C#数据转换

数据转换

//String-------->byte[]
String msg = "";
byte[] buf = Encoding.UTF8.GetBytes(msg);

 

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//byte[]-------->String
byte[] msgA = new byte[len];
int pos = 0;
while(pos!=len)
{
 pos += stream.Read(msgA,pos,len-pos);
}
msgstr =  Encoding.GetEncoding("gb2312").GetString(msgA);

 

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int width = 0;
width = Convert.ToInt32(this.txtImageWidth.Text);

 

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char[] a = {'1','2'};
string s = new string(a);
///////////
string s = "aaaa";
char[] a = s.ToCharArray();

 

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//十进制转二进制

Console.WriteLine(Convert.ToString(69, 2));

 

//十进制转八进制

Console.WriteLine(Convert.ToString(69, 8));

 

//十进制转十六进制

Console.WriteLine(Convert.ToString(69, 16));

 

//二进制转十进制

Console.WriteLine(Convert.ToInt32("100111101", 2));

 

//八进制转十进制

Console.WriteLine(Convert.ToInt32("76", 8));

 

//十六进制转十进制

Console.WriteLine(Convert.ToInt32("FF", 16));

 

//将十进制的43转换成16进制的43

Convert.ToInt32(43.ToSrting(), 16);

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把byte[]转换为int
byte[] lenA = new byte[4];
int len = BitConverter.ToInt32(lenA,0);
把int的四个字节的顺序倒序排列，转为新的int
len = IPAddress.HostToNetworkOrder(len);

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String 转为int
int intnextp = int.Parse(nextp);
int 转为String
nextp = intnext.ToString();

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今天的日期是： System.DateTime.Now.ToLongDateString();

字串到时间：
DateTime datetime = DateTime.Parse( "2003-05-20T11:36:33")

当前时间到字串：
string datetimestr = DateTime.Now.ToString("yyyy-MM-ddTHH:mm:ss")