DataGrid中TextBox的onChange事件实现的两种方法
微软的控件功能很强,开发起来容易上手,可是需求总是不能满足的。所以我们为了满足不同需求,会重写一控件.
就比如DataGrid中TextBox的onChange事件.DataGrid捕获不到,TextBox和Button不一样.Button有commandName属性,我们可以用commandName属性来区别触发的事件.如果要实现TextBox的onChange事件让DataGrid捕获,那就需要事件提升,现在有2种解决方案第一种,重写TextBox控件
前台代码
Code
1
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3" %>2
<%@ Register Namespace ="Abin.Controls" TagPrefix="Abin"%>3
DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">4
5
<html xmlns="http://www.w3.org/1999/xhtml" >6
<head runat="server">7
<title>无标题页title>8
head>9
<body>10
<form id="form1" runat="server">11
<div>12
<asp:DataGrid ID="DataGrid1" runat="server" AutoGenerateColumns="False"13
OnItemCommand="DataGrid1_ItemCommand">14
<Columns>15
<asp:TemplateColumn>16
<ItemTemplate>17
<Abin:CommandTextBox ID="TextBox1" runat="server" CommandName="OnChange" AutoPostBack="True">Abin:CommandTextBox>18
ItemTemplate>19
<HeaderTemplate>20
工号21
HeaderTemplate>22
asp:TemplateColumn>23
<asp:TemplateColumn>24
<ItemTemplate>25
<Abin:CommandTextBox ID="TextBox2" runat="server" BackColor="LightGray" ReadOnly="True">Abin:CommandTextBox>26
ItemTemplate>27
<HeaderTemplate>28
名字29
HeaderTemplate>30
asp:TemplateColumn>31
Columns>32
asp:DataGrid>div>33
form>34
body>35
html>36
37
后台代码
Code
1
using System;2
using System.Web.UI.WebControls;3
using Abin.Controls;4
5
public partial class Default3 : System.Web.UI.Page6
{7
Page_load#region Page_load8
protected void Page_Load(object sender, EventArgs e)9
{10
if (!IsPostBack)11
{12
BindDataGrid();13
}14
}15
#endregion16
17
DataGrid绑定#region DataGrid绑定18
private void BindDataGrid()19
{20
DataGrid1.DataSource = new string[] { "Abin", "Abin", "Abin", "Abin", "Abin", "Abin" };21
22
DataGrid1.DataBind();23
}24
#endregion25
26
GetResult#region GetResult27
private string GetResult(string strName)28
{29
if (strName == "033221")30
{31
return "阿滨";32
}33
else if (strName == "033222")34
{35
return "小猪";36
}37
else if (strName.Length == 0)38
{39
return null;40
}41
else42
{43
return "沒有找到";44
}45
}46
#endregion47
48
DataGrid1_ItemCommand#region DataGrid1_ItemCommand49
protected void DataGrid1_ItemCommand(object source, DataGridCommandEventArgs e)50
{51
if (e.CommandName == "OnChange")52
{53
string currenttxtName = null;54
55
int index = e.Item.ItemIndex;56
57
CommandTextBox ctb = this.DataGrid1.Items[index].FindControl("TextBox1") as CommandTextBox;58
59
if (ctb != null)60
{61
currenttxtName = ctb.Text;62
}63
64
ctb = this.DataGrid1.Items[index].FindControl("TextBox2") as CommandTextBox;65
66
if (ctb != null)67
{68
ctb.Text = GetResult(currenttxtName);69
}70
}71
}72
#endregion73
74
75
}76
77
78
79
重写TextBox类80
81
82
83
using System;84
using System.Web.UI.WebControls;85
using System.ComponentModel;86
/**//// 87
/// CommandTextBox 的摘要说明88
/// 89
/// 90
namespace Abin.Controls91
{92
public class CommandTextBox : TextBox93
{94
属性#region 属性95
[Browsable(true)]96
public string CommandName97
{98
get99
{100
return ViewState["CommandName"] == null ? string.Empty : ViewState["CommandName"].ToString();101
}102
103
set104
{105
ViewState["CommandName"] = value;106
}107
}108
109
