asp.net技巧点滴(一)
2006-04-17 22:40 Clingingboy 阅读(1712) 评论(0) 编辑 收藏 举报1.使用快捷键
1
<p>
2 <asp:Label ID="Label1" Runat="server" AccessKey="N"
3 AssociatedControlID="Textbox1">User<u>n</u>ame</asp:Label>
4 <asp:Textbox ID="TextBox1" Runat="server"></asp:Textbox></p>
5 <p>
6 <asp:Label ID="Label2" Runat="server" AccessKey="P"
7 AssociatedControlID="Textbox2"><u>P</u>assword</asp:Label>
8 <asp:Textbox ID="TextBox2" Runat="server"></asp:Textbox></p>
9 <p>
10 <asp:Button ID="Button1" Runat="server" Text="确定" />
11 </p>
<p>2
<asp:Label ID="Label1" Runat="server" AccessKey="N" 3
AssociatedControlID="Textbox1">User<u>n</u>ame</asp:Label>4
<asp:Textbox ID="TextBox1" Runat="server"></asp:Textbox></p>5
<p>6
<asp:Label ID="Label2" Runat="server" AccessKey="P" 7
AssociatedControlID="Textbox2"><u>P</u>assword</asp:Label>8
<asp:Textbox ID="TextBox2" Runat="server"></asp:Textbox></p>9
<p>10
<asp:Button ID="Button1" Runat="server" Text="确定" />11
</p>使用 AssociatedControlID 属性将 Web 窗体上的一个 Label 控件与另一个服务器控件关联。当一个 Label 控件与另一个服务器控件相关联时，可以使用其属性扩展关联控件的功能。可以使用 Label 控件作为另一个控件的标题，或者可以设置关联控件的 Tab 键索引或热键
2.TextChanged 事件 当用户更改 TextBox 的文本时发生。
1protected void TextBox1_TextChanged(object sender, EventArgs e)
2
{
3
Response.Write("更改");
4
}
5
6 protected void Button1_Click(object sender, EventArgs e)
7 {
8 Response.Write("没有更改");
9 }
protected void TextBox1_TextChanged(object sender, EventArgs e)2
{
3
Response.Write("更改");4
}5
6
protected void Button1_Click(object sender, EventArgs e)7
{8
Response.Write("没有更改");9
}3.使用Command触发事件
1<%@ Page Language="C#" %>
2
3<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
4
5<script runat="server">
6 protected void Button_Command(Object sender,
7 System.Web.UI.WebControls.CommandEventArgs e)
8 {
9 switch (e.CommandName)
10
{
11 case ("DoSomething1"):
12 Response.Write("Button 1 was selected");
13 break;
14 case ("DoSomething2"):
15 Response.Write("Button 2 was selected");
16 break;
17
}
18 }
19</script>
20
21<html xmlns="http://www.w3.org/1999/xhtml" >
22<head id="Head1" runat="server">
23 <title>Buttons</title>
24</head>
25<body>
26 <form id="form1" runat="server">
27 <div>
28 <asp:Button ID="Button1" Runat="server" Text="Button 1"
29 OnCommand="Button_Command" CommandName="DoSomething1" />
30 <asp:Button ID="Button2" Runat="server" Text="Button 2"
31 OnCommand="Button_Command" CommandName="DoSomething2" />
32 </div>
33 </form>
34</body>
35</html>
<%@ Page Language="C#" %>2
3
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">4
5
<script runat="server">6
protected void Button_Command(Object sender,7
System.Web.UI.WebControls.CommandEventArgs e)8
{9
switch (e.CommandName)10
{
11
case ("DoSomething1"):12
Response.Write("Button 1 was selected");13
break;14
case ("DoSomething2"):15
Response.Write("Button 2 was selected");16
break;17
}18
}19
</script>20
21
<html xmlns="http://www.w3.org/1999/xhtml" >22
<head id="Head1" runat="server">23
<title>Buttons</title>24
</head>25
<body>26
<form id="form1" runat="server">27
<div>28
<asp:Button ID="Button1" Runat="server" Text="Button 1" 29
OnCommand="Button_Command" CommandName="DoSomething1" />30
<asp:Button ID="Button2" Runat="server" Text="Button 2" 31
OnCommand="Button_Command" CommandName="DoSomething2" /> 32
