GirdView学习之六 使用模板列实现多行删除

 1using System;
 2using System.Data;
 3using System.Configuration;
 4using System.Collections;
 5using System.Web;
 6using System.Web.Security;
 7using System.Web.UI;
 8using System.Web.UI.WebControls;
 9using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Collections.Generic;

public partial class GridViewTemplateTest : System.Web.UI.Page
{
    //当前页码,从0开始
    private int curPage
    {
        get
        {
            return ViewState["curPage"] == null ? 0 : Convert.ToInt32(ViewState["curPage"]);
        }
        set
        {
            ViewState["curPage"] = value;
        }
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            ClientInfoAccessObj accessor = new ClientInfoAccessObj();
            curPage = 0;  //显示第一页
            GridView1.DataSource = accessor.GetAllClients();
            GridView1.DataBind();
        }
    }
    protected void btnDeleteSelectedInfo_Click(object sender, EventArgs e)
    {
        List<int> SelectedClientIDs = GetSelectedClientIDs();
        if (SelectedClientIDs.Count == 0)
            return;

        ClientInfoAccessObj accessor = new ClientInfoAccessObj();
        foreach (int id in SelectedClientIDs)
        {
            accessor.DeleteClientInfoForID(id);
        }
        ClientScript.RegisterStartupScript(this.GetType(), "info", "alert('记录已成功删除');", true);

        //计算应该显示哪一页
        if (SelectedClientIDs.Count == GridView1.PageSize) //选中全页上的所有记录
            if (curPage != 0)
                curPage--;   //显示前一页


        //重新绑定数据并显示
        GridView1.DataSource = accessor.GetAllClients();
        GridView1.PageIndex = curPage;
        GridView1.DataBind();
    }

    private List<int> GetSelectedClientIDs()
    {
        List<int> ids = new List<int>();
        //循环查找被选中的行
        foreach (GridViewRow gvr in GridView1.Rows)
        {
            //是数据行
            if (gvr.RowType == DataControlRowType.DataRow)
            {
                //根据模板列中的控件ID查找指定的控件
                CheckBox chk = gvr.FindControl("CheckBox1") as CheckBox;
                if ((chk != null) && chk.Checked)
                    //取出选中行的主键，加入到集合中
                    ids.Add((int)GridView1.DataKeys[gvr.RowIndex].Value);
            }
        }
        return ids;
    }
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        ClientInfoAccessObj accessor = new ClientInfoAccessObj();
        GridView1.DataSource = accessor.GetAllClients();
        GridView1.PageIndex = e.NewPageIndex;
        GridView1.DataBind();
        //保存当前页码
        curPage = e.NewPageIndex;
    }
}