利用Gridview 控件提供的默认编辑，删除操作

 1 protected void Page_Load(object sender, EventArgs e)
 2     {
 3         if (!IsPostBack)
 4         {
 5             databind();
 6         }
 7 
 8     }
 9     public void databind()
10     {
11         SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["Conn"].ToString());
12         SqlCommand cmd = new SqlCommand("Select * from Customers", con);
13         SqlDataAdapter da = new SqlDataAdapter(cmd);
14         DataSet ds = new DataSet();
15         da.Fill(ds);
16         this.GridView1.DataSource = ds.Tables[0];
17         this.GridView1.DataKeyNames = new string[] { "CustomerID"};
18         this.GridView1.DataBind();
19     }
20     /// <summary>
21     /// 编辑
22     /// </summary>
23     /// <param name="sender"></param>
24     /// <param name="e"></param>
25      protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
26     {
27         this.GridView1.EditIndex = e.NewEditIndex;
28         databind();
29     }
30     /// <summary>
31     /// 取消
32     /// </summary>
33     /// <param name="sender"></param>
34     /// <param name="e"></param>
35     protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
36     {
37         this.GridView1.EditIndex = -1;
38         databind();
39     }
40     /// <summary>
41     /// 数据更新
42     /// </summary>
43     /// <param name="sender"></param>
44     /// <param name="e"></param>
45     protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
46     {
47         SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["Conn"].ToString());
48         SqlCommand cmd = new SqlCommand();
49         cmd.Connection = con;
50         cmd.CommandText = "Update Customers set CompanyName =@CompanyName ,ContactName=@ContactName where CustomerID=@CustomerID";
51         SqlParameter[] sp = new SqlParameter[3];
52         sp[0] = new SqlParameter("@CompanyName",SqlDbType.NVarChar,40);
53         sp[1] = new SqlParameter("@ContactName",SqlDbType.NVarChar,30);
54         sp[2] = new SqlParameter("@CustomerID",SqlDbType.NChar ,5);
55         sp[0].Value = ((TextBox)(this.GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text;
56         sp[1].Value = ((TextBox)(this.GridView1.Rows[e.RowIndex].Cells[2].Controls[0])).Text;
57         sp[2].Value = this.GridView1.DataKeys[e.RowIndex].Value.ToString();
58         cmd.Parameters.AddRange(sp);
59         if (con.State == ConnectionState.Closed)
60         {
61             con.Open();
62         }
63         cmd.ExecuteNonQuery();
64         con.Close();
65         this.GridView1.EditIndex = -1;
66         databind();
67     }
68     /// <summary>
69     /// 数据删除
70     /// </summary>
71     /// <param name="sender"></param>
72     /// <param name="e"></param>
73     protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
74     {
75         SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["Conn"].ToString());
76         SqlCommand cmd = new SqlCommand();
77         cmd.Connection = con;
78         cmd.CommandText = "Delete Customers where CustomerID=@CustomerID";
79         SqlParameter sp = new SqlParameter("@CustomerID", SqlDbType.NChar, 5);
80         sp.Value = this.GridView1.DataKeys[e.RowIndex].Value;
81         cmd.Parameters.Add(sp);
82         if (con.State == ConnectionState.Closed)
83         {
84             con.Open();
85         }
86         cmd.ExecuteNonQuery();
87         con.Close();
88         databind();
89     }