Question

我正在使用telerik radgrid并希望执行服务器端分页。我正在通过telerik对this demo进行反思。

以下是显示我的网格配置如何处理此问题的代码。

 <telerik:RadGrid ID="radGridMyWorksheet" AllowMultiColumnSorting="true" runat="server" AutoGenerateColumns="false" ShowStatusBar="True"
        AllowSorting="True" ClientSettings-Scrolling-EnableVirtualScrollPaging="false"
        ClientSettings-Scrolling-AllowScroll="false" AllowCustomPaging="true"
        OnNeedDataSource="radGridMyWorksheet_NeedDataSource" AllowFilteringByColumn="True" OnGroupsChanging="radGridMyWorksheet_GroupsChanging"
        EnableLinqExpressions="false"
        OnItemDataBound="radGridMyWorksheety_ItemDataBound" OnInsertCommand="radGridMyWorksheet_InsertCommand">            
        <MasterTableView DataKeyNames="ID" AllowMultiColumnSorting="true"
            Width="100%" CommandItemDisplay="Top" Name="radGridMyWorksheet" AllowPaging="true">
            <AlternatingItemStyle BackColor="WhiteSmoke" />

这是我的代码，它为gridview提供数据。

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            radGridMyWorksheet.VirtualItemCount = calling method that returns total record count
        }
    }


protected void radGridMyWorksheet_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
    {
        try
        {

            List<Expression<Func<RouteWorksheet, object>>> include = new List<Expression<Func<RouteWorksheet, object>>>();
            Expression<Func<RouteWorksheet, object>> routeInclude = (route) => route.Route;
            include.Add(routeInclude);

            int CurrentPageIndex = radGridMyWorksheet.CurrentPageIndex == 0 ? 1 : radGridMyWorksheet.CurrentPageIndex;
            int startRowIndex = (ShouldApplySortFilterOrGroup()) ?
                1 : CurrentPageIndex * radGridMyWorksheet.PageSize;

            int maximumRows = (ShouldApplySortFilterOrGroup()) ?
                radGridMyWorksheet.VirtualItemCount : radGridMyWorksheet.PageSize;

            radGridMyWorksheet.AllowCustomPaging = !ShouldApplySortFilterOrGroup();

            var routeWorksheet = Repository<RouteWorksheet>.GetEntityListForQuery(r => routeIDs.Contains(r.RouteID) && r.IsDeleted == false
                , x => x.OrderByDescending(y => y.RouteDate), include,
                startRowIndex, maximumRows);

            radGridMyWorksheet.DataSource = routeWorksheet;
        }
        catch (Exception ex)
        {
            Utility.WalkException(this.Master, ex, "There was an error while processing the myworksheets record.");
        }
    }


 public bool ShouldApplySortFilterOrGroup()
    {
        return radGridMyWorksheet.MasterTableView.FilterExpression != "" ||
            (radGridMyWorksheet.MasterTableView.GroupByExpressions.Count > 0 || isGrouping) ||
            radGridMyWorksheet.MasterTableView.SortExpressions.Count > 0;
    }

这里自定义分页工作正常。但过滤和排序不起作用。谁能指出我在这里做错了什么？

Answer 1

如果要使用带有过滤和排序的自定义分页，则需要在应用过滤器（或排序表达式）时禁用自定义分页，并且需要将整个数据集提供给RadGrid的DataSource，以便它可以应用它的内部分页功能，如您所指的演示。

Answer 2

Protected Sub RadGrid1_NeedDataSource(ByVal source As Object, ByVal e As GridNeedDataSourceEventArgs) 'Handles RadGrid1.NeedDataSource
    Dim RadGrid1 As RadGrid = CType(Page.Master.FindControl("ContentPlaceHolder1").FindControl("RadGrid1"), RadGrid)

    Dim gridSortString As String = RadGrid1.MasterTableView.SortExpressions.GetSortString()

    Dim args As New DataSourceSelectArguments(gridSortString)

    If gridSortString Is Nothing Then
        RadGrid1.DataSource = GetDataTable("SELECT کالا.شناسه, کالا.عنوان, کالا.پوشه, بارگیری, کالا.گروه_شناسه, گروه.عنوان AS گروه FROM کالا LEFT JOIN گروه ON کالا.گروه_شناسه = گروه.شناسه")
    Else
        RadGrid1.DataSource = GetDataTable("SELECT کالا.شناسه, کالا.عنوان, کالا.پوشه, بارگیری, کالا.گروه_شناسه, گروه.عنوان AS گروه FROM کالا LEFT JOIN گروه ON کالا.گروه_شناسه = گروه.شناسه ORDER BY " & gridSortString)
    End If

End Sub

Telerik RadGrid自定义分页过滤器和排序不起作用

2 个答案: