Lenguaje

StrokeCollectionConverter.ConvertFrom Método

Definición

Espacio de nombres:
System.Windows
Ensamblado:
PresentationCore.dll

Convierte el objeto especificado en un StrokeCollectionobjeto .

public:
 override System::Object ^ ConvertFrom(System::ComponentModel::ITypeDescriptorContext ^ context, System::Globalization::CultureInfo ^ culture, System::Object ^ value);
public override object ConvertFrom(System.ComponentModel.ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value);
override this.ConvertFrom : System.ComponentModel.ITypeDescriptorContext * System.Globalization.CultureInfo * obj -> obj
Public Overrides Function ConvertFrom (context As ITypeDescriptorContext, culture As CultureInfo, value As Object) As Object

Parámetros

context
ITypeDescriptorContext

que ITypeDescriptorContext proporciona un contexto de formato.

culture
CultureInfo

CultureInfo que se va a usar como referencia cultural actual.

value
Object

que Object se va a convertir.

Devoluciones

Object

StrokeCollection Convertido de value.

Ejemplos

En el ejemplo siguiente se muestra cómo convertir una cadena con formato serializado de lápiz (ISF) codificada en base StrokeCollection64 a . Esto supone que hay un InkPresenter objeto denominado presenter.

// The base-64 encoded string that contains ink data 
// in ink serialized format (ISF).
string strokesString =
    @"AOoFAxBIEEVqGwIAWf9GahsCAFn/GRQyCACAEAIAAABCMwgAgA"
    + "wCAAAAQhWrqtNBq6rTQaVh0MSr+ivFHyEVVFVVVVV1OkBUVVVVVXU6QJ7"
    + "0SZ80DJrAVFVVVVV/pcAKU3yC/gEb+AX/k5Z8PwWBO5KktgJSUAAKjzyC"
    + "wBZYLEoCJLd+Cbti873JlTUvn158doCC/gKb+ApwAJslSywE2ALAAWPPI"
    + "FhKWBKWAKAmwJVglAKACiMjgv3d+8Xi+fHWM2WC0zcm89+NSoL+A5P4Dl"
    + "uNlhFIqpLKAAoaF4L+AhP4CFAWAWCggv4Dc/gNty2yy5SrlKAKIhyC/gI"
    + "b+Ai+JZc2XZOyb46vLQCC/gOL+A5YDNlWFjN3CwAKQFeC/gOr+A7VhUFZ"
    + "KCsS2WTc2SyhKuWVLR3ly2LAXx574ssUgv4Dm/gOcCwEEpUTYSixUsuWy"
    + "gVZ79AQsWGyWUAKLCiC/gQT+BA9SWbllDfGqy3Lcu+OmfH8EIL+BDv4EP"
    + "XLKSpY3lVFhZuVZvKACkFggv4F2/gXlKLFuCVKTcsqUlkoRKBmk8zfFll"
    + "S2ySlACwAgv4Ds/gO+WWWWLBLFllllSksAoSkWG1kSbFu5AoAAAo/YoL+"
    + "Biv4GJJU+P4qSalUBKWdkBYCbm+Nliyk1CVKgCxYNYqC/gQb+BBwO8ABY"
    + "olDz4gAEzaw2AVCUKAsWCooCiAegv4Hw/gfEJe8zUoSgLCC/gNT+A0xM7"
    + "Gdmdliay2VaAo0PoL+B7v4Hx5Yq3lc2xZsseeC3N8aDXjUpWW4UIL+A5P"
    + "4DnhYqAIWFkqpcrLZuJuWqSyxVAovNoL+CJP4IjnlkDvHeSbSVd9FqFlI"
    + "oWAAgv4Dk/gOVc7gbmdyZ1LajFFJmlRKsoAKVXmC/go7+CjdRvredypaK"
    + "myLC7ytZQqFiyWbikAEvfg2pSVKS7liSwWJNsrbi4CC/gQD+A/9M2ACxU"
    + "qKjcVuXKiosCWWKQSyhvKRUUWULCwEmyyu4gA=";

