1：配置web.config
<appSettings>
<!-- 连接字符串是否加密 -->
<add key="ConStringEncrypt" value="false"/>
<add key="ConnectionString" value="Data Source=.;Initial Catalog=##;User ID=sa;password=##"/>
<add key="ConnectionString2" value="server=127.0.0.1;database=##;uid=##;pwd=##"/>
<appSettings>
2：得到web.config里配置项的数据库连接字符串。
public class PubConstant
{
/// <summary>
/// 获取连接字符串
/// </summary>
public static string ConnectionString
{
get
{
string _connectionString = ConfigurationManager.AppSettings["ConnectionString"];
string ConStringEncrypt = ConfigurationManager.AppSettings["ConStringEncrypt"];
if (ConStringEncrypt == "true")
{
_connectionString = DESEncrypt.Decrypt(_connectionString);
}
return _connectionString;
}
}
public static string GetConnectionString(string configName)
{
string connectionString = ConfigurationManager.AppSettings[configName];
string ConStringEncrypt = ConfigurationManager.AppSettings["ConStringEncrypt"];
if (ConStringEncrypt == "true")
{
connectionString = DESEncrypt.Decrypt(connectionString);
}
return connectionString;
}
}
3：是否加密
/// <summary>
/// DES加密/解密类。
/// </summary>
public class DESEncrypt
{
public DESEncrypt()
{
}
#region ========加密========
/// <summary>
/// 加密
/// </summary>
/// <param name="Text"></param>
/// <returns></returns>
public static string Encrypt(string Text)
{
return Encrypt(Text, "litianping");
}
/// <summary>
/// 加密数据
/// </summary>
/// <param name="Text"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public static string Encrypt(string Text,string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray;
inputByteArray=Encoding.Default.GetBytes(Text);
des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
System.IO.MemoryStream ms=new System.IO.MemoryStream();
CryptoStream cs=new CryptoStream(ms,des.CreateEncryptor(),CryptoStreamMode.Write);
cs.Write(inputByteArray,0,inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret=new StringBuilder();
foreach( byte b in ms.ToArray())
{
ret.AppendFormat("{0:X2}",b);
}
return ret.ToString();
}
#endregion
#region ========解密========
/// <summary>
/// 解密
/// </summary>
/// <param name="Text"></param>
/// <returns></returns>
public static string Decrypt(string Text)
{
return Decrypt(Text, "litianping");
}
/// <summary>
/// 解密数据
/// </summary>
/// <param name="Text"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public static string Decrypt(string Text,string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
int len;
len=Text.Length/2;
byte[] inputByteArray = new byte[len];
int x,i;
for(x=0;x<len;x++)
{
i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
inputByteArray[x]=(byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
System.IO.MemoryStream ms=new System.IO.MemoryStream();
CryptoStream cs=new CryptoStream(ms,des.CreateDecryptor(),CryptoStreamMode.Write);
cs.Write(inputByteArray,0,inputByteArray.Length);
cs.FlushFinalBlock();
return Encoding.Default.GetString(ms.ToArray());
}
#endregion
}