分页

/**//**//**//// <summary>
        /// 分页
        /// </summary>
        /// <param name="pagesize">每页大小</param>
        /// <param name="pageindex">当前页数</param>
        /// <param name="field">获取字段名</param>
        /// <param name="tablename">表名</param>
        /// <param name="orderfield">排序字段</param>
        /// <param name="taxis">排序方式,true为升序，false为降序</param>
        /// <param name="condition">满足的条件</param>
        /// <returns></returns>
public DataSet GetPage(int pagesize,int pageindex,string field,string tablename,string orderfield,bool taxis,string condition)
{
string temp;
if(taxis)
{
temp="asc";
}
else
{
temp="desc";
}

string sql;
if(pageindex==1)              
{
if(condition=="")
{
sql="select top "+pagesize+" "+field+" from "+tablename+" order by "+orderfield+" "+temp;
return GetData(sql);
}
else
{
sql="select top "+pagesize+" "+field+" from "+tablename+" where "+condition+" order by "+orderfield+" "+temp;
return GetData(sql);
}
}
else
{
pageindex=(pageindex-1)*pagesize;
if(condition=="")
{
if(taxis)
{
sql="select top "+pagesize+" "+field+" from "+tablename+" where "+orderfield+">all(select top "+pageindex+" "+orderfield+" from "+tablename+" order by "+orderfield+" "+temp+") order by "+orderfield+" "+temp;
}
else
{
sql="select top "+pagesize+" "+field+" from "+tablename+" where "+orderfield+"<all(select top "+pageindex+" "+orderfield+" from "+tablename+" order by "+orderfield+" "+temp+") order by "+orderfield+" "+temp;
}
return GetData(sql);
}
else
{
if(taxis)
{
sql="select top "+pagesize+" "+field+" from "+tablename+" where "+condition+" and "+orderfield+">all(select top "+pageindex+" "+orderfield+" from "+tablename+" where "+condition+" order by "+orderfield+" "+temp+") order by "+orderfield+" "+temp;
}
else
{
sql="select top "+pagesize+" "+field+" from "+tablename+" where "+condition+" and "+orderfield+"<all(select top "+pageindex+" "+orderfield+" from "+tablename+" where "+condition+" order by "+orderfield+" "+temp+") order by "+orderfield+" "+temp;
}
return GetData(sql);
}
}

}