asp.net - Binding entities with foreign key to datalist -

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मेरे पास निम्न कोड है: 

  var devices = d से ctx.Devices। शामिल करें ("DeviceGroups") जहां d.eviceEnabled == सही चुनें d; DlTerminals.DataSource = डिवाइस; सामने के अंत में मैं निम्नलिखित करता हूं:  
  & lt; asp: DataList ID = "dlTerminals" runat = "server" DataKeyField = "DeviceId"  
 
 ग्रिडलाइन = "कोई नहीं" दोहराएं कॉलम = "2" दोहराएं निर्देशन = "क्षैतिज" चौड़ाई = "100%" & gt; & LT; ItemTemplate & gt; & Lt;% # Eval ("DeviceGroups.GroupName")% & gt; & Lt; / ItemTemplate & gt; & Lt; / एएसपी: DataList & gt;

लेकिन मुझे निम्न त्रुटि मिलती है:

नाम 'GroupName' नाम के साथ एक संपत्ति नहीं है।

एक समाधान मिला: 

  नया चुनें {d.DeviceId, d.MAC, d। DeviceType, d.LastConnectTime, d.DeviceGroups.FirstOrDefault ()। GroupName};

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