http:\/\/www.w3.org\/TR\/xhtml1\/DTD\/xhtml1-transitional.dtd<\/a>“><\/p>\n<script runat=”server”><\/p>\n
\u00a0\u00a0\u00a0 Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Label1.Text = WebConfigurationManager.AppSettings(TextBox1.Text)
\n\u00a0\u00a0\u00a0 End Sub<\/p>\n
\u00a0\u00a0\u00a0 Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 If Not Page.IsPostBack Then
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 DropDownList1.DataSource = WebConfigurationManager.AppSettings.Keys
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 DropDownList1.DataBind()
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 TextBox2.Text = WebConfigurationManager.AppSettings(DropDownList1.SelectedValue)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 End If
\n\u00a0\u00a0\u00a0 End Sub<\/p>\n
\u00a0\u00a0\u00a0 Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 TextBox2.Text = WebConfigurationManager.AppSettings(DropDownList1.SelectedValue)
\n\u00a0\u00a0\u00a0 End Sub<\/p>\n
\u00a0\u00a0\u00a0 Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ‘1, \u5beb\u5165Runtimeg\u8a2d\u5b9a
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ‘WebConfigurationManager.AppSettings.Set(DropDownList1.SelectedValue, TextBox2.Text)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ‘2, \u4fee\u6539Web.config
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ‘2-1, \u958b\u555fweb.config
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Dim cfg As System.Configuration.Configuration = WebConfigurationManager.OpenWebConfiguration(Request.ApplicationPath)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ‘2-2, \u4fee\u6539\u8a2d\u5b9a
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 cfg.AppSettings.Settings(DropDownList1.SelectedValue).Value = TextBox2.Text
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ‘2-3, \u5b58\u6a94
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 cfg.Save()
\n\u00a0\u00a0\u00a0 End Sub<\/p>\n
\u00a0\u00a0\u00a0 Protected Sub Button3_Click(ByVal sender As Object, ByVal e As System.EventArgs)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ‘1, \u958b\u555fweb.config
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Dim cfg As System.Configuration.Configuration = WebConfigurationManager.OpenWebConfiguration(Request.ApplicationPath)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ‘2, \u53d6\u5f97appSettings\u8a2d\u5b9a\u5340\u6bb5
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Dim cs As ConfigurationSection = cfg.GetSection(“appSettings”)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ‘3, \u5224\u65b7\u662f\u5426\u6709\u52a0\u5bc6\u904e, \u4ee5\u6c7a\u5b9a\u52a0\u5bc6\u6216\u89e3\u5bc6
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 If cs.SectionInformation.IsProtected Then
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 cs.SectionInformation.UnprotectSection()
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Response.Write(“\u5df2\u89e3\u5bc6…”)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Else
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 cs.SectionInformation.ProtectSection(“DataProtectionConfigurationProvider”)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Response.Write(“\u5df2\u52a0\u5bc6…”)
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 End If
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ‘4, \u5b58\u6a94
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 cfg.Save()
\n\u00a0\u00a0\u00a0 End Sub
\n<\/script><\/p>\n
<html xmlns=”http:\/\/www.w3.org\/1999\/xhtml<\/a>” >
\n<head runat=”server”>
\n\u00a0\u00a0\u00a0 <title>Untitled Page<\/title>
\n<\/head>
\n<body>
\n\u00a0\u00a0\u00a0 <form id=”form1″ runat=”server”>
\n\u00a0\u00a0\u00a0 <div>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 key :
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <asp:TextBox ID=”TextBox1″ runat=”server”><\/asp:TextBox>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <asp:Button ID=”Button1″ runat=”server” OnClick=”Button1_Click” Text=”Get Value” \/>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <asp:Label ID=”Label1″ runat=”server” Text=”Label”><\/asp:Label><br \/>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <br \/>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <br \/>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 keys :
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <asp:DropDownList ID=”DropDownList1″ runat=”server” AutoPostBack=”True” OnSelectedIndexChanged=”DropDownList1_SelectedIndexChanged”>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/asp:DropDownList>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <asp:TextBox ID=”TextBox2″ runat=”server”><\/asp:TextBox>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <asp:Button ID=”Button2″ runat=”server” Text=”\u4fee\u6539” OnClick=”Button2_Click” \/>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <asp:Button ID=”Button3″ runat=”server” OnClick=”Button3_Click” Text=”\u52a0\u5bc6\/\u89e3\u5bc6” \/><\/div>
\n\u00a0\u00a0\u00a0 <\/form>
\n<\/body>
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