1
3社から最新の株価を取得しようとしていますが、数字を正しく取得できないようです。私はGoogleのファイナンスをこすり、私はこれに似たオブジェクトを取得したシンボルを取得することができます：Google Financial JSON文字列を逆シリアル化する
// [ { "id": "983582" ,"t" : ".DJI" ,"e" : "INDEXDJX" ,"l" : "18,051.10" ,"l_fix" : "18051.10" ,"l_cur" : "18,051.10" ,"s": "0" ,"ltt":"3:15PM EDT" ,"lt" : "Sep 13, 3:15PM EDT" ,"lt_dts" : "2016-09-13T15:15:39Z" ,"c" : "-273.97" ,"c_fix" : "-273.97" ,"cp" : "-1.50" ,"cp_fix" : "-1.50" ,"ccol" : "chr" ,"pcls_fix" : "18325.07" } ]
と、私は「18,051.10」である第四コロン、後にアイテムを取得し、残りを無効にして置くしようとしていますその二重の値を配列に戻すことができますので、ラベルに表示することはできますが運はありません。私は、会社の株価グラフの履歴を返すサンプルプログラムを練習しようとしているnoobプログラマーですが、ただ最新の見積もりを返すだけです。
Imports System.Net
Imports System.IO
Imports System.Drawing.Drawing2D
Public Class Form1
' The ticker symbols.
Private Symbols As List(Of String) = Nothing
' The current prices.
Private Prices() As List(Of Single) = Nothing
' Redraw the graph.
'Private Sub picGraph_Resize(ByVal sender As Object, ByVal e As System.EventArgs)
' DrawGraph()
'End Sub
' Get the closing prices and graph them.
Private Sub btnGo_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGo.Click
Me.Cursor = Cursors.WaitCursor
' Get the ticker symbols.
'Dim symbols_text() As String = txtSymbols.Text.Split(","c)
Dim symbols_text() As String = {"PKG", "TEN", "INDU"}
Symbols = New List(Of String)()
For i As Integer = 0 To symbols_text.Length - 1
Symbols.Add(symbols_text(i).Trim())
Next i
' Get the data.
ReDim Prices(0 To Symbols.Count - 1)
For i As Integer = 0 To Symbols.Count - 1
Prices(i) = GetStockPrices(Symbols(i))
Next i
' Graph it.
'DrawGraph()
FillData()
Me.Cursor = Cursors.Default
End Sub
' Get the prices for this symbol.
'Private Function GetStockPrices(ByVal symbol As String) As List(Of Single)
' ' Compose the URL.
' Dim url As String = "http://www.google.com/finance/historical?output=csv&q=" & symbol
' ' Get the result.
' ' Get the web response.
' Dim result As String = GetWebResponse(url)
' ' Get the historical prices.
' Dim lines() As String = result.Split(_
' New String() {vbCr, vbLf}, _
' StringSplitOptions.RemoveEmptyEntries)
' Dim prices As New List(Of Single)()
' ' Process the lines, skipping the header.
' For i As Integer = 1 To lines.Length - 1
' Dim line As String = lines(i)
' prices.Add(Single.Parse(line.Split(","c)(4)))
' Next i
' Return prices
'End Function
Public Function GetStockPrices(symbol As String) As List(Of Single)
' Dim pricesArray() As String
Dim prices As New List(Of Single)()
Dim items() As GoogleFinanceItem
If UCase(symbol) = "INDU" Then
Dim url As String = "http://finance.google.com/finance/info?client=ig&q=INDEXDJX%3A.DJI"
Dim result As String = GetWebResponse(url)
' Dim newResult = result.Substring(1, result.Length - 1)
items = JsonConvert.DeserializeObject(Of GoogleFinanceItem())(result)
' pricesArray = Split(result, ":")
Else
Dim url As String = "http://finance.google.com/finance/info?client=ig&q=" & UCase(symbol)
Dim result As String = GetWebResponse(url)
' Dim newResult = result.Substring(1, result.Length - 1)
items = JsonConvert.DeserializeObject(Of GoogleFinanceItem())(result)
' pricesArray = Split(result, ":")
End If
' pricesArray = Split(pricesArray(4), """")
' prices.Add(CSng(Format(pricesArray(1), "0.00")))
'prices.Add(CSng(Format(pricesArray(1))))
prices.Add(CSng(items(0).price))
Return prices
End Function
' Get a web response.
Private Function GetWebResponse(ByVal url As String) As String
' Make a WebClient.
Dim web_client As New WebClient()
' Get the indicated URL.
Dim response As Stream = web_client.OpenRead(url)
' Read the result.
Using stream_reader As New StreamReader(response)
' Get the results.
Dim result As String = stream_reader.ReadToEnd()
' Close the stream reader and its underlying stream.
stream_reader.Close()
' Return the result.
Return result
End Using
End Function
Private Sub FillData()
Dim symbolSubSet() As Control = {Label1, Label2, Label3}
Dim priceSubSet() As Control = {Label4, Label5, Label6}
For i = 0 To 2
symbolSubSet(i).Text = Symbols(i)
priceSubSet(i).Text = Prices(i).ToString
Next
End Sub
' Draw the graph.
