Allow paging

how to do allow paging and also allow custom paging in datagrid in asp.net?

You have to set AllowPaging property of the DataGrid as true and in the code behind file use a DataDataGridPageChangedEventHandler

private void DataGrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEvent Args e)
{
DataGrid1.CurrentPageIndex = e.NewPageIndex;
DataGrid1.DataBind();
}

//Intitate
private void InitializeComponent()
{
this.DataGrid1.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEvent Handler(this.DataGrid1_PageIndexChanged);
this.Load += new System.EventHandler(this.Page_Load);

}

//IN PAGE LOAD
private void Page_Load(object sender, System.EventArgs e)
{

cmd.Connection=shopObj.con; //Connection object
cmd.CommandText="Select * from TABLENAME";
cmd.CommandType=CommandType.Text;
SqlDataAdapter ad= new SqlDataAdapter(cmd.CommandText,shopObj.con);

DataSet ds= new DataSet();
ad.Fill(ds);
DataGrid1.DataSource=ds;
DataGrid1.DataBind();
}