/// <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);
}
public ArrayList execJsonList(string sql, params object[] args)
{
return(execJsonList(MySqlString.format(sql, args)));
}
public Json execJson(string sql, params object[] args)
{
return(execJson(MySqlString.format(sql, args)));
}
public DataSet execDataSet(string sql, params object[] args)
{
return(execDataSet(MySqlString.format(sql, args)));
}
public string execScalar(string sql, Json json)
{
return(execScalar(MySqlString.format(sql, json)));
}
public string execScalar(string sql, params object [] args)
{
return(execScalar(MySqlString.format(sql, args)));
}
public int execNonQuery(string sql, Json json)
{
return(execNonQuery(MySqlString.format(sql, json)));
}
public int execNonQuery(string sql, params object [] args)
{
return(execNonQuery(MySqlString.format(sql, args)));
}
public string execSqlByProc(string sql, Json json)
{
return(execSqlByProc(MySqlString.format(sql, json)));
}
public string execQuery(string sql, Json json)
{
return(execQuery(MySqlString.format(sql, json)));
}