</div>33
</form>34
</body>35
</html>4.使用OnClientClick事件,返回客户端脚本
1<%@ Page Language="C#" %>
2
3<script runat="server">
4 protected void Button1_Click(object sender, EventArgs e)
5 {
6 Response.Write("Postback!");
7 }
8</script>
9
10<script language="javascript" type="text/javascript">
11 function AlertHello()
12 {
13 alert('Hello ASP.NET');
14 }
15</script>
16
17<html xmlns="http://www.w3.org/1999/xhtml" >
18<head id="Head1" runat="server">
19 <title>Button Server Control</title>
20</head>
21<body>
22 <form id="form1" runat="server">
23 <asp:Button ID="Button1" Runat="server" Text="Button"
24 OnClientClick="AlertHello()" OnClick="Button1_Click" />
25 </form>
26</body>
27</html>
28
<%@ Page Language="C#" %>2
3
<script runat="server">4
protected void Button1_Click(object sender, EventArgs e)5
{6
Response.Write("Postback!");7
}8
</script>9
10
<script language="javascript" type="text/javascript">11
function AlertHello()12
{ 13
alert('Hello ASP.NET');14
}15
</script>16
17
<html xmlns="http://www.w3.org/1999/xhtml" >18
<head id="Head1" runat="server">19
<title>Button Server Control</title>20
</head>21
<body>22
<form id="form1" runat="server">23
<asp:Button ID="Button1" Runat="server" Text="Button" 24
OnClientClick="AlertHello()" OnClick="Button1_Click" />25
</form>26
</body>27
</html>28
5.使用控件数据绑定数组
1<%@ Page Language="C#" %>
2
3<script runat="server">
4 protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
5 {
6 string[] CarArray = new string[4] {"Ford", "Honda", "BMW", "Dodge"};
7 string[] AirplaneArray = new string[3] {"Boeing 777", "Boeing 747",
8 "Boeing 737"};
9 string[] TrainArray = new string[3] {"Bullet Train", "Amtrack", "Tram"};
10
11 if (DropDownList1.SelectedValue == "Car") {
12 DropDownList2.DataSource = CarArray; }
13 else if (DropDownList1.SelectedValue == "Airplane") {
14 DropDownList2.DataSource = AirplaneArray; }
15 else {
16 DropDownList2.DataSource = TrainArray;
17 }
18
19 DropDownList2.DataBind();
20 DropDownList2.Visible = true;
21 }
22
23 protected void Button1_Click(object sender, EventArgs e)
24 {
25 Response.Write("You selected <b>" +
26 DropDownList1.SelectedValue.ToString() + ": " +
27 DropDownList2.SelectedValue.ToString() + "</b>");
28 }
29</script>
30
31
32<html xmlns="http://www.w3.org/1999/xhtml" >
33<head id="Head1" runat="server">
34 <title>DropDownList Page</title>
35</head>
36<body>
37 <form id="form1" runat="server">
38 <div>
39 Select transportation type:<br />
40 <asp:DropDownList ID="DropDownList1" Runat="server"
41 OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged"
42 AutoPostBack="true">
43 <asp:ListItem>Select an Item</asp:ListItem>
44 <asp:ListItem>Car</asp:ListItem>
45 <asp:ListItem>Airplane</asp:ListItem>
46 <asp:ListItem>Train</asp:ListItem>
47 </asp:DropDownList>
48 <asp:DropDownList ID="DropDownList2" Runat="server" Visible="false">
49 </asp:DropDownList>
50 <asp:Button ID="Button1" Runat="server" Text="Select Options"
51 OnClick="Button1_Click" />
52 </div>
53 </form>
54</body>
55</html>
56
<%@ Page Language="C#" %>2
3
<script runat="server">4
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)5
{6
string[] CarArray = new string[4] {"Ford", "Honda", "BMW", "Dodge"};7
