Question

点击按钮1显示图片A，再次点击就会隐藏A. 点击按钮2显示...

Answer 1

protected void Button1_Click1(object sender, EventArgs e)
{
if (Image1.Visible = false)
{
Image1.Visible = true;
}
else
{
Image1.Visible = false;
}
}

protected void Button2_Click(object sender, EventArgs e)
{

Image2.Visible = true;

}

protected void Button3_Click(object sender, EventArgs e)
{

Image3.Visible = false;

}