public static string GetEntityMappingTableName(Type entityType)
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(entityType);
string tableName = entityInfo.MappingTableAttribute.TableName;
return(tableName);
}
/// <summary>
/// 将数据库中的行数据转换成一个实体对象
/// </summary>
/// <typeparam name="T">指定类型</typeparam>
/// <param name="dataRow">数据库中的行数据</param>
/// <returns>指定类型的实体对象</returns>
public static T ConvertDataRowToEntity <T>(DataRow dataRow) where T : new()
{
//断言传入的datarow不能为null
PreconditionAssert.IsNotNull(dataRow, ErrorMessages.NullReferenceException);
T tempT = new T();
Type entityType = typeof(T);
string fieldName;
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(entityType);
foreach (SchemaItem mfi in entityInfo.GetAllFieldInfos())
{
fieldName = mfi.MappingFieldAttribute.FieldName;
if (string.IsNullOrEmpty(fieldName))
{
continue;
}
if (dataRow.Table.Columns.Contains(fieldName))
{
if (dataRow[fieldName].Equals(DBNull.Value))
{
mfi.ProInfo.SetValue(tempT, null, null);
}
else
{
Type type = Nullable.GetUnderlyingType(mfi.ProInfo.PropertyType) ?? mfi.ProInfo.PropertyType;
mfi.ProInfo.SetValue(tempT, dataRow[fieldName], null);
}
}
}
return(tempT);
}
private DbCommand GetAllCountDbCommand(Type entityType)
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(entityType);
List <PropertyInfo> fieldPropertyList = new List <PropertyInfo>();
string sqlSelect = string.Format("SELECT COUNT(*) FROM {0}", this.GetQuotedName(entityInfo.MappingTableAttribute.TableName));
DbCommand dbCommand = GetDbCommandByEntity(fieldPropertyList, null);
dbCommand.CommandText = sqlSelect;
return(dbCommand);
}
private DbCommand GetDbCommand(object entity)
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(entity.GetType());
List <PropertyInfo> fieldPropertyList = null;
string tableName = entityInfo.MappingTableAttribute.TableName;
string sqlSelect = string.Format("SELECT {0}", GetSelectStatement(entityInfo, out fieldPropertyList, null));
DbCommand dbCommand = GetDbCommandByEntity(fieldPropertyList, entity);
dbCommand.CommandText = sqlSelect;
return(dbCommand);
}
public static void CheckEntityKey(object entity)
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(entity.GetType());
foreach (SchemaItem mfi in entityInfo.GetKeyFieldInfos())
{
if (mfi.ProInfo.GetValue(entity, null) == null)//如果对象的属性为null，则把此参数设置为DBNull
{
throw new ORMException(ErrorMessages.PrimaryKeyIsNull);
}
}
}
/// <summary>
/// 删除数据库中某一对象的DbCommand，deleteCommandCreator的属性Entity不能为空
/// </summary>
/// <exception cref="RException(DatabaseErrorCode.CommandTextIsEmpty - 0x00010102)">
/// 属性Entity为null时，引发此异常
/// </exception>
/// <returns>删除数据库中某一对象的DbCommand，DbCommand的参数为所传入的Entity的属性</returns>
private DbCommand GetDeleteByEntityDbCommand()
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(EntityType);
List <PropertyInfo> fieldPropertyList = null;
string sqlDelete = string.Format("DELETE FROM {0} {1}"
, GetQuotedName(entityInfo.MappingTableAttribute.TableName)
, GetDeleteStatement(entityInfo, out fieldPropertyList));
DbCommand dbCommand = GetDbCommandByEntity(fieldPropertyList, Entity);
dbCommand.CommandText = sqlDelete;
return(dbCommand);
}
public static string GetEntityInfoMessage(object entity)
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(entity.GetType());
StringBuilder infoBuilder = new StringBuilder();
infoBuilder.AppendLine("Entity Type: " + entity.GetType().FullName);
