如何防止一个更新面板影响另一个c#asp

我的问题是，当我第一次使用第一个updatepanel的droplist正常工作时，它会显示隐藏的标签和文本框，一切正常

但是，当我首先使用省、州或区时，他们会实施该方法

protected void 
droplistTipoIdentificacionDatosPropietario_SelectedIndexChanged (object sender, EventArgs and )
{
    MessageBox.Show ("hello");
    this.datosPropietarioLblNumIdentificacion.Visible = true;
    this.datosPropietariotxtNumIdentificacion.Visible = true;
}

每一滴都有自己的方法

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {               
        this.datosPropietarioLblNumIdentificacion.Visible = false;
        this.datosPropietariotxtNumIdentificacion.Visible = false;
    }
}

---

您可能存在复制/粘贴问题；有时复制/粘贴不会执行代码。尝试从每个下拉列表中删除代码隐藏方法并重新添加它们

<asp:DropDownList ID="droplistProvincia" 
    AutoPostBack="true" onchange="testProvincia"
    OnSelectedIndexChanged="droplistProvincia_SelectedIndexChanged" <- delete this
    Width="100%" runat="server" Height="30px">
    <asp:ListItem Text="Seleccione"></asp:ListItem>
</asp:DropDownList>

protected void droplistTipoIdentificacionDatosPropietario_SelectedIndexChanged(object sender, EventArgs e)
{
    MessageBox.Show("hola");
    this.datosPropietarioLblNumIdentificacion.Visible = true;
    this.datosPropietariotxtNumIdentificacion.Visible = true;
}

<asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
    <ContentTemplate>
        <div class="grid3">
            <asp:Label runat="server" Text="Provincia"></asp:Label>
            <asp:DropDownList ID="droplistProvincia" 
                AutoPostBack="true" onchange="testProvincia"
                OnSelectedIndexChanged="droplistProvincia_SelectedIndexChanged" 
                Width="100%" runat="server" Height="30px">
                <asp:ListItem Text="Seleccione"></asp:ListItem>
            </asp:DropDownList>
            <asp:Label runat="server" Text="Cantón"></asp:Label>
            <asp:DropDownList ID="droplistCanton" CssClass="item15" 
                AutoPostBack="true" 
                OnSelectedIndexChanged="droplistCanton_SelectedIndexChanged" 
                Width="100%" runat="server" Height="30px">
                <asp:ListItem Text="Seleccione"></asp:ListItem>
            </asp:DropDownList>
            <asp:Label runat="server" CssClass="item16" Text="Distrito"></asp:Label>
            <asp:DropDownList ID="droplistDistrito"
                AutoPostBack="true" 
                OnSelectedIndexChanged="droplistDistrito_SelectedIndexChanged" 
                CssClass="item17"  runat="server" Height="30px">
                <asp:ListItem Text="Seleccione"></asp:ListItem>
            </asp:DropDownList>
        </ContentTemplate>
    </asp:UpdatePanel>

<asp:DropDownList ID="droplistProvincia" 
    AutoPostBack="true" onchange="testProvincia"
    OnSelectedIndexChanged="droplistProvincia_SelectedIndexChanged" <- delete this
    Width="100%" runat="server" Height="30px">
    <asp:ListItem Text="Seleccione"></asp:ListItem>
</asp:DropDownList>