internal bool Read(object[] primaryKeys)
{
if (primaryKeys.Length == 0)
{
throw new CSException("Read() requires parameters");
}
Initialize();
CSStringCollection columnNames = new CSStringCollection();
List <object> keyValues = new List <object>();
if (primaryKeys.Length != _schema.KeyColumns.Count)
{
throw new CSException(GetType().Name + ".Read(..keys..) called with " + primaryKeys.Length + " parameters, but there are " + _schema.KeyColumns.Count + " key fields defined");
}
for (int i = 0; i < primaryKeys.Length; i++)
{
columnNames.Add(_schema.KeyColumns[i].Name);
keyValues.Add(primaryKeys[i]);
}
if (!ReadFields(_schema.ColumnsToRead, columnNames, keyValues))
{
return(false);
}
_dataState = CSObjectDataState.Loaded;
Fire_ObjectRead();
return(true);
}
private void Initialize()
{
if (_schema == null)
{
_schema = CSSchema.Get(GetType());
}
_dataState = CSObjectDataState.New;
_fieldData = new CSFieldValueCollection(this);
}
internal bool Read()
{
bool ok = ReadFields(_schema.ColumnsToRead);
if (ok)
{
_dataState = CSObjectDataState.Loaded;
}
return(ok);
}
internal void FromDataReader(ICSDbReader dataReader, Dictionary <string, string> aliasMap)
{
for (int i = 0; i < dataReader.FieldCount; i++)
{
string aliasName = dataReader.GetName(i);
string fieldName;
if (aliasMap == null)
{
fieldName = aliasName;
}
else if (!aliasMap.TryGetValue(aliasName, out fieldName))
{
continue;
}
CSSchemaColumn schemaColumn = _schema.Columns[fieldName];
if (schemaColumn == null || schemaColumn.Hidden)
{
continue;
}
object columnValue = dataReader[i];
if (columnValue == _schema.DB.NullFieldValue())
{
columnValue = null;
}
if (schemaColumn.MappedField.Trim && columnValue is string)
{
columnValue = ((string)columnValue).Trim();
}
CSFieldValue fieldValue = _fieldData["#" + schemaColumn.Name];
fieldValue.ValueDirect = columnValue;
fieldValue.ValueState = CSFieldValueState.Read;
}
_dataState = CSObjectDataState.Loaded;
}
protected void Deserialize(SerializationInfo info, StreamingContext context)
{
_dataState = (CSObjectDataState)info.GetValue("DataState", typeof(CSObjectDataState));
foreach (CSFieldValue fieldValue in _fieldData)
{
fieldValue.ValueState = (CSFieldValueState)info.GetValue("FieldState_" + fieldValue.SchemaField.Name, typeof(CSFieldValueState));
fieldValue.ValueDirect = info.GetValue("FieldValue_" + fieldValue.SchemaField.Name, typeof(object));
if (fieldValue.SchemaField.Relation != null && (fieldValue.SchemaField.Relation.RelationType == CSSchemaRelationType.OneToMany || fieldValue.SchemaField.Relation.RelationType == CSSchemaRelationType.ManyToMany))
{
if (fieldValue.ValueDirect is CSList)
{
((CSList)fieldValue.ValueDirect).Relation = fieldValue.SchemaField.Relation;
((CSList)fieldValue.ValueDirect).RelationObject = this;
}
}
}
}
protected bool ReadUsingUniqueKey(string uniqueColumnName, object value)
{
Initialize();
Fire_ObjectReading();
CSStringCollection keyList = new CSStringCollection(uniqueColumnName);
List <object> valueList = new List <object>();
valueList.Add(value);
if (ReadFields(_schema.ColumnsToRead, keyList, valueList))
{
_dataState = CSObjectDataState.Loaded;
Fire_ObjectRead();
return(true);
}
return(false);
}
/// <summary>
/// Mark the object for deletion. The object will be deleted next time it is saved
/// </summary>
public void MarkForDelete()
{
_dataState = CSObjectDataState.MarkedForDelete;
}
/// <summary>
/// Physically deletes the object from the database
/// </summary>
/// <returns><c>true</c> if the object was deleted successfully. Otherwise <c>false</c></returns>
public bool Delete()
{
if (_dataState == CSObjectDataState.Deleted || _dataState == CSObjectDataState.New)
{
return(false);
}
bool cancel = false;
Fire_ObjectDeleting(ref cancel);
if (cancel)
{
return(false);
}
StringBuilder whereClause = new StringBuilder();
CSParameterCollection parameters = new CSParameterCollection();
foreach (CSSchemaColumn schemaColumn in _schema.Columns)
{
if (!schemaColumn.IsKey)
{
continue;
}