foreach (SchemaItem mfi in entityInfo.GetKeyFieldInfos())
{
PropertyInfo property = mfi.ProInfo;
infoBuilder.AppendLine("[" + property.Name + "]: " + property.GetValue(entity, null));
}
return(infoBuilder.ToString());
}
public static void EntityIsMappingDatabase(Type type, string message)
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(type);
if (entityInfo.MappingTableAttribute == null)
{
throw new ORMException(message);
}
if (entityInfo.GetKeyFieldInfos() == null || entityInfo.GetKeyFieldInfos().Count == 0)
{
throw new ORMException(message);
}
}
/// <summary>
/// 得到新增数据库中某一对象的DbCommand，modifyCommandCreator的属性Entity不能为空
/// </summary>
/// <exception cref="RException(DatabaseErrorCode.CommandTextIsEmpty - 0x00010102)">
/// 属性Entity为null时，引发此异常
/// </exception>
/// <returns>新增数据库中某一对象的DbCommand，DbCommand的参数为所传入的Entity的属性</returns>
public override DbCommand GetDbCommand()
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(Entity.GetType());
List <PropertyInfo> fieldPropertyList = null;
string sqlInsert = string.Format("INSERT INTO {0} {1}"
, GetQuotedName(entityInfo.MappingTableAttribute.TableName)
, GetInsertStatement(entityInfo, out fieldPropertyList));
DbCommand dbCommand = GetDbCommandByEntity(fieldPropertyList, this.Entity);
dbCommand.CommandText = sqlInsert;
return(dbCommand);
}
private DbCommand GetDbCommand(Type entityType, params SortInfo[] orderBy)
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(entityType);
List <PropertyInfo> fieldPropertyList = new List <PropertyInfo>();
string tableName = entityInfo.MappingTableAttribute.TableName;
string sqlSelect = string.Format("SELECT {0}", GetSelectStatement(entityInfo));
DbCommand dbCommand = GetDbCommandByEntity(fieldPropertyList, null);
sqlSelect = sqlSelect + this.ToOrderByClause(entityType, orderBy);
dbCommand.CommandText = sqlSelect;
return(dbCommand);
}
private DbCommand GetDbCommand(object entity, string[] filedProterties, params SortInfo[] orderBy)
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(entity.GetType());
List <PropertyInfo> fieldPropertyList = null;
string tableName = entityInfo.MappingTableAttribute.TableName;
string sqlSelect = string.Format("SELECT {0}",
GetSelectStatement(entityInfo, out fieldPropertyList, filedProterties));
DbCommand dbCommand = GetDbCommandByEntity(fieldPropertyList, entity);
sqlSelect = sqlSelect + this.ToOrderByClause(entity.GetType(), orderBy);
dbCommand.CommandText = sqlSelect;
return(dbCommand);
}
/// <summary>
/// 得到修改数据库中某一对象的DbCommand，modifyCommandCreator的属性Entity不能为空
/// </summary>
/// <exception cref="RException(DatabaseErrorCode.CommandTextIsEmpty - 0x00010102)">
/// 属性Entity为null时，引发此异常
/// </exception>
/// <returns>修改数据库中某一对象的DbCommand，DbCommand的参数为所传入的Entity的属性</returns>
public override DbCommand GetDbCommand()
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(Entity.GetType());
List <PropertyInfo> fieldPropertyList = null;
string sqlUpdate = string.Format("UPDATE {0} SET {1}"
, GetQuotedName(entityInfo.MappingTableAttribute.TableName)
, GetUpdateStatement(entityInfo, out fieldPropertyList));
DbCommand dbCommand = GetDbCommandByEntity(fieldPropertyList, Entity);
dbCommand.CommandText = sqlUpdate;
return(dbCommand);
}
private DbCommand GetDbCommand(Criteria cri)
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(EntityType);
List <PropertyInfo> fieldPropertyList = new List <PropertyInfo>();
DbCommand dbCommand = GetDbCommandByEntity(fieldPropertyList, null);
