listview的刷新问题

t69490741 2017-04-18 01:53:02

关于listview的，
我加载listview数据之后，选择listview的某一行，控件会刷新，选择的那一行会跳转到变成第一行
我希望选择某一行之后，位置保持不变



<%@ Page Language="VB" AutoEventWireup="false" CodeFile="123.aspx.vb" Inherits="_123" %>



<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

    <title></title>

</head>

<body>

    <form id="form1" runat="server">

    <div>

    </div>

    <asp:ScriptManager ID="ScriptManager1" runat="server">

    </asp:ScriptManager>

    <asp:UpdatePanel ID="UpdatePanel2" runat="server" ChildrenAsTriggers="True">

        <ContentTemplate>

    <asp:ListBox ID="projectlist" drawSelectorOnTop="false" runat="server" Height="252px" Width="318px">

    </asp:ListBox>

    </ContentTemplate>

    </asp:UpdatePanel>

    <asp:Button ID="Button1" runat="server" Text="Button" />

    <asp:UpdatePanel ID="UpdatePanel1" runat="server" ChildrenAsTriggers="True">

        <ContentTemplate>

        

            <asp:TextBox ID="TextBox1" runat="server">

   

            </asp:TextBox>

             <input type="text" id="Text1" width="250px" runat="server" />

        </ContentTemplate>

    </asp:UpdatePanel>

    <input id="projectindex" type="text" name="projectindex" runat="server" />

    </form>

</body>

</html>



Partial Class _123

    Inherits System.Web.UI.Page

    Private Sub SetProject(Optional strArrow As String = "")

        Dim strPageArr As String() = projectlist.ToolTip.Split(",")

        Dim intCount As Integer = 0

        '

        If strArrow = "-" Then strPageArr(0) = CInt(strPageArr(0)) - CInt(strPageArr(1))

        If strArrow = "+" Then strPageArr(0) = CInt(strPageArr(0)) + CInt(strPageArr(1))

        '

        projectlist.Items.Clear()



        Using DC As New SqlConnection(ConfigurationManager.AppSettings("SqlServer"))

            DC.Open()

            '

            Using DA As New SqlDataAdapter("SELECT 编号,标题 FROM 项目", DC)

                Using DS As New DataSet()

                    DA.Fill(DS, "Project")

                    intCount = DS.Tables("Project").Rows.Count

                    '

                    'DS.Tables("Project").Clear()

                    'DA.Fill(DS, CInt(strPageArr(0)), CInt(strPageArr(1)), "Project")



                    projectlist.DataSource = DS

                    projectlist.DataValueField = "编号"

                    projectlist.DataTextField = "标题"

                    projectlist.DataBind()

                End Using

            End Using

        End Using

        '

        'projectlist.ToolTip = strPageArr(0) & "," & strPageArr(1)

    End Sub



    Protected Sub Button1_Click(sender As Object, e As System.EventArgs) Handles Button1.Click

        Dim a As String

        Context.Response.ContentType = "text/plain"

        a = Context.Request.Params("projectindex").ToString()

        'SetProject()



    End Sub



    Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load

        If Not IsPostBack Then

            projectlist.AutoPostBack = True

            SetProject()

        End If



    End Sub



    Protected Sub projectlist_SelectedIndexChanged(sender As Object, e As System.EventArgs) Handles projectlist.SelectedIndexChanged

        Dim a As String

        a = projectlist.SelectedItem.Text

        TextBox1.Text = a

        Text1.Value = a

    End Sub



End Class

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t69490741 2017-04-18

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搞定，原来还是updatepanel得问题改成如下方式即可，不需要一直更新


<asp:UpdatePanel ID="UpdatePanel2" runat="server" ChildrenAsTriggers="false" UpdateMode ="Conditional">
        <ContentTemplate>
    <asp:ListBox ID="projectlist" runat="server" Height="252px" Width="318px">
    </asp:ListBox>
    </ContentTemplate>
    </asp:UpdatePanel>