[英]String Formatting: remove the last underscore and the following characters
我有一個字符串列表
A_1
A_2
A_B_1
X_a_Z_14
我需要刪除最后一個下划線和以下字符。
所以結果列表就像
A
A
A_B
X_a_Z
var data = new List<string> {"A_1", "A_2", "A_B_1", "X_a_Z_14"};
int trimPosition;
for (var i = 0; i < data.Count; i++)
if ((trimPosition = data[i].LastIndexOf('_')) > -1)
data[i] = data[i].Substring(0, trimPosition);
string[] names = {"A_1","A_2","A_B_1","X_a_Z_14" };
for (int i = 0; i < names.Length;i++ )
names[i]= names[i].Substring(0, names[i].LastIndexOf('_'));
var s = "X_a_Z_14";
var result = s.Substring(0, s.LastIndexOf('_') ); // X_a_Z
string s = "X_a_Z_14";
s = s.Substring(0, s.LastIndexOf("_"));
input.Substring(0,input.LastIndexOf("_"));
如果你這么傾向,也有可能使用正則表達式。
Regex regex = new Regex("_[^_]*$"); string[] strings = new string[] {"A_1", "A_2", "A_B_1", "X_a_Z_14"}; foreach (string s in strings) { Console.WriteLine(regex.Replace(s, "")); }
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