我们在 dhtmlxScheduler 中的自定义灯箱有问题，因为在您的示例中您使用了 HTML 控制器。我们可以在我们的自定义灯箱中使用服务器端控制器吗？顺便说一下，您是否将自定义表单放在用户控制器中
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="uc_taskFrom.ascx.cs" Inherits="Compudata_ProjectManager.userController.uc_taskFrom" %>
<div>
<!-- begin of Content Create TaskForm -->
<!-- Script manager-->
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<!-- Validation Summary msg vs_TaskForm-->
<asp:ValidationSummary ID="vs_TaskForm" runat="server" ForeColor="#CC0000" />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<!-- begin of Content Create TaskForm -->
<asp:Panel ID="Panel1" runat="server" GroupingText="Create New Task">
<table>
<tr>
<td>
<label>
Project:</label>
</td>
<td>
<asp:DropDownList ID="ddl_projectsList" runat="server" DataSourceID="SqlDataSourceProjectList"
DataTextField="projectName" DataValueField="projectID" AppendDataBoundItems="True"
OnSelectedIndexChanged="ddl_projectsList_SelectedIndexChanged" AutoPostBack="True">
<asp:ListItem Value="-1">Select Project</asp:ListItem>
</asp:DropDownList>
<asp:CompareValidator ID="cv_projectList" runat="server" ControlToValidate="ddl_projectsList"
ErrorMessage="Select Project" ForeColor="#FC0000" Operator="NotEqual" ValueToCompare="-1">*</asp:CompareValidator>
<asp:SqlDataSource ID="SqlDataSourceProjectList" runat="server" ConnectionString="<%$ ConnectionStrings:Compudata_ProjectManagerConnection %>"
SelectCommand="SELECT [projectID], [projectName] FROM [Projects] ORDER BY [projectName]">
</asp:SqlDataSource>
</td>
</tr>
<tr>
<td>
<label>
Task Name:</label><em>*</em>
</td>
<td>
<asp:TextBox ID="txtb_taskName" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfv_taskName" runat="server" ControlToValidate="txtb_taskName"
ErrorMessage="Enter Task Name" ForeColor="#F60000">*</asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td>
Default Tech:
</td>
<td>
<asp:Literal ID="lit_dafaultTech" runat="server"></asp:Literal>
</td>
</tr>
<tr>
<td>
<label>
Assigned To :</label><em>*</em>
</td>
<td>
<asp:DropDownList ID="ddl_usersList" runat="server" AppendDataBoundItems="True" DataSourceID="SqlDataSourceUserList"
DataTextField="UserName" DataValueField="UserId">
</asp:DropDownList>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="ddl_usersList"
CssClass="Validator" ErrorMessage="select Tech" InitialValue="-1">*</asp:RequiredFieldValidator>
<asp:SqlDataSource ID="SqlDataSourceUserList" runat="server" ConnectionString="<%$ ConnectionStrings:Compudata_ProjectManagerConnection %>"
SelectCommand="SELECT [UserId], [UserName] FROM [vw_aspnet_Users]"></asp:SqlDataSource>
</td>
</tr>
<tr>
<td>
<label>
Status :</label><em>*</em>
</td>
<td>
<asp:DropDownList ID="ddl_status" runat="server" AppendDataBoundItems="True">
</asp:DropDownList>
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="ddl_status"
ErrorMessage="select Status" InitialValue="-1" CssClass="Validator">*</asp:RequiredFieldValidator>
<asp:SqlDataSource ID="status_sqlDS" runat="server" ConnectionString="<%$ ConnectionStrings:Compudata_ProjectManagerConnection %>"
SelectCommand="GetAllStatus" SelectCommandType="StoredProcedure"></asp:SqlDataSource>
</td>
</tr>
<tr>
<td>
<label>
Priorty:</label><em>*</em>
</td>
<td>
<asp:DropDownList ID="ddl_priority" runat="server" AppendDataBoundItems="True">
</asp:DropDownList>
<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ControlToValidate="ddl_priority"
