本文整理汇总了C#中System.String.Substring方法的典型用法代码示例。如果您正苦于以下问题：C# String.Substring方法的具体用法？C# String.Substring怎么用？C# String.Substring使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.String的用法示例。
在下文中一共展示了String.Substring方法的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: foreach
string [] info = { "Name: Felica Walker", "Title: Mz.",
"Age: 47", "Location: Paris", "Gender: F"};
int found = 0;
Console.WriteLine("The initial values in the array are:");
foreach (string s in info)
Console.WriteLine(s);
Console.WriteLine("\nWe want to retrieve only the key information. That is:");
foreach (string s in info)
{
found = s.IndexOf(": ");
Console.WriteLine(" {0}", s.Substring(found + 2));
}输出：
The initial values in the array are: Name: Felica Walker Title: Mz. Age: 47 Location: Paris Gender: F We want to retrieve only the key information. That is: Felica Walker Mz. 47 Paris F
示例2: foreach
String[] pairs = { "Color1=red", "Color2=green", "Color3=blue",
"Title=Code Repository" };
foreach (var pair in pairs)
{
int position = pair.IndexOf("=");
if (position < 0)
continue;
Console.WriteLine("Key: {0}, Value: '{1}'",
pair.Substring(0, position),
pair.Substring(position + 1));
}输出：
Key: Color1, Value: 'red' Key: Color2, Value: 'green' Key: Color3, Value: 'blue' Key: Title, Value: 'Code Repository'
示例3:
String value = "This is a string.";
int startIndex = 5;
int length = 2;
String substring = value.Substring(startIndex, length);
Console.WriteLine(substring);输出：
is
示例4:
String myString = "abc";
bool test1 = myString.Substring(2, 1).Equals("c"); // This is true.
Console.WriteLine(test1);
bool test2 = String.IsNullOrEmpty(myString.Substring(3, 0)); // This is true.
Console.WriteLine(test2);
try
{
string str3 = myString.Substring(3, 1); // This throws ArgumentOutOfRangeException.
Console.WriteLine(str3);
}
catch (ArgumentOutOfRangeException e)
{
Console.WriteLine(e.Message);
}输出：
True True Index and length must refer to a location within the string. Parameter name: length
示例5:
String s = "aaaaabbbcccccccdd";
Char charRange = 'b';
int startIndex = s.IndexOf(charRange);
int endIndex = s.LastIndexOf(charRange);
int length = endIndex - startIndex + 1;
Console.WriteLine("{0}.Substring({1}, {2}) = {3}",
s, startIndex, length,
s.Substring(startIndex, length));输出：
aaaaabbbcccccccdd.Substring(5, 3) = bbb
示例6:
String s = "<term>extant<definition>still in existence</definition></term>";
String searchString = "<definition>";
int startIndex = s.IndexOf(searchString);
searchString = "</" + searchString.Substring(1);
int endIndex = s.IndexOf(searchString);
String substring = s.Substring(startIndex, endIndex + searchString.Length - startIndex);
Console.WriteLine("Original string: {0}", s);
Console.WriteLine("Substring; {0}", substring);输出：
Original string:extant Substring;still in existence still in existence