下面的示例显示使用 ScriptManager 控件的不同情形。
启用部分页面更新
下面的示例显示如何使用 ScriptManager 控件来启用部分页面更新。在此示例中，Calendar 和 DropDownList 控件位于 UpdatePanel 控件内部。默认情况下，UpdateMode 属性的值为 Always，而 ChildrenAsTriggers 属性的值为 true。因此，面板的子控件会导致异步回发。
<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Sub DropDownSelection_Change(ByVal Sender As Object, ByVal E As EventArgs)
Calendar1.DayStyle.BackColor = _
System.Drawing.Color.FromName(ColorList.SelectedItem.Value)
End Sub
Protected Sub Calendar1_SelectionChanged(ByVal Sender As Object, ByVal E As EventArgs)
SelectedDate.Text = Calendar1.SelectedDate.ToString()
End Sub
</script>
<html >
<head id="Head1" runat="server">
<title>UpdatePanel Example</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1"
runat="server" />
<asp:UpdatePanel ID="UpdatePanel1"
runat="server">
<ContentTemplate>
<asp:Calendar ID="Calendar1"
ShowTitle="True"
OnSelectionChanged="Calendar1_SelectionChanged"
runat="server" />
<div>
Background:
<br />
<asp:DropDownList ID="ColorList"
AutoPostBack="True"
OnSelectedIndexChanged="DropDownSelection_Change"
runat="server">
<asp:ListItem Selected="True" Value="White">
White </asp:ListItem>
<asp:ListItem Value="Silver">
Silver </asp:ListItem>
<asp:ListItem Value="DarkGray">
Dark Gray </asp:ListItem>
<asp:ListItem Value="Khaki">
Khaki </asp:ListItem>
<asp:ListItem Value="DarkKhaki"> D
ark Khaki </asp:ListItem>
</asp:DropDownList>
</div>
<br />
Selected date:
<asp:Label ID="SelectedDate"
runat="server">None.</asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
<br />
</div>
</form>
</body>
</html>
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
void DropDownSelection_Change(Object sender, EventArgs e)
{
Calendar1.DayStyle.BackColor =
System.Drawing.Color.FromName(ColorList.SelectedItem.Value);
}
protected void Calendar1_SelectionChanged(object sender, EventArgs e)
{
SelectedDate.Text =
Calendar1.SelectedDate.ToString();
}
</script>
<html >
<head id="Head1" runat="server">
<title>UpdatePanel Example</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1"
runat="server" />
<asp:UpdatePanel ID="UpdatePanel1"
runat="server">
<ContentTemplate>
<asp:Calendar ID="Calendar1"
ShowTitle="True"
OnSelectionChanged="Calendar1_SelectionChanged"
runat="server" />
<div>
Background:
<br />
<asp:DropDownList ID="ColorList"
AutoPostBack="True"
OnSelectedIndexChanged="DropDownSelection_Change"
runat="server">
<asp:ListItem Selected="True" Value="White">
White </asp:ListItem>
<asp:ListItem Value="Silver">
Silver </asp:ListItem>
<asp:ListItem Value="DarkGray">
Dark Gray </asp:ListItem>
<asp:ListItem Value="Khaki">
Khaki </asp:ListItem>
<asp:ListItem Value="DarkKhaki"> D
ark Khaki </asp:ListItem>
</asp:DropDownList>
</div>
<br />
Selected date:
<asp:Label ID="SelectedDate"
runat="server">None.</asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
<br />
</div>
</form>
</body>
</html>
处理部分页面更新错误和注册脚本
下面的示例演示如何在部分页面更新期间提供自定义错误处理。默认情况下，如果在部分页面更新期间出现错误，则会显示一个 JavaScript 消息框。该示例演示如何通过为 AsyncPostBackError 事件提供处理程序，以及设置该事件处理程序中的 AsyncPostBackErrorMessage 属性来使用自定义错误处理。还可以设置 AllowCustomErrorsRedirect 属性来指定当在部分页面更新期间出现错误时，如何使用 Web.config 文件的自定义错误部分。在此示例中，使用 AllowCustomErrorsRedirect 属性的默认值。这表明如果 Web.config 文件包含 customErrors 元素，则该元素将决定如何显示错误。有关更多信息，请参见 customErrors 元素（ASP.NET 设置架构）。
<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Try
Dim a As Int32
a = Int32.Parse(TextBox1.Text)
Dim b As Int32
b = Int32.Parse(TextBox2.Text)
Dim res As Int32 = a / b
Label1.Text = res.ToString()
Catch ex As Exception
If (TextBox1.Text.Length > 0 AndAlso TextBox2.Text.Length > 0) Then
ex.Data("ExtraInfo") = " You can't divide " & _
TextBox1.Text & " by " & TextBox2.Text & "."
End If
Throw ex
End Try
End Sub
Protected Sub ScriptManager1_AsyncPostBackError(ByVal sender As Object, ByVal e As System.Web.UI.AsyncPostBackErrorEventArgs)
If (e.Exception.Data("ExtraInfo") <> Nothing) Then
ScriptManager1.AsyncPostBackErrorMessage = _
e.Exception.Message & _
e.Exception.Data("ExtraInfo").ToString()
Else
ScriptManager1.AsyncPostBackErrorMessage = _
"An unspecified error occurred."
