c++-cli - 如何在 Visual Studio 2012 C++ RichTextBox 中删除 KeyValue

Question

我如何删除呈现“Enter”的键？我希望程序在用户输入时显示“请输入 Espace 或 Tab”，然后删除此 Enter 键。谢谢！

private: System::Void richTextBoxCommentaire_KeyDown(System::Object^  sender, System::Windows::Forms::KeyEventArgs^  e) {
             if (e->KeyValue == (char)13)
             {
                    MessageBox::Show ("Please enter Espace or Tab");
//To delete this Key??
                 }
             }

Answer 1

sorry, using the previewKeyDown should have worked but try the next method :

Use the KeyDown event to filter the desired keys by setting the suppressKeyPress to true as you can see in the example below (the example is in C# for readability but conversion to C++ CLI should be trivial :) :

private void richTextBox1_KeyDown(object sender, KeyEventArgs e)
{
    e.SuppressKeyPress = e.KeyCode == Keys.Enter;
}