Paging in datalist databind control in asp.net

Always we need to implement DataList instead of GridView for custom design (unformated view) and there is a need of paging in DataList then what should do for paging there is lots of article in search engine for implementing paging in dataset but they are typically complicated to implement here is the simplest code for implemeting paging in DataList with PagedDataSource.

Paging in datalist in asp.net

The PagedDataSource class provided by asp.net is used to provide a paging facility to a DataBound control, such as DataList, Repeater, GridView, DetailsView, etc. Although there is an AllowPaging property to handle paging in these Gridview and DataGrid which internally use PagedDataSource class but not with Repeater and DataList we have to implement it manually through PagedDataSource.

Below is the code for that which have the functionality with Next, Previous, First and Last buttons.


PagedDataSource CS Part:
public int index {
    get {
        if (ViewState["index"] == null)
            return 0;
        else
            return Convert.ToInt32(ViewState["index"].ToString());
    }
    set{
        ViewState["index"] = value;
    }
}

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
        Bind();
}

private void Bind()
{
    DataTable dt = FillData();

    if (dt.Rows.Count > 0)
    {
        PagedDataSource _pageDataSource = new PagedDataSource();
        _pageDataSource.DataSource = dt.DefaultView;
        _pageDataSource.AllowPaging = true;
        _pageDataSource.PageSize = 5;
        _pageDataSource.CurrentPageIndex = index;
         ViewState["LastPage"] =  _pageDataSource .PageCount - 1;

        dlistSimilarAds.DataSource = _pageDataSource;
        dlistSimilarAds.DataBind();

        lnkPrev.Visible = !_pageDataSource.IsFirstPage;
        lnkNext.Visible = !_pageDataSource.IsLastPage;

        lnkFirst.Visible = !_ pageDataSource.IsFirstPage;
        lnkLast.Visible = !_ pageDataSource.IsLastPage;
    }
}
public DataTable FillData()
{
    DataSet ds = new DataSet();
    //Fetch data and fill your datatable
    return ds.Tables[0];
}




Next, Previous, First and Last button part:
protected void lnkNext_Click(object sender, EventArgs e)
{
    index += 1;
    Bind();
}
protected void lnkPrev_Click(object sender, EventArgs e)
{
    index -= 1;
    Bind();
}

protected void lnkFirst_Click(object sender, EventArgs e)
{
    index = 0;
    Bind();
}
protected void lnkLast_Click(object sender, EventArgs e)
{
    index = Convert.ToInt32(ViewState["LastPage"]);
    Bind();
}




Html Part:
<asp:DataList ID="dlistSimilarAds" RepeatColumns="3" RepeatDirection="Horizontal"
     runat="server">
 <ItemTemplate>
     <%--Your data here--%>
  </ItemTemplate>
</asp:DataList>

<asp:LinkButton runat="server" OnClientClick="onNext();" ID="lnkPrev" Text="" OnClick="lnkPrev_Click"> </asp:LinkButton>

<asp:LinkButton runat="server" OnClientClick="onNext();" ID="lnkNext" Text="" OnClick="lnkNext_Click"> </asp:LinkButton>

<asp:LinkButton runat="server" OnClientClick="onNext();" ID="lnkFirst" Text="" OnClick="lnkFirst_Click"> </asp:LinkButton>

<asp:LinkButton runat="server" OnClientClick="onNext();" ID="lnkLast" Text="" OnClick="lnkLast_Click"> </asp:LinkButton>

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