Windows应用程序，更改文本框BackColor on focus

Question

在窗体我需要更改textbox BackColor on focus。我想在每个文本框或控件焦点上执行此操作。

说明： -当焦点在这个文本框TextBox1的背景色要改变，现在我按Tab键，焦点转移到下一个文本框（TextBox2中）现在TextBox2中的背景色应该是变化和TextBox1的背景色应改回作为默认颜色。

我急需回答。任何人都可以帮助我吗？

由于提前，

阿米特

Answer 1

在文本框的事件命名GotFocus

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

    textbox1.backcolor = color.red 

End Sub 

在文本框的事件命名LostFocus

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

    textbox1.backcolor = color.white 

End Sub 

Answer 2

看哪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; 
}