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StrokeCollectionConverter.ConvertFrom Método

Definición

Convierte el objeto especificado en un tipo de datos StrokeCollection.

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

ITypeDescriptorContext que ofrece un contexto de formato.

culture
CultureInfo

Objeto CultureInfo que se va a usar como referencia cultural actual.

value
Object

Valor Object que se va a convertir.

Devoluciones

Object

StrokeCollection convertida desde value.

Ejemplos

En el ejemplo siguiente se muestra cómo convertir una cadena con formato serializado de entrada de lápiz (ISF) codificada en base 64 a .StrokeCollection Esto supone que hay un InkPresenter elemento 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