string[] AirplaneArray = new string[3] {"Boeing 777", "Boeing 747", 8
"Boeing 737"};9
string[] TrainArray = new string[3] {"Bullet Train", "Amtrack", "Tram"};10
11
if (DropDownList1.SelectedValue == "Car") {12
DropDownList2.DataSource = CarArray; }13
else if (DropDownList1.SelectedValue == "Airplane") {14
DropDownList2.DataSource = AirplaneArray; }15
else {16
DropDownList2.DataSource = TrainArray; 17
}18
19
DropDownList2.DataBind();20
DropDownList2.Visible = true;21
}22
23
protected void Button1_Click(object sender, EventArgs e)24
{25
Response.Write("You selected <b>" +26
DropDownList1.SelectedValue.ToString() + ": " +27
DropDownList2.SelectedValue.ToString() + "</b>");28
}29
</script>30
31
32
<html xmlns="http://www.w3.org/1999/xhtml" >33
<head id="Head1" runat="server">34
<title>DropDownList Page</title>35
</head>36
<body>37
<form id="form1" runat="server">38
<div>39
Select transportation type:<br />40
<asp:DropDownList ID="DropDownList1" Runat="server" 41
OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" 42
AutoPostBack="true">43
<asp:ListItem>Select an Item</asp:ListItem>44
<asp:ListItem>Car</asp:ListItem>45
<asp:ListItem>Airplane</asp:ListItem>46
<asp:ListItem>Train</asp:ListItem>47
</asp:DropDownList> 48
<asp:DropDownList ID="DropDownList2" Runat="server" Visible="false">49
</asp:DropDownList>50
<asp:Button ID="Button1" Runat="server" Text="Select Options" 51
OnClick="Button1_Click" />52
</div>53
</form>54
</body>55
</html>56
6.使用ListItem.Enabled 禁用列表项
1<%@ Page Language="C#" %>
2
3<script runat="server">
4
5 protected void Dropdownlist1_SelectedIndexChanged(object sender, EventArgs e)
6 {
7 Response.Write("You selected item number " +
8 DropDownList1.SelectedValue + "<br>");
9 Response.Write("You didn't select item number " +
10 DropDownList1.Items[1].Value);
11 }
12</script>
13
14<html>
15<head id="Head1" runat="server">
16 <title>DropDownList Server Control</title>
17</head>
18<body>
19 <form id="form1" runat="server">
20 <asp:DropDownList ID="DropDownList1" Runat="server" AutoPostBack="True" OnSelectedIndexChanged="Dropdownlist1_SelectedIndexChanged">
21 <asp:ListItem Value="1">First Choice</asp:ListItem>
22 <asp:ListItem Value="2" Enabled="False">Second Choice</asp:ListItem>
23 <asp:ListItem Value="3">Third Choice</asp:ListItem>
24 </asp:DropDownList>
25 </form>
26</body>
27</html>
28
<%@ Page Language="C#" %>2
3
<script runat="server">4
5
protected void Dropdownlist1_SelectedIndexChanged(object sender, EventArgs e)6
{7
Response.Write("You selected item number " +8
DropDownList1.SelectedValue + "<br>");9
Response.Write("You didn't select item number " +10
DropDownList1.Items[1].Value);11
}12
</script>13
14
<html>15
<head id="Head1" runat="server">16
<title>DropDownList Server Control</title>17
</head>18
<body>19
<form id="form1" runat="server">20
<asp:DropDownList ID="DropDownList1" Runat="server" AutoPostBack="True" OnSelectedIndexChanged="Dropdownlist1_SelectedIndexChanged">21
<asp:ListItem Value="1">First Choice</asp:ListItem>22
<asp:ListItem Value="2" Enabled="False">Second Choice</asp:ListItem>23
<asp:ListItem Value="3">Third Choice</asp:ListItem>24
</asp:DropDownList>25
</form>26
</body>27
</html>28
