Sharepoint 2010自定义WebPart分页

Question

I am trying to implement simple paging on my sharepoint webpart. I have a single news articles list which has some simple columns. I want to be able to have then five on a page and with some numerical paging at the bottom. I have gone through the net trying to understand splistitemcollectionposition but with no luck. If anyone can help please can you give me a simple code example or some guidanc

Many thanks

Chris

Answer 1

我建议使用SPDataSource和SPGridView，它们一起可以用最少的代码或根本不用代码来实现分页和许多其他很酷的功能。

Answer 2

Use this aa guide for some of the classes/methods/properties you might need to use to get paging to work. Be aware that this code does not compile, i have just pulled together various code snippets that i have in my own list results framework, which includes paging, sorting, grouping and caching. It should be enough to get you started though.

public class PagedListResults : System.Web.UI.WebControls.WebParts.WebPart {

    protected SPPagedGridView oGrid;

    protected override void CreateChildControls() {
        this.oGrid = new SPPagedGridView();
        oGrid.AllowPaging = true;
        oGrid.PageIndexChanging += new GridViewPageEventHandler(oGrid_PageIndexChanging);
        oGrid.PagerTemplate = null;  // Must be called after Controls.Add(oGrid)
        oGrid.PagerSettings.Mode = PagerButtons.NumericFirstLast;
        oGrid.PagerSettings.PageButtonCount = 3;
        oGrid.PagerSettings.Position = PagerPosition.TopAndBottom;
        base.CreateChildControls();
    }

    public override void DataBind() {
        base.DataBind();

        SPQuery q = new SPQuery();
        q.RowLimit = (uint)info.PageSize;
        if (!string.IsNullOrEmpty(info.PagingInfoData)) {
            SPListItemCollectionPosition pos = new SPListItemCollectionPosition(info.PagingInfoData);
            q.ListItemCollectionPosition = pos;
        } else {
            //1st page, dont need a position, and using a position breaks things
        }
        q.Query = info.Caml;
        SPListItemCollection items = SPContext.Current.List.GetItems(q);

        FilterInfo info = null;
        string tmp = "<View></View>";
        tmp = tmp.Replace("<View><Query>", string.Empty);
        tmp = tmp.Replace("</Query></View>", string.Empty);
        info.Caml = tmp;
        info.PagingInfoData = string.Empty;
        info.CurrentPage = oGrid.CurrentPageIndex;
        info.PageSize = oGrid.PageSize;
        if (oGrid.PageIndex == 0 || oGrid.CurrentPageIndex == 0) {
            //do nothing
        } else {
            StringBuilder value = new StringBuilder();
            value.Append("Paged=TRUE");
            value.AppendFormat("&p_ID={0}", ViewState[KEY_PagingPrefix + "ID:" + oGrid.PageIndex]);
            info.PagingInfoData = value.ToString();
        }

        int pagecount = (int)Math.Ceiling(items.Count / (double)oGrid.PageSize);
        for (int i = 1; i < pagecount; i++) { //not always ascending index numbers
            ResultItem item = items[(i * oGrid.PageSize) - 1];
            ViewState[KEY_PagingPrefix + "ID:" + i] = item.ID;
        }

        oGrid.VirtualCount = items.Count;

        DateTime time3 = DateTime.Now;
        DataTable table = new DataTable("Data");
        DataBindListData(table, items);

        this.oGrid.DataSource = table;
        this.oGrid.DataBind();
        this.oGrid.PageIndex = oGrid.CurrentPageIndex; //need to reset this after DataBind
    }

    void oGrid_PageIndexChanging(object sender, GridViewPageEventArgs e) {
        oGrid.PageIndex = e.NewPageIndex;
        oGrid.CurrentPageIndex = oGrid.PageIndex;
    }
}

public class FilterInfo {
    public string Caml;
    public string PagingInfoData;
    public int CurrentPage;
    public int PageSize;
}

public class SPPagedGridView : SPGridView {

    protected override void InitializePager(GridViewRow row, int columnSpan, PagedDataSource pagedDataSource) {
        pagedDataSource.AllowCustomPaging = true;
        pagedDataSource.VirtualCount = virtualcount;
        pagedDataSource.CurrentPageIndex = currentpageindex;
        base.InitializePager(row, columnSpan, pagedDataSource);
    }

    private int virtualcount = 0;
    public int VirtualCount {
        get { return virtualcount; }
        set { virtualcount = value; }
    }

    private int currentpageindex = 0;
    public int CurrentPageIndex {
        get { return currentpageindex; }
        set { currentpageindex = value; }
    }
}

Answer 3

查看我有关如何使用SPListItemCollectionPosition进行分页的文章，我做了一个组件来对列表进行分页，也许它可以帮助-> http://hveiras.wordpress.com/2011/11/07/listpagert-using-splistitemcollectionposition/