Question

我正在开发一个网络应用程序，我在网络表单中使用vb.net代码只加载我的控件中的设置一次。但我正在使用谷歌地图控件，每次我的计时器运行该控件重新加载它设置并消除我推入的任何数据。我想我需要一些帮助在asp.net/html方面停止回帖重新加载控制。

这是我的asp.net/html代码。

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<table style="width:100%;">
    <tr>
        <td style="width: 668px">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>




<artem:GoogleMap ID="GoogleMap1" runat="server"

    DefaultAddress="999 main st, new york NY, 10541" 
    EnableMapTypeControl="True" EnableOverviewMapControl="False" 
    EnableReverseGeocoding="True" EnableStreetViewControl="False" MapType="Roadmap" 
    MaxZoom="25" MinZoom="12" ShowTraffic="False" Zoom="18" Height="380px" 
    Width="550px" Key="13123123132132132132132123" >
</artem:GoogleMap>
<br />
        </td>
        <td>
            <asp:Button ID="Button1" runat="server" Text="Button" />
            <br />
            <br />

        </td>

    </tr>
  <tr>
  <td style="width: 668px">
  <asp:GridView ID="GridView1" runat="server">
            </asp:GridView>
      <asp:Timer ID="tmUpdateAlarms" runat="server" Enabled="False" Interval="30000">
      </asp:Timer>
  </td>
  </tr>
</table>

我的定时器代码

 Protected Sub tmUpdateAlarms_Tick(sender As Object, e As System.EventArgs) Handles tmUpdateAlarms.Tick
    tmUpdateAlarms.Enabled = False
    Try
        Dim lqFireFighterconnect As New lqFireFighterConnectDataContext
        Dim lqGetAlarms As New lqAlarmAndGoDataContext
        Dim getDeptGUID = From r In lqFireFighterconnect.tbDeptToPublics
                          Where r.PublicGUID = Request.QueryString("PUBGUID")
                          Select r
        If getDeptGUID.Count = 0 Then
            Exit Sub
        End If
        For Each foundGUID In getDeptGUID.Take(1)
            gotDeptGUID = foundGUID.DeptGUID
        Next
        Dim GetAlarms = From r In lqGetAlarms.AlarmDrops
                            Where r.DeptGUID = gotDeptGUID
                            Order By r.TimeDate Descending
                            Select r
        If GetAlarms.Count = 0 Then
            Exit Sub
        End If
        Dim myCBTable As New DataTable()
        With myCBTable.Columns
            .Add("DateTime", GetType(String))
            .Add("Address", GetType(String))
            .Add("AlarmType", GetType(String))
            .Add("CrossStreet", GetType(String))
            .Add("Status", GetType(String)) '<<<< change the type of this column to what you actually need instead of integer.
        End With
        For Each FoundAlarm In GetAlarms.Take(1)
            If Not GridView1.Rows(0).Cells(1).Text.ToString = FoundAlarm.AlarmAddress Then
                For Each updateAlarm In GetAlarms.Take(3)
                    myCBTable.Rows.Add(updateAlarm.TimeDate.ToString, updateAlarm.AlarmAddress, updateAlarm.AlarmType, updateAlarm.AlarmCrossStreets, updateAlarm.AlarmStatus)
                Next
                With GridView1
                    .DataSource = myCBTable
                    .DataBind()
                End With
                Dim objmar As New Artem.Google.UI.Marker
                objmar.Address = GridView1.Rows(0).Cells(1).Text.ToString
                'objmar.Animation = Artem.Google.UI.MarkerAnimation.Drop
                objmar.Visible = True
                objmar.Title = GridView1.Rows(0).Cells(1).Text.ToString
                objmar.Icon = "/Images/fire_c.png"
                GoogleMap1.Markers.Add(objmar)
                objmar = Nothing
                GoogleMap1.Address = GridView1.Rows(0).Cells(1).Text.ToString
            End If
        Next

        '  LoadHydrants()
    Catch ex As Exception

    End Try

    tmUpdateAlarms.Enabled = True
End Sub

Answer 1

 <asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
             <ContentTemplate>
              <artem:GoogleMap ID="GoogleMap1" runat="server"

    DefaultAddress="999 main st, New York ny, 10541" 
    EnableMapTypeControl="True" EnableOverviewMapControl="False" 
    EnableReverseGeocoding="True" EnableStreetViewControl="False" MapType="Roadmap" 
    MaxZoom="25" MinZoom="12" ShowTraffic="False" Zoom="18" Height="380px" 
    Width="550px" Key="1231231231231231231231321231313213" >
</artem:GoogleMap>
              </ContentTemplate>
            </asp:UpdatePanel>

ASP / ASP.net回发问题随着VB.net 2010

1 个答案: