用户仅被添加到1个角色（asp.net成员资格）

Question

我试图允许用户从包含所有角色的下拉列表中选择createuserwizard上的角色。 我没有收到错误，但无论选择哪个下拉列表项，用户总是添加到“发布室”角色。

码：

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        roleDropDownList = RegisterUser.CreateUserStep.ContentTemplateContainer.FindControl("RoleDropDownList")
        roleDropDownList.DataSource = Roles.GetAllRoles()
        roleDropDownList.DataBind()
    End Sub

    Protected Sub RegisterUser_CreatedUser(ByVal sender As Object, ByVal e As EventArgs) Handles RegisterUser.CreatedUser         
        Roles.AddUserToRole(RegisterUser.UserName, roleDropDownList.SelectedValue)         
    End Sub

标记：

<asp:DropDownList ID="RoleDropDownList" runat="server">

                                </asp:DropDownList>

HTML：

<option value="Offering Rooms">Offering Rooms</option>
<option value="Seeking Rooms">Seeking Rooms</option>

Answer 1

您需要添加检查是否回发并且不再绑定：

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
     If Not IsPostBack Then        
        roleDropDownList = RegisterUser.CreateUserStep.ContentTemplateContainer.FindControl("RoleDropDownList")
        roleDropDownList.DataSource = Roles.GetAllRoles()
        roleDropDownList.DataBind()
     End If
End Sub