DataObject.GetData Method

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

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

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

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

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

Parameters

Returns

The data associated with the specified format, or null.

Implements

Examples

The following code example retrieves the data stored in a DataObject, using the autoConvert parameter to specify whether to convert the data format.

First, a new DataObject is created with text data. Then the example tries to retrieve the data, specifying its format as a string and no format conversion, that is, the autoConvert parameter is false. This operation fails because there is no string data in the DataObject.

Next, the example tries to retrieve the data again, with the autoConvert parameter set to true. This operation succeeds and the results are displayed in a MessageBox.

This code requires that textBox1 has been created.

private:
   void GetMyData3()
   {
      // Creates a new data object using a string and the text format.
      String^ myString = "My new text string";
      DataObject^ myDataObject = gcnew DataObject( DataFormats::Text,myString );
      
      // Prints the string in a text box with autoconvert = false.
      if ( myDataObject->GetData( "System.String", false ) != 0 )
      {
         // Prints the string in a text box.
         textBox1->Text = String::Concat(
            myDataObject->GetData( "System.String", false )->ToString(), "\n" );
      }
      else
      {
         textBox1->Text = "Could not find data of the specified format\n";
      }
      
      // Prints the string in a text box with autoconvert = true.
      textBox1->Text = String::Concat(
            textBox1->Text, myDataObject->GetData( "System.String", true )->ToString() );
   }

private void GetMyData3() {
    // Creates a new data object using a string and the text format.
    string myString = "My new text string";
    DataObject myDataObject = new DataObject(DataFormats.Text, myString);
 
    // Prints the string in a text box with autoconvert = false.
    if(myDataObject.GetData("System.String", false) != null) {
       // Prints the string in a text box.
       textBox1.Text = myDataObject.GetData("System.String", false).ToString() + '\n';
    } else
        {
            textBox1.Text = "Could not find data of the specified format" + '\n';
        }

        // Prints the string in a text box with autoconvert = true.
        textBox1.Text += myDataObject.GetData("System.String", true).ToString();
 }

Private Sub GetMyData3()
    ' Creates a new data object using a string and the text format.
    Dim myString As String = "My new text string"
    Dim myDataObject As New DataObject(DataFormats.Text, myString)
    
    ' Prints the string in a text box with autoconvert = false.
    If (myDataObject.GetData("System.String", False) IsNot Nothing) Then
        ' Prints the string in a text box.
        textBox1.Text = myDataObject.GetData("System.String", False).ToString() & ControlChars.Cr
    Else
        textBox1.Text = "Could not find data of the specified format" & ControlChars.Cr
    End If 
    ' Prints the string in a text box with autoconvert = true.
    textBox1.Text += myDataObject.GetData("System.String", True).ToString()
End Sub

Remarks

If the autoConvert parameter is true and this method cannot find data in the specified format, it attempts to convert the data to the format. If the data cannot be converted to the specified format, or if the data was stored with the automatic conversion set to false, this method returns null.

If the autoConvert parameter is false, this method returns data in the specified format, or null if no data in this format can be found.

To determine whether data is associated with, or can be converted to, a format, call GetDataPresent before calling GetData. Call GetFormats for a list of valid formats for the data stored in this DataObject.

See also

• SetData(String, Boolean, Object)
• GetDataPresent(Type)
• DataFormats
• GetFormats(Boolean)

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

public virtual object GetData (string format);

public virtual object? GetData (string format);

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

Public Overridable Function GetData (format As String) As Object

Parameters

Returns

The data associated with the specified format, or null.

Implements

Examples

The following code example retrieves the data stored in a DataObject. First, a new DataObject is created with text data. Then, the data is retrieved, specifying its format as a string, and displayed in a text box.

This code requires that textBox1 has been created.

private:
   void AddMyData3()
   {
      // Creates a component to store in the data object.
      Component^ myComponent = gcnew Component;
      
      // Creates a new data object.
      DataObject^ myDataObject = gcnew DataObject;
      
      // Adds the component to the DataObject.
      myDataObject->SetData( myComponent );
      
      // Prints whether data of the specified type is in the DataObject.
      Type^ myType = myComponent->GetType();
      if ( myDataObject->GetDataPresent( myType ) )
      {
         textBox1->Text = String::Concat( "Data of type ", myType,
            " is present in the DataObject" );
      }
      else
      {
         textBox1->Text = String::Concat( "Data of type ", myType,
            " is not present in the DataObject" );
      }
   }

private void AddMyData3() {
    // Creates a component to store in the data object.
    Component myComponent = new Component();
 
