手动绑定SQLDataSource到GridView后分页的问题（转）

由于GridView的数据源是后台CS文件中代码绑定的。所以程序运行时，点击分页数后没有反应。解决办法如下：

using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page 

{

    SqlDataSource source = new SqlDataSource();

    protected void Page_Load(object sender, EventArgs e)

    {

    }

    private void DBind()

        SqlConnection conn = new SqlConnection();

        conn.ConnectionString = ConfigurationManager.ConnectionStrings["TransportConnectionString"].ConnectionString;

        source.ConnectionString = ConfigurationManager.ConnectionStrings["TransportConnectionString"].ConnectionString;

        string sql = "SELECT * from Customer where id<>'' ";

        if (this.客户名称.Text != "")

        {

            sql = sql + " and 客户编码 LIKE '%" + this.客户名称.Text + "%' ";

        }

        source.SelectCommand = sql;

        GridView1.DataSourceID = "";

        GridView1.DataSource = "";

        GridView1.DataSource = source;

        GridView1.DataBind();  

    protected void SearchButton_Click(object sender, EventArgs e)

        GridView1.DataBind(); 

    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)

        GridView1.PageIndex=e.NewPageIndex;

        DBind();

}

需要注意的是，我增加了一个方法，和绑定事件按钮是一样的。需要在PageIndexChanging事件中重新绑定数据源才可以。但是这个办法有一个问题。就是每次切换页数的时候，都会从数据库中查询全部的数据，所以效率上会有问题。看大家有什么解决办法没有？