vb.net 在VB.NET中将字符串数组转换为双数组
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Convert string array to double array in VB.NET
提问by bluebox
I have a string "TextLine" that contains doubles and integers. Now I want to split the string into its parts and convert the resulting string array to double. Unfortunately I get an overload resolution error (for "parse") when I try to do that. What am I doing wrong?
我有一个包含双精度和整数的字符串“TextLine”。现在我想将字符串拆分成它的部分并将结果字符串数组转换为双精度。不幸的是，当我尝试这样做时，我得到了一个重载解析错误（对于“解析”）。我究竟做错了什么？
Dim doubleAry As Double() = Array.ConvertAll(TextLine.Split(vbTab), [Double].Parse)
回答by Steven Doggart
You can do it like this:
你可以这样做：
Dim doubleAry As Double() = Array.ConvertAll(TextLine.Split(vbTab), New Converter(Of String, Double)(AddressOf Double.Parse))
However, if the string array that you are giving it contains any invalid items, that will throw an exception and fail to convert any of the items. If you want to handle invalid items and just default them to 0, you could implement your own converter, like this:
但是，如果您提供给它的字符串数组包含任何无效项目，则会引发异常并且无法转换任何项目。如果您想处理无效项目并将它们默认为 0，您可以实现自己的转换器，如下所示：
Private Function DoubleConverter(ByVal text As String) As Double
Dim value As Double = 0
Double.TryParse(text, value)
Return value
End Function
Then, you can use it like this:
然后，您可以像这样使用它：
Dim doubleAry As Double() = Array.ConvertAll(TextLine.Split(vbTab), New Converter(Of String, Double)(AddressOf DoubleConverter))
