TextBoxBase.AppendText(String) 方法

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

將文字附加至文字方塊的目前文字中。

public:
 void AppendText(System::String ^ text);

public void AppendText (string? text);

member this.AppendText : string -> unit

Public Sub AppendText (text As String)

參數

text

String

要附加於文字方塊目前的內容中的文字。

範例

下列程式碼範例示範如何使用 AppendText 方法和 TextLength 屬性，將文字從一個複製到另一個 TextBox 。 本範例要求已將名為 textBox1 和 的兩 TextBox 個控制項新增至表單， textBox1 且已將文字指派給其 TexttextBox2 屬性。

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" ); // Append the text from textBox1 into textBox2.
   else
         textBox2->AppendText( textBox1->SelectedText );
}

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);
}

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

備註

您可以使用此方法，將文字新增至控制項中的現有文字，而不要使用串連運算子 (+) 將文字串連至 Text 屬性。

另請參閱

• Copy()
• Paste()