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IBufferGraph.MapUpToBuffer Method (SnapshotPoint, PointTrackingMode, PositionAffinity, ITextBuffer)

Maps a position in the current snapshot of some buffer that is a member of the buffer graph to a snapshot of some buffer.

Namespace:  Microsoft.VisualStudio.Text.Projection
Assembly:  Microsoft.VisualStudio.Text.Data (in Microsoft.VisualStudio.Text.Data.dll)

Syntax

'宣言
Function MapUpToBuffer ( _
    point As SnapshotPoint, _
    trackingMode As PointTrackingMode, _
    affinity As PositionAffinity, _
    targetBuffer As ITextBuffer _
) As Nullable(Of SnapshotPoint)
Nullable<SnapshotPoint> MapUpToBuffer(
    SnapshotPoint point,
    PointTrackingMode trackingMode,
    PositionAffinity affinity,
    ITextBuffer targetBuffer
)
Nullable<SnapshotPoint> MapUpToBuffer(
    SnapshotPoint point, 
    PointTrackingMode trackingMode, 
    PositionAffinity affinity, 
    ITextBuffer^ targetBuffer
)
abstract MapUpToBuffer : 
        point:SnapshotPoint * 
        trackingMode:PointTrackingMode * 
        affinity:PositionAffinity * 
        targetBuffer:ITextBuffer -> Nullable<SnapshotPoint> 
function MapUpToBuffer(
    point : SnapshotPoint, 
    trackingMode : PointTrackingMode, 
    affinity : PositionAffinity, 
    targetBuffer : ITextBuffer
) : Nullable<SnapshotPoint>

Parameters

  • affinity
    Type: Microsoft.VisualStudio.Text.PositionAffinity
    If the mapping is ambiguous (the position is on a source span seam), determines whether the mapping should target the position immediately after the preceding character or immediately before the following character in the top buffer.
    This setting has no effect if the mapping is unambiguous.

Return Value

Type: System.Nullable<SnapshotPoint>
The corresponding position in a snapshot of the target buffer, or nulla null reference (Nothing in Visual Basic) if the position does not map to the target buffer.

Exceptions

Exception Condition
ArgumentNullException

point.Snapshot is nulla null reference (Nothing in Visual Basic).

ArgumentOutOfRangeException

trackingMode is not a valid PointTrackingMode, or affinity is not a valid PositionAffinity.

.NET Framework Security

See Also

Reference

IBufferGraph Interface

MapUpToBuffer Overload

Microsoft.VisualStudio.Text.Projection Namespace