Como: Recuperar Dados em um Formato de Dados Específico
The following examples show how to retrieve data from a data object in a specified format.
Example
Description
The following example code uses the GetDataPresent(String) overload to first check if a specified data format is available (natively or by auto-convert); if the specified format is available, the example retrieves the data by using the GetData(String) method.
Code
Dim dataObject As New DataObject("Some string data to store...")
Dim desiredFormat As String = DataFormats.UnicodeText
Dim data() As Byte = Nothing
' Use the GetDataPresent method to check for the presence of a desired data format.
' This particular overload of GetDataPresent looks for both native and auto-convertible
' data formats.
If dataObject.GetDataPresent(desiredFormat) Then
' If the desired data format is present, use one of the GetData methods to retrieve the
' data from the data object.
data = TryCast(dataObject.GetData(desiredFormat), Byte())
End If
DataObject dataObject = new DataObject("Some string data to store...");
string desiredFormat = DataFormats.UnicodeText;
byte[] data = null;
// Use the GetDataPresent method to check for the presence of a desired data format.
// This particular overload of GetDataPresent looks for both native and auto-convertible
// data formats.
if (dataObject.GetDataPresent(desiredFormat))
{
// If the desired data format is present, use one of the GetData methods to retrieve the
// data from the data object.
data = dataObject.GetData(desiredFormat) as byte[];
}
Example
Description
The following example code uses the GetDataPresent(String, Boolean) overload to first check if a specified data format is available natively (auto-convertible data formats are filtered); if the specified format is available, the example retrieves the data by using the GetData(String) method.
Code
Dim dataObject As New DataObject("Some string data to store...")
Dim desiredFormat As String = DataFormats.UnicodeText
Dim noAutoConvert As Boolean = False
Dim data() As Byte = Nothing
' Use the GetDataPresent method to check for the presence of a desired data format.
' The autoconvert parameter is set to false to filter out auto-convertible data formats,
' returning true only if the specified data format is available natively.
If dataObject.GetDataPresent(desiredFormat, noAutoConvert) Then
' If the desired data format is present, use one of the GetData methods to retrieve the
' data from the data object.
data = TryCast(dataObject.GetData(desiredFormat), Byte())
End If
DataObject dataObject = new DataObject("Some string data to store...");
string desiredFormat = DataFormats.UnicodeText;
bool noAutoConvert = false;
byte[] data = null;
// Use the GetDataPresent method to check for the presence of a desired data format.
// The autoconvert parameter is set to false to filter out auto-convertible data formats,
// returning true only if the specified data format is available natively.
if (dataObject.GetDataPresent(desiredFormat, noAutoConvert))
{
// If the desired data format is present, use one of the GetData methods to retrieve the
// data from the data object.
data = dataObject.GetData(desiredFormat) as byte[];
}