C# Attribute

 

  1Entity:
  2 [DataTable("BI_USER")]
  3    public class Entity 
  4    {
  5        String _USER_ID;
  6        String _USER_NAME;
  7        String _SHIFT_ID;
  8        String _DEPARTMENT_ID;
  9        String _USER_REMARK;
 10        DateTime _CREATE_TIME;
 11        String _CREATE_USER;
 12        Decimal _USER_STATE;
 13        String _USER_PWD;
 14
 15        [DataField("USER_ID")]
 16        public String USER_ID
 17        {
 18            get { return this._USER_ID; }
 19            set { this._USER_ID = value; }
 20        }
 21        [DataField("USER_NAME")]
 22        public String USER_NAME
 23        {
 24            get { return this._USER_NAME; }
 25            set { this._USER_NAME = value; }
 26        }
 27        [DataField("SHIFT_ID")]
 28        public String SHIFT_ID
 29        {
 30            get { return this._SHIFT_ID; }
 31            set { this._SHIFT_ID = value; }
 32        }
 33        [DataField("DEPARTMENT_ID")]
 34        public String DEPARTMENT_ID
 35        {
 36            get { return this._DEPARTMENT_ID; }
 37            set { this._DEPARTMENT_ID = value; }
 38        }
 39        [DataField("USER_REMARK")]
 40        public String USER_REMARK
 41        {
 42            get { return this._USER_REMARK; }
 43            set { this._USER_REMARK = value; }
 44        }
 45        [DataField("CREATE_TIME")]
 46        public DateTime CREATE_TIME
 47        {
 48            get { return this._CREATE_TIME; }
 49            set { this._CREATE_TIME = value; }
 50        }
 51        [DataField("CREATE_USER")]
 52        public String CREATE_USER
 53        {
 54            get { return this._CREATE_USER; }
 55            set { this._CREATE_USER = value; }
 56        }
 57        [DataField("USER_STATE")]
 58        public Decimal USER_STATE
 59        {
 60            get { return this._USER_STATE; }
 61            set { this._USER_STATE = value; }
 62        }
 63        [DataField("USER_PWD")]
 64        public String USER_PWD
 65        {
 66            get { return this._USER_PWD; }
 67            set { this._USER_PWD = value; }
 68        }
 69    }
 70
 71DataTableAttribute:
 72 [AttributeUsage(AttributeTargets.Struct | AttributeTargets.Class)]
 73    public class DataTableAttribute : Attribute
 74    {
 75        // Fields
 76        private string tableName;
 77
 78        // Methods
 79        public DataTableAttribute(string tableName)
 80        {
 81            this.tableName = tableName;
 82        }
 83
 84        // Properties
 85        public string TableName
 86        {
 87            get
 88            {
 89                return this.tableName;
 90            }
 91            set
 92            {
 93                this.tableName = value;
 94            }
 95        }
 96    }
 97
 98BaseFieldAttribute:
 99 [AttributeUsage(AttributeTargets.Property)]
    public abstract class BaseFieldAttribute : Attribute
    {
        // Fields
        private string columnName;
        private int length;
        private string tableName;

        // Methods
        public BaseFieldAttribute(string columnName)
            : this(columnName, 0)
        {

        }

        public BaseFieldAttribute(string columnName, int length)
        {
            this.columnName = columnName;
            this.length = length;
        }

        // Properties
        public int ColumnLength
        {
            get
            {
                return this.length;
            }
            set
            {
                this.length = value;
            }
        }

        public string ColumnName
        {
            get
            {
                return this.columnName;
            }
            set
            {
                this.columnName = value;
            }
        }

        public string TableName
        {
            get
            {
                return this.tableName;
            }
            set
            {
                this.tableName = value;
            }
        }
    }

DataFieldAttribute:
   [AttributeUsage(AttributeTargets.Property)]
    public class DataFieldAttribute : BaseFieldAttribute
    {
        // Fields
        private DbType dbType;
        private CallbackHandler handler;

        // Methods
        public DataFieldAttribute(string columnName)
            : base(columnName)
        {
            this.handler = CallbackHandler.None;
            this.dbType = DbType.String;
        }

        public DataFieldAttribute(string columnName, CallbackHandler callbackHandler)
            : base(columnName)
        {
            this.handler = CallbackHandler.None;
            this.dbType = DbType.String;
            this.handler = callbackHandler;
        }

        public DataFieldAttribute(string columnName, int length)
            : base(columnName, length)
        {
            this.handler = CallbackHandler.None;
            this.dbType = DbType.String;
        }

        // Properties
        public CallbackHandler CallbackHandler
        {
            get
            {
                return this.handler;
            }
        }

        public DbType Type
        {
            get
            {
                return this.dbType;
            }
            set
            {
                this.dbType = value;
            }
        }
    }

