Listview custom paging with datapager - asp.net

Question

Can anyone please tell me how to implement custom paging with datapager. Now I have managed to do this with 2 buttons (for next and previous pages) and LoadListview() method, but I would like to use this method in datapager. Any suggestions?
Code behind file:
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["BusinessConnectionString"].ToString());
SqlDataAdapter adap;
int startIndex;
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
LoadListview();
}
}
private void LoadListview()
{
string FindWhat = Request.QueryString["Find"];
string FindWhere = Request.QueryString["Where"];
string TownName = FindWhere;
string CountyName = FindWhere;
string PostcodeName = FindWhere;
//startIndex = int.Parse(ViewState["index"].ToString());
startIndex = MyDataPager.StartRowIndex * MyDataPager.PageSize;
int endIndex = startIndex + MyDataPager.PageSize;
adap = new SqlDataAdapter("SELECT * FROM (SELECT ROW_NUMBER() OVER (ORDER BY id_Business) AS MyRow, id_Business, Name, TownName FROM UbeloView WHERE (Name Like '%" + FindWhat + "%' AND TownName Like '%" + TownName + "%') UNION ALL SELECT ROW_NUMBER() OVER (ORDER BY id_Business) AS MyRow, id_Business, Name, TownName FROM UbeloView WHERE (Name Like '%" + FindWhat + "%' AND CountyName Like '%" + CountyName + "%') UNION ALL SELECT ROW_NUMBER() OVER (ORDER BY id_Business) AS MyRow, id_Business, Name, TownName FROM UbeloView WHERE (Name Like '%" + FindWhat + "%' AND PostcodeName Like '%" + PostcodeName + "%')) AS log WHERE MyRow >=" + startIndex + " AND MyRow <=" + endIndex + " ", conn);
DataSet ds = new DataSet();
adap.Fill(ds);
lstBusiness.DataSource = ds;
lstBusiness.DataBind();
}
protected void MyDataPager_PreRender(object sender, EventArgs e)
{
LoadListview();
}

Answer 1

This article could help you: http://www.codeproject.com/Articles/24065/Paging-ListView-With-DataPager
In this article, the author has used a DataPager_PreRender to bind his data to a ListView:
protected void DataPagerProducts_PreRender(object sender, EventArgs e)
{
ProductList db = new ProductList();
this.ListViewProducts.DataSource = db.GellAll();
this.ListViewProducts.DataBind();
}
You could try something similar:
protected void MyDataPager_PreRender(object sender, EventArgs e)
{
LoadListview();
}
Then all you will need to do is modify your LoadListview() method to get the start index from the DataPager control itself.
private void LoadListview()
{
string FindWhat = Request.QueryString["Find"];
string FindWhere = Request.QueryString["Where"];
string TownName = FindWhere;
string CountyName = FindWhere;
string PostcodeName = FindWhere;
startIndex = MyDataPager.StartRowIndex * MyDataPager.PageSize;
adap = new SqlDataAdapter("<Query removed to save space>", conn);
DataSet ds = new DataSet();
adap.Fill(ds);
lstBusiness.DataSource = ds;
lstBusiness.DataBind();
}
As you can see, I am getting the startIndex by getting the row index and multiplying it by the page size of your DataPager. Now you can just change this part of your SQL Query from startIndex * 80 to startIndex.
If all goes to plan, you won't need your btnPrevious and btnNext click events.
I hope this gives you some insight in what you are trying to achieve.