/// <summary>
/// deleteTreeNode: 删除树节点
/// </summary>
/// <param name="_table">表名</param>
/// <param name="_id">要删除的节点ID</param>
/// <returns>操作结果</returns>
public string deleteTreeNode(string _table, int _id)
{
MySqlTrans _trans = new MySqlTrans(this);
string _val = String.Empty;
try
{
string _pid = _trans.execScalar("select pid from {0} where id={1};", _table, _id);
if (!Native.isEmpty(_pid))
{
string _sql = @"update {0} set delFlag=1 where pid={1} or id={1};update {0} set sons=sons-1 where id={2};";
_val = _trans.execNonQuery(_sql, _table, _id, _pid).ToString();
_trans.commit();
}
else
{
_val = Native.getErrorMsg("在表({0})中id={1}的节点不存在", _table, _id);
}
}
catch (Exception e)
{
_val = Native.getErrorMsg(e.Message);
_trans.rollback();
}
finally
{
_trans.close();
}
return(_val);
}
/// <summary>
/// orderTreeNode: 根据升序或降序尽心修改顺序
/// </summary>
/// <param name="_table">表名</param>
/// <param name="_id">要排序操作的ID值</param>
/// <param name="_ifAsc">是否按照升序方式排序, true: 升序, false: 降序</param>
/// <returns></returns>
public string orderTreeNode(string _table, int _id, bool _ifAsc)
{
MySqlTrans _trans = new MySqlTrans(this);
string _val = String.Empty, _sign = ">", _fn = "min";
if (_ifAsc)
{
_sign = "<"; _fn = "max";
}
try
{
Json _node = _trans.execJson(MySqlString.getSelectStr(_table, "pid, treeOrder", "id=" + _id));
if (_node != null)
{
int _pid = _node.getInt("pid"), _treeOrder = _node.getInt("treeOrder");
Json _target = _trans.execJson("select top 1 id,treeOrder from {0} where pid={1} and treeOrder=(select {2}(treeOrder) from {0} where pid={1} and treeOrder{3}{4});", _table, _pid, _fn, _sign, _treeOrder);
if (_target != null)
{
string _sql = "update {0} set treeOrder={1} where id={2};";
_sql = MySqlString.format(_sql, _table, _target.getValue("treeOrder"), _id);
_sql += "update {0} set treeOrder={1} where id={2};";
_sql = MySqlString.format(_sql, _table, _treeOrder, _target.getValue("id"));
_trans.execNonQuery(_sql);
}
else
{
Native.writeToPage(Native.getErrorMsg("id是{0}的记录指针已经是第一行或最后一行", _id));
}
}
else
{
Native.writeToPage(Native.getErrorMsg("在表({0})中不存在id是{1}的记录", _table, _id));
}
_trans.commit();
}
catch (Exception e)
{
_val = Native.getErrorMsg(e.Message);
_trans.rollback();
}
finally
{
_trans.close();
}
return(_val);
}
/// <summary>
/// moveTreeNode: 移动树节点
/// </summary>
/// <param name="table">表名</param>
/// <param name="id"></param>
public void moveTreeNode(string table, int id)
{
MySqlTrans _trans = new MySqlTrans(this);
string _val = String.Empty;
try
{
_val = _trans.execReader("");
_trans.commit();
}
catch (Exception e)
{
_val = Native.getErrorMsg(e.Message.ToString());
_trans.rollback();
}
finally
{
_trans.close();
}
}
/*树状表结构的基本操作 --begin*/
#region updateTreeOrder: 更新树结构的treeOrder
/// <summary>
/// updateTreeOrder: 更新树结构的treeOrder
/// </summary>
/// <param name="table">表名</param>
/// <param name="condition">where条件 如: id=12</param>
/// <param name="treeOrder">更新之后的treeOrder值</param>
/// <returns></returns>
public string updateTreeOrder(string table, string condition, int treeOrder)
{
MySqlTrans _trans = new MySqlTrans(this);
string _val = String.Empty;
try
{
_val = _trans.execReader("");
_trans.commit();
}
catch (Exception e)
{
_val = Native.getErrorMsg(e.Message.ToString());
_trans.rollback();
}
finally
{
_trans.close();
}
return(_val);
}
/// <summary>
/// addTreeNode: 添加树节点
/// </summary>
/// <param name="_table">表名</param>
/// <param name="_pid">父节点ID</param>
/// <param name="_key">字段列表</param>
/// <param name="_values">值列表</param>
/// <returns>返回当前树节点ID</returns>
public string addTreeNode(string _table, int _pid, string jsonStr)
{
MySqlTrans _trans = new MySqlTrans(this);
string _val = String.Empty;
try
{
string[] _kv = MConvert.toKV(jsonStr);
_val = _trans.addTreeNode(_table, _pid, _kv[0], _kv[1]);
_trans.commit();
}
catch (Exception e)
{
_trans.rollback();
_val = Native.getErrorMsg(e.Message);
}
finally
{
_trans.close();
}
return(_val);
}
