我有这个我需要解码的网址:
http://gistest:54321/default.aspx?data=%7B%22id%22:%2269403%22,%22longitude%22:%22-143.406417%22,%22latitude%22:%2232.785834%22,%22timestamp%22:%2223-10%2010:12%22%7D
此代码每次都会更改
我使用此代码:
<%Response.Write(Request.QueryString.Item("data") )%><br/>
<%Response.Write(Request.QueryString.Item("id") )%><br/>
<%Response.Write(Request.QueryString.Item("longitude") )%><br/>
<%Response.Write(Request.QueryString.Item("latitude") )%><br/>
<%Response.Write(Request.QueryString.Item("timestamp") )%><br/>
但我只把它作为输出,也许有一个选项可以检查数据是否为空,然后我request.querystring数据中的其他部分:
{"id"="69403","longitude"="-143.406417","latitude"="32.785834","timestamp"="23-10 10:12"}
这是来自
&lt;%Response.Write(Request.QueryString.Item(“data”))%&gt;
答案 0 :(得分:1)
我认为您遇到的问题是您发布的网址中只有一个查询字符串参数,即data
。其余信息以data
查询字符串值编码。存储在data
中的值几乎看起来像JSON / Javascript对象,但属性名称和值之间只有=
而不是:
。
因此,基本上您无法使用Request.QueryString
来获取id
,longitude
,latitude
等的值。我认为您的选择是编写一些代码来自己解析data
的值或用=
替换:
并使用.NET的JSON解析器(即JavascriptSerializer
类或{{ 1}})。
就个人而言,我会在代码隐藏中编写一个返回JSON.net
的方法。在该方法中,我只需将每个Dictionary(Of String, Object)
更改为"="
,然后使用.NET提供的":"
来解析字符串。我现在没有方便的ASP.NET实例,但是我在LinqPad中汇总的以下示例应该说明这个想法:
JavaScriptSerializer
关于这种方法需要注意的一点是,我希望网址与您发布的网址格式相同。您可能需要修改此方法以使其更加健壮以处理不同的输入。
如果您将Sub Main
Dim url = "http://gistest:54321/default.aspx?data=%7B%22id%22=%2269403%22,%22longitude%22=%22-143.406417%22,%22latitude%22=%2232.785834%22,%22timestamp%22=%2223-10%2010:12%22%7D"
Dim uri = New Uri(url)
Dim data = System.Web.HttpUtility.ParseQueryString(uri.Query)("data")
Dim o = ParseData(data)
Console.WriteLine(o("id"))
Console.WriteLine(o("longitude"))
Console.WriteLine(o("latitude"))
Console.WriteLine(o("timestamp"))
End Sub
Function ParseData(data As String) As Dictionary(Of String, Object)
Dim js = new System.Web.Script.Serialization.JavaScriptSerializer()
Dim o = js.DeserializeObject(data.Replace("""=""", """:"""))
ParseData = DirectCast(o, Dictionary(Of String, Object))
End Function
功能放入代码隐藏中,那么首页中的以下代码应该为您提供所需的输出(再次,抱歉,我不知道)现在要测试一个ASP.NET实例):
ParseData
答案 1 :(得分:1)
我真的希望我能正确理解这个问题。我假设你需要在名为Data的查询字符串键中的每个键的值?为此,我使用了以下代码:
Dim values() As String = Server.UrlDecode(Request.QueryString("data")).Replace("{", "").Replace("}", "").Split(New Char() {","}, StringSplitOptions.RemoveEmptyEntries)
For Each value As String In values
Dim keyValue() As String = value.Split(New Char() {":"}, StringSplitOptions.RemoveEmptyEntries)
Response.Write(keyValue(0).Replace("""", "") & " : " & keyValue(1).Replace("""", "") & "<br/>")
Next
简而言之,我解码QueryString(“data”),替换大括号并使用逗号作为第一个拆分字符将字符串拆分为数组。然后,我们得到一个包含以下格式“id”的值的数组:“649403”。
此后,我遍历这些值,并根据分号(:)字符为每个值分割最后一次。
使用此方法,您可以动态构建和操作数据。
代码编辑
我将“:”的所有引用替换为“=”,以确保正确检索时间戳,然后根据=拆分键值。如有必要,您可以使用选择案例将值分配给值。 (显然要确保你的变量没有在select中声明,因为它不在适当的范围内供以后使用!)
If Request.QueryString("data") IsNot Nothing Then
Dim values() As String = Request.QueryString("data").Replace("{", "").Replace("}", "").Replace(""":""", """=""").Split(New Char() {","}, StringSplitOptions.RemoveEmptyEntries)
For Each value As String In values
Dim keyValue() As String = value.Split(New Char() {"="}, StringSplitOptions.RemoveEmptyEntries)
Response.Write(keyValue(0).Replace("""", "") & " : " & keyValue(1).Replace("""", "") & "<br/>")
Select Case keyValue(0).ToLower()
Case "id"
Dim id As String = keyValue(1)
End Select
Next
End If
反思编辑
创建对象的实例,然后检索其所有属性(Dim properties()As PropertyInfo = myObj.GetType()。GetProperties())。遍历属性并设置名称等于键的值。不要忘记导入System.Reflection库。
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim data As String = "%7B%22id%22:%2269403%22,%22longitude%22:%22-143.406417%22,%22latitude%22:%2232.785834%22,%22timestamp%22:%2223-10%2010:12%22%7D"
If data IsNot Nothing Then
Dim myObj As New MyObject
Dim properties() As PropertyInfo = myObj.GetType().GetProperties()
Dim values() As String = Server.UrlDecode(data).Replace("{", "").Replace("}", "").Replace(""":""", """=""").Split(New Char() {","}, StringSplitOptions.RemoveEmptyEntries)
For Each value As String In values
Dim keyValue() As String = value.Split(New Char() {"="}, StringSplitOptions.RemoveEmptyEntries)
For Each prop As PropertyInfo In properties
If prop.Name.ToLower = keyValue(0).ToLower.Replace("""", "") Then
prop.SetValue(myObj, keyValue(1), Nothing)
End If
Next
Next
myObj.Save()
End If
End Sub
Public Class MyObject
Private _ID As String
Private _Longitude As String
Private _Latitude As String
Private _Timestamp As String
Public Property ID As String
Get
Return _ID
End Get
Set(value As String)
_ID = value
End Set
End Property
Public Property Longitude As String
Get
Return _Longitude
End Get
Set(value As String)
_Longitude = value
End Set
End Property
Public Property Latitude As String
Get
Return _Latitude
End Get
Set(value As String)
_Latitude = value
End Set
End Property
Public Property Timestamp As String
Get
Return _Timestamp
End Get
Set(value As String)
_Timestamp = value
End Set
End Property
Public Sub Save()
'Save logic here
End Sub
End Class