private void ValidateSave()
{
try
{
if (_dataTable == null)
{
DataObjectException ValidationError = new DataObjectException("The object's data table has not been set.");
throw ValidationError;
}
for (int i = 0; i < PrimaryKeys.Count; i++)
{
if (_dataTable.Columns[PrimaryKeys[i].Name] == null)
{
DataObjectException ValidationError = new DataObjectException("The primary key field does not exist in the datatable.");
throw ValidationError;
}
}
if (_dataRow == null)
{
DataObjectException.NoCurrentRecordException ValidationError = new DataObjectException.NoCurrentRecordException();
throw ValidationError;
}
}
catch (DataObjectException err)
{
throw err;
}
catch (Exception err)
{
throw err;
}
}
/// <summary>
/// Reloads the data for this object from the database.
/// </summary>
public virtual void Refresh()
{
try
{
DataCommand.Connection = this.ConnHandler.RequestConnection(Alias, this);
int GetID = -1;
if (_dataRow == null)
{
// No current record
DataObjectException.NoCurrentRecordException NoRecordError =
new DataObjectException.NoCurrentRecordException();
throw NoRecordError;
}
DataCommand.CommandText = "SELECT * FROM " +
TableName + " WHERE";
for (int i = 0; i < PrimaryKeys.Count; i++)
{
if (i > 0)
{
DataCommand.CommandText += " AND";
}
if (_dataTable.Columns.Count > 0)
{
if (_dataRow[PrimaryKeys[i].Name] is int)
{
GetID = (int)_dataRow[PrimaryKeys[i].Name];
}
else
{
GetID = -1;
}
DataCommand.CommandText += " " + PrimaryKeys[i].Name + " = " + GetID.ToString();
}
else
{
// This command will only return the table's structure, no actual records
DataCommand.CommandText += " " + PrimaryKeys[i].Name + " = -1";
}
}
if ((int)DataAdapter.Fill(_dataTable) > 0)
{
// Existing record
_dataRow = _dataTable.Rows[_dataTable.Rows.Count - 1];
}
else
{
// New record
_dataRow = _dataTable.NewRow();
}
}
catch (Exception err)
{
throw err;
}
finally
{
ConnHandler.ReleaseConnection(this, DataCommand.Connection);
}
}
/// <summary>
/// Deletes this record from the database.
/// </summary>
public virtual void Delete()
{
try
{
// Ensure the object is ready to be deleted
ValidateSave();
string Sql;
if (_dataRow == null)
{
// No current row
DataObjectException.NoCurrentRecordException NoRecordError =
new DataObjectException.NoCurrentRecordException();
throw NoRecordError;
}
if (_dataRow.RowState == DataRowState.Detached)
{
_dataRow = null;
return;
}
else
{
Sql = "DELETE FROM " + TableName + " WHERE";
for (int i = 0; i < PrimaryKeys.Count; i++)
{
if (i > 0)
{
Sql += " AND";
}
if (_dataRow[PrimaryKeys[i].Name].ToString() != String.Empty)
{
Sql += " " + PrimaryKeys[i].Name + " = " + _dataRow[PrimaryKeys[i].Name].ToString();
}
else
{
DataObjectException PrimaryKeyError = new DataObjectException("One or more required fields do not have valid values.");
throw PrimaryKeyError;
}
}
DataCommand.Connection = ConnHandler.RequestConnection(Alias, this);
_dbcmdData.CommandText = Sql;
_dbcmdData.ExecuteNonQuery();
_dataRow = null;
}
if (RecordChanged != null)
{
RecordChangedEventArgs args = new RecordChangedEventArgs(RowAction.Deleted);
RecordChanged(this, args);
}
}
catch (Exception err)
{
throw err;
}
finally
{
ConnHandler.ReleaseConnection(this, DataCommand.Connection);
}
}
