 
            (from SU in db.Select_Utilities
             where SU.Work_Id == 3
             select SU).ToList();

        rptSelectedUtilities.DataSource = SelectedUtility;

rptSelectedUtilities.DataBind();

编辑：

   DBData db = new DBDatat();
    List<Utility_Company> Utility = new List<Utility_Company>();
    List<Select_Utility> SelectedUtility = 
        (from SU in db.Select_Utilities
         join UTL in Utility on SU equals UTL.id
         where SU.Worksite_Id == 3
         select SU).ToList();

    rptSelectedUtilities.DataSource = SelectedUtility;
    rptSelectedUtilities.DataBind();

抛出错误“连接子句中的表达式之一的类型不正确。调用“加入”时类型推断失败

//应该加入名字..so join UTL in Utility on SU等于UTL.Name //而不是UTL.id

还尝试在 SU 上的 db.Utility_Companies 中加入 UTL 等于 UTL.id ...但同样的错误

第二次编辑：<%# Eval("Name") %> 抛出错误：DataBinding: 'Select_Utility' 不包含名为 'Name' 的属性。

     DBData db = new DBData();

        List<Select_Utility> SelectedUtility = 
            (from SU in db.Select_Utilities
             where SU.Worksite_Id == 3
             select SU).ToList();

        rptSelectedUtilities.DataSource = SelectedUtility;
        rptSelectedUtilities.DataBind();


   List<Utility_Company> Utility = new List<Utility_Company>();
        var query = from u in db.Utility_Companies
                    join su in db.Select_Utilities
                         on u.id equals su.Utility_Id
                    where su.Worksite_Id == 3
                    select u;

        rptSelectedUtilities.DataSource = query.ToList();
        rptSelectedUtilities.DataBind();
4

2 回答 2

1

查询（您应该选择加入的实用程序）：

DBData db = new DBDatat();
var query = from u in db.Utility
            join su in db.Select_Utilities
                 on u.Id equals su.Utility_Id
            where su.Work_Id == 3
            select u;

rptSelectedUtilities.DataSource = query.ToList();
rptSelectedUtilities.DataBind();

页面（实用程序的显示名称）：

<th style="width:200px;"><%# Eval("Name") %></th>
于 2013-03-06T11:25:35.517 回答
1

使用内部连接外部表。并选择该 id 。

DBData db = new DBDatat();
        List<Select_Utility> SelectedUtility = 
            (from SU in db.Select_Utilities join UTL in Utility on SU equals UTL.Utility_Id
             where SU.Work_Id == 3
             select SU).ToList();
于 2013-03-06T11:31:02.083 回答