看起来像查询字符串，但不会充当查询字符串

发布于 2024-12-15 13:38:02 字数 500 浏览 7 评论 0原文

我正在 asp.net 中使用 VB，

基本问题是，我想将字符串中的元素配对，就像 request.QueryString() 对查询字符串中的元素所做的那样网页。

然而，我希望它不是查看当前网页查询字符串的函数，而是查看存储为变量的字符串（即查询字符串的精确形式）。

因此，如果我定义一个字符串，例如：

Dim LooksLikeAQueryString As String = "?category1=answer1&category2=answer2"

我想要一个函数，如果我输入 LooksLikeAQueryString 和“category1”，它会输出“answer1”等。

是否有任何东西已经可以做到这一点，或者我必须构建我自己的功能？如果我必须自己构建，有什么建议吗？

我应该补充一点，在这种情况下，我将无法将字符串附加到 url，然后运行 request.QueryString。

原文

I am working with VB in asp.net,

The basic problem is, I want to pair up the elements in a string, exactly like request.QueryString() will do to the elements in the query string of the web page.

However instead of the function looking at the current webpage query string I want it to look at a string (that is in the exact form of a query string) stored as a variable.

So if I define a string such as:

Dim LooksLikeAQueryString As String = "?category1=answer1&category2=answer2"

I want a function that if I input LooksLikeAQueryString and "category1" it outputs "answer1" etc.

Is there anything that can already do this or do I have to build my own function? If I have to build my own, any tips?

I should add that in this case I won't be able to append the string to the url and then run request.QueryString.

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淑女气质 2024-12-22 13:38:02

您可以使用 HttpUtility.ParseQueryString 方法 - MSDN 链接

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乖乖公主 2024-12-22 13:38:02

ParseQueryString 将为您做这件事 - 类似以下内容：

Private Function QueryStringValue(queryString As String, key As String) As String
    Dim qscoll As NameValueCollection = HttpUtility.ParseQueryString(queryString)
    For Each s As String In qscoll.AllKeys
        If s = key Then Return qscoll(s)
    Next
    Return Nothing
End Function

用法：

    Dim LooksLikeAQueryString As String = "?category1=answer1&category2=answer2"
    Response.Write(QueryStringValue(LooksLikeAQueryString, "category2"))

ParseQueryString will do it for you - something along these lines:

Private Function QueryStringValue(queryString As String, key As String) As String
    Dim qscoll As NameValueCollection = HttpUtility.ParseQueryString(queryString)
    For Each s As String In qscoll.AllKeys
        If s = key Then Return qscoll(s)
    Next
    Return Nothing
End Function

Usage:

    Dim LooksLikeAQueryString As String = "?category1=answer1&category2=answer2"
    Response.Write(QueryStringValue(LooksLikeAQueryString, "category2"))

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深陷 2024-12-22 13:38:02

如果你不想依赖 System.Web，我的想法

public string GetValue(string fakeQueryString,string key)
{
    return fakeQueryString.Replace("?",String.Empty).Split('&')
        .FirstOrDefault(item=>item.Split('=')[0] == key);
}

If you dont want the dependancy of System.Web, of the top of my head

public string GetValue(string fakeQueryString,string key)
{
    return fakeQueryString.Replace("?",String.Empty).Split('&')
        .FirstOrDefault(item=>item.Split('=')[0] == key);
}

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