#endregion110
111
事件冒泡#region 事件冒泡112
113
protected virtual void OnCommand(CommandEventArgs e)114
{115
base.RaiseBubbleEvent(this, e);116
}117
#endregion118
119
重写#region 重写120
121
protected override void OnTextChanged(EventArgs e)122
{123
if (this.AutoPostBack)124
{125
CommandEventArgs args = new CommandEventArgs(this.CommandName, null);126
127
OnCommand(args);128
}129
}130
131
#endregion132
}133
}134
135
136
137
这样就可以实现捕获了
第二种：现在我们用第2种方法来实现
前台代码
Code
1
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default4.aspx.cs" Inherits="Default4" %>2
3
DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">4
5
<html xmlns="http://www.w3.org/1999/xhtml" >6
<head runat="server">7
<title>无标题页title>8
head>9
<body>10
<form id="form1" runat="server">11
<div>12
<asp:DataGrid ID="DataGrid1" runat="server" AutoGenerateColumns="False">13
<Columns>14
<asp:TemplateColumn>15
<ItemTemplate>16
<asp:TextBox ID="TextBox1" runat="server" AutoPostBack="True" OnTextChanged="TextBox1_TextChanged">asp:TextBox>17
ItemTemplate>18
<HeaderTemplate>19
工号20
HeaderTemplate>21
asp:TemplateColumn>22
<asp:TemplateColumn>23
<ItemTemplate>24
<asp:TextBox ID="TextBox2" runat="server" AutoPostBack="True" BackColor="LightGray">asp:TextBox>25
ItemTemplate>26
<HeaderTemplate>27
名字28
HeaderTemplate>29
asp:TemplateColumn>30
Columns>31
asp:DataGrid>div>32
form>33
body>34
html>35
36
后台代码
Code 1
using
System; 2
using
System.Data; 3
using
System.Configuration; 4
using
System.Collections; 5
using
System.Web; 6
using
System.Web.Security; 7
using
System.Web.UI; 8
using
System.Web.UI.WebControls; 9
using
System.Web.UI.WebControls.WebParts;10
using
System.Web.UI.HtmlControls;
11
12
public
partial
class
Default4 : System.Web.UI.Page
13
...
{
14 Page_loadPage_load#region Page_load
15 protected void Page_Load(object sender, EventArgs e)16 ...{17 if (!IsPostBack)18 ...{19 BindDataGrid();
20 }21 }22 #endregion2324 DataGrid绑定DataGrid绑定#region DataGrid绑定25 private void BindDataGrid()26 ...{27 DataGrid1.DataSource = new string[] ...{ "Abin", "Abin", "Abin", "Abin", "Abin", "Abin" };2829 DataGrid1.DataBind();30 }31 #endregion3233 GetResultGetResult#region GetResult34 private string GetResult(string strName)35 ...{36 if (strName == "033221")37 ...{38 return "阿滨";39 }40 else if (strName == "033222")41 ...{42 return "小猪";43 }44 else if (strName.Length == 0)45 ...{46 return null;47 }48 else49 ...{50 return "沒有找到";51 }52 }53 #endregion5455 TextBox1_TextChangedTextBox1_TextChanged#region TextBox1_TextChanged56 protected void TextBox1_TextChanged(object sender, EventArgs e)57 ...{58 TextBox tb = (TextBox)sender;5960 if (tb != null)61 ...{62 TableCell cell = tb.Parent as TableCell;6364 if (cell != null)65 ...{66 DataGridItem dgi = cell.Parent as DataGridItem;6768 string currenttxtName = null;6970 int index = dgi.ItemIndex;7172 tb = DataGrid1.Items[index].FindControl("TextBox1") as TextBox;7374 if (tb != null)75 ...{76 TextBox tb1 = DataGrid1.Items[index].FindControl("TextBox2") as TextBox;7778 tb1.Text = GetResult(tb.Text);79 }80 }81 }8283 }84 #endregion
85}
86
87
完整的代码下载
http://www.cnblogs.com/Files/mextb1860/WebSite2.zip