vb.net 将保存的数字字符串转换为整数数组
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convert saved string of numbers into an array of integers
提问by user2835653
i have a comma separated string of numbers inside of a var named num_str
我在名为 num_str 的 var 中有一个逗号分隔的数字字符串
the contents of num_str looks like this: "1,2,3,4,5" etc
num_str 的内容如下所示：“1,2,3,4,5”等
i am looking for a way to add num_str to an expression to convert the sting of numbers contained therein to an array of integers
我正在寻找一种将 num_str 添加到表达式的方法，以将其中包含的数字串转换为整数数组
i want to make sure i can simply reference 'num_str' to get the numbers from instead of spelling it out like {"1,2,3,4,5"}
我想确保我可以简单地引用 'num_str' 来获取数字，而不是像 {"1,2,3,4,5"} 那样拼写出来
i have tried this, where 'num_str' contains the numbers
我试过这个，其中 'num_str' 包含数字
Dim test As String = Nothing
Dim result() As Integer = Int32.TryParse(num_str.Split(","c))
For i = 0 To result.Length - 1
test += result(i)
Next
but that doesn't work
但这不起作用
what i am looking for is a result with an array of numbers
我正在寻找的是带有数字数组的结果
回答by jcwrequests
Dim totalValue = str.
Split(","c).
Select(Function(n) Integer.Parse(n)).
Sum()
回答by huMpty duMpty
Try this to create integer array
试试这个来创建整数数组
Dim numbers = str.Split(","c).[Select](Function(n) Integer.Parse(n)).ToList()
Then you can use the loop you are using at the moment to append value to string
然后您可以使用您目前使用的循环将值附加到字符串
回答by srka
You can do it like this:
你可以这样做：
Dim num_str As String = ...
Dim str() As String = num_str.Split(",")
Dim result(str.Length - 1) As Integer
For i = 0 To str.Length - 1
result(i) = str(i)
Next
回答by Chris Baxter
I was just working on this for a client, and I found an elegant little piece of code that will replace your single string value and effectively convert it to integer (or more precisely "double") very easily, and can be used for "find and convert" just as easily. I wrote a bunch of these into a GPA calculator that changes the letter grade entered into the GPA number format for math conversion and display without anything else but these three lines and a little loop.
我只是在为一个客户处理这个问题，我发现了一段优雅的小代码，可以很容易地替换你的单个字符串值并有效地将它转换为整数（或更准确地说是“双精度”），并且可以用于“查找并转换”同样容易。我将其中的一堆写入 GPA 计算器，该计算器将输入的字母等级更改为 GPA 数字格式以进行数学转换和显示，除了这三行和一个小循环外，没有其他任何东西。
For m = 0 To UBound(myArray)
myArray(m) = Replace(myArray(m), "thisstring", 0.0) 'integer 0.0 can be any
Next m
