是否有一种简单的方法可以删除字符串中的前2个字符和后2个字符?
我有这个字符串:
\nTESTSTRING\n
我怎么能轻易删除它们?
答案 0 :(得分:47)
str = str.Substring(2,str.Length-4)
当然,在执行此操作之前,您必须测试该字符串是否包含4个以上的字符。在你的情况下,似乎\ n是一个换行符。如果您只想删除前导和尾随空格,则应使用
str.Trim()
根据查尔斯的建议
答案 1 :(得分:6)
// Test string
var str = "\nTESTSTRING\n";
// Number of characters to remove on each end
var n = 2;
// Slimmed string
string slimmed;
if (str.Length > n * 2)
slimmed = str.Substring(n, str.Length - (n * 2));
else
slimmed = string.Empty;
// slimmed = "ESTSTRIN"
答案 2 :(得分:5)
你有没有尝试过:
myString.Trim();
答案 3 :(得分:2)
myString = myString.SubString(2, myString.Length - 4);
答案 4 :(得分:0)
Papuccino1,
如果您创建这样的扩展方法:
public static class StringEnumerator {
public static IEnumerable<String> GetLines(this String source) {
String line = String.Empty;
StringReader stringReader = new StringReader(source);
while ((line = stringReader.ReadLine()) != null) {
if (!String.IsNullOrEmpty(line)) {
yield return line;
}
}
}
}
您的代码将被简化并且更安全(不依赖于危险索引):
class Program {
static void Main(string[] args) {
String someText = "\nTESTSTRING\n";
String firstLine = someText.GetLines().First();
}
}
我希望这有帮助,
Ricardo Lacerda Castelo Branco
答案 5 :(得分:0)
public string RemoveFirstCharFromString(string Text)
{
string[] arr1 = new string[] { "The ", "A " };
string Original = Text.ToLower();
if (Text.Length > 4)
{
foreach (string match in arr1)
{
if (Original.StartsWith(match.ToLower()))
{
//Original = Original.Replace(match.ToLower(), "").TrimStart();
Original = Original.Replace(Original.Substring(0, match.Length), "").TrimStart();
return Original;
}
}
}
return Original;
}
答案 6 :(得分:0)
string Origional = TextBox1.Text.Replace(TextBox1.Text.Substring(0, 2), "");
Origional += Origional.Replace(Origional.Substring((Origional.Length - 2), 2), "");
答案 7 :(得分:0)
使用Substring
和Remove
方法简单,详见this link:
string mystring = "122014";
mystring = mystring.Substring(mystring.Length - 4);
Response.Write(mystring.ToString());
//output:2014
mystring = "122014";
string sub = mystring.Remove(mystring.Length - 4);
Response.Write("<br>");
Response.Write(sub.ToString());
//output: 12