/// <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)
{
SqlTrans _trans = new SqlTrans(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>
/// createDB: 创建数据库
/// </summary>
/// <param name="_DBName">数据库名</param>
/// <returns></returns>
public string createDB(string _DBName, string _DataPath)
{
string _val = String.Empty, _copyTableSQLs = String.Empty;
SqlTrans _trans = new SqlTrans(this);
string _sql = @"use master;
if exists (select * from sysdatabases where name='{0}') drop database {0};
EXEC sp_configure 'show advanced options', 1; RECONFIGURE;
EXEC sp_configure 'xp_cmdshell', 1; RECONFIGURE;
exec xp_cmdshell 'mkdir {1}', NO_OUTPUT;
create database {0}
on primary (name='{0}_data',fileName='{1}\\{0}_data.mdf',size=10MB,filegrowth=10%)
log on (name='{0}_log',fileName='{1}\\{0}_data.ldf',size=1MB,maxsize=20MB,filegrowth=10%)";
helper.execNonQuery(_sql, _DBName, _DataPath);
string[] _tables = execQuery("Select name FROM {0}..SysObjects Where XType='U' and charindex('SYS_',name)<>1 ORDER BY Name;", DB_TEMPLATE).Split(getRSplit().ToCharArray());
for (int i = 0, _len = _tables.GetLength(0); i < _len; i++)
{
_copyTableSQLs += MString.format("select * into {0}.dbo.{2} from {1}.dbo.{2};", _DBName, DB_TEMPLATE, _tables[i]);
}
try
{
_trans.execNonQuery(_copyTableSQLs);
_trans.commit();
}
catch (Exception e)
{
_val = e.Message;
_trans.rollback();
}
finally
{
_trans.close();
}
return(_val);
}
/*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)
{
SqlTrans _trans = new SqlTrans(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>
/// 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)
{
SqlTrans _trans = new SqlTrans(this);
string _val = String.Empty, _sign = ">", _fn = "min";
if (_ifAsc)
{
_sign = "<"; _fn = "max";
}
try
{
Json _node = _trans.execJson(MString.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 = MString.format(_sql, _table, _target.getValue("treeOrder"), _id);
_sql += "update {0} set treeOrder={1} where id={2};";
_sql = MString.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)
{
SqlTrans _trans = new SqlTrans(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();
}
}
/// <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)
{
SqlTrans _trans = new SqlTrans(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);
}
/// <summary>
/// deleteDB: 删除数据库
/// </summary>
/// <param name="_DBName">数据库名</param>
public void deleteDB(string _DBName)
{
SqlTrans _trans = new SqlTrans(this);
string _val = String.Empty;
try
{
string _sql = "use master;drop database {0};";
_trans.execNonQuery(_sql, _DBName);
_trans.commit();
}
catch (Exception e)
{
_val = e.Message;
_trans.rollback();
}
finally
{
_trans.close();
}
}
/// <summary>
/// getSqlTrans: 得到SqlTrans对象
/// </summary>
/// <returns>SqlTrans对象</returns>
public static SqlTrans getSqlTrans()
{
SqlTrans _trans = null;
if (helper == null)
{
helper = new MsSqlDBHelper();
}
if (api == null)
{
api = new BaseApi(helper);
}
if (transAry.Count < 5)
{
_trans = new SqlTrans(api);
transAry.Add(_trans);
}
else
{
for (int i = 0; i < transAry.Count; i++)
{
_trans = (SqlTrans)transAry[i];
if (_trans == null)
{
transAry.Remove(i); continue;
}
if (_trans.state != ConnectionState.Closed)
{
break;
}
}
if (_trans == null)
{
_trans = new SqlTrans(api);
transAry.Add(_trans);
}
}
return(_trans);
}
/**
* 对数据库的基本通用操作函数有一下方法:
* getAllTable: 得到连接数据库的所有表
* getTableFields: 得到连接数据库的所有表
* getAllProcs: 得到数据库的所有存储过程
* tableExist: 判断数据库是否存在表名是tableName的表
* execSql: 通用执行sql语句的存储过程
* getTableInfo: 获取某张表的字段信息
* select: 查询
* insert: 插入
* delete: 删除
* update: 修改
**/
#region addColumn: 添加列
/// <summary>
/// addColumn: 添加列
/// </summary>
/// <param name="table">字符串要写到的文件路径</param>
/// <param name="colName">要写的文件内容</param>
/// <param name="colType">字符串要写到的文件路径</param>
/// <param name="colIdx">要写的文件内容</param>
/// <returns>返回是否成功</returns>
public string addColumn(string table, string colName, string colType, int colid)
{
SqlTrans _trans = new SqlTrans(this);
string _result = String.Empty;
try{
_result = _trans.execReader("select 1 from sysobjects where name='{0}' and xtype='u';", table);
if (Native.isNullEmpty(_result))
{
_result = Native.getErrorMsg("表({0})还未创建哦", table);
}
else
{
_result = _trans.execReader("select 1 from syscolumns where id=object_id('{0}') and name='{1}';", table, colName);
if (!Native.isNullEmpty(_result))
{
_result = Native.getErrorMsg("表({0})已经有这个列({1})了哦", table, colName);
}
else
{
string _colid = _trans.execScalar(@"
declare @colid_max int, @colid int;
select @colid_max=max(colid) from syscolumns where id=object_id('{0}');
if {1}>@colid_max or {1}<1
set @colid={1}+1
else
set @colid={1}
select @colid as 'colid';
", table, colid);
_trans.execNonQuery("alter table {0} add {1} {2};", table, colName, colType);
string _colid_max = _trans.execScalar(@"select colid from syscolumns where id=object_id('{0}') and name = '{1}';", table, colName);
if (_trans.execScalar("select @@rowcount;") != "1")
{
_result = Native.getErrorMsg("加一个新列不成功，请检查你的列类型是否正确");
}
else
{
_result = execQuery(@"
declare @sql varchar(1000);
exec sp_configure 'allow updates', 0;
exec sp_configure 'allow updates', 1;
exec sp_configure 'show advanced options', 1;
RECONFIGURE WITH OVERRIDE;
set @sql = 'update syscolumns set colid=-1 where id=object_id(''{0}'') and colid='+cast({1} as varchar(10));
exec(@sql);
set @sql = 'update syscolumns set colid=colid+1 where id=object_id(''{0}'') and colid>='+cast({2} as varchar(10));
exec(@sql);
set @sql = 'update syscolumns set colid='+cast({2} as varchar(10))+' where id=object_id(''{0}'') and name=''{3}'';';
exec(@sql);", table, _colid_max, _colid, colName);
}
}
}
_trans.commit();
}catch (Exception e) {
_trans.rollback();
_result = Native.getErrorMsg(e.Message.ToString());
}finally{
_trans.close();
}
return(_result);
}
