01.using System;
02.using System.Collections.Generic;
03.using System.Linq;
04.using System.Web;
05.using System.Web.UI;
06.using System.Web.UI.WebControls;
07.
08.using System.Data;
09.
10.public partial class MyListView : System.Web.UI.Page
11.{
12. private DataTable Dt;
13.
14. protected void Page_Init(object sender, EventArgs e)
15. {
16. Dt = new DataTable();
17.
18. Dt.Columns.Add(new DataColumn("index", System.Type.GetType("System.Int16")));
19. Dt.Columns.Add(new DataColumn("name", System.Type.GetType("System.String")));
20. Dt.Columns.Add(new DataColumn("count", System.Type.GetType("System.Int16")));
21. }
22.
23. protected void Page_Load(object sender, EventArgs e)
24. {
25. if (ViewState["DataSource"] != null)
26. Dt = (DataTable)ViewState["DataSource"];
27.
28. ListView1.DataSource = Dt;
29. ListView1.DataKeyNames = new string[] { "name" };
30. ListView1.ItemDataBound += new EventHandler<ListViewItemEventArgs>(ListView1_ItemDataBound);
31. ListView1.DataBind();
32.
33. AddButton.Click += new EventHandler(AddButton_Click);
34. }
35.
36. protected void ListView1_ItemDataBound(object sender, ListViewItemEventArgs e)
37. {
38. DataRowView Dr = (DataRowView)e.Item.DataItem;
39.
40. if (e.Item.ItemType == ListViewItemType.DataItem)
41. {
42. ((Label)e.Item.FindControl("Label1")).Text = Dr["index"].ToString();
43. ((Label)e.Item.FindControl("Label2")).Text = Dr["name"].ToString();
44. ((Label)e.Item.FindControl("Label3")).Text = Dr["count"].ToString();
45. }
46. }
47.
48. protected void AddButton_Click(object sender, EventArgs e)
49. {
50. if (HaveProduct(ProductTextBox.Text))
51. {
52.
53. DataRow[] editRow = Dt.Select(string.Format("name LIKE '{0}'", ProductTextBox.Text));
54.
55. editRow[0]["count"] = int.Parse(editRow[0]["count"].ToString()) + 1;
56. }
57. else
58. {
59.
60. DataRow Dr = Dt.NewRow();
61. Dr["index"] = Dt.Rows.Count + 1;
62. Dr["name"] = ProductTextBox.Text;
63. Dr["count"] = 1;
64.
65. Dt.Rows.Add(Dr);
66. }
67.
68. ViewState["DataSource"] = Dt;
69.
70. ListView1.DataSource = Dt;
71. ListView1.DataBind();
72. }
73.
74. private bool HaveProduct(string ProductName)
75. {
76. DataRow[] haveData = Dt.Select(string.Format("name LIKE '{0}'", ProductName));
77.
78. return (haveData.Length > 0) ? true : false;
79. }
80.}
