Contenttemplate-控件不触发

Question

我如何才能让control模板中的控件事件工作呢？我不能直接访问控件，这已经够烦人的了，但现在事件甚至不会因为某种原因而触发？我开始讨厌网络编程了。

前面：

<act:TabContainer ID="tcTabellen" runat="server" TabIndex="0" AutoPostBack="true">
        <act:TabPanel ID="tpBeitragssaetze" HeaderText="Beitragss&auml;tze" runat="server">
            <ContentTemplate>
                <p>
                    <asp:Label ID="lbKasse" runat="server">Kasse</asp:Label> 
                    <asp:DropDownList runat="server" ID="ddlKasse" AutoPostBack="true"></asp:DropDownList>
                    <asp:Label ID="lbJahr" runat="server">Jahr</asp:Label>
                    <asp:DropDownList runat="server" ID="ddlJahr" AutoPostBack="true"></asp:DropDownList>
                </p>
            </ContentTemplate>
        </act:TabPanel>
</act:TabContainer> 

后面：

WithEvents ddlKasse As DropDownList
WithEvents ddlJahr As DropDownList

Private Sub ddlKasse_DataBind()
        ddlKasse = CType(Me.tcTabellen.FindControl("tpBeitragssaetze").FindControl("ddlKasse"), DropDownList)
        ddlKasse.AutoPostBack = True

        ddlKasse.Items.Clear()

        ddlKasse.Items.Insert(0, New ListItem With {.Text = "Bitte auswählen ...", .Value = "0"})
        ddlKasse.Items.Insert(1, New ListItem With {.Text = "01 - BKK Höchst (W)", .Value = "01"})
        ddlKasse.Items.Insert(2, New ListItem With {.Text = "02 - BKK Höchst (O)", .Value = "02"})
        ddlKasse.Items.Insert(3, New ListItem With {.Text = "10 - BKK Gesundheit (Alt) (W)", .Value = "10"})
        ddlKasse.Items.Insert(4, New ListItem With {.Text = "13 - Sancura BKK (W)", .Value = "13"})
        ddlKasse.Items.Insert(5, New ListItem With {.Text = "21 - DKV (W)", .Value = "21"})
        ddlKasse.Items.Insert(6, New ListItem With {.Text = "22 - DKV (O)", .Value = "22"})
        ddlKasse.Items.Insert(7, New ListItem With {.Text = "32 - BKK Vita-Dyckerhoff (W)", .Value = "32"})
        ddlKasse.Items.Insert(8, New ListItem With {.Text = "34 - BKK Gesundheit (W)", .Value = "34"})
        ddlKasse.Items.Insert(9, New ListItem With {.Text = "35 - BKK Gesundheit (O)", .Value = "35"})
        ddlKasse.Items.Insert(10, New ListItem With {.Text = "56 - STJB (W)", .Value = "56"})
        ddlKasse.Items.Insert(11, New ListItem With {.Text = "69 - BKK Bodensee + Südwest (W)", .Value = "69"})
        ddlKasse.Items.Insert(12, New ListItem With {.Text = "71 - STJB (O)", .Value = "71"})
        ddlKasse.Items.Insert(13, New ListItem With {.Text = "82 - BKK Vita Dyckerhoff (O)", .Value = "82"})
        ddlKasse.Items.Insert(14, New ListItem With {.Text = "83 - BKK Gesundheit (Alt) (O)", .Value = "83"})
        ddlKasse.Items.Insert(15, New ListItem With {.Text = "84 - Sankura BKK (O)", .Value = "84"})
        ddlKasse.Items.Insert(16, New ListItem With {.Text = "93 - BKK FPB Holding (W)", .Value = "93"})
    End Sub

Private Sub ddlKasse_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ddlKasse.SelectedIndexChanged
        ddlJahr_DataBind()
End Sub

我只想在一个ddl的selectedindex发生变化时填充另一个ddl，但正如我前面提到的..该事件不会触发。有没有人知道它是什么样子的，以及我如何修复它？

提前感谢！

Answer 1

您的ddl需要在其标记上使用onselectedindexchanged：

<asp:DropDownList runat="server" ID="ddlKasse" onselectedindexchanged="ddlKasse_SelectedIndexChanged" AutoPostBack="true"></asp:DropDownList>