End If
End Sub
</script>
<html >
<head id="Head1" runat="server">
<title>UpdatePanel Error Handling Example</title>
<style type="text/css">
#UpdatePanel1 {
width: 200px; height: 50px;
border: solid 1px gray;
}
#AlertDiv{
left: 40%; top: 40%;
position: absolute; width: 200px;
padding: 12px;
border: #000000 1px solid;
background-color: white;
text-align: left;
visibility: hidden;
z-index: 99;
}
#AlertButtons{
position: absolute; right: 5%; bottom: 5%;
}
</style>
</head>
<body id="bodytag">
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1"
OnAsyncPostBackError="ScriptManager1_AsyncPostBackError" runat="server" >
<Scripts>
<asp:ScriptReference Path="ErrorHandling.js" />
</Scripts>
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:TextBox ID="TextBox1" runat="server" Width="39px"></asp:TextBox>
/
<asp:TextBox ID="TextBox2" runat="server" Width="39px"></asp:TextBox>
=
<asp:Label ID="Label1" runat="server"></asp:Label><br />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="calculate" />
</ContentTemplate>
</asp:UpdatePanel>
<div id="AlertDiv">
<div id="AlertMessage">
</div>
<br />
<div id="AlertButtons">
<input id="OKButton" type="button" value="OK" runat="server" onclick="ClearErrorState()" />
</div>
</div>
</div>
</form>
</body>
</html>
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Button1_Click(object sender, EventArgs e)
{
try
{
int a = Int32.Parse(TextBox1.Text);
int b = Int32.Parse(TextBox2.Text);
int res = a / b;
Label1.Text = res.ToString();
}
catch (Exception ex)
{
if (TextBox1.Text.Length > 0 && TextBox2.Text.Length > 0)
{
ex.Data["ExtraInfo"] = " You can't divide " +
TextBox1.Text + " by " + TextBox2.Text + ".";
}
throw ex;
}
}
protected void ScriptManager1_AsyncPostBackError(object sender, AsyncPostBackErrorEventArgs e)
{
if (e.Exception.Data["ExtraInfo"] != null)
{
ScriptManager1.AsyncPostBackErrorMessage =
e.Exception.Message +
e.Exception.Data["ExtraInfo"].ToString();
}
else
{
ScriptManager1.AsyncPostBackErrorMessage =
"An unspecified error occurred.";
}
}
</script>
<html >
<head id="Head1" runat="server">
<title>UpdatePanel Error Handling Example</title>
<style type="text/css">
#UpdatePanel1 {
width: 200px; height: 50px;
border: solid 1px gray;
}
#AlertDiv{
left: 40%; top: 40%;
position: absolute; width: 200px;
padding: 12px;
border: #000000 1px solid;
background-color: white;
text-align: left;
visibility: hidden;
z-index: 99;
}
#AlertButtons{
position: absolute; right: 5%; bottom: 5%;
}
</style>
</head>
<body id="bodytag">
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1"
OnAsyncPostBackError="ScriptManager1_AsyncPostBackError" runat="server" >
<Scripts>
<asp:ScriptReference Path="ErrorHandling.js" />
</Scripts>
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:TextBox ID="TextBox1" runat="server" Width="39px"></asp:TextBox>
/
<asp:TextBox ID="TextBox2" runat="server" Width="39px"></asp:TextBox>
=
<asp:Label ID="Label1" runat="server"></asp:Label><br />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="calculate" />
</ContentTemplate>
</asp:UpdatePanel>
<div id="AlertDiv">
<div id="AlertMessage">
</div>
<br />
<div id="AlertButtons">
<input id="OKButton" type="button" value="OK" runat="server" onclick="ClearErrorState()" />
</div>
</div>
</div>
</form>
</body>
</html>
全球化浏览器中显示的日期和时间
下面的示例演示如何设置 EnableScriptGlobalization 属性，以便客户端脚本可以在浏览器中显示区域性特定的日期和时间。在本例中，@ Page 指令的 Culture 属性设置为 auto。因此，在当前浏览器设置中指定的第一种语言决定了页面的区域性和 UI 区域性。有关更多信息，请参见如何：为 ASP.NET 网页全球化设置区域性和 UI 区域性。
<%@ Page Language="VB" Culture="auto" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html >
<head id="Head1" runat="server">
<title>Globalization Example</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" EnableScriptGlobalization="true" runat="server">
</asp:ScriptManager>
<script type="text/javascript">
function pageLoad() {
Sys.UI.DomEvent.addHandler($get("Button1"), "click", formatDate);
}
function formatDate() {
var d = new Date();
try {
$get('Label1').innerHTML = d.localeFormat("dddd, dd MMMM yyyy HH:mm:ss");
}
catch(e) {
alert("Error:" + e.message);
}
}
</script>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" ChildrenAsTriggers="False" UpdateMode="Conditional">
<ContentTemplate>
<asp:Panel ID="Panel1" runat="server" GroupingText="Update Panel">
<asp:Button ID="Button1" runat="server" Text="Display Date" />
<br />
<asp:Label ID="Label1" runat="server"></asp:Label>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
<%@ Page Language="C#" Culture="auto" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html >
<head id="Head1" runat="server">
<title>Globalization Example</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" EnableScriptGlobalization="true" runat="server">
</asp:ScriptManager>
<script type="text/javascript">
function pageLoad() {
Sys.UI.DomEvent.addHandler($get("Button1"), "click", formatDate);
}
function formatDate() {
var d = new Date();
try {
$get('Label1').innerHTML = d.localeFormat("dddd, dd MMMM yyyy HH:mm:ss");
}
catch(e) {
alert("Error:" + e.message);
}
}
</script>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" ChildrenAsTriggers="False" UpdateMode="Conditional">
<ContentTemplate>
<asp:Panel ID="Panel1" runat="server" GroupingText="Update Panel">
<asp:Button ID="Button1" runat="server" Text="Display Date" />
<br />
<asp:Label ID="Label1" runat="server"></asp:Label>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>