ASP.net 2.0 學習如何用戶配置文件(一)

2019-11-17 04:06:02

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概念:PRofile對象提供強類型、可持久化的session狀態表單

Web配置文件節點代碼：<黑白激光傳真一體機>

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<profile>
<properties>
<add name="firstName"/>
<add name="lastName"/>
<add name="numberOfVisits" type="Int32" defaultValue="0"/>
</properties>
</profile>
<profile>
<properties>
<add name="firstName"/>
<add name="lastName"/>
<add name="numberOfVisits" type="Int32" defaultValue="0"/>
</properties>
</profile>

在Web配置文件中定義Profile后，可以使用Profile對象修改其屬性。

asp.net前臺界面調用顯示結果示例代碼：<低速復印機>

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<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Show Profile</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    First Name:
    <asp:Label
        id="lblFirstname"
        Runat="server" />
    <br /><br />
    Last Name:
    <asp:Label
        id="lblLastName"
        Runat="server" />
    <br /><br />
    Number of Visits:
    <asp:Label
        id="lblNumberOfVisits"
        Runat="server" />

    <hr />

    <asp:Label
        id="lblNewFirstName"
        Text="New First Name:"
        AssociatedControlID="txtNewFirstName"
        Runat="server" />
    <asp:TextBox
        id="txtNewFirstName"
        Runat="server" />
    <br /><br />
    <asp:Label
        id="lblNewLastName"
        Text="New Last Name:"
        AssociatedControlID="txtNewLastName"
        Runat="server" />
    <asp:TextBox
        id="txtNewLastName"
        Runat="server" />
    <br /><br />
    <asp:Button
        id="btnUpdate"
        Text="Update Profile"
        OnClick="btnUpdate_Click"
        Runat="server" />

    </div>
    </form>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Show Profile</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    First Name:
    <asp:Label
        id="lblFirstname"
        Runat="server" />
    <br /><br />
    Last Name:
    <asp:Label
        id="lblLastName"
        Runat="server" />
    <br /><br />
    Number of Visits:
    <asp:Label
        id="lblNumberOfVisits"
        Runat="server" />

    <hr />

    <asp:Label
        id="lblNewFirstName"
        Text="New First Name:"
        AssociatedControlID="txtNewFirstName"
        Runat="server" />
    <asp:TextBox
        id="txtNewFirstName"
        Runat="server" />
    <br /><br />
    <asp:Label
        id="lblNewLastName"
        Text="New Last Name:"
        AssociatedControlID="txtNewLastName"
        Runat="server" />
    <asp:TextBox
        id="txtNewLastName"
        Runat="server" />
    <br /><br />
    <asp:Button
        id="btnUpdate"
        Text="Update Profile"
        OnClick="btnUpdate_Click"
        Runat="server" />

    </div>
    </form>
</body>
</html>

ASP.NET后臺屬性賦值示例代碼：

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void Page_PreRender()
{
   lblFirstname.Text = Profile.firstName;
   lblLastName.Text = Profile.lastName;
   Profile.numberOfVisits++;
   lblNumberOfVisits.Text =Profile.numberOfVisits.ToString();
}

protected void btnUpdate_Click(object sender, EventArgs e)
{
   Profile.firstName = txtNewFirstName.Text;
   Profile.lastName = txtNewLastName.Text;
}
void Page_PreRender()
{
   lblFirstname.Text = Profile.firstName;
   lblLastName.Text = Profile.lastName;
   Profile.numberOfVisits++;
   lblNumberOfVisits.Text =Profile.numberOfVisits.ToString();
}

protected void btnUpdate_Click(object sender, EventArgs e)
{
   Profile.firstName = txtNewFirstName.Text;
   Profile.lastName = txtNewLastName.Text;
}

最后理解Profile屬性是持久化的非常重要。如果為一個用戶設置Profile屬性，那么就是該用戶過500年也不會返回網站，屬性也會保留其值。不想Sess狀態。

默認Profile不支持匿名用戶，如果需支持匿名用戶的話，則在WEB配置文件需另外的配置額外的屬性，具體細節，下次馬上更新。

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