Here is the simple example of gridview paging:
Set the AllowPaging = True & pagesize = 100 for gridview and write this code in codebehind
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
bindGrid();
}
}
void bindGrid()
{
SqlDataAdapter da = new SqlDataAdapter("select * from TableName", "Connection String");
DataTable dt = new DataTable();
da.Fill(dt);
GridView1.DataSource = dt;
GridView1.DataBind();
}
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;
BindGrid();
//Bind Grid
}