I have some sentences like below :
i have a river
he is liar
great
hello miss
there was a river in this area
Now i want to extract last 10 characters and have this result
ve a river
he is liar
great
hello miss
this area
I have tried to achieve the desired result using this
mystring.Substring(mystring.Length - 10)
The above code works fine for the strings of length higher than 9, but fails for great
How to overcome this problem using fewest line of vb.net code?
您需要使用Math.Min限制子字符串,以便它可以从字符串中获取10或尽可能多的子字符串。
mystring.Substring(mystring.Length - Math.Min(10, mystring.Length))
The Strings.Right Method will do what you want.
Dim ss = {"i have a river", "he is liar", "great", "hello miss", "there was a river in this area"}
For Each s In ss
Console.WriteLine(Strings.Right(s, 10))
Next
Outputs:
ve a river
he is liar
great
hello miss
this area
I assume that the missing space at the start of the last string was a transcription error in the question.
你可以反转字符串(将其转换为字符数组),从start开始取10个字符,然后将其反转并通过连接数组转换为字符串。
String.Join("", mystring.Reverse().Take(10).Reverse())
Microsoft.VisualBasic.Strings.Right(mystring, 10)
Another simple but efficient solution i found :
mystring.Substring(Math.Max(0, mystring.Length - 10))
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