我有一个在更新面板内部使用的用户控件。
UserControl是一个相当简单的表单,它通过ModalPopupExtender(也是UserControl的一部分)显示。有四个DropDownList,以及其他一些UI元素。
四个DropDownlist中有三个的autopostback=“true”,其中selectedIndexChanged事件会在服务器上触发,并导致其他DropDownlist中的一些重新绑定。
AutoPostback的三个DDL中有两个工作正常。其中一个,我刚补充说,是表现出一些奇怪的行为。
假设我将五个项目绑定在它上面:1,2,3,4,5。我将selectedIndex设置为0,这使1成为所选项目。
如果我选择5,然后选择1,继续来回切换,一切都会正常工作。发生回发并选择了DexChanged激发。每一次。
如果我选择2或4,将发生回发,但SelectedIndexChanged不会触发。每一次。
如果我选择3,会发生一些奇怪的事情,有时DDL的值会恢复为1。尽管断点似乎显示它没有重新绑定,也没有运行意外代码。我知道你的第一反应可能是我对重新绑定的代码没有运行是错误的,但是我已经盯着调试器好几个小时了,试图找出我的错误。很多断点。我不明白——这真的没那么复杂。
但很明显我错过了什么。
到目前为止,我已经花了四个小时的时间,我想我只是在磨磨蹭蹭。我可以用另一种观点。
HTML(顺便说一下,
DropProtocolCycleID
是问题控制):
<asp:Panel ID="PanelPopupAssign" runat="server" Style="display:none; cursor: move; width:325px; background-color:Transparent;">
<BlueUI:Panel runat="server" ID="PanelPatientProtocol" Width="500px" HeaderText="Assign Protocol">
<table cellspacing="5">
<tr>
<td style="width:150px;"></td>
<td style="width:50px;"></td>
<td style="width:125px;"></td>
</tr>
<tr runat="server" id="TableRowCategory">
<td align="right">Category:</td>
<td colspan="2">
<asp:DropDownList runat="server" ID="DropProtocolCategories" CausesValidation="false" autopostback="true"/>
</td>
</tr>
<tr>
<td align="right">Protocol:</td>
<td colspan="2">
<asp:DropDownList ID="DropProtocolID" runat="server" Enabled="false" CausesValidation="false" autopostback="true"/>
<asp:Label ID="LabelProtocolName_SetDate" runat="server" />
</td>
</tr>
<tr>
<td colspan="3">
<table style="margin-left: 120px">
<tr>
<td align="right">Cycle:</td>
<td><asp:DropDownList ID="DropProtocolCycleID" runat="server" autopostback="true" /></td>
</tr>
<tr>
<td align="right">Day:</td>
<td>
<asp:DropDownList ID="DropProtocolCycleDayID" runat="server" Enabled="false" />
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td align="right">Start Date:</td>
<td colspan="2">
<table>
<tr>
<td>
<asp:Textbox ID="TextProtocolStartDate" runat="server" Width="65px"
BackColor="Transparent" BorderStyle="None" ReadOnly="True" Font-Size="11px"
ForeColor="#1C4071" Font-Names="Verdana" ValidationGroup="AssignProtocol" />
</td>
<td>
<img id="ImageProtocolStartDate"
alt="Calendar"
onclick="CalProtocolStartDate.show();"
class="calendar_button"
src="../../Images/Icons/btn_calendar.gif"
width="25"
height="22" />
<asp:RequiredFieldValidator ID="ValRequiredProtocolStartDate" runat="server" display="Dynamic"
ControlToValidate="TextProtocolStartDate" ErrorMessage="Protocol Start Date is required!"
InitialValue="(None)"
Enabled="false" ValidationGroup="AssignProtocol">*</asp:RequiredFieldValidator>
</td>
</tr>
</table>
</td>
</tr>
</table>
<ComponentArt:Calendar runat="server"
id="CalProtocolStartDate"
AllowMonthSelection="false"
AllowMultipleSelection="false"
AllowWeekSelection="false"
CalendarCssClass="calendar"
TitleCssClass="title"
ControlType="Calendar"
DayCssClass="day"
DayHeaderCssClass="dayheader"
DayHoverCssClass="dayhover"
DayNameFormat="FirstTwoLetters"
ImagesBaseUrl="~/Images/Calendar/"
MonthCssClass="month"
NextImageUrl="cal_nextMonth.gif"
NextPrevCssClass="nextprev"
OtherMonthDayCssClass="othermonthday"
PopUp="Custom"
PopUpExpandControlId="ImageProtocolStartDate"
PrevImageUrl="cal_prevMonth.gif"
SelectedDate=""
VisibleDate=""
SelectedDayCssClass="selectedday"
SelectMonthCssClass="selector"
SelectMonthText="¤"
SelectWeekCssClass="selector"
SelectWeekText="»"
SwapDuration="300"
SwapSlide="Linear"
AutoPostBackOnSelectionChanged="False"
PopUpCollapseDuration="0"
ClientSideOnSelectionChanged="onCalProtocolStartDateChange">
<ClientEvents>
<Load EventHandler="Calendar1_onLoad" />
</ClientEvents>
</ComponentArt:Calendar>
<br />
<div style="text-align:center;">
<asp:Button ID="ButtonSaveProtocol" runat="server" Text="Save" ValidationGroup="AssignProtocol" Enabled="false" />
<asp:Button ID="ButtonCancel" runat="server" Text="Cancel" CausesValidation="false" />
</div>
<br />
</BlueUI:Panel>
</asp:Panel>
<ajaxToolkit:ModalPopupExtender id="ModalPopupExtenderAssignProtocol" runat="server"
popupcontrolid="PanelPopupAssign" popupdraghandlecontrolid="PanelPopupAssign" CancelControlID="ButtonCancel"
targetcontrolid="ButtonAssignProtocol" BackgroundCssClass="modalBackground" RepositionMode="RepositionOnWindowResizeAndScroll" >
</ajaxToolkit:ModalPopupExtender>
相关代码隐藏:
Private Sub DropProtocolCycleID_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DropProtocolCycleID.SelectedIndexChanged
Me.Show()
Me.SetupDropProtocolCycleDayID()
End Sub
Public Sub Show()
Me.ModalPopupExtenderAssignProtocol.Show()
End Sub
这是我绑定DropProtocolCycleID的代码,如果您感兴趣的话。它在DropProtocolid的SelectedIndexChanged事件中触发,实际工作可靠:
Private Sub SetupDropProtocolCycleID()
If Me.DropProtocolID.SelectedValue = Constants.NothingSelected Then
Me.DropProtocolCycleID.Enabled = False
Exit Sub
Else
Me.DropProtocolCycleID.Enabled = True
End If
Dim ProtocolID As Integer = Me.DropProtocolID.SelectedValue
Dim ProtocolCycles As DataTable = ProtocolManager.GenerateCycleTable(ProtocolID)
Me.DropProtocolCycleID.DataSource = ProtocolCycles
Me.DropProtocolCycleID.DataTextField = "ProtocolCycleNumber"
Me.DropProtocolCycleID.DataValueField = "ProtocolCycleID"
Me.DropProtocolCycleID.DataBind()
If DropProtocolCycleID.Items.Count > 0 Then
Me.DropProtocolCycleID.SelectedIndex = 0
End If
End Sub
原菌落数和原菌落数只是整数。没有任何可能干扰javascript的地方。
