DataObject.GetData 方法

public:
 virtual System::Object ^ GetData(System::String ^ format);

public object GetData(string format);

public object? GetData(string format);

abstract member GetData : string -> obj
override this.GetData : string -> obj

Public Function GetData (format As String) As Object

参数

返回

一个对象，该对象包含指定格式的数据，或者 null 如果数据以指定格式不可用。

实现

例外

示例

以下示例使用此方法首先检查指定的数据格式是否可用（本机还是通过自动转换）：如果指定的格式可用，该示例将使用 GetData(String) 该方法检索数据。

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[];
}

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

以下示例代码使用 GetDataPresent(String, Boolean) 该方法首先检查指定的数据格式是否以本机方式可用（已筛选自动转换数据格式）;如果指定格式可用，则示例使用 GetData(String) 该方法检索数据。

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[];
}

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

另请参阅

• 加载已删除的文件示例

public:
 virtual System::Object ^ GetData(Type ^ format);

public object GetData(Type format);

public object? GetData(Type format);

abstract member GetData : Type -> obj
override this.GetData : Type -> obj

Public Function GetData (format As Type) As Object

参数

返回

具有指定格式的数据对象，或者 null 数据以指定格式不可用。

实现

例外

另请参阅

• 加载已删除的文件示例

public:
 virtual System::Object ^ GetData(System::String ^ format, bool autoConvert);

public object GetData(string format, bool autoConvert);

public object? GetData(string format, bool autoConvert);

abstract member GetData : string * bool -> obj
override this.GetData : string * bool -> obj

Public Function GetData (format As String, autoConvert As Boolean) As Object

参数

返回

具有指定格式的数据对象，或者 null 数据以指定格式不可用。

如果参数是且无法将数据转换为指定格式，或者禁用自动转换（通过调用参数设置为 <a0/>），此方法将返回。

实现

例外

另请参阅

• 加载已删除的文件示例