[英]DropDown not firing OnSelectedIndexChanged
我有一個帶下拉列表的頁面
<asp:Content runat="server" ContentPlaceHolderID="ContentPlaceHolder1">
<asp:DropDownList ID="DropDownList1" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
<asp:ListItem>Cellsite</asp:ListItem>
<asp:ListItem>Agreement</asp:ListItem>
<asp:ListItem>Event</asp:ListItem>
<asp:ListItem>User</asp:ListItem>
</asp:DropDownList>
<asp:Label runat="server" ID="EntityName"></asp:Label>
<ig:WebScriptManager ID="WebScriptManager1" runat="server"></ig:WebScriptManager>
<ig:WebDataGrid ID="EntityGrid" runat="server" Width="100%">
<Behaviors>
<ig:Sorting>
</ig:Sorting>
</Behaviors>
</ig:WebDataGrid>
代碼背后是
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
EntityName.Text = DropDownList1.SelectedItem.Text;
}
對於某些原因,標簽永遠不會更新,selectindexchanged的事件根本不會觸發我需要在此事件中添加動態網格。 任何線索?
您需要在下拉列表中添加AutoPostBack
<asp:DropDownList ID="DropDownList1" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" AutoPostBack="true">
實際上,當您沒有AutoPostBack = true屬性時,您可以確定沒有回發帖子。
set dropdownlist屬性AutoPostBack =“true”
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
<asp:ListItem>Cellsite</asp:ListItem>
<asp:ListItem>Agreement</asp:ListItem>
<asp:ListItem>Event</asp:ListItem>
<asp:ListItem>User</asp:ListItem>
</asp:DropDownList>
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