windows - 在 Windows 应用程序中将文本框背景颜色更改为焦点

Question

在 Windows 窗体中，我需要将文本框 BackColor 更改为焦点。我想在每个文本框或控件焦点上执行此操作。

当此文本框的 textbox1 BackColor 的焦点应该更改并且现在我按 Tab 键时，焦点转到下一个文本框 (textbox2) 现在 textbox2 的 BackColor 应该更改并且 textbox1 BackColor 应该更改回默认颜色。

Answer 1

看看 C# 解决方案：

//Properties declaration
private System.Drawing.Color NormalColor = System.Drawing.Color.FromArgb(50, 82, 110);
private System.Drawing.Color FocusColor = System.Drawing.Color.FromArgb(42, 65, 84);

// Else where in the Constructor
textBox_Username.Enter += EnterEvent;
textBox_Password.Enter += EnterEvent;
textBox_Username.Leave += LeaveEvent;
textBox_Password.Leave += LeaveEvent;

// Outside the Constructor
private void EnterEvent(object sender, EventArgs e)
{
    if (sender is TextBox)
        ((TextBox)sender).BackColor = FocusColor;
}

private void LeaveEvent(object sender, EventArgs e)
{
    if (sender is TextBox)
        ((TextBox)sender).BackColor = NormalColor;
}

Answer 2

在名为GotFocus的文本框事件上

Private Sub TextBox1_GotFocus(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles TextBox1.GotFocus

    textbox1.backcolor = color.red

End Sub

在名为LostFocus的文本框事件上

Private Sub TextBox1_LostFocus(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles TextBox1.LostFocus

    textbox1.backcolor = color.white

End Sub