I created these DropDownList
s:
我创建了这些DropDownLists:
<asp:DropDownList CssClass="ComboBoxes" ID="UserComboBox" runat="server" OnSelectedIndexChanged="UserComboBoxSelected"/>
<asp:DropDownList CssClass="ComboBoxes" ID="ShiftComboBox" runat="server"/>
I have this in the code-behind:
我在代码隐藏中有这个:
protected void UserComboBoxSelected(object sender, EventArgs e)
{
// ...
}
However, it never fires when I select items in UserComboBox
. What am I doing wrong?
但是,当我在UserComboBox中选择项目时,它永远不会触发。我究竟做错了什么?
2 个解决方案
#1
4
You have to set [AutoPostBack][1]
to true for firing event on server side code behind file.
您必须将[AutoPostBack] [1]设置为true才能在文件后面的服务器端代码上触发事件。
<asp:DropDownList CssClass="ComboBoxes" ID="UserComboBox" runat="server" AutoPostBack="true" OnSelectedIndexChanged="UserComboBoxSelected"/>
Gets or sets a value indicating whether a postback to the server automatically occurs when the user changes the list selection, MSDN.
获取或设置一个值,该值指示当用户更改列表选择MSDN时是否自动发生到服务器的回发。
#2
1
<asp:DropDownList
CssClass="ComboBoxes"
ID="UserComboBox"
runat="server"
OnSelectedIndexChanged="UserComboBoxSelected"
AutoPostBack="true" />
#1
4
You have to set [AutoPostBack][1]
to true for firing event on server side code behind file.
您必须将[AutoPostBack] [1]设置为true才能在文件后面的服务器端代码上触发事件。
<asp:DropDownList CssClass="ComboBoxes" ID="UserComboBox" runat="server" AutoPostBack="true" OnSelectedIndexChanged="UserComboBoxSelected"/>
Gets or sets a value indicating whether a postback to the server automatically occurs when the user changes the list selection, MSDN.
获取或设置一个值,该值指示当用户更改列表选择MSDN时是否自动发生到服务器的回发。
#2
1
<asp:DropDownList
CssClass="ComboBoxes"
ID="UserComboBox"
runat="server"
OnSelectedIndexChanged="UserComboBoxSelected"
AutoPostBack="true" />