类型转换

string,byte[] 转换

byte[] byt = (byte[])ds.Tables[0].Rows[0]["ImageByte"];

c#中分割字符串

1种

string s="abcdeabcdeabcde";
string[] sArray=s.Split('c');
foreach(string i in sArray)
Console.WriteLine(i.ToString());

2种

string s="abcdeabcdeabcde
string[] sArray1=s.Split(new char[3]{'c','d','e'});
foreach(string i in sArray1)
Console.WriteLine(i.ToString());
3种

先添加 using System.Text.RegularExpressions;

System.Text.RegularExpressions
string content="agcsmallmacsmallgggsmallytx";
string[]resultString=Regex.Split(content,"small",RegexOptions.IgnoreCase)
foreach(string i in resultString)
Console.WriteLine(i.ToString());

//我是一个老师

string str1="我*****是*****一*****个*****教*****师;
string[] str2;
str1=str1.Replace("*****","*");
str2=str1.Split('*');
foreach(string i in str2)
Console.WriteLine(i.ToString());

string str1="我**是*****一*****个*****教*****师";
string[] str2 = System.Text.RegularExpressions.Regex.Split(str1,@"[*]+");
foreach(string i in str2)
Console.WriteLine(i.ToString());