Question

I am using VS2005 C#.

I have a list of users and 2 checkboxes. The checkboxes each indicate Administrator and User. When a user is selected, the respective checkboxes will be checked according to the roles assigned to the user.

Now I am trying to add/remove roles from the selected user by checking/unchecking the checkboxes but I am having some problems. The page reloads for a moment and resets the checkbox status back to the original, and the role is not changed.

Below is my code snippets:

---

<asp:CheckBox ID="adminCB" runat="server" Text="Administrator" OnCheckedChanged="Admin_CC" AutoPostBack="true"/><br />
<asp:CheckBox ID="userCB" runat="server" Text="User" OnCheckedChanged="User_CC" AutoPostBack="true"/>

---

protected void Admin_CC(Object sender, EventArgs e)
{
    if (adminCB.Checked)
    {

        Roles.AddUserToRole(UsersListBox3.SelectedItem.Value, "Administrator");

        // Re-bind users in role to GridView.

        usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value);
        UsersInRoleGrid.DataSource = usersInRole;
        UsersInRoleGrid.DataBind();

    }

    if (adminCB==null)
    {

        Roles.RemoveUserFromRole(UsersListBox3.SelectedItem.Value, "Administrator");

        // Re-bind users in role to GridView.

        usersInRole = Roles.GetUsersInRole(RolesListBox.SelectedItem.Value);
        UsersInRoleGrid.DataSource = usersInRole;
        UsersInRoleGrid.DataBind();

    }
}

Anyone can spot my mistake for me?

Answer 1

Place the check box buttons in an update panel.

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
    <asp:CheckBox ID="adminCB" runat="server" Text="Administrator" OnCheckedChanged="Admin_CC" AutoPostBack="true"/><br />
    <asp:CheckBox ID="userCB" runat="server" Text="User" OnCheckedChanged="User_CC" AutoPostBack="true"/>
    </ContentTemplate>
</asp:UpdatePanel>