时间:2021-07-01 10:21:17 帮助过:1人阅读
        public int Insert<T>(T m) where T : class
        {
              PropertyInfo[] pInfos = m.GetType().GetProperties();
              FieldInfo[] fInfos = m.GetType().GetFields();
              List<string> lstCol = new List<string>();
              List<OleDbParameter> lstParam = new List<OleDbParameter>();
              for (int i = 0; i < pInfos.GetLength(0); i++)
              {
                    PropertyInfo pInfo = pInfos[i];
                    object value = pInfo.GetValue(m, null);
                    string name = pInfo.Name;
                    string DeclarType = pInfo.PropertyType.Name;
                    if (DeclarType.ToUpper().Contains("DateTime".ToUpper()))
                    {
                          value = ((DateTime)value).ToString("yyyy-MM-dd HH:mm:ss.fff");
                    }
                    lstCol.Add(name);
                    lstParam.Add(new OleDbParameter("@" + name, value));
              }
              string Keys = " " + string.Join(",", lstCol.ToArray());
              string Values = " " + "@" + string.Join(",@", lstCol.ToArray());
              string sql;
              sql = @"Insert into " + GetTableName() + "("
                  + Keys
                  + ")values("
                  + Values
                  + ")";
              string ErrorMsg;
              return DBAHelp.DBA_ExecuteNonQuery(sql, (OleDbParameter[])(lstParam.ToArray()), out ErrorMsg);
}
        public int Update<T>(T m, string UpdateKey) where T : class
        {
              string FullName = m.GetType().FullName;
              T mNew = Activator.CreateInstance(m.GetType()) as T;
              PropertyInfo[] pInfos = m.GetType().GetProperties();
              PropertyInfo[] pInfosNew = mNew.GetType().GetProperties();
              List<string> lstCol = new List<string>();
              List<OleDbParameter> lstParam = new List<OleDbParameter>();
              OleDbParameter KeyParam = null;
              string sKey = "";
              for (int i = 0; i < pInfos.GetLength(0); i++)
              {
                    PropertyInfo pInfo = pInfos[i];
                    object value = pInfo.GetValue(m, null);
                    string name = pInfo.Name;
                    PropertyInfo pInfoNew = pInfosNew[i];
                    object valueNew = pInfoNew.GetValue(mNew, null);
                    if (UpdateKey.ToUpper() == name.ToUpper())
                    {
                          KeyParam = new OleDbParameter("@" + name, value);
                          sKey = name + "=@" + name;
                    }
                    else if (!value.Equals(valueNew))
                    {
                          string Line = name + "=@" + name;
                          lstCol.Add(Line);
                          lstParam.Add(new OleDbParameter("@" + name, value));
                    }
              }
              string Lines = string.Join(",", lstCol.ToArray());
              if (KeyParam != null)
              {
                    lstParam.Add(KeyParam);
              }
              string sql;
              sql = @"Update " + GetTableName() + " Set "
                  + Lines
                  + " Where "
                  + sKey
                  + "";
              string ErrorMsg;
              return DBAHelp.DBA_ExecuteNonQuery(sql, (OleDbParameter[])(lstParam.ToArray()), out ErrorMsg);
        }
利用反射插入数据库与更新数据库
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