xpo-devexpress-dot-xpo-dot-metadata-dot-xpclassinfo-359be16c.md
Gets information on the key property or key field.
Namespace : DevExpress.Xpo.Metadata
Assembly : DevExpress.Xpo.v25.2.dll
NuGet Package : DevExpress.Xpo
public XPMemberInfo KeyProperty { get; }
Public ReadOnly Property KeyProperty As XPMemberInfo
| Type | Description |
|---|---|
| XPMemberInfo |
An XPMemberInfo object which provides information about the key property or key field. If null ( Nothing in Visual Basic) a KeyPropertyAbsentException is thrown.
|
Use this property to retrieve information on the member which provides key values for unique identification of the persistent objects within the collection.
See the Microsoft .NET Framework Documentation and Microsoft SQL Server Guide in order to learn more about relational databases.
The following code snippets (auto-collected from DevExpress Examples) contain references to the KeyProperty property.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.
XPO_how-to-implement-odata4-service-with-xpo-netcore/CS/ODataService/Models/SingletonEdmModel.cs#L66
} else {
if(classInfo.KeyProperty is ReflectionFieldInfo) {
foreach(XPMemberInfo mi in classInfo.Members) {
XPO_how-to-implement-odata4-service-with-xpo/CS/ODataService/App_Start/WebApiConfig.cs#L79
} else {
if(classInfo.KeyProperty is ReflectionFieldInfo) {
foreach(XPMemberInfo mi in classInfo.Members) {
See Also