EditPoint2.LessThan 方法 (TextPoint)

项目
10/25/2012

返回被调用 EditPoint 对象的 AbsoluteCharOffset 的值是否小于给定 TextPoint 对象的值。

命名空间： EnvDTE80
程序集： EnvDTE80（在 EnvDTE80.dll 中）

语法

声明
Function LessThan ( _
    Point As TextPoint _
) As Boolean

bool LessThan(
    TextPoint Point
)

bool LessThan(
    [InAttribute] TextPoint^ Point
)

abstract LessThan : 
        Point:TextPoint -> bool

function LessThan(
    Point : TextPoint
) : boolean

参数

Point
类型：EnvDTE.TextPoint
必选。要与调用点对象进行比较的 TextPoint。

返回值

类型：System.Boolean
如果 Point 的 AbsoluteCharOffset 属性值大于调用点对象的 AbsoluteCharOffset 属性值，则为 true；否则为 false。

备注

如果 Point 与调用点对象不在同一文档中，LessThan 将引发 ArgumentException。对于 VirtualPoint 对象，如果参数是 VirtualPoint，LessThan 将比较虚拟位置。否则，它将比较物理位置。

示例

Sub LessThanExample(ByVal dte As DTE)

    ' Create a new text file.
    dte.ItemOperations.NewFile()
    Dim txtDoc As TextDocument = _
        CType(dte.ActiveDocument.Object(), TextDocument)

    ' Create an edit point at the empty text document's StartPoint 
    ' and EndPoint; CompareEditPoints displays "point1 and point2
    ' occupy the same location."
    Dim point1 As EditPoint = txtDoc.StartPoint.CreateEditPoint()
    Dim point2 As EditPoint = txtDoc.EndPoint.CreateEditPoint()
    CompareEditPoints(point1, point2)

    ' Insert ten lines of text.
    Dim i As Integer
    For i = 1 To 10
        point1.Insert("Line " & i.ToString() & vbCrLf)
    Next

    ' Create an edit point at the text document's StartPoint and 
    ' EndPoint; CompareEditPoints displays "point1 comes before point2."
    point1 = txtDoc.StartPoint.CreateEditPoint()
    point2 = txtDoc.EndPoint.CreateEditPoint()
    CompareEditPoints(point1, point2)

End Sub

Sub CompareEditPoints(ByVal point1 As EditPoint, _
    ByVal point2 As EditPoint)

    If point1.LessThan(point2) Then
        MsgBox("point1 comes before point2.")
    ElseIf point1.GreaterThan(point2) Then
        MsgBox("point2 comes before point1.")
    ElseIf (point1.EqualTo(point2)) Then
        MsgBox("point1 and point2 occupy the same location.")
    End If

End Sub

void LessThanExample(DTE dte)
{
    // Create a new text file.
    dte.ItemOperations.NewFile(@"General\Text File", "", 
        Constants.vsViewKindPrimary);
    TextDocument txtDoc = 
        (TextDocument)dte.ActiveDocument.Object("");

    // Create an edit point at the empty text document's StartPoint 
    // and EndPoint; CompareEditPoints displays "point1 and point2
    // occupy the same location."
    EditPoint point1 = txtDoc.StartPoint.CreateEditPoint();
    EditPoint point2 = txtDoc.EndPoint.CreateEditPoint();
    CompareEditPoints(point1, point2);

    // Insert ten lines of text.
    for (int i = 1; i <= 10; i++)
    {
        point1.Insert("Line " + i.ToString() + Environment.NewLine);
    }

    // Create an edit point at the text document's StartPoint and 
    // EndPoint; CompareEditPoints displays "point1 comes before 
    // point2."
    point1 = txtDoc.StartPoint.CreateEditPoint();
    point2 = txtDoc.EndPoint.CreateEditPoint();
    CompareEditPoints(point1, point2);
}

void CompareEditPoints(EditPoint point1, EditPoint point2)
{
    if (point1.LessThan(point2))
        MessageBox.Show("point1 comes before point2.");
    else if (point1.GreaterThan(point2))
        MessageBox.Show("point2 comes before point1.");
    else if (point1.EqualTo(point2))
        MessageBox.Show("point1 and point2 occupy the same location.");
}