,System.Linq.Expressions.Expression{System.Func{--0,System.Boolean}})} ,System.Linq.Expressions.Expression{System.Func{--0,System.Int32,System.Boolean}})}
Qbservable.Where(IQbservable, Expression>) method¶
Defined in
Type: Qbservable
Namespace: System.Reactive.Linq
Assembly: System.Reactive.dll
Applies to
netstandard2.0
Overloads¶
- 1.
public static IQbservable<TSource> Where<TSource>(this IQbservable<TSource> source, Expression<Func<TSource, bool>> predicate) - 2.
public static IQbservable<TSource> Where<TSource>(this IQbservable<TSource> source, Expression<Func<TSource, int, bool>> predicate)
1. Overload¶
public static IQbservable<TSource> Where<TSource>(this IQbservable<TSource> source, Expression<Func<TSource, bool>> predicate)
Summary: Filters the elements of an observable sequence based on a predicate.
Type parameters
| Name | Description |
|---|---|
TSource | The type of the elements in the source sequence. |
Parameters
| Name | Type | Description |
|---|---|---|
source | [IQbservable | An observable sequence whose elements to filter. |
predicate | Expression | A function to test each source element for a condition. |
Returns: IQbservable
Exceptions
| Type | Condition |
|---|---|
| System.ArgumentNullException | source or predicate is null. |
2. Overload¶
public static IQbservable<TSource> Where<TSource>(this IQbservable<TSource> source, Expression<Func<TSource, int, bool>> predicate)
Summary: Filters the elements of an observable sequence based on a predicate by incorporating the element's index.
Type parameters
| Name | Description |
|---|---|
TSource | The type of the elements in the source sequence. |
Parameters
| Name | Type | Description |
|---|---|---|
source | [IQbservable | An observable sequence whose elements to filter. |
predicate | Expression | A function to test each source element for a condition; the second parameter of the function represents the index of the source element. |
Returns: IQbservable
Exceptions
| Type | Condition |
|---|---|
| System.ArgumentNullException | source or predicate is null. |