/// <summary>
/// 获取单个属性的自定义特性信息
/// </summary>
/// <param name="proInfo"></param>
/// <param name="param"></param>
/// <returns></returns>
private TableColumnAttribute GetCustomAttributeInfo(PropertyInfo proInfo, object param)
{
TableColumnAttribute columnEntity = null;
if (proInfo == null)
{
return(columnEntity);
}
object[] customAttributes = proInfo.GetCustomAttributes(typeof(TableColumnAttribute), true);
if (customAttributes == null)
{
return(columnEntity);
}
if (customAttributes.Length <= 0)
{
return(columnEntity);
}
columnEntity = (TableColumnAttribute)customAttributes[0];
if (columnEntity == null)
{
return(columnEntity);
}
columnEntity.ColumnName = string.IsNullOrEmpty(columnEntity.ColumnName) ? proInfo.Name : columnEntity.ColumnName;
if (param != null)
{
object attrValue = proInfo.GetValue(param, null);
if (attrValue != null)
{
columnEntity.ColumnValue = attrValue;
}
}
return(columnEntity);
}
/// <summary>
/// 获取表主键字段信息
/// </summary>
/// <returns></returns>
public TableColumnAttribute GetPkColumnInfo(Type type)
{
TableColumnAttribute pkColumn = null;
PropertyInfo[] props = type.GetProperties();
if (props == null || props.Length <= 0)
{
return(pkColumn);
}
foreach (PropertyInfo proInfo in props)
{
TableColumnAttribute systemColumn = GetSystemProperInfo(proInfo, null);
TableColumnAttribute selftDefineColumn = GetCustomAttributeInfo(proInfo, null);
if (systemColumn == null || selftDefineColumn == null)
{
return(pkColumn);
}
if (selftDefineColumn.IsPrimaryKey)
{
pkColumn = selftDefineColumn;
break;
}
}
return(pkColumn);
}
/// <summary>
/// 根据参数获取表字段列表
/// </summary>
/// <param name="param">参数对象,例:new {Uid=1,Uname="joyet"}</param>
/// <returns></returns>
public List <TableColumnAttribute> GetColumnInfos(object param)
{
List <TableColumnAttribute> columnEntityList = null;
if (param == null)
{
return(columnEntityList);
}
Type type = param.GetType();
PropertyInfo[] props = type.GetProperties();
if (props == null)
{
return(columnEntityList);
}
if (props.Length == 0)
{
return(columnEntityList);
}
columnEntityList = new List <TableColumnAttribute>();
foreach (PropertyInfo proInfo in props)
{
TableColumnAttribute systemColumn = GetProperInfo(proInfo, param);
columnEntityList.Add(systemColumn);
}
return(columnEntityList);
}
/// <summary>
/// 根据实体类型、实体对象实例获取表字段列表信息
/// </summary>
/// <param name="type"></param>
/// <param name="entity"></param>
/// <returns></returns>
public List <TableColumnAttribute> GetColumnInfos(Type type, object entity)
{
List <TableColumnAttribute> columnEntityList = null;
PropertyInfo[] propertys = type.GetProperties();
if (propertys == null)
{
return(columnEntityList);
}
if (propertys.Length <= 0)
{
return(columnEntityList);
}
columnEntityList = new List <TableColumnAttribute>();
foreach (PropertyInfo proInfo in propertys)
{
TableColumnAttribute systemColumn = GetProperInfo(proInfo, entity);
TableColumnAttribute selftDefineColumn = GetCustomAttributeInfo(proInfo, entity);
if (selftDefineColumn == null)
{
columnEntityList.Add(systemColumn);
continue;
}
columnEntityList.Add(selftDefineColumn);
}
return(columnEntityList);
}
/// <summary>
///根据主键查询实体对应数据
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="id"></param>
/// <returns></returns>
public virtual DbEntity Query <T>(object id)
{
DbEntity dbEntity = null;
Type type = typeof(T);
var attributeBuilder = new AttributeBuilder();
var tableEntity = attributeBuilder.GetTableInfo(type);