'Private Sub DrawGraph()
' If (Prices Is Nothing) Then Return
' ' Make the bitmap.
' Dim bm As New Bitmap(_
' picGraph.ClientSize.Width, _
' picGraph.ClientSize.Height)
' Using gr As Graphics = Graphics.FromImage(bm)
' gr.Clear(Color.White)
' gr.SmoothingMode = SmoothingMode.AntiAlias
' ' Get the largest prices.
' Dim max_price As Single = 10
' For Each symbol_prices As List(Of Single) In Prices
' Dim new_max As Single = symbol_prices.Max()
' If (max_price < new_max) Then max_price = new_max
' Next symbol_prices
' ' Scale and translate the graph.
' Dim scale_x As Single = -picGraph.ClientSize.Width/CSng(Prices(0).Count)
' Dim scale_y As Single = -picGraph.ClientSize.Height/max_price
' gr.ScaleTransform(scale_x, scale_y)
' gr.TranslateTransform(_
' picGraph.ClientSize.Width, _
' picGraph.ClientSize.Height, _
' System.Drawing.Drawing2D.MatrixOrder.Append)
' ' Draw the grid lines.
' Using string_format As New StringFormat()
' Using thin_pen As New Pen(Color.Gray, 0)
' For y As Integer = 0 To CInt(max_price) Step 10
' gr.DrawLine(thin_pen, 0, y, Prices(0).Count, y)
' Next y
' For x As Integer = 0 To Prices(0).Count - 1 Step 7
' gr.DrawLine(thin_pen, x, 0, x, 2)
' Next x
' End Using
' End Using
' ' Draw each symbol's prices.
' Dim colors() As Color = {Color.Black, Color.Red, Color.Green, Color.Blue, Color.Orange, Color.Purple}
' For symbol_num As Integer = 0 To Prices.Length - 1
' Dim symbol_prices As List(Of Single) = Prices(symbol_num)
' ' Make the data points.
' Dim points(0 To symbol_prices.Count - 1) As PointF
' For i As Integer = 0 To symbol_prices.Count - 1
' points(i) = New PointF(i, symbol_prices(i))
' Next i
' ' Draw the points.
' Dim clr As Color = colors(symbol_num Mod colors.Length)
' Using thin_pen As New Pen(clr, 0)
' gr.DrawLines(thin_pen, points)
' End Using
' ' Draw the symbol's name.
' DrawSymbolName(gr, Symbols(symbol_num), _
' symbol_prices(symbol_prices.Count - 1), clr)
' Next symbol_num
' End Using
' ' Display the result.
' picGraph.Image = bm
'End Sub
' Draw the text at the specified location.
'Private Sub DrawSymbolName(ByVal gr As Graphics, ByVal txt As String, ByVal y As Single, ByVal clr As Color)
' ' See where the point is in PictureBox coordinates.
' Dim old_transformation As Matrix = gr.Transform
' Dim pt() As PointF = {New PointF(0, y)}
' gr.Transform.TransformPoints(pt)
' ' Reset the transformation.
' gr.ResetTransform()
' ' Draw the text.
' Using small_font As New Font("Arial", 8)
' Using br As New SolidBrush(clr)
' gr.DrawString(txt, small_font, br, 0, pt(0).Y)
' End Using
' End Using
' ' Restore the original transformation.
' gr.Transform = old_transformation
'End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
End Sub
End Class
私も、私はJSONをデシリアライズしようとしていますし、私は結果にJSON文字列をダンプし、デシリアライザにいることを渡すと、次のエラーに
を取得していますGoogleFinanceItemクラスにImports Newtonsoft.Json
Public Class GoogleFinanceItem
Public Property id As String
Public Property t As String
Public Property e As String
Public Property l As String
<JsonProperty("l_fix")>
Public Property price As String
Public Property l_cur As String
Public Property s As String
Public Property ltt As String
Public Property lt As String
Public Property lt_dts As Date
Public Property c As String
Public Property c_fix As String
Public Property cp As String
Public Property cp_fix As String
Public Property ccol As String
Public Property pcls_fix As String
End Class
を持っています
Newtonsoft.Json.dllで 'Newtonsoft.Json.JsonSerializationException'の未処理の例外が発生しました
追加情報：現在のJSONオブジェクトを逆シリアル化できません（例：タイプを正しくデシリアライズするにはタイプにJSON配列（[1,2,3]など）が必要なため、タイプ 'howto_net_graph_stock_history.GoogleFinanceItem []'に{{"name"： "value"}}
このエラーを修正するには、JSON配列をJSON配列（[1,2,3]など）に変更するか、デシリアライズされた型を通常の.NET型に変更します（整数などのプリミティブ型ではありません）。 JSONオブジェクトからデシリアライズできる配列やリストなどのコレクション型）。 JsonObjectAttributeを型に追加して、強制的にJSONオブジェクトから逆シリアル化することもできます。派手な形式の文字列だけではありません
JSONをオブジェクトに逆シリアル化した方がずっと簡単です。 – TyCobb
私はGoogleの逆シリアル化が簡単だと思われる。これを行うためには何をインポートしなければなりませんか？私はこれを試してみたい、他の方法でも比較を見たい – Edgar