我创建了一个包含gridview 的asp.net 网页。我通过gridview 控件从工具箱(而不是代码)拖放时提供的步骤将gridview 绑定到访问数据库。这个页面实际上是在服务器中。当我在客户端(在另一个网页中)进行更新时(例如:添加或删除数据库中的记录),gridview 不会反映更改,尽管数据库中的值已更改。只有当我在服务器中刷新时,才会在客户端看到更改。请帮忙。
问问题
817 次
3 回答
1
您可以使用asp.net ajax 计时器控件定期刷新页面/页面的一部分。以下示例显示您可以每 5 秒更新一次服务器时间。同样,您将更新GridView
.
HTML
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:Timer runat="server" id="UpdateTimer" interval="5000" ontick="UpdateTimer_Tick" />
<asp:UpdatePanel runat="server" id="TimedPanel" updatemode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger controlid="UpdateTimer" eventname="Tick" />
</Triggers>
<ContentTemplate>
<asp:Label runat="server" id="DateStampLabel" />
</ContentTemplate>
</asp:UpdatePanel>
背后的代码
protected void UpdateTimer_Tick(object sender, EventArgs e)
{
DateStampLabel.Text = DateTime.Now.ToString();
}
于 2013-07-26T03:14:34.267 回答
1
于 2013-07-26T04:03:07.657 回答
0
谢谢大家。下面的代码对我有用:
页面:
<asp:Panel ID="Panel2" runat="server" Height="146px" Style="z-index: 100; left: 382px;
position: absolute; top: 247px" Visible="true" Width="235px">
<asp:Label ID="deptlabel" runat="server"
style="z-index: 1; left: 0px; top: 33px; position: absolute" Text="Label"
Visible="False"></asp:Label>
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataSourceID="SqlDataSource1" Style="z-index: 100; left: -146px;
position: absolute; top: 216px; height: 374px; width: 1024px;" AllowSorting="True"
CellPadding="3" AllowPaging="True" BackColor="#DEBA84" BorderColor="#DEBA84"
BorderStyle="None" BorderWidth="1px" CellSpacing="2">
<Columns>
<asp:TemplateField HeaderText="Delete">
<ItemTemplate>
<asp:CheckBox ID="chkDelete" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="bid" HeaderText="bid"
SortExpression="bid" />
<asp:BoundField DataField="did" HeaderText="did" SortExpression="did" />
<asp:BoundField DataField="bname" HeaderText="bnme"
SortExpression="bname" />
<asp:BoundField DataField="author" HeaderText="athr"
SortExpression="author" />
<asp:BoundField DataField="price" HeaderText="cost"
SortExpression="price" />
<asp:BoundField DataField="edition" HeaderText="editn"
SortExpression="edition" />
<asp:BoundField DataField="category" HeaderText="ctgry"
SortExpression="category" />
<asp:BoundField DataField="publisher" HeaderText="publsr"
SortExpression="publisher" />
<asp:BoundField DataField="status" HeaderText="stat"
SortExpression="status" />
<asp:BoundField DataField="acpr" HeaderText="acpr" SortExpression="acpr" />
<asp:BoundField DataField="volume" HeaderText="vol"
SortExpression="volume" />
<asp:BoundField DataField="ref" HeaderText="ref" SortExpression="ref" />
<asp:BoundField DataField="pages" HeaderText="pgs" SortExpression="pages" />
</Columns>
<RowStyle BackColor="#FFF7E7" ForeColor="#8C4510" />
<FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />
<PagerStyle ForeColor="#8C4510" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />
</asp:GridView>
</ContentTemplate>
</asp:UpdatePanel>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:con %>"
SelectCommand="SELECT DISTINCT * FROM [books] WHERE ([bid] LIKE '%' + @bid + '%')">
<SelectParameters>
<asp:ControlParameter ControlID="deptlabel" Name="bid" PropertyName="Text"
Type="String" />
</SelectParameters> </asp:SqlDataSource>
</asp:Panel>
<asp:Label ID="Label9" runat="server" Font-Size="XX-Large" ForeColor="#C04000" Style="z-index: 102;
left: 492px; position: absolute; top: 256px; width: 678px;"
Text="BOOKS REMOVE"></asp:Label>
默认.aspx.cs:
protected void Timer1_Tick(对象发送者,EventArgs e){
GridView1.DataBind();
}
于 2013-08-02T15:27:42.027 回答