IMappingPoint.GetPoint Method (ITextBuffer, PositionAffinity)
Maps the point to a particular ITextBuffer.
Namespace: Microsoft.VisualStudio.Text
Assembly: Microsoft.VisualStudio.Text.Data (in Microsoft.VisualStudio.Text.Data.dll)
Syntax
'宣言
Function GetPoint ( _
targetBuffer As ITextBuffer, _
affinity As PositionAffinity _
) As Nullable(Of SnapshotPoint)
Nullable<SnapshotPoint> GetPoint(
ITextBuffer targetBuffer,
PositionAffinity affinity
)
Nullable<SnapshotPoint> GetPoint(
ITextBuffer^ targetBuffer,
PositionAffinity affinity
)
abstract GetPoint :
targetBuffer:ITextBuffer *
affinity:PositionAffinity -> Nullable<SnapshotPoint>
function GetPoint(
targetBuffer : ITextBuffer,
affinity : PositionAffinity
) : Nullable<SnapshotPoint>
Parameters
- targetBuffer
Type: Microsoft.VisualStudio.Text.ITextBuffer
The ITextBuffer to which to map the point.
- affinity
Type: Microsoft.VisualStudio.Text.PositionAffinity
If the mapping is ambiguous (the position lies on a source span seam), this parameter affects the mapping as follows:
if affinity is Predecessor, the mapping targets the position immediately after the preceding character in the anchor buffer
if affinity is Successor, the mapping targets the position immediately before the following character in the anchor buffer.
This parameter has no effect if the mapping is unambiguous.
Return Value
Type: System.Nullable<SnapshotPoint>
A SnapshotPoint in the targeted buffer, or nulla null reference (Nothing in Visual Basic) if the point and affinity do not appear in that buffer.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentNullException | targetBuffer is null. |
Remarks
In general, a source span seam occurs at the end of a source span of nonzero length and the beginning of a source span of nonzero length, and coincides with zero or more source spans of zero length. Every span on a seam has a point in the result collection.
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.