gridview 中實現的一些常見的功能

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

namespace WebApplication1
{
    public partial class gridview_lianxi : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                Bind();
            }
        }

        private void Bind()
        {
            string strsql = ConfigurationManager.ConnectionStrings["str"].ConnectionString;
            using (SqlConnection sqlcnn = new SqlConnection(strsql))
            {
                using (SqlCommand sqlcmm = sqlcnn.CreateCommand())
                {
                    sqlcmm.CommandText = "select ARTICLEID,CLASSID,TITLE,substring([CONTENT],0,20) as con,CLICKCOUNT,PUBLISHER from ArticleInfo";
                    SqlDataAdapter sd = new SqlDataAdapter(sqlcmm);
                    DataTable dt = new DataTable();
                    sd.Fill(dt);
                    this.GridView1.DataSource = dt;
                    this.GridView1.DataBind();
                    
                }
            }
        }

       
        //用來顯示其他頁的數據
        protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
        {
            GridView1.PageIndex = e.NewPageIndex;

            Bind();

        }
       


       
        private double sum = 0;//用來計算總點擊量
        protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            //鼠標懸停改變當前行背景色
            if (e.Row.RowType == DataControlRowType.DataRow)
            {

                e.Row.Attributes.Add("onmouseover", "c=this.style.backgroundColor;this.style.backgroundColor='#00A9FF'");
                e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=c");

            }
             //計算每頁的總點擊量
            if (e.Row.RowIndex >= 0)
            {
                sum += Convert.ToDouble(e.Row.Cells[5].Text);
            }
            else if (e.Row.RowType == DataControlRowType.Footer)
            {
                e.Row.Cells[4].Text = "當前頁的總點擊量爲：";
                e.Row.Cells[5].Text = sum.ToString();
               

            }

        }


        //刪除，可刪除多行
        protected void btn_del_Click(object sender, EventArgs e)
        {
            foreach (GridViewRow row in this.GridView1.Rows)
            {
                if (row.RowType == DataControlRowType.DataRow)
                {
                    CheckBox ckb = row.Cells[0].FindControl("CheckBox1") as CheckBox;
                    if (ckb.Checked)
                    {
                       // Response.Write(row.Cells[1].Text);
                        string str = ConfigurationManager.ConnectionStrings["str"].ConnectionString;
                        using (SqlConnection sqlCnn = new SqlConnection(str))
                        {
                            using (SqlCommand sqlcmm = sqlCnn.CreateCommand())
                            {
                                sqlcmm.CommandText = "delete  ArticleInfo where ARTICLEID=@id";
                                sqlcmm.Parameters.AddWithValue("@id", row.Cells[1].Text);
                                sqlCnn.Open();
                              int a=  sqlcmm.ExecuteNonQuery();
                              if (a > 0)
                              {
                                  ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('刪除成功')</script>");
                              }
                                sqlCnn.Close();
                                this.Bind();

                            }
                        }
                    }
                }
            }
        }


        //全選
        protected void CheckBox2_CheckedChanged(object sender, EventArgs e)
        {
            CheckBox ckb = sender as CheckBox;
            foreach (GridViewRow row in this.GridView1.Rows)
            {
                if (row.RowType == DataControlRowType.DataRow)
                {
                    (row.Cells[0].FindControl("CheckBox1") as CheckBox).Checked = ckb.Checked;
                }
            }
        }

    }
}