CheckBox控件

前台代码：

<asp:CheckBox ID="CheckBox1" runat="server" Text ="苹果"/>
<asp:CheckBox ID="CheckBox2" runat="server" Text ="柠檬"/>
<asp:CheckBox ID="CheckBox3" runat="server" Text ="橘子"/>
<asp:CheckBox ID="CheckBox4" runat="server" Text ="桃子"/>
<asp:Button ID="Button2" runat="server" Text="结果" OnClick ="Button2_Click"/>
<asp:Label ID="Label2" runat="server" Text=""></asp:Label>

后台代码：

/// <summary>
/// Button单击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void Button2_Click(object sender, EventArgs e)
{
    string s = string.Empty;

    if (this.CheckBox1.Checked)
    {
        s += this.CheckBox1.Text + " ";
    }
    if (this.CheckBox2.Checked)
    {
        s += this.CheckBox2.Text + " ";
    }
    if (this.CheckBox3.Checked)
    {
        s += this.CheckBox3.Text + " ";
    }
    if (this.CheckBox4.Checked)
    {
        s += this.CheckBox4.Text + " ";
    }

    this.Label2.Text = "你选择的水果有：" + s;
}

最终效果;

以上就是CheckBox控件的用法。