using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Configuration; using System.Reflection; namespace WebApplication4{ public partial class _Default : System.Web.UI.Page { protected void Page_Load( object sender, EventArgs e) { abc ta = new abc(); Type type = ta.GetType(); GetTableName(type); PropertyInfo[] propertys = type.GetProperties(BindingFlags.Public | BindingFlags.Instance); FieldInfo[] fields = type.GetFields(BindingFlags.Public | BindingFlags.Instance); foreach (PropertyInfo p in propertys) { //此处用了PropertyInfo.GetCustomAttributes方法，该方法继承至MemberInfo object [] objs = p. GetCustomAttributes( false ); foreach ( object obj in objs) { // string PK = GetPrimaryKey(obj); string ColumnName = GetColumnName(obj); } } } public static string GetTableName(Type classType) { string strTableName = string .Empty; string strEntityName = string .Empty; string strTableTel = string .Empty; strEntityName = classType.FullName; // 类的全名
// 此处用了System.Type.GetCustomAttributes 方法，该方法继承至MemberInfo
object classAttr = classType. GetCustomAttributes( false )[ 0 ]; if (classAttr is TableAttribute) { TableAttribute tableAttr = classAttr as TableAttribute; strTableName = tableAttr.Name; strTableTel = tableAttr.Tel; } if ( string .IsNullOrEmpty(strTableName)) { throw new Exception( " 实体类: " + strEntityName + " 的属性配置[Table(name=\"tablename\")]错误或未配置 " ); } if ( string .IsNullOrEmpty(strTableTel)) { throw new Exception( " 实体类: " + strEntityName + " 的属性配置[Table(tel=\"telname\")]错误或未配置 " ); } return strTableName; } public static string GetPrimaryKey( object attribute) { string strPrimary = string .Empty; IdAttribute attr = attribute as IdAttribute; switch (attr.Strategy) { case GenerationType.INDENTITY: break ; case GenerationType.SEQUENCE: strPrimary = System.Guid.NewGuid().ToString(); break ; case GenerationType.TABLE: break ; } return strPrimary; } public static string GetColumnName( object attribute) { string columnName = string .Empty; if (attribute is ColumnAttribute) { ColumnAttribute columnAttr = attribute as ColumnAttribute; columnName = columnAttr.Name; } else if (attribute is IdAttribute) { IdAttribute idAttr = attribute as IdAttribute; columnName = idAttr.Name; } return columnName; } } [Table(Name = " Student " ,Tel = " ew " )] public class abc { private string _a = string .Empty; [Id(Name = " studentid " , Strategy = GenerationType.INDENTITY)] public string a { get { return _a; } set { _a = value; } } private string _b = string .Empty; [Column(Name = " studentno " )] public string b { get { return _b; } set { _b = value; } } public string c = string .Empty; } [AttributeUsage(AttributeTargets.Class, AllowMultiple = false , Inherited = false )] public class TableAttribute : Attribute { public TableAttribute() { } private string _Name = string .Empty; public string Name { get { return _Name; } set { _Name = value; } } private string _Tel = string .Empty; public string Tel { get { return _Tel; } set { _Tel = value; } } } [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false , Inherited = false )] public class IdAttribute : Attribute { private string _Name = string .Empty; private int _Strategy = GenerationType.INDENTITY; public string Name { get { return _Name; } set { _Name = value; } } public int Strategy { get { return _Strategy; } set { _Strategy = value; } } } public class GenerationType { public const int INDENTITY = 1 ; // 自动增长 public const int SEQUENCE = 2 ; // 序列 public const int TABLE = 3 ; // TABLE private GenerationType() { } // 私有构造函数，不可被实例化对象 } [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false , Inherited = false )] public class ColumnAttribute : Attribute { public ColumnAttribute() { } private string _Name = string .Empty; // 列名 private bool _IsUnique = false ; // 是否唯一 private bool _IsNull = true ; // 是否允许为空 private bool _IsInsert = true ; // 是否插入到表中 private bool _IsUpdate = true ; // 是否修改到表中 public string Name { get { return _Name; } set { _Name = value; } } public bool IsUnique { get { return _IsUnique; } set { _IsUnique = value; } } public bool IsNull { get { return _IsNull; } set { _IsNull = value; } } public bool IsInsert { get { return _IsInsert; } set { _IsInsert = value; } } public bool IsUpdate { get { return _IsUpdate; } set { _IsUpdate = value; } } }}