//数据库
public class GF_DA { /// <summary> /// 执行SQL语句 sConnStr 连接字符串,sql执行的sql命令 返回第一行第一列 /// </summary> /// <param name="sConnStr"></param> /// <param name="sql"></param> /// <returns></returns> public static object ExecSQL(string sConnStr, string sql) { using (SqlConnection conn = new SqlConnection(sConnStr)) { using (SqlCommand cmd = new SqlCommand()) { try { conn.Open(); cmd.Connection = conn; cmd.CommandText = sql; return cmd.ExecuteScalar(); } catch { return null; } } } } /// <summary> /// 执行SQL数组 /// </summary> /// <param name="sConnStr"></param> /// <param name="alSql"></param> /// <param name="iLen"></param> public static void ExecSQL(string sConnStr, ArrayList alSql, int iLen) { using (SqlConnection conn = new SqlConnection(sConnStr)) { using (SqlCommand cmd = new SqlCommand()) { try { conn.Open(); cmd.Connection = conn; for (int i = 0; i < alSql.Count; i++) { cmd.CommandText = alSql[i].ToString(); cmd.ExecuteNonQuery(); } } catch { } } } } /// <summary> /// 填充数据 返回DataTable /// </summary> /// <param name="sConnStr"></param> /// <param name="sql"></param> /// <param name="sTableName"></param> /// <returns></returns> public static DataTable DataFill(string sConnStr, string sql, string sTableName) { using (SqlConnection conn = new SqlConnection(sConnStr)) { using (SqlCommand cmd = new SqlCommand()) { DataSet ds = new DataSet(); try { conn.Open(); cmd.Connection = conn; cmd.CommandText = sql; SqlDataAdapter ap = new SqlDataAdapter(cmd); ap.Fill(ds, sTableName); return ds.Tables[0]; } catch { return null; } } } } }/// <summary>
/// 加密 /// </summary> public class DES { //默认密钥向量 private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; }