我能够找到所有这些标签和文本框的控件都接受 edateTB。这对我来说很奇怪,因为它与 sdateTB 的观点相同。那么,当我尝试在其上使用 FindControl 并且 sdateTB 返回正确的控件时,为什么 edateTB 返回 NULL 呢?
在此先感谢,这个让我沮丧了一段时间。
这是我收到此错误的代码隐藏。这里面有更多代码,但我只是想我会包括所有内容,直到我得到 NULL 错误的部分。
protected void ReservationDetail_DataBound(object sender, EventArgs e)
{
TextBox idBox = (TextBox)dvReservationDetail.FindControl("tbID");
int id = int.Parse(idBox.Text);
Label specDays = (Label)dvReservationDetail.FindControl("DaysHdr");
Label weekdays = (Label)dvReservationDetail.FindControl("WeekdaysHdr");
ListBox dates = (ListBox)dvReservationDetail.FindControl("DatesList");
Label days = (Label)dvReservationDetail.FindControl("WeekdaysLbl");
Label sdate = (Label)dvReservationDetail.FindControl("startDateLbl");
TextBox sdateTb= (TextBox)dvReservationDetail.FindControl("startDateTB");
Label eDate = (Label)dvReservationDetail.FindControl("endDateLbl");
TextBox edateTB = (TextBox)dvReservationDetail.FindControl("endDateTB");
}
这是标签和文本框所在的详细信息视图。
<asp:DetailsView ID="dvReservationDetail" runat="server" DataSourceID="SqlDetail"
OnDataBound="ReservationDetail_DataBound" CssClass="detailgrid" GridLines="None"
DefaultMode="Edit" AutoGenerateRows="false" Visible="false" Width="100%" OnItemUpdating="ReservationDetail_Updating">
<Fields>
<asp:TemplateField HeaderText="ID">
<EditItemTemplate>
<asp:TextBox ID="tbID" runat="server" Text='<%# Bind("id") %>' ReadOnly="true" />
</EditItemTemplate>
</asp:TemplateField>
<asp:BoundField HeaderText="LabName" DataField="labName" />
<asp:BoundField HeaderText="Class" DataField="class" />
<asp:BoundField HeaderText="Class Size" DataField="classSize" />
<asp:TemplateField HeaderText="Software">
<EditItemTemplate>
<asp:ListBox ID="software" Width="150" runat="server" ReadOnly="true" />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Start Time">
<EditItemTemplate>
<asp:TextBox ID="startTime" runat="server" Text='<%# Bind("startTime") %>' />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="End Time">
<EditItemTemplate>
<asp:TextBox ID="endTime" runat="server" Text='<%# Bind("endTime") %>' />
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
<asp:Label ID="WeekdaysHdr" runat="server" Visible="false" Text="Days Reserved By Week"></asp:Label>
<asp:Label ID="DaysHdr" runat="server" Visible="false" Text="Specific Days Reserved"></asp:Label>
</HeaderTemplate>
<ItemTemplate>
<asp:ListBox ID="DatesList" runat="server" Visible="false"></asp:ListBox>
<asp:Label ID="WeekdaysLbl" runat="server" Text='<%# Bind("Weekday") %>' Visible="false"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
<asp:Label ID="startDateLbl" runat="server" Visible="false" Text="Start Date"></asp:Label></HeaderTemplate>
<ItemTemplate>
<asp:TextBox ID="startDateTB" runat="server" Visible="false" Text="Test"></asp:TextBox></ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<HeaderTemplate>
<asp:Label ID="endDateLbl" runat="server" Visible="false" Text="End Date"></asp:Label></HeaderTemplate>
<ItemTemplate>
<asp:TextBox ID="endDateTB" runat="server" Visible="false" Text=""></asp:TextBox></ItemTemplate>
<ItemTemplate>
<asp:TextBox ID="repeatTypeTB" runat="server" Visible="false" Text='<%# Bind("repeats") %>'></asp:TextBox></ItemTemplate>
</asp:TemplateField>
<%-- <asp:CommandField ShowEditButton="true" />--%>
</Fields>
</asp:DetailsView>