向 gridview 添加分页 asp.net

Question

我想要的是分页以清晰地查看数据。这是我的 html gridview 代码：

<asp:gridview ID = "grid" runat="server"  AllowPaging="true" OnPageIndexChanging="gdview_PageIndexChanging">

和后面的代码：

public static string cs = "Server=PAULO;Database=ShoppingCartDB;Integrated Security=true";
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["New"] != null)
        {
            if (!IsPostBack)
            {
                SqlConnection con = new SqlConnection(cs);
                con.Open();

                string sql = "SELECT * FROM CustomerDetails Where CustomerName = '" + Session["New"] +"'";
                SqlDataAdapter da = new SqlDataAdapter(sql, con);
                DataTable dt = new DataTable();
                da.Fill(dt);




                Label2.Text += Session["New"].ToString();
                linkLogout.Visible = true;
                //linkOrderHistory.Visible = true;
                Label2.Visible = true;
                linkViewProfile.Visible = true;
                grid.DataSource = dt;
                grid.DataBind();
            }
        }

    }
    private void CustomBindData()
    {
        SqlConnection con = new SqlConnection(cs);
        con.Open();

        string sql = "SELECT * FROM CustomerDetails Where CustomerName = '" + Session["New"] + "'";
        SqlDataAdapter da = new SqlDataAdapter(sql, con);
        DataTable dt = new DataTable();
        da.Fill(dt);
    }
    protected void gdview_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        CustomBindData();
        grid.PageIndex = e.NewPageIndex;
        grid.DataBind();
    }

不知何故，我的代码无法正常工作。它有页面，但是当我点击第 2 页时，没有显示任何数据。我认为这与我如何从 sql 获取数据有关。有什么技巧吗？

Answer 1

而不是这个

protected void gdview_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
    grid.PageIndex = e.NewPageIndex;
    grid.DataBind();
}

使用以下..在页面加载中将数据源存储到您用于 gridview 的会话中，然后执行以下操作，

Session[gridviewsouce] = dt; //dataTable which you were using in page_load

并在页面索引更改功能..

protected void gdview_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
    grid.PageIndex = e.NewPageIndex;
    DataTabel dt = Session[gridviewsouce] as DataTable;
    grid.DataSource = dt;
    grid.DataBind();
}

Answer 2

我添加了

private void CustomBindData()
    {
        SqlConnection con = new SqlConnection(cs);
        con.Open();

        string sql = "SELECT * FROM CustomerDetails Where CustomerName = '" + Session["New"] + "'";
        SqlDataAdapter da = new SqlDataAdapter(sql, con);
        DataTable dt = new DataTable();
        da.Fill(dt);

        grid.DataSource = dt;
        grid.DataBind();
    }
    protected void gdview_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        CustomBindData();
        grid.PageIndex = e.NewPageIndex;
        grid.DataBind();
    }

向 gridview 添加分页 asp.net

add pagination to gridview asp.net

c#

asp.net

pagination

gridview

page-index-changed