List <DbParameter> parameters;
string sqlDelete = string.Format("DELETE FROM {0} WHERE 1=1 {1}"
, GetQuotedName(entityInfo.MappingTableAttribute.TableName)
, cri.GenerateExpression(EntityType, out parameters, DbAccess));
dbCommand.Parameters.AddRange(parameters.ToArray());
dbCommand.CommandText = sqlDelete;
return(dbCommand);
}
private DbCommand GetDbCommand(Criteria criteria, params SortInfo[] orderBy)
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(this.ObjectType);
List <PropertyInfo> fieldPropertyList = new List <PropertyInfo>();
string sqlSelect = string.Format("SELECT {0}", GetSelectStatement(entityInfo));
DbCommand dbCommand = GetDbCommandByEntity(fieldPropertyList, null);
List <DbParameter> parameters;
sqlSelect = sqlSelect + " WHERE 1=1 " + criteria.GenerateExpression(this.ObjectType, out parameters, DbAccess);
sqlSelect = sqlSelect + this.ToOrderByClause(this.ObjectType, orderBy);
dbCommand.Parameters.AddRange(parameters.ToArray());
dbCommand.CommandText = sqlSelect;
return(dbCommand);
}
/// <summary>
/// 构建select count()语句
/// </summary>
/// <returns></returns>
private DbCommand GetCountDbCommand(object entity, string[] filterPerproties)
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(entity.GetType());
List <PropertyInfo> fieldPropertyList = null;
string sqlSelect = "";
if (filterPerproties == null)
{
sqlSelect = string.Format("SELECT COUNT(*) FROM {0}", this.GetQuotedName(entityInfo.MappingTableAttribute.TableName));
fieldPropertyList = new List <PropertyInfo>();//初始化fieldPropertyList，仅仅为了给GetDbCommandByEntity提供无元素的List
}
else
{
sqlSelect = string.Format("SELECT {0}", GetCountSelectStatement(entityInfo, out fieldPropertyList, filterPerproties));
}
DbCommand dbCommand = GetDbCommandByEntity(fieldPropertyList, entity);
dbCommand.CommandText = sqlSelect;
return(dbCommand);
}
internal virtual void Init(Type objectType, IDbAccess dbAccess)
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(objectType);
SchemaItem fieldInfo = entityInfo.GetFieldInfoByPropertyName(this._propertyName);
if (fieldInfo == null)
{
throw new ArgumentException(string.Format("{0} - Property \"{1}\" not define a mapping field.", this.GetType(), _propertyName));
}
Type type = fieldInfo.ProInfo.PropertyType;
type = Nullable.GetUnderlyingType(type) ?? type;
if (type.IsEnum)
{
this._dbType = DbType.Int32;
}
else
{
this._dbType = ORMHelper.GetDbTypeByName(type.Name);
}
this._fieldName = fieldInfo.MappingFieldAttribute.FieldName;
this._dbAccess = dbAccess;
}
private string ToOrderByClause(Type entityType, params SortInfo[] orderBy)
{
TypeSchema entityInfo = ORMSchemaCache.GetTypeSchema(entityType);
string orderByStr = "";
if (null != orderBy && orderBy.Length > 0)
{
foreach (SortInfo tempSortInfo in orderBy)
{
SchemaItem fieldInfo = entityInfo.GetFieldInfoByPropertyName(tempSortInfo.PropertyName);
if (fieldInfo == null)
{
throw new ArgumentException("Sort property not define a mapping field. - \"" + tempSortInfo.PropertyName + "\"");
}
string tempName = GetQuotedName(fieldInfo.MappingFieldAttribute.FieldName);
if (tempSortInfo.Direction == SortDirection.Desc)
{
orderByStr += "," + tempName + " Desc";
}
else
{
orderByStr += "," + tempName;
}
}
if (orderByStr.Length > 0)
{
orderByStr = orderByStr.Substring(1); //remove the first char ','.
}
return(string.Format(" ORDER BY {0}", orderByStr));
}
else
{
return(orderByStr);
}
}
