UseEffect¶
method
cref: M:Microsoft.UI.Reactor.Core.RenderContext.UseEffect(System.Action,System.Object[])
Overloads¶
UseEffect(Action, object[])UseEffect(Func<Action>, object[])UseEffect<T1>(Action, T1)UseEffect<T1>(Func<Action>, T1)UseEffect<T1, T2>(Action, T1, T2)UseEffect<T1, T2>(Func<Action>, T1, T2)UseEffect<T1, T2, T3>(Action, T1, T2, T3)UseEffect<T1, T2, T3>(Func<Action>, T1, T2, T3)
UseEffect(Action, object[])¶
method
cref: M:Microsoft.UI.Reactor.Core.RenderContext.UseEffect(System.Action,System.Object[])
Summary¶
Runs a side effect after render. The effect re-runs when any dependency changes. Pass an empty array for "run once on mount" semantics. Returns a cleanup action that runs before the next effect or on unmount.
UseEffect(Func<Action>, object[])¶
method
cref: M:Microsoft.UI.Reactor.Core.RenderContext.UseEffect(System.Func{System.Action},System.Object[])
Summary¶
Like UseEffect but the effect returns a cleanup function.
UseEffect<T1>(Action, T1)¶
method
cref: M:Microsoft.UI.Reactor.Core.RenderContext.UseEffect``1(System.Action,``0)
Summary¶
Single-dependency UseEffect overload that avoids the
params object[] allocation (and value-type boxing) on the
deps-unchanged path. Semantically identical to the params overload called
with one dependency: the effect re-runs only when d1
changes.
Discussion¶
If d1's compile-time type is an array of reference types
(e.g. string[]), it is treated as a dependency list and compared
element-wise — matching the params object[] overload — not as a single
reference-compared value. A dependency whose static type is not an array is
always compared as one value, even if its runtime value happens to be an array.
UseEffect<T1>(Func<Action>, T1)¶
method
cref: M:Microsoft.UI.Reactor.Core.RenderContext.UseEffect``1(System.Func{System.Action},``0)
Summary¶
Single-dependency cleanup-flavor UseEffect overload that avoids the
params object[] allocation on the deps-unchanged path. Semantically
identical to the params overload called with one dependency.
Discussion¶
If d1's compile-time type is an array of reference types
(e.g. string[]), it is treated as a dependency list and compared
element-wise — matching the params object[] overload — not as a single
reference-compared value. A dependency whose static type is not an array is
always compared as one value, even if its runtime value happens to be an array.
UseEffect<T1, T2>(Action, T1, T2)¶
method
cref: M:Microsoft.UI.Reactor.Core.RenderContext.UseEffect``2(System.Action,``0,``1)
Summary¶
Two-dependency UseEffect overload that avoids the
params object[] allocation on the deps-unchanged path. Re-runs when
either dependency changes.
UseEffect<T1, T2>(Func<Action>, T1, T2)¶
method
cref: M:Microsoft.UI.Reactor.Core.RenderContext.UseEffect``2(System.Func{System.Action},``0,``1)
Summary¶
Two-dependency cleanup-flavor UseEffect overload that avoids the
params object[] allocation on the deps-unchanged path.
UseEffect<T1, T2, T3>(Action, T1, T2, T3)¶
method
cref: M:Microsoft.UI.Reactor.Core.RenderContext.UseEffect``3(System.Action,``0,``1,``2)
Summary¶
Three-dependency UseEffect overload that avoids the
params object[] allocation on the deps-unchanged path. Re-runs when
any dependency changes.
UseEffect<T1, T2, T3>(Func<Action>, T1, T2, T3)¶
method
cref: M:Microsoft.UI.Reactor.Core.RenderContext.UseEffect``3(System.Func{System.Action},``0,``1,``2)
Summary¶
Three-dependency cleanup-flavor UseEffect overload that avoids the
params object[] allocation on the deps-unchanged path.