CheckBox、RadioButton元件在visual studio的工具列也是常客

一、
先介紹winform的CheckBox、RadioButton元件：

加入工具箱的group box後，排版變得整齊乾淨

winform的元件都是以.checked作為是否勾選判斷。
以下是範例，至於MessageBox.Show()是回傳近似alert的元件

        private void button3_Click(object sender, EventArgs e)
        {
            string result = "已勾選項目：";
            if(checkBox1.Checked == true)
            {
                result += " checkBox1 ";
            }
            if (checkBox2.Checked == true)
            {
                result += " checkBox2 ";
            }
            if (radioButton1.Checked == true)
            {
                result += " radioButton1 ";
            }
            if (radioButton2.Checked == true)
            {
                result += " radioButton2 ";
            }
            MessageBox.Show(result);
        }

以下是執行結果

二、網頁版本
仿照前述的做法：

    <form id="form1" runat="server">
        <div>
            <asp:RadioButton ID="RadioButton1" runat="server" Text="checkbox1" />
            <asp:CheckBox ID="CheckBox1" runat="server" Text="CheckBox1" />
            <br />
            <asp:RadioButton ID="RadioButton2" runat="server" Text="checkbox2" />
            <asp:CheckBox ID="CheckBox2" runat="server" Text="CheckBox2" />
        </div>
        <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
    </form>

後端程式碼：

 string result = "已勾選項目：";
            if (CheckBox1.Checked == true)
            {
                result += " checkBox1 ";
            }
            if (CheckBox2.Checked == true)
            {
                result += " checkBox2 ";
            }
            if (RadioButton1.Checked == true)
            {
                result += " radioButton1 ";
            }
            if (RadioButton2.Checked == true)
            {
                result += " radioButton2 ";
            }
            Page.ClientScript.RegisterStartupScript(this.GetType(), "message", "<script language='javascript' defer> alert('"+ result + "'); </script>");

Page.ClientScript.RegisterStartupScript是將後端回傳回js前端的語法
以下同樣是回傳點選項目，