当焦点输入C＃winforms时，如何更改所有文本框的背景颜色 [英] How to change the background color of all textboxes when focus enter in C# winforms

问题描述

你好！

i在表单中有很多文本框我想在焦点输入文本框时将背景颜色更改为当它的背景颜色变为银色或白色时



我尝试了什么：



i尝试了很多但没有找到好的东西

解决方案

处理TextBox.Enter和Leave事件：

 private void myTextBox_Enter（object sender，EventArgs e）
 {
 TextBox tb = sender as TextBox; 
 if（tb！= null）
 {
 tb.BackColor = Color.Silver; 
} 
} 
 
 private void myTextBox_Leave（object sender，EventArgs e）
 {
 TextBox tb = sender as TextBox; 
 if（tb！= null）
 {
 tb.BackColor = Color.White; 
} 
} 
 

hello guys!
i have many textboxes in a form i want to change the background color into when focus enter to a textbox and when it leaves its background color changes into silver or white

What I have tried:

i tried a lot but didn't find something good

解决方案

Handle the TextBox.Enter and Leave events:

private void myTextBox_Enter(object sender, EventArgs e)
    {
    TextBox tb = sender as TextBox;
    if (tb != null)
        {
        tb.BackColor = Color.Silver;
        }
    }

private void myTextBox_Leave(object sender, EventArgs e)
    {
    TextBox tb = sender as TextBox;
    if (tb != null)
        {
        tb.BackColor = Color.White;
        }
    }

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