Question

我正在尝试映射两个StringBuilders：

string builder1 ="abc1,abc2,abc3,abc4,abc2"
string builder2="100,30,15,102,30"

两个StringBuilders计数都是相同的并且已经映射。但我正在搜索特定号码30并命名为abc2

即find(30,abc2)并将其删除

所以我需要跟踪逗号，或者有人建议我最好的做法是删除我不想要的字符串。

Answer 1

不使用正则表达式，可能更容易将字符串转换为列表，删除项目，然后重新创建列表：

StringBuilder sb1 = new StringBuilder("abc1,abc2,abc3,abc4,abc2");
string find1 = "abc2";
var newList = sb1.ToString().Split(',').ToList();
newList.RemoveAll(x => x == find1);
string result = string.Join(",", newList.ToArray());

对于VB.Net版本：

Dim sb1 As New StringBuilder("abc1,abc2,abc3,abc4,abc2")
Dim find1 As String = "abc2"
Dim newList As New List(Of String)(sb1.ToString().Split(","c).ToList)
newList.RemoveAll(Function(x) x = find1)
Dim result As String = String.Join(",", newList.ToArray())

Answer 2

所以我看到4个案例：

等于"abc2"（似乎非常不可能）
包含",abc2,"
以"abc2,"
以",abc2"

Sub removeCSVvalue(sb As StringBuilder, value$)
    If sb.Length <= value.Length Then sb.Replace(value, vbNullString) : Return ' If sb = value
    sb.Replace("," & value & ",", ",")   ' Example: replace ",abc2," with ","
    Dim C = value.Length
    If sb.Length > C Then If sb(C) = "," Then If sb.ToString(0, C) = value Then sb.Remove(0, C + 1) ' If sb.StartsWith(value & ",")
    Dim L = sb.Length - C
    If sb.Length > C Then If sb(L - 1) = "," Then If sb.ToString(L, C) = value Then sb.Length = L - 1 ' If sb.EndsWith("," & value)
End Sub

P.S。这让我想起了我的第一个低估答案Remove item from string array：]

StringBuilder计算逗号并查找位置

2 个答案: