Question

我正在尝试在url上使用string.format将多个值传递给字符串。这可能是一个简单的错误，但我无法使用以下代码。它甚至没有构建字符串。有什么想法吗？

谢谢！

Public Sub getStockData()
    Dim client As New WebClient()
    Dim url As String
    Dim ticker As String = "MSFT"
    Dim lastPrice As String = "l1"
    Dim volume As String = "v0"
    Dim marketCap As String = "j1"
    Dim divYield As String = "x"
    Dim peRatio As String = "r"
    Dim eps As String = "e"

    url = String.Format("http://finance.yahoo.com/d/quotes.csv?s={0}&f={1}{2}{3}{4}{5}{6}", ticker, lastPrice, marketCap, divYield, peRatio, eps)
    Dim results As String = client.DownloadString(url)
    messagebox.show(results)
End Sub

Answer 1

您要插入7个值（格式项{0}至{6}）但仅提供其中的六个：

url = String.Format(
    "http://finance.yahoo.com/d/quotes.csv?s={0}&f={1}{2}{3}{4}{5}{6}", 
    ticker, lastPrice, marketCap, divYield, peRatio, eps)

名为“volume”的变量未被使用...

编辑：使用@SpectralGhost指出的官方MS术语“格式项”！

在vb.net中的url上的string.format

1 个答案: