vb.net “字符串的一维数组”类型的值无法转换为“字符串”
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Value of type '1-dimensional array of String' cannot be converted to 'String'
提问by Tom Walker
I've been coding a Film Search thing for School, and I've came across this problem and I'm not sure how to solve it.
我一直在为学校编写电影搜索程序，但遇到了这个问题，但我不知道如何解决。
While Not FilmSearcher.EndOfData 'loop until end of file
currentRow = FilmSearcher.ReadFields() 'read in the fields of each line
For j = 0 To 3
Films(i, j) = currentRow(j) 'put the fields into film array
Next
i = i + 1
End While
currentRow = FilmSearcher.ReadFields() is the part that isn't working
currentRow = FilmSearcher.ReadFields() 是不起作用的部分
回答by Steve
If the error message is in your title, then I bet you have declared the currentRow as
如果错误消息在您的标题中，那么我敢打赌您已将 currentRow 声明为
Dim currentRow As String
instead you need to declare it as a 1-dimensional array
相反，您需要将其声明为一维数组
Dim currentRow() as String
回答by Joel Coehoorn
Your currentRowvariable is not declared correctly. Instead of this:
您的currentRow变量未正确声明。取而代之的是：
Dim currentRow As String
You need one of these:
您需要其中之一：
Dim currentRow() As String
Dim currentRow As String()
Which one you choose is a matter of preference. They mean the same thing. You can also avoid the variable entirely:
你选择哪一个是一个偏好问题。他们的意思是一样的。您还可以完全避免使用该变量：
While Not FilmSearcher.EndOfData
'read in the fields of each line and put into film array
Films(i) = FilmSearcher.ReadFields()
i = i + 1
End While
回答by JoshYates1980
In my case, I had declared my method incorrectly to return an array:
就我而言，我错误地声明了我的方法以返回一个数组：
Function GetById(ByVal id As Integer) As String
and the syntax should be:
语法应该是：
Function GetById(ByVal id As Integer) As String()
whereas I can return an array of strings:
而我可以返回一个字符串数组：
Dim arrayOfStrings() As String
arrayOfStrings = {"John", "Josh", "Jason", "Jill", "Kunta Kinte"}
Return arrayOfStrings
