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public string SHA1Encypt(string SourceString)
{
SHA1 sha = new SHA1CryptoServiceProvider();
//将SourceString转换成byte[]
ASCIIEncoding enc = new ASCIIEncoding();
byte[] dataToHash = enc.GetBytes(SourceString);
//Hash运算
byte[] dataHashed = sha.ComputeHash(dataToHash);
//将运算结果转换成string
string hash = BitConverter.ToString(dataHashed).Replace("-", "");
return hash;
}