C# 强制datalist为的UpdatePanel在数据库更改时刷新-SqlDependency
我正在使用SQLDependency捕获数据库中的更改。 这段代码确实有效。当我在表中更改某些内容时，事件被触发C# 强制datalist为的UpdatePanel在数据库更改时刷新-SqlDependency,c#,asp.net,refresh,updatepanel,sqldependency,C#,Asp.net,Refresh,Updatepanel,Sqldependency,我正在使用SQLDependency捕获数据库中的更改。 这段代码确实有效。当我在表中更改某些内容时，事件被触发 private void RefreshWithSqlDependency() { iquery = from order in context.Order where order.Client.Nickname==nickName && order.StatusId!=5
private void RefreshWithSqlDependency()
{
iquery = from order in context.Order
where order.Client.Nickname==nickName && order.StatusId!=5
select new { Id = order.Id, Description = order.Description, OrderStatus = order.Status.Name };
notification = new ImmediateNotificationRegister<Order>(context, iquery);
notification.OnChanged += NotificationOnChanged;
}
protected void NotificationOnChanged(object sender, EventArgs e)
{
BindOrderDataList(); //this is executed
}
DatalistUpdatePanel <asp:UpdatePanel ID="UpdatePanelOrdersList" runat="server" UpdateMode="Conditional" OnLoad="UpdatePanelOrdersList_Load">
<ContentTemplate>
<asp:DataList ID="DataListOrders" runat="server" RepeatDirection="Horizontal" RepeatColumns="5" OnItemDataBound="DataListOrders_ItemDataBound"
CellPadding="5" Width="100%" OnItemCommand="DataListOrders_ItemCommand" EnableViewState="False">
<ItemStyle Wrap="True" HorizontalAlign="Center" VerticalAlign="Top"></ItemStyle>
<ItemTemplate>
<asp:Panel ID="Order" runat="server">
<div style="padding: 3px; border: 3px solid; border-color: #F0F0F0">
<h4>Order
<asp:Label ID="OrderId" runat="server" Text='<%# Eval("Id") %>'></asp:Label></h4>
<h5>Desc:
<asp:Label ID="Description" runat="server" Text='<%# Eval("Description") %>'></asp:Label></h5>
<h5>Status:
<asp:Label ID="OrderStatus" runat="server" Text='<%# Eval("OrderStatus") %>'></asp:Label></h5>
<br />
<asp:DataList ID="DataListOrderProducts" runat="server" RepeatDirection="Vertical" RepeatColumns="1"
OnItemDataBound="DataListOrderProducts_ItemDataBound" OnItemCommand="DataListOrderProducts_ItemCommand"
EnableViewState="False">
<ItemStyle Wrap="True"></ItemStyle>
<ItemTemplate>
<asp:Panel ID="OrderItem" runat="server">
<h6>Product:
<asp:Label ID="OrderProductId" runat="server" Text='<%# Eval("LineId") %>' CssClass="hiddencol"></asp:Label></h6>
<h6>Product:
<asp:Label ID="Product" runat="server" Text='<%# Eval("ProductName") %>'></asp:Label></h6>
<h6>Status:
<asp:Label ID="ProductStatus" runat="server" Text='<%# Eval("ProductStatus") %>'></asp:Label></h6>
<asp:LinkButton ID="ItemSubmit" runat="server" CommandName="ItemCompleted" Text="Complete" Visible="False" />
</asp:Panel>
</ItemTemplate>
</asp:DataList>
<asp:LinkButton ID="OrderSubmit" runat="server" CommandName="OrderCompleted" Text="Complete" Visible="false" />
</div>
</asp:Panel>
</ItemTemplate>
</asp:DataList>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="NotificationOnChanged" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="DataListOrders" EventName="DataBinding" />
<asp:AsyncPostBackTrigger ControlID="DataListOrders" />
<asp:AsyncPostBackTrigger ControlID="Button1" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
但是没有成功…您可以尝试使用计时器控制。 以下是示例：
希望有此帮助。SQLDependency的事件无法更新updatepanel的内容。您必须使用其他事件触发器（如计时器）触发更新事件。如果计时器滴答作响，则updatepanel更新内容。将更新数据列表代码放入计时器事件。我就是这样使用它的。我需要使用SQLDependency，而不是timer。
<asp:UpdatePanel ID="UpdatePanelOrdersList" runat="server" UpdateMode="Conditional" OnLoad="UpdatePanelOrdersList_Load">
<ContentTemplate>
<asp:DataList ID="DataListOrders" runat="server" RepeatDirection="Horizontal" RepeatColumns="5" OnItemDataBound="DataListOrders_ItemDataBound"
CellPadding="5" Width="100%" OnItemCommand="DataListOrders_ItemCommand" EnableViewState="False">
<ItemStyle Wrap="True" HorizontalAlign="Center" VerticalAlign="Top"></ItemStyle>
<ItemTemplate>
<asp:Panel ID="Order" runat="server">
<div style="padding: 3px; border: 3px solid; border-color: #F0F0F0">
<h4>Order
<asp:Label ID="OrderId" runat="server" Text='<%# Eval("Id") %>'></asp:Label></h4>
<h5>Desc:
<asp:Label ID="Description" runat="server" Text='<%# Eval("Description") %>'></asp:Label></h5>
<h5>Status:
<asp:Label ID="OrderStatus" runat="server" Text='<%# Eval("OrderStatus") %>'></asp:Label></h5>
<br />
<asp:DataList ID="DataListOrderProducts" runat="server" RepeatDirection="Vertical" RepeatColumns="1"
OnItemDataBound="DataListOrderProducts_ItemDataBound" OnItemCommand="DataListOrderProducts_ItemCommand"
EnableViewState="False">
<ItemStyle Wrap="True"></ItemStyle>
<ItemTemplate>
<asp:Panel ID="OrderItem" runat="server">
<h6>Product:
<asp:Label ID="OrderProductId" runat="server" Text='<%# Eval("LineId") %>' CssClass="hiddencol"></asp:Label></h6>
<h6>Product:
<asp:Label ID="Product" runat="server" Text='<%# Eval("ProductName") %>'></asp:Label></h6>
<h6>Status:
<asp:Label ID="ProductStatus" runat="server" Text='<%# Eval("ProductStatus") %>'></asp:Label></h6>
<asp:LinkButton ID="ItemSubmit" runat="server" CommandName="ItemCompleted" Text="Complete" Visible="False" />
</asp:Panel>
</ItemTemplate>
</asp:DataList>
<asp:LinkButton ID="OrderSubmit" runat="server" CommandName="OrderCompleted" Text="Complete" Visible="false" />
</div>
</asp:Panel>
</ItemTemplate>
</asp:DataList>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="NotificationOnChanged" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="DataListOrders" EventName="DataBinding" />
<asp:AsyncPostBackTrigger ControlID="DataListOrders" />
<asp:AsyncPostBackTrigger ControlID="Button1" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
protected void NotificationOnChanged(object sender, EventArgs e)
{
BindOrderDataList();
LongTimeTask_Delegate d = new LongTimeTask_Delegate(LongTimeTask);
IAsyncResult r = d.BeginInvoke("String", new AsyncCallback(TaskCompleted), null);
d.EndInvoke(r);
}
public delegate void LongTimeTask_Delegate(string str);
public void LongTimeTask(string str)
{
Thread.Sleep(50);
}
public void TaskCompleted(IAsyncResult r)
{
UpdatePanelOrdersList.Update();
}