Using QueryString for Pager on Repeater Control in C#

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Using QueryString for Pager on Repeater Control in C#

ASP.NET Website Navigation Tutorial

Tutorial shows how to add page links to your Repeater control and make use of QueryString to move between pages. C# version.

The Repeater control is one of the most powerful controls in the ASP.NET toolbox. However, there is no built-in method of creating pages to display with it, like the GridView, for example. Building a pager for the Repeater control is possible in more than one ways, but if we use PostBack, then the result is not really SEO-friendly.

An alternative to using PostBack is to use a QueryString for the page numbers. This tutorial will show how we can do this, based upon data in the Repeater.
First, add the following assembly reference:

using System.Data.SqlClient;

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For this example, we use a sample database. Add the connection string in the Web.Config similar to the following:

</appSettings>

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Next, we add the following to the ASPX page (a Repeater) and a Label:

</ItemTemplate>
<FooterTemplate></table></FooterTemplate>

</asp:Repeater>
</div>

</form>

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The code-behind should look something like this:

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{

protected void Page_Load(object sender, EventArgs e)
{

DisplayData();

}

public void DisplayData()
{

SqlConnection myConnection = new SqlConnection(ConfigurationManager.AppSettings["ConnectionString"]);
SqlCommand cmd = new SqlCommand("SELECT * FROM [Table1]", myConnection);
cmd.Connection.Open();

SqlDataAdapter myDA = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
myDA.Fill(ds, "Table1");
PagedDataSource pageds = new PagedDataSource();
pageds.DataSource = ds.Tables["Table1"].DefaultView;
pageds.AllowPaging = true;
pageds.PageSize = 3;

int curpage = 0;

if (Request.QueryString["page"] != null)
{

curpage = Convert.ToInt32(Request.QueryString["page"]);

}
else
{

curpage = 1;

}

pageds.CurrentPageIndex = curpage - 1;

if (curpage == 1 && pageds.DataSourceCount > pageds.PageSize)

lblCurrpage.Text = "Pages: 1";

else if (pageds.DataSourceCount == 0)

lblCurrpage.Text = "No data to display.";

else if (curpage > 1 && pageds.DataSourceCount > pageds.PageSize)

lblCurrpage.Text = "Pages: <a href='Default.aspx?page=1'>1</a>";

for (int i = 2; i <= pageds.PageCount; i++)
{

if (i == curpage)

lblCurrpage.Text = lblCurrpage.Text + ", " + i.ToString();

else

lblCurrpage.Text = lblCurrpage.Text + ", <a href='Default.aspx?page=" + i.ToString() + "'>" + i.ToString() + "</a>";

}

Repeater1.DataSource = pageds;
Repeater1.DataBind();
cmd.Connection.Close();
cmd.Connection.Dispose();

}

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