ColumnInfo:
   public enum CallbackHandler
    {
        BlobArray = 0,
        ClobString = 1,
        None = -1
    }

    public class ColumnInfo
    {
        // Fields
        private string alias;
        private Type columnType;
        private object columnValue = DBNull.Value;
        private CallbackHandler handler;
        private int length;
        private string name;
        private string propertyName;

        // Methods
        public ColumnInfo(string name, string alias, Type type, string propertyName)
        {
            this.ColumnName = name;
            this.Alias = alias;
            this.ColumnType = type;
            this.PropertyName = propertyName;
        }

        // Properties
        public string Alias
        {
            get
            {
                return this.alias;
            }
            set
            {
                this.alias = value;
            }
        }

        public CallbackHandler CallbackHandler
        {
            get
            {
                return this.handler;
            }
            set
            {
                this.handler = value;
            }
        }

        public int ColumnLength
        {
            get
            {
                return this.length;
            }
            set
            {
                this.length = value;
            }
        }

        public string ColumnName
        {
            get
            {
                return this.name;
            }
            set
            {
                this.name = value;
            }
        }

        public Type ColumnType
        {
            get
            {
                return this.columnType;
            }
            set
            {
                this.columnType = value;
            }
        }

        public string PropertyName
        {
            get
            {
                return this.propertyName;
            }
            set
            {
                this.propertyName = value;
            }
        }

        public object Value
        {
            get
            {
                return this.columnValue;
            }
            set
            {
                this.columnValue = value;
            }
        }
    }

EntityOperator:
    public class EntityOperator
    {
        private string resultTableName;
   //     private ArrayList callbackColumns;
        private ArrayList columns;

        public void InsertSqlBuild(object o)
        {
            RetrieveProperties(o.GetType());
            BuildInsertSql(o);
        }

        private void RetrieveProperties(Type objectType)
        {
            PropertyInfo[] properties;
            int num;
            BaseFieldAttribute[] attributeArray3;
            this.columns = new ArrayList();
            DataTableAttribute[] customAttributes = (DataTableAttribute[])objectType.GetCustomAttributes(typeof(DataTableAttribute), true);
            if (customAttributes.Length > 0)
            {
                this.resultTableName = customAttributes[0].TableName;
                properties = objectType.GetProperties(BindingFlags.Public | BindingFlags.Instance);
                for (num = 0; num < properties.Length; num++)
                {
                    attributeArray3 = (BaseFieldAttribute[])properties[num].GetCustomAttributes(typeof(BaseFieldAttribute), true);
                    if (attributeArray3.Length > 0)
                    {
                        ColumnInfo info = new ColumnInfo(attributeArray3[0].ColumnName, attributeArray3[0].TableName, properties[num].PropertyType, properties[num].Name);
                        //if (attributeArray3[0] is DataFieldAttribute)
                        //{
                        //    info.CallbackHandler = ((DataFieldAttribute)attributeArray3[0]).CallbackHandler;
                        //    if (info.CallbackHandler != CallbackHandler.None)
                        //    {
                        //        this.callbackColumns.Add(info);
                        //    }
                        //}
                        this.Columns.Add(info);
                    }
                }
            }
        }

        public string BuildInsertSql(object o)
        {
            StringBuilder builder = new StringBuilder();
            StringBuilder builder2 = new StringBuilder(" VALUES ");
            object[] args = new object[] { "INSERT ", " INTO ", this.DataSource, " ", "(" };
            builder.AppendFormat("{0}{1}{2}{3}{4}", args);
            builder2.Append("(");
            int num = 0;
            object parameterValue = null;
            foreach (ColumnInfo info2 in Columns)
            {
                    if (num > 0)
                    {
                        builder.Append(",");
                        builder2.Append(",");
                    }
                    builder.Append(info2.ColumnName);


                    if (info2.ColumnType.FullName == "System.String")
                    {
                        builder2.Append("'");
                        parameterValue = o.GetType().GetProperty(info2.ColumnName).GetValue(o, null);
                        builder2.Append(parameterValue);
                        builder2.Append("'");
                    }
                    else
                    {
                        parameterValue = o.GetType().GetProperty(info2.ColumnName).GetValue(o, null);
                        builder2.Append(parameterValue);
                    }

                    num++;
            }
            builder2.Append(")");
            builder.AppendFormat("{0}{1}", ")", builder2.ToString());
            return builder.ToString();
        }

        // Properties
        //public ArrayList CallbackColumns
        //{
        //    get
        //    {
        //        return this.callbackColumns;
        //    }
        //}

        public ArrayList Columns
        {
            get
            {
                return this.columns;
            }
            set
            {
                this.columns = value;
            }
        }

        public string DataSource
        {
            get
            {
                return this.resultTableName;
            }
        }

    }