    // Creates a new data object.
    DataObject myDataObject = new DataObject();
 
    // Adds the component to the DataObject.
    myDataObject.SetData(myComponent);
 
    // Prints whether data of the specified type is in the DataObject.
    Type myType = myComponent.GetType();
    if(myDataObject.GetDataPresent(myType))
       textBox1.Text = "Data of type " + myType.ToString() + 
       " is present in the DataObject";
    else
       textBox1.Text = "Data of type " + myType.ToString() +
       " is not present in the DataObject";
 }

Private Sub AddMyData3()
    ' Creates a component to store in the data object.
    Dim myComponent As New Component()
    
    ' Creates a new data object.
    Dim myDataObject As New DataObject()
    
    ' Adds the component to the DataObject.
    myDataObject.SetData(myComponent)
    
    ' Prints whether data of the specified type is in the DataObject.
    Dim myType As Type = myComponent.GetType()
    If myDataObject.GetDataPresent(myType) Then
        textBox1.Text = "Data of type " & myType.ToString() & _
            " is present in the DataObject"
    Else
        textBox1.Text = "Data of type " & myType.ToString() & _
            " is not present in the DataObject"
    End If
End Sub

Remarks

If this method cannot find data in the specified format, it attempts to convert the data to the format. If the data cannot be converted to the specified format, or if the data was stored with automatic conversion set to false, this method returns null.

To determine whether data is associated with, or can be converted to, a format, call GetDataPresent before calling GetData. Call GetFormats for a list of valid formats for the data stored in this DataObject.

See also

• SetData(String, Boolean, Object)
• GetDataPresent(Type)
• DataFormats
• GetFormats(Boolean)

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

public virtual object GetData (Type format);

public virtual object? GetData (Type format);

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

Public Overridable Function GetData (format As Type) As Object

Parameters

Returns

The data associated with the specified format, or null.

Implements

Examples

The following code example retrieves the data stored in a DataObject. First, a new DataObject is created with a component. Then, the data is retrieved, specifying its type. The type of the retrieved data is displayed in a text box.

This code requires that textBox1 has been created.

private:
   void GetMyData()
   {
      // Creates a component to store in the data object.
      Component^ myComponent = gcnew Component;
      
      // Creates a new data object and assigns it the component.
      DataObject^ myDataObject = gcnew DataObject( myComponent );
      
      // Creates a type to store the type of data.
      Type^ myType = myComponent->GetType();
      
      // Retrieves the data using myType to represent its type.
      Object^ myObject = myDataObject->GetData( myType );
      if ( myObject != nullptr )
      {
         textBox1->Text = String::Format( "The data type stored in the DataObject is: {0}",
            myObject->GetType()->Name );
      }
      else
      {
         textBox1->Text = "Data of the specified type was not stored in the DataObject.";
      }
   }

private void GetMyData() {
    // Creates a component to store in the data object.
    Component myComponent = new Component();
 
    // Creates a new data object and assigns it the component.
    DataObject myDataObject = new DataObject(myComponent);
 
    // Creates a type to store the type of data.
    Type myType = myComponent.GetType();
 
    // Retrieves the data using myType to represent its type.
    Object myObject = myDataObject.GetData(myType);
    if(myObject != null)
       textBox1.Text = "The data type stored in the DataObject is: " +
       myObject.GetType().Name;
    else
       textBox1.Text = "Data of the specified type was not stored " +
       "in the DataObject.";
 }

Private Sub GetMyData()
    ' Creates a component to store in the data object.
    Dim myComponent As New Component()
    
    ' Creates a new data object and assigns it the component.
    Dim myDataObject As New DataObject(myComponent)
    
    ' Creates a type to store the type of data.
    Dim myType As Type = myComponent.GetType()
    
    ' Retrieves the data using myType to represent its type.
    Dim myObject As Object = myDataObject.GetData(myType)
    If (myObject IsNot Nothing) Then
        textBox1.Text = "The data type stored in the DataObject is: " & myObject.GetType().Name
    Else
        textBox1.Text = "Data of the specified type was not stored " & "in the DataObject."
    End If
End Sub

Remarks

If this method cannot find data in the specified format, it attempts to convert the data to the format. If the data cannot be converted to the specified format, or if the data was stored with automatic conversion set to false, this method returns null.

To determine whether data is associated with, or can be converted to, a format, call GetDataPresent before calling GetData. Call GetFormats for a list of valid formats for the data stored in this DataObject.

See also

• SetData(String, Boolean, Object)
• Type
• GetDataPresent(Type)
• DataFormats
• GetFormats(Boolean)