' The base-64 encoded string that contains ink data 
' in ink serialized format (ISF).
Private strokesString As String = _
    "AOoFAxBIEEVqGwIAWf9GahsCAFn/GRQyCACAEAIAAABCMwgAgA" _
    & "wCAAAAQhWrqtNBq6rTQaVh0MSr+ivFHyEVVFVVVVV1OkBUVVVVVXU6QJ7" _
    & "0SZ80DJrAVFVVVVV/pcAKU3yC/gEb+AX/k5Z8PwWBO5KktgJSUAAKjzyC" _
    & "wBZYLEoCJLd+Cbti873JlTUvn158doCC/gKb+ApwAJslSywE2ALAAWPPI" _
    & "FhKWBKWAKAmwJVglAKACiMjgv3d+8Xi+fHWM2WC0zcm89+NSoL+A5P4Dl" _
    & "uNlhFIqpLKAAoaF4L+AhP4CFAWAWCggv4Dc/gNty2yy5SrlKAKIhyC/gI" _
    & "b+Ai+JZc2XZOyb46vLQCC/gOL+A5YDNlWFjN3CwAKQFeC/gOr+A7VhUFZ" _
    & "KCsS2WTc2SyhKuWVLR3ly2LAXx574ssUgv4Dm/gOcCwEEpUTYSixUsuWy" _
    & "gVZ79AQsWGyWUAKLCiC/gQT+BA9SWbllDfGqy3Lcu+OmfH8EIL+BDv4EP" _
    & "XLKSpY3lVFhZuVZvKACkFggv4F2/gXlKLFuCVKTcsqUlkoRKBmk8zfFll" _
    & "S2ySlACwAgv4Ds/gO+WWWWLBLFllllSksAoSkWG1kSbFu5AoAAAo/YoL+" _
    & "Biv4GJJU+P4qSalUBKWdkBYCbm+Nliyk1CVKgCxYNYqC/gQb+BBwO8ABY" _
    & "olDz4gAEzaw2AVCUKAsWCooCiAegv4Hw/gfEJe8zUoSgLCC/gNT+A0xM7" _
    & "Gdmdliay2VaAo0PoL+B7v4Hx5Yq3lc2xZsseeC3N8aDXjUpWW4UIL+A5P" _
    & "4DnhYqAIWFkqpcrLZuJuWqSyxVAovNoL+CJP4IjnlkDvHeSbSVd9FqFlI" _
    & "oWAAgv4Dk/gOVc7gbmdyZ1LajFFJmlRKsoAKVXmC/go7+CjdRvredypaK" _
    & "myLC7ytZQqFiyWbikAEvfg2pSVKS7liSwWJNsrbi4CC/gQD+A/9M2ACxU" _
    & "qKjcVuXKiosCWWKQSyhvKRUUWULCwEmyyu4gA="

// Accepts a string that contains ink data in ink 
// serialized format (ISF) and converts it into a StrokeCollection.
public void LoadStrokes()
{
    StrokeCollectionConverter converter =
        new StrokeCollectionConverter();

    if (converter.CanConvertFrom(typeof(string)))
    {
        StrokeCollection newStrokes =
            (StrokeCollection)converter.ConvertFrom(null, null, strokesString);
        presenter.Strokes.Clear();
        presenter.Strokes.Add(newStrokes);
    }
}

' Accepts a string that contains ink data in ink 
' serialized format (ISF) and converts it into a StrokeCollection.
Public Sub LoadStrokes()

    Dim converter As New StrokeCollectionConverter()

    If converter.CanConvertFrom(GetType(String)) Then
        Dim newStrokes As StrokeCollection

        newStrokes = converter.ConvertFrom(Nothing, Nothing, strokesString)
        presenter.Strokes.Clear()
        presenter.Strokes.Add(newStrokes)

    End If

End Sub

Comentarios

El ConvertFrom método devuelve null si value no es .String

Se aplica a