ListView 无 DataSource 依然用 DataPager 翻页

时间：2024-07-15 15:07:08

ListView 有 DataSource 使用 DataPager 翻页

ListView有DataSource时，直接在 itemPlaceholder后面放一个DataPager即可翻页。

<asp:LinqDataSource ID="LinqDataSourceSoftware" runat="server" ContextTypeName="DataClassesDataContext" EntityTypeName="" OrderBy="SoftwareName desc" TableName="Softwares"></asp:LinqDataSource>

<asp:ListView ID="ListViewSoftwares" runat="server"

     DataSourceID="LinqDataSourceSoftware"

     OnItemCommand="ListViewSoftwares_ItemCommand">

    <LayoutTemplate>

        <table cellpadding="" runat="server" id="tblSoftLibrary" cellspacing="" class="ListView">

            <tr runat="server">

                <th runat="server" style="width:50%;"></th>

                <th runat="server" style="width:50%;"></th>

            </tr>

            <tr runat="server" id="itemPlaceholder"/>

            <tr runat="server">

                <td colspan="">

                    <asp:DataPager runat="server" ID="DataPagerSoftwares"

                        PagedControlID="ListViewSoftwares"

                        PageSize=""

                        Class="ListViewPager" >

                        <Fields>

                            <asp:NextPreviousPagerField

                                ShowFirstPageButton="true"

                                FirstPageText="<<"

                                ShowNextPageButton="false"

                                ShowPreviousPageButton="false"/>

                            <asp:NumericPagerField  ButtonCount="" />

                            <asp:NextPreviousPagerField

                                ShowLastPageButton="true"

                                LastPageText=">>"

                                ShowNextPageButton="false"

                                ShowPreviousPageButton="false"/>

                        </Fields>

                    </asp:DataPager>

                </td>

            </tr>

        </table>

    </LayoutTemplate>

    <ItemTemplate>

        <tr runat="server" >

            <td>

                <asp:Image ID="Image1" runat="server" ImageUrl='<%# ImagePathPrefix+Eval("ImagePath").ToString() %>' />

            </td>

            <td>

                  <asp:Label ID="LabelName" runat="server" Text='<%#Eval("SoftwareName") %>' Font-Bold="true"/>

            </td>

        </tr>

    </ItemTemplate>

</asp:ListView>

ListView 无 DataSource 使用 DataPager 翻页

ListView无DataSource时，直接使用DataPager翻页，将会遇到以下问题

问题描述

点击两次才能翻页

翻页按钮点击一次后不会有任何反应，直到第二次点击后才翻页
ListView 无 DataSource 依然用 DataPager 翻页

返回上一页,内容为空

往前翻页，内容为空
ListView 无 DataSource 依然用 DataPager 翻页
而且翻页后的内容也是错的，第二页依然显示的是第一页开头几项

解决方法

这个问题的原因是DataPager找不到当前ListView的PageChangingProperty，所以我们得手动添加OnPagePropertiesChanging事件
OnPagePropertiesChanging

<asp:ListView ID="ListViewSoftwares" runat="server"

     DataSourceID="LinqDataSourceSoftware"

     OnItemCommand="ListViewSoftwares_ItemCommand"

     OnPagePropertiesChanging="ListViewSoftwares_OnPagePropertiesChanging">
    protected void ListViewSoftwares_OnPagePropertiesChanging(object sender, PagePropertiesChangingEventArgs e)

    {

        //set current page startindex, max rows and rebind to false

        DataPagerSoftwares.SetPageProperties(e.StartRowIndex, e.MaximumRows, false);

        //rebind ListView

        BindListViewSoftwares();

    }

    protected void BindListViewSoftwares()

    {

        DataClassesDataContext da = new DataClassesDataContext();

        var softwares = from s in da.EMS_Softwares

                        select s;

        ListViewSoftwares.DataSource = softwares;

        ListViewSoftwares.DataBind();

    }

而且为了后台设置 DataPager 控件属性，我们得把DataPager控件挪出ListView

<asp:ListView ID="ListViewSoftwares" runat="server"

     OnItemCommand="ListViewSoftwares_ItemCommand"

     OnPagePropertiesChanging="ListViewSoftwares_OnPagePropertiesChanging">

    <LayoutTemplate>

        <table cellpadding="" runat="server" id="tblSoftLibrary" cellspacing="" class="ListView">

            <tr runat="server">

                <th runat="server" style="width:50%;"></th>

                <th runat="server" style="width:50%;"></th>

            </tr>

            <tr runat="server" id="itemPlaceholder"/>

        </table>

    </LayoutTemplate>

    <ItemTemplate>

        <tr runat="server" >

            <td>

                <asp:Image ID="Image1" runat="server" ImageUrl='<%# ImagePathPrefix+Eval("ImagePath").ToString() %>' />

            </td>

            <td>

                  <asp:Label ID="LabelName" runat="server" Text='<%#Eval("SoftwareName") %>' Font-Bold="true"/>

            </td>

        </tr>

    </ItemTemplate>

</asp:ListView>

<tr runat="server">

    <td colspan="">

        <asp:DataPager runat="server" ID="DataPagerSoftwares"

            PagedControlID="ListViewSoftwares"

            PageSize=""

            Class="ListViewPager" >

            <Fields>

                <asp:NextPreviousPagerField

                    ShowFirstPageButton="true"

                    FirstPageText="<<"

                    ShowNextPageButton="false"

                    ShowPreviousPageButton="false"/>

                <asp:NumericPagerField  ButtonCount="" />

                <asp:NextPreviousPagerField

                    ShowLastPageButton="true"

                    LastPageText=">>"

                    ShowNextPageButton="false"

                    ShowPreviousPageButton="false"/>

            </Fields>

        </asp:DataPager>

    </td>

</tr>

参考链接：http://weblogs.asp.net/hajan/paging-listview-using-datapager-without-using-datasource-control

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