如何通过单击按钮打开用户控件 C#
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How to open usercontrol in a click of a button C#
提问by Kraze
Firstly I had been searching about my problem and can't find \help.
So my question is I've got 3 buttons and three userControland when I click on one button it displays usercontrol 1 but after I click button 2. I cannot get back to usercontrol 1 im stuck in usercontrol2 and the button 1 does not do anything anymore.
Here's my code:
首先，我一直在寻找我的问题，但找不到 \help。所以我的问题是我有 3 个按钮和三个按钮，userControl当我单击一个按钮时，它会显示 usercontrol 1，但是在我单击按钮 2 之后。我无法回到 usercontrol 1 中，我卡在 usercontrol2 中，而按钮 1 不再执行任何操作. 这是我的代码：
public partial class Form2 : Form
{
UserControl1 u1;
UserControl2 u2;
UserControl3 u3;
public Form2()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
u1 = new UserControl1();
u1.Dock = DockStyle.Fill;
this.Controls.Add(u1);
}
private void button2_Click(object sender, EventArgs e)
{
u1.Hide();
u2 = new UserControl2();
u2.Dock = DockStyle.Fill;
this.Controls.Add(u2);
}
private void button3_Click(object sender, EventArgs e)
{
u1.Hide();
u2.Hide();
u3 = new UserControl3();
u3.Dock = DockStyle.Fill;
this.Controls.Add(u3);
}
private void button4_Click(object sender, EventArgs e)
{
Application.Exit();
}
}
SOLVED CODE for other's who need :) --->
为其他需要的人解决代码:) --->
enter code here
public partial class Form2 : Form
{
UserControl1 u1;
UserControl2 u2;
UserControl3 u3;
public Form2()
{
u1 = new UserControl1();
u2 = new UserControl2();
u3 = new UserControl3();
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
u2.Hide();
u3.Hide();
u1.Show();
u1.Dock = DockStyle.Fill;
this.Controls.Add(u1);
}
private void button2_Click(object sender, EventArgs e)
{
u1.Hide();
u3.Hide();
u2.Show();
u2.Dock = DockStyle.Fill;
this.Controls.Add(u2);
}
private void button3_Click(object sender, EventArgs e)
{
u1.Hide();
u2.Hide();
u3.Show();
u3.Dock = DockStyle.Fill;
this.Controls.Add(u3);
}
private void button4_Click(object sender, EventArgs e)
{
Application.Exit();
}
}
回答by Qi Chen
It seems that you should have:
看来你应该有：
u1=new UserControl1();
u2=new UserControl2();
u3=new UserControl3();
in the constructor public Form2()rather than in the event handlers. This will allow you to add
在构造函数中public Form2()而不是在事件处理程序中。这将允许您添加
u2.Hide();
u3.Hide();
in your button1_Clickhandler.
在你的button1_Click处理程序中。
You should probably also add u3.Hide()to button2_Click.
您可能还应该添加u3.Hide()到button2_Click.
回答by varg
Take a look at this. I think it's absolutely clear and didn't need any further explanation.
看看这个。我认为这绝对清楚，不需要任何进一步的解释。
public partial class Form1 : Form
{
private UserControl1 uc1 = new UserControl1();
private UserControl2 uc2 = new UserControl2();
private UserControl3 uc3 = new UserControl3();
public Form1()
{
InitializeComponent();
AssignedButtonClickEvents();
}
private void Form1_Load(object sender, EventArgs e)
{
}
protected void ButtonClicked(object sender, EventArgs e)
{
Button button = sender as Button;
panel1.Controls.Clear();
if (button != null)
{
switch (button.Name)
{
case "button1":
uc1.Dock = DockStyle.Fill;
panel1.Controls.Add(uc1);
break;
case "button2":
uc2.Dock = DockStyle.Fill;
panel1.Controls.Add(uc2);
break;
case "button3":
uc3.Dock = DockStyle.Fill;
panel1.Controls.Add(uc3);
break;
default:
panel1.Controls.Clear();
break;
}
}
}
public void AssignedButtonClickEvents()
{
foreach (Control ctl in this.Controls)
{
if (ctl is Button)
{
Button button = (Button)ctl;
button.Click += new EventHandler(ButtonClicked);
}
}
}
edit
note that i create a panel to store the usercontrols, but i think it's the same if you show your user controls directly on the windows forms. you only need to hide your controls.
编辑
请注意，我创建了一个面板来存储用户控件，但我认为如果您直接在 Windows 窗体上显示用户控件也是一样的。你只需要隐藏你的控件。
