已检查的更改事件未触发

Question

I want to enable and disable textfields on checked change event but this event is not firing. Following is my radio button code

<asp:RadioButton ID="submitter" runat="server" GroupName="rd2" OnCheckedChanged="submitter_CheckedChanged" Text="Submitter" />
                        &nbsp;&nbsp;
        <asp:RadioButton ID="following" runat="server" ForeColor="Black" Text="Following" GroupName="rd2" OnCheckedChanged="following_CheckedChanged" />

Following is my checked change event code

protected void following_CheckedChanged(object sender, EventArgs e)
    {
        if (submitter.Checked == true)
        {
            contactName.Enabled = false;
            Contactmail.Enabled = false;
            Response.Write("<script LANGUAGE='JavaScript' >alert('following event submitter check')</script>");
        }
       if (following.Checked == true)
        {
            contactName.Enabled = true;
            Contactmail.Enabled = true;
            Response.Write("<script LANGUAGE='JavaScript' >alert('following event following check')</script>");
        }
    }

    protected void submitter_CheckedChanged(object sender, EventArgs e)
    {
        if (submitter.Checked == true)
        {
            contactName.Enabled = false;
            Contactmail.Enabled = false;
            Response.Write("<script LANGUAGE='JavaScript' >alert('submitter event submitter check')</script>");
        }
        if (following.Checked == true)
        {
            contactName.Enabled = true;
            Contactmail.Enabled = true;
            Response.Write("<script LANGUAGE='JavaScript' >alert('submitter event following check')</script>");
        }

Please tell me where is problem. thanks

Answer 1

set AutoPostBack="true"

Postback means sending Data to server. It will execute server side events. for more Details Click Here

<asp:RadioButton ID="submitter" runat="server" GroupName="rd2" OnCheckedChanged="submitter_CheckedChanged" Text="Submitter" AutoPostBack="true" />
                        &nbsp;&nbsp;
        <asp:RadioButton ID="following" runat="server" ForeColor="Black" Text="Following" GroupName="rd2" OnCheckedChanged="following_CheckedChanged" AutoPostBack="true" />

Answer 2

You need to add AutoPostBack="true" .

Change the aspx code to as below:

<asp:RadioButton AutoPostBack="true" ID="submitter" runat="server" GroupName="rd2" OnCheckedChanged="submitter_CheckedChanged" Text="Submitter" />
                        &nbsp;&nbsp;
<asp:RadioButton AutoPostBack="true" ID="following" runat="server" ForeColor="Black" Text="Following" GroupName="rd2" OnCheckedChanged="following_CheckedChanged" />