好吧,请多多包涵,因为我有时会有点像木鸭……
我在 asp.net 中有一个 gridview,它将拉回数千条记录。除了事物的性能方面,这一切都很好。我将我的 Gridview 绑定到数据集,这会拉回查询中的每条记录。我想改变这一点,以便 gridview 只拉回它当前显示的记录,然后当用户移动到下一页时,它会转到下一个数据块等。
下面是我通常如何绑定我的网格视图并处理分页和排序,这对我来说非常适合小数据量,但对于大数据量来说不是很好。我使用 SubSonic 作为我的 DAL,这很酷。谁能指出我如何最好地实现上述分页的正确方向?
提前致谢...
public SortDirection SortDir
{
get
{
if (ViewState["sortDirection"] == null)
{
ViewState["sortDirection"] = SortDirection.Ascending;
} return (SortDirection)ViewState["sortDirection"];
}
set
{
ViewState["sortDirection"] = value;
}
}
DataSet ds = new DataSet();
DataView dv = new DataView();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindGrid();
GridView1.DataSource = dv;
GridView1.DataBind();
}
}
private DataView BindGrid()
{
ds = new Query(AnthemWeb.DAL.Item.Schema).ExecuteDataSet();
if (ViewState["sortExpr"] != null)
{
dv = new DataView(ds.Tables[0]);
dv.Sort = (string)ViewState["sortExpr"];
}
else
{
dv = ds.Tables[0].DefaultView;
}
return dv;
}
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;
GridView1.DataSource = BindGrid();
GridView1.DataBind();
}
protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)
{
string stExp = e.SortExpression;
string stDir = string.Empty;
if (SortDir == SortDirection.Ascending)
{
SortDir = SortDirection.Descending;
stDir = "DESC";
}
else
{
SortDir = SortDirection.Ascending;
stDir = "ASC";
}
ViewState["sortExpr"] = e.SortExpression + " " + stDir;
GridView1.DataSource = BindGrid();
GridView1.DataBind();
}
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
int selectedRowIndex;
selectedRowIndex = GridView1.SelectedIndex;
GridViewRow row = GridView1.Rows[selectedRowIndex];
string ID = row.Cells[0].Text;
Response.Redirect("customer-details.aspx?ID=" + ID, false);
}