TextBoxBase.AppendText Method

Appends text to the current text of text box.

[Visual Basic]
Public Sub AppendText( _
   ByVal text As String _
)
[C#]
public void AppendText(
 string text
);
[C++]
public: void AppendText(
 String* text
);
[JScript]
public function AppendText(
   text : String
);

Parameters

text

The text to append to the current contents of the text box.

Remarks

You can use this method to add text to the existing text in the control instead of using the concatenation operator (+) to concatenate text to the Text property.

Example

[Visual Basic, C#, C++] The following example demonstrates how to use the AppendText method and the TextLength property to copy text from one TextBox to another. This example assumes that two TextBox controls named, textBox1 and textBox2, have been added to a form and that textBox1 has text assigned to its Text property.

[Visual Basic] 
Private Sub AppendTextBox1Text()
   ' Determine if text is selected in textBox1.
   If textBox1.SelectionLength = 0 Then
      ' No selection made, return.
      Return
   End If
   ' Determine if the text being appended to textBox2 exceeds the MaxLength property.
   If textBox1.SelectedText.Length + textBox2.TextLength > textBox2.MaxLength Then
      MessageBox.Show("The text to paste in is larger than the maximum number of characters allowed")
      ' Append the text from textBox1 into textBox2.
   Else
      textBox2.AppendText(textBox1.SelectedText)
   End If
End Sub

[C#] 
private void AppendTextBox1Text()
{
   // Determine if text is selected in textBox1.
   if(textBox1.SelectionLength == 0)
      // No selection made, return.
      return;
   
   // Determine if the text being appended to textBox2 exceeds the MaxLength property.
   if((textBox1.SelectedText.Length + textBox2.TextLength) > textBox2.MaxLength)
      MessageBox.Show("The text to paste in is larger than the maximum number of characters allowed");
   else
      // Append the text from textBox1 into textBox2.
      textBox2.AppendText(textBox1.SelectedText);
}

[C++] 
private:
    void AppendTextBox1Text()
    {
        // Determine if text is selected in textBox1.
        if(textBox1->SelectionLength == 0)
            // No selection made, return.
            return;

        // Determine if the text being appended to textBox2 exceeds the MaxLength property.
        if((textBox1->SelectedText->Length + textBox2->TextLength) > textBox2->MaxLength)
            MessageBox::Show(S"The text to paste in is larger than the maximum number of characters allowed");
        else
            // Append the text from textBox1 into textBox2.
            textBox2->AppendText(textBox1->SelectedText);
    }

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also

TextBoxBase Class | TextBoxBase Members | System.Windows.Forms Namespace | Copy | Paste