CSParameter parameter = parameters.Add();
parameter.Value = _fieldData["#" + schemaColumn.Name].ValueDirect;
if (whereClause.Length > 0)
{
whereClause.Append(" and ");
}
whereClause.Append(_schema.DB.QuoteField(schemaColumn.Name) + "=@" + parameter.Name.Substring(1));
}
if (whereClause.Length == 0)
{
throw new CSException("No key fields");
}
using (CSTransaction csTransaction = new CSTransaction(_schema))
{
string deleteSql = _schema.DB.BuildDeleteSQL(_schema.TableName, null, whereClause.ToString());
int numDeleted = _schema.DB.ExecuteNonQuery(deleteSql, parameters);
if (numDeleted == 1)
{
csTransaction.Commit();
}
else
{
return(false);
}
}
_dataState = CSObjectDataState.Deleted;
Fire_ObjectDeleted();
return(true);
}
private bool Create()
{
CSParameterCollection parameters = new CSParameterCollection();
List <string> fieldNames = new List <string>();
List <string> fieldValues = new List <string>();
List <string> sequenceNames = new List <string>();
foreach (CSSchemaColumn schemaColumn in _schema.Columns)
{
CSFieldValue fieldValue = _fieldData["#" + schemaColumn.Name];
if (fieldValue == null)
{
continue;
}
CSSchemaField schemaField = fieldValue.SchemaField;
if (schemaField.ClientGenerated && schemaColumn.IsKey)
{
if (schemaField.FieldType == typeof(Guid))
{
fieldValue.Value = Guid.NewGuid();
}
}
else
{
if (string.IsNullOrEmpty(schemaField.SequenceName) && (!fieldValue.IsDirty || schemaField.ReadOnly || schemaField.NoCreate || schemaColumn.Identity))
{
continue;
}
}
if (schemaField.ServerGenerated && schemaColumn.IsKey)
{
continue;
}
if (!string.IsNullOrEmpty(schemaField.SequenceName))
{
sequenceNames.Add(schemaField.SequenceName);
fieldValues.Add(null);
}
else
{
CSParameter parameter = parameters.Add();
parameter.Value = fieldValue.ValueDirect;
fieldValues.Add("@" + parameter.Name.Substring(1));
sequenceNames.Add(null);
}
fieldNames.Add(schemaColumn.Name);
}
string[] primaryKeys = new string[_schema.KeyColumns.Count];
for (int i = 0; i < _schema.KeyColumns.Count; i++)
{
primaryKeys[i] = _schema.KeyColumns[i].Name;
}
using (ICSDbReader reader = _schema.DB.ExecuteInsert(_schema.TableName, fieldNames.ToArray(), fieldValues.ToArray(), primaryKeys, sequenceNames.ToArray(), (_schema.IdentityColumn != null && _schema.IdentityColumn.MappedField != null) ? _schema.IdentityColumn.Name : null, parameters))
{
if (reader != null && !reader.IsClosed && reader.Read())
{
FromDataReader(reader, null);
}
}
_dataState = CSObjectDataState.Loaded;
return(true);
}
/// <summary>
/// Saves the object to the database
/// </summary>
/// <returns>true if the object was saved successfully, otherwise false</returns>
/// <remarks>
/// The object will be saved together with all child objects which have been changed. If the object was new, it will be created in the database.
/// If required, any default data which has been filled in by the database server can be retrieved after the object is saved. This includes the primary key
/// that has been generated by the database server (for autonumber/identity fields)
/// </remarks>
public bool Save()
{
bool cancelSave = false;
Fire_ObjectSaving(ref cancelSave);
if (cancelSave)
{
return(false);
}
if (_dataState == CSObjectDataState.New)
{
Fire_ObjectCreating(ref cancelSave);
}
else
{
Fire_ObjectUpdating(ref cancelSave);
}
CSObjectDataState oldState = _dataState;
if (cancelSave)
{
return(false);
}
using (CSTransaction csTransaction = new CSTransaction(_schema, CSIsolationLevel.ReadUncommitted))
{
bool saveOk = SaveChildrenBefore();
if (saveOk)
{
if (_dataState == CSObjectDataState.MarkedForDelete)
{
saveOk = Delete();
}
else
{
if (_dataState == CSObjectDataState.New)
{
saveOk = Create();
}
else
{
saveOk = Write();
}
}
}
if (saveOk)
{
saveOk = SaveChildrenAfter();
}
if (saveOk)
{
csTransaction.Commit();
}
else
{
csTransaction.Rollback();
}
if (saveOk)
{
if (oldState == CSObjectDataState.New)
{
Fire_ObjectCreated();
//Reload();
}
else
{
Fire_ObjectUpdated();
}
Fire_ObjectSaved();
}
return(saveOk);
}
}
