season checkbox

Question

User-1683022223 posted

Hello ,

i would like make a season for checkbox

if i check = true

if unchecked = false

 protected void CheckBox3_CheckedChanged(object sender, EventArgs e)
        {

        }

Answer 1

User-939850651 posted

Hi kankonq8,

The CheckBox in the WebForm has checked attribute to determine whether the CheckBox is selected.

If you want to determine the state of the CheckBox in the CheckedChanged event, you need to add the attribute AutoPostBack="true" to the control.

Something like this:

<form id="form1" runat="server">
        <div>
            <asp:CheckBox Text="spring" ID="CheckBox1" runat="server" OnCheckedChanged="CheckBox3_CheckedChanged" AutoPostBack="true" />
            <br />
            <asp:CheckBox Text="summer" ID="CheckBox2" runat="server" OnCheckedChanged="CheckBox3_CheckedChanged" AutoPostBack="true" />
            <br />
            <asp:CheckBox Text="autumn" ID="CheckBox3" runat="server" OnCheckedChanged="CheckBox3_CheckedChanged" AutoPostBack="true" />
            <br />
            <asp:CheckBox Text="winter" ID="CheckBox4" runat="server" OnCheckedChanged="CheckBox3_CheckedChanged" AutoPostBack="true" />
            <br />
            you have checked：
            <asp:Label ID="resultLabel" runat="server"/>
        </div>
    </form>

protected void CheckBox3_CheckedChanged(object sender, EventArgs e)
        {
            string text = "";

            if (CheckBox1.Checked)
                text += "spring ";
            if (CheckBox2.Checked)
                text += "summer ";
            if (CheckBox3.Checked)
                text += "autumn ";
            if (CheckBox4.Checked)
                text += "winter";

            resultLabel.Text = text;
        }

Result:

Hope this can help you.

Best regards,

Xudong Peng

Answer 2

User-1683022223 posted

i found it

HTML

  <asp:CheckBox ID="CheckBox1" runat="server" OnCheckedChanged="CheckBox1_CheckedChanged" Text="Location" />

C#

 protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
        {

            Session["check_location"] = CheckBox1.Checked;

        }

Second page with session

HTML

 <asp:Label ID="chec_location" runat="server"></asp:Label>

C#

protected void Page_Load(object sender, EventArgs e)
        {
            chec_location.Text = Session["check_location"].ToString();
 if (!this.IsPostBack)
            {

            }
}