Interface IDataQuery

Read only data source basic interface

Inherited Members

IQueryable.ElementType

IQueryable.Expression

IQueryable.Provider

IEnumerable.GetEnumerator()

IDisposable.Dispose()

Namespace: XData

Assembly: XData.docfx.dll

Syntax

public interface IDataQuery : IOrderedQueryable, IQueryable, IEnumerable, IDisposable

Properties

Alias

Data repository alias

Declaration

string Alias { get; }

Property Value

Type	Description
String

Remarks

Default value is data object type name

Context

Data context

Declaration

string Context { get; }

Property Value

Type	Description
String

Keys

Data query/repository key properties

Declaration

string[] Keys { get; }

Property Value

Type	Description
String[]

Layer

Data repository layer

Declaration

Guid Layer { get; }

Property Value

Type	Description
Guid

Remarks

Sharing same layer the data object repositories can interact automatically as parent/child (see ExternalLinkAttribute)

Repositories on different layers but same data object are independent for each other

Repositories on same layer based on same data object is the same repository

Token

Cancellation token

Declaration

CancellationToken Token { get; }

Property Value

Type	Description
CancellationToken

Variables

Data query/repository/call result variables

Declaration

VariableIndexer Variables { get; }

Property Value

Type	Description
VariableIndexer

Remarks

Variable values can be used to set the filter values (query/repository)

Variable values can be used in custom logic (repository)

Variables is stored in query/repository/call result instance

Examples

var rep = dataScope.GetRepository<Customer>(variables: new []{"OurCode", "SELF"});
var newInvoice = dataScope.GetRepository<Invoice>().New();
newInvoice.CustomerFrom += rep.First(x => x.Code.CompareVariable(FilterOperation.Equal, "SELF"));

See Also

Variable

GetRepository<T>(String, ISecuritySession, Variable[])

XData.DataObjectExtensions.CompareVariable(XData.IDataQueryInternal,System.Object,XData.FilterOperation,System.String)

Extension Methods

DataObjectExtensions.GetParameter<T>(IDataQuery, String)

DataObjectExtensions.GetResultSet<TRes>(IDataQuery, String)

DataObjectExtensions.GetResultSet<TRes>(IDataQuery, Expression<Func<IEnumerable<TRes>>>)

SerializationExtensions.ToXml<T>(T)

AsyncExtensions.GetParameterAsync<T>(IDataQuery, String)

AsyncExtensions.GetResultSetAsync<TRes>(IDataQuery, String)

AsyncExtensions.GetResultSetAsync<TRes>(IDataQuery, Expression<Func<IEnumerable<TRes>>>)

CollectionsExtensions.SetValue<TKey, T>(TKey, T)

CollectionsExtensions.AsEnum<T>(T)

DataObjectQueryableExtensions.CompareVariable(Object, FilterOperation, String)

Processing.Do<T>(T, Action<IProcess<T>>[])

TypeExtensions.TryConvert<T, TResult>(T, Func<T, TResult>)

TypeExtensions.TryConvert<T, TResult>(T, Func<T, TResult>, TResult)

TypeExtensions.ChangeType<T>(Object)

TypeExtensions.ChangeType(Object, Type)

TypeExtensions.InvokeMethod<TRet>(Object, Type[], Expression<Func<TRet>>, BindingFlags)

TypeExtensions.InvokeMethod(Object, Type[], Expression<Action>, BindingFlags)

TypeExtensions.InvokeMethod<TRet>(Object, Expression<Func<TRet>>, BindingFlags)

TypeExtensions.InvokeMethod(Object, Expression<Action>, BindingFlags)

SqlBlockExtensions.SetExpression<TTag, TResult>(TTag, Expression<Func<IBlockQueryAdapter, TResult>>)

QueryDescriptionExtensions.SetExpression<TTag, TResult>(TTag, Expression<Func<IQueryStructureAdapter, TResult>>)