ErrorMessage="Select one" CssClass="Validator" InitialValue="-1">*</asp:RequiredFieldValidator>
<asp:SqlDataSource ID="priority_sqlDC" runat="server" ConnectionString="<%$ ConnectionStrings:Compudata_ProjectManagerConnection %>"
SelectCommand="GetAllPriority" SelectCommandType="StoredProcedure"></asp:SqlDataSource>
</td>
</tr>
<tr>
<td>
<label>
Estimate Time eg(1.50):</label>
</td>
<td>
<asp:TextBox ID="txtb_estTime" runat="server" Style="direction: ltr"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<label>
Description:</label><em>*</em>
</td>
<td>
<asp:TextBox ID="txtb_Description" runat="server" TextMode="MultiLine"
Width="600px" Height="300px"></asp:TextBox>
</td>
</tr>
<tr>
<td>
</td>
</tr>
<tr>
<td colspan="2">
<label>
Send Email:
</label>
<asp:CheckBox ID="ch_sendEmail" runat="server" Text="Send Email to assigned Tech"
Checked="True" />
</td>
</tr>
<tr>
<td>
<label>Start Date: </label>
</td>
<td>
<asp:TextBox ID="txtb_startDate" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<label>End Date: </label>
</td>
<td>
<asp:TextBox ID="txtb_endDate" runat="server" CssClass=".datetimepicker"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<label>show on Calendar </label>
</td>
<td>
<asp:CheckBox ID="chb_calendar" runat="server" Text="show on Calendar"></asp:CheckBox>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblMessage" runat="server"></asp:Label>
</td>
<td>
<asp:Button ID="btn_createTask" runat="server" Text="Create Task" OnClick="createTask_Click" />
<asp:Button ID="Button2" runat="server" Text="Cancel" />
</td>
</tr>
</table>
<br />
<!-- begin of Web template option -->
<table class="style1">
<tr>
<td>
<asp:LinkButton ID="lnkb_clientRMA" runat="server"
onclick="lnkb_clientRMA_Click"
>CLIENT RMA RETURN</asp:LinkButton> </td>
<td>
<asp:LinkButton ID="lnkb_LG_SERVICE" runat="server"
onclick="lnkb_LG_SERVICE_Click">LG SERVICE</asp:LinkButton> </td>
<td>
<asp:LinkButton ID="lnkb_PHONE_REMOTESUPPORT" runat="server"
onclick="lnkb_PHONE_REMOTESUPPORT_Click">PHONE/REMOTE SUPPORT</asp:LinkButton> </td>
<td>
<asp:LinkButton ID="lnkb_SEAGATE_RMA_RETURN" runat="server"
onclick="lnkb_SEAGATE_RMA_RETURN_Click">SEAGATE RMA RETURN</asp:LinkButton> </td>
<td>
<asp:LinkButton ID="lnkb_ON_SITE_SERVICE" runat="server"
onclick="lnkb_ON_SITE_SERVICE_Click"> ON-SITE SERVICE</asp:LinkButton></td>
<td>
<asp:LinkButton ID="lnkb_ZEISS_RMA_DIAGNOSTIC" runat="server"
onclick="lnkb_ZEISS_RMA_DIAGNOSTIC_Click">ZEISS RMA AND DIAGNOSTIC</asp:LinkButton> </td>
</tr>
<tr>
<td>
<asp:LinkButton ID="lnkb_LENOVO_SERVICE" runat="server"
onclick="lnkb_LENOVO_SERVICE_Click">LENOVO SERVICE</asp:LinkButton></td>
<td>
<asp:LinkButton ID="lnkb_MONTHLY_SERVICE" runat="server"
onclick="lnkb_MONTHLY_SERVICE_Click">MONTHLY SERVICE</asp:LinkButton> </td>
<td>
<asp:LinkButton ID="lnkb_Power_Supply_RMA" runat="server"
onclick="lnkb_Power_Supply_RMA_Click">Power Supply RMA</asp:LinkButton></td>
<td>
<asp:LinkButton ID="lnkb_IN_SHOP_SERVICE" runat="server"
onclick="lnkb_IN_SHOP_SERVICE_Click" >IN-SHOP SERVICE</asp:LinkButton></td>
<td>
<asp:LinkButton ID="lnkb_VENDOR_RMA_RETURN" runat="server"
onclick="lnkb_VENDOR_RMA_RETURN_Click">VENDOR RMA RETURN</asp:LinkButton></td>
<td>
</td>
</tr>
</table>
<!-- end of Web template option -->
</asp:Panel>
<!-- end of Content Create TaskForm -->
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="ddl_projectsList" EventName="SelectedIndexChanged" />
</Triggers>
</asp:UpdatePanel>
</div>