HttpRequest.Params 属性

最新推荐文章于 2024-07-03 02:45:27 发布

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最新推荐文章于 2024-07-03 02:45:27 发布

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文章标签： c# c/c++

本文详细介绍了HttpRequest.Params属性的使用方法，该属性可用于获取页面请求中的QueryString、Form、ServerVariables和Cookies等项的组合集合。提供了Visual Basic和C#两种语言的示例代码，展示了如何遍历并展示这些参数。

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HttpRequest.Params 属性

获取 QueryString、Form、ServerVariables 和 Cookies 项的组合集合。

命名空间:System.Web
程序集:System.Web（在 system.web.dll 中）

语法

Visual Basic（声明）

Public ReadOnly Property Params As NameValueCollection

Visual Basic（用法）

Dim instance As HttpRequest
Dim value As NameValueCollection

value = instance.Params

public NameValueCollection Params { get; }

C++

public:
property NameValueCollection^ Params {
    NameValueCollection^ get ();
}

/** @property */
public NameValueCollection get_Params ()

JScript

public function get Params () : NameValueCollection

属性值

一个 NameValueCollection 对象。

示例

下面的代码示例循环访问页的 Params 属性，并在页上显示各项及相应的值。

Visual Basic

复制代码

<%@ Page Language="VB" %>
<script runat="server">

    Private Sub Page_Load(sender As Object, e As EventArgs)

        ' Create a string to contain the paramaters'
        ' information.
        Dim paramInfo As String = ""

        Dim i, j As Integer

        ' Obtain a reference to the Request.Params
        ' collection.
        Dim pColl As NameValueCollection = Request.Params

        ' Iterate through the collection and add
        ' each key to the string variable.
        For i = 0 To pColl.Count - 1

            paramInfo += "Key: " + pColl.GetKey(i) + "<br>"

            ' Create a string array that contains
            ' the values associated with each key.
            Dim pValues() As String  = pColl.GetValues(i)

            ' Iterate through the array and add
            ' each value to the string variable.
            For j = 0 To pValues.Length - 1

                paramInfo += "Value:" + pValues(j) + "<br><br>"

            Next j
        Next i

        ' Set a Label's Text property to the values
        ' contained in the string variable.
        lblValues.Text = paramInfo
    End Sub

</script>
<html>
<head>
</head>
<body>
    <form runat="server">
        <asp:Label id="lblValues" runat="server" />
    </form>
</body>
</html>

复制代码

<%@ Page Language="C#"%>
<script runat="server">

    private void Page_Load(object sender, EventArgs e)
    {
        // Create a string to contain the paramaters'
        // information.
        string paramInfo = "";

        // Obtain a reference to the Request.Params
        // collection.
        NameValueCollection pColl = Request.Params;

        // Iterate through the collection and add
        // each key to the string variable.
        for(int i = 0; i <= pColl.Count - 1; i++)
        {
            paramInfo += "Key: " + pColl.GetKey(i) + "<br>";

            // Create a string array that contains
            // the values associated with each key.
            string[] pValues = pColl.GetValues(i);

            // Iterate through the array and add
            // each value to the string variable.
            for(int j = 0; j <= pValues.Length - 1; j++)
            {
                paramInfo += "Value:" + pValues[j] + "<br><br>";

            }
        }

        // Set a Label's Text property to the values
        // contained in the string variable.
        lblValues.Text = paramInfo;
    }

</script>
<html>
<head>
</head>
<body>
    <form runat="server">
        <asp:Label id="lblValues" runat="server" />
    </form>
</body>
</html>

.NET Framework 安全性

AspNetHostingPermission 用于在宿主环境中进行操作。要求值：Demand；权限值：Low。

平台

Windows 98、Windows 2000 SP4、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition

.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。

版本信息