TableColumnAttribute pkColumn = attributeBuilder.GetPkColumnInfo(type);
if (pkColumn == null)
{
return(dbEntity);
}
pkColumn.ColumnValue = id;
string dbOperator = DbFactory.GetDbParamOperator();
List <IDbDataParameter> dbParams = new List <IDbDataParameter>();
StringBuilder sqlBuild = new StringBuilder("select * from {tableName} where {pkColumn}={dbOperator}{pkColumn}");
sqlBuild.Replace("{tableName}", tableEntity.TableName);
sqlBuild.Replace("{pkColumn}", pkColumn.ColumnName);
sqlBuild.Replace("{dbOperator}", dbOperator);
dbParams.Add(DbFactory.GetDbParam(pkColumn));
dbEntity = new DbEntity()
{
TableEntity = tableEntity,
CommandText = sqlBuild.ToString(),
DbParams = dbParams,
};
return(dbEntity);
}
/// <summary>
/// 创建数据库参数对象
/// </summary>
/// <param name="tableColumn"></param>
/// <returns></returns>
public virtual IDbDataParameter GetDbParam(TableColumnAttribute tableColumn)
{
IDbDataParameter dbParam = null;
if (tableColumn == null)
{
return(dbParam);
}
dbParam = GetDbParam(tableColumn.ColumnName, tableColumn.ColumnValue, tableColumn.DataType, tableColumn.MaxLength);
return(dbParam);
}
/// <summary>
/// 获取系统单个属性信息
/// </summary>
/// <param name="proInfo"></param>
/// <param name="entity"></param>
/// <returns></returns>
private TableColumnAttribute GetSystemProperInfo(PropertyInfo proInfo, object entity)
{
TableColumnAttribute column = null;
if (proInfo == null)
{
return(column);
}
column = new TableColumnAttribute();
column.ColumnName = proInfo.Name;
if (entity != null)
{
object attrValue = proInfo.GetValue(entity, null);
if (attrValue != null)
{
column.ColumnValue = attrValue;
}
}
return(column);
}
/// <summary>
///根据主键值查询数据
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="id"></param>
/// <returns></returns>
public virtual DbEntity Query <T>(object id)
{
DbEntity dbEntity = null;
Type type = typeof(T);
var attributeBuilder = new AttributeBuilder();
var tableEntity = attributeBuilder.GetTableInfo(type);
TableColumnAttribute pkColumn = attributeBuilder.GetPkColumnInfo(type);
if (pkColumn == null)
{
return(dbEntity);
}
pkColumn.ColumnValue = id;
string dbOperator = DbFactory.GetDbParamOperator();
List <IDbDataParameter> dbParams = new List <IDbDataParameter>();
StringBuilder sqlBuilder = new StringBuilder("select * from {tableName} {whereCriteria}");
sqlBuilder.Replace("{tableName}", tableEntity.TableName);
//处理过滤字段参数
var whereItem = HandleWhereParam("", new List <TableColumnAttribute>()
{
pkColumn
}, sqlBuilder, dbParams);
sqlBuilder = whereItem.Item1;
dbParams = whereItem.Item2;
dbEntity = new DbEntity()
{
TableEntity = tableEntity,
CommandText = sqlBuilder.ToString(),
DbParams = dbParams,
};
return(dbEntity);
}
/// <summary>
/// 根据实体类型、实体对象实例获取表字段列表
/// </summary>
/// <param name="type"></param>
/// <param name="entity"></param>
/// <returns></returns>
public List <TableColumnAttribute> GetColumnInfos(Type type, object entity)
{
var columnList = new List <TableColumnAttribute>();
PropertyInfo[] propertys = type.GetProperties();
if (propertys == null || propertys.Length <= 0)
{
return(columnList);
}
foreach (PropertyInfo proInfo in propertys)
{
TableColumnAttribute systemColumn = GetSystemProperInfo(proInfo, entity);
TableColumnAttribute selftDefineColumn = GetCustomAttributeInfo(proInfo, entity);
if (selftDefineColumn != null)
{
columnList.Add(selftDefineColumn);
}
else
{
columnList.Add(systemColumn);
}
}
return(columnList);
}
