/// <summary>
/// 返回分页条数sql
/// </summary>
/// <returns></returns>
public static int ToPageCountSql(DbParameter[] param, DbCommand cmd, string sql, ConfigModel config, ref string tempSql, FilterType type, string tableName)
{
try
{
var table = new List <string>();
if (tableName != null)
{
table.Add(tableName);
}
sql = string.Format("select count(0) from ({0})t", sql);
if (param != null)
{
cmd.Parameters.AddRange(param.ToArray());
}
if (tableName != null)
{
BaseFilter.Filter(param, type, table, config, ref sql);
}
tempSql = ParameterToSql.ObjectParamToSql(param?.ToList(), sql, config);
var dt = BaseExecute.ToDataTable(cmd, sql.ToString());
return(int.Parse(dt.Rows[0][0].ToString()));
}
catch (Exception ex)
{
if (string.Compare(config.SqlErrorType, SqlErrorType.Db, true) == 0)
{
DbLogTable.LogException(config, ex, "ToPageCountSql", "");
}
else
{
DbLog.LogException(config.IsOutError, config.DbType, ex, "ToPageCountSql", "");
}
return(0);
}
}
/// <summary>
/// 返回分页DataReader
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="dbType"></param>
/// <param name="cmd"></param>
/// <param name="pModel"></param>
/// <param name="where"></param>
/// <returns></returns>
public static DbDataReader ToPageDataReader(DataQuery item, DbCommand cmd, PageModel pModel, ref string sql, FilterType type)
{
try
{
var table = new StringBuilder();
var sb = new StringBuilder();
var param = new List <DbParameter>();
table.Append(item.Table[0]);
for (var i = 1; i < item.Predicate.Count; i++)
{
table.AppendFormat(" {0} on {1}", item.Table[i], item.Predicate[i].Where);
if (item.Predicate[i].Param.Count != 0)
{
param.AddRange(item.Predicate[i].Param);
}
}
if (item.Predicate[0].Param.Count != 0)
{
param.AddRange(item.Predicate[0].Param);
}
if (item.Config.DbType == DataDbType.SqlServer)
{
#region sqlserver
var orderByLenght = item.Predicate[0].Where.IndexOf("order by");
sb.AppendFormat(@"select top {0} * from (select row_number()over({5})temprownumber,*
from (select tempcolumn=0,{3} from {1} where {4})t)tt where temprownumber>={2}"
, pModel.PageSize
, table
, pModel.StarId - 1
, string.Join(",", item.Field)
, orderByLenght == -1 ? item.Predicate[0].Where : item.Predicate[0].Where.Substring(0, orderByLenght)
, orderByLenght == -1 ? "order by tempcolumn" : item.Predicate[0].Where.Substring(orderByLenght, item.Predicate[0].Where.Length - orderByLenght));
#endregion
}
else if (item.Config.DbType == DataDbType.Oracle)
{
#region oracle
sb = new StringBuilder();
if (item.Predicate.Count > 0)
{
sb.AppendFormat("select * from(select field.*,ROWNUM RN from(select {0} from {1} where {2}) field where rownum<={3}) where rn>={4}"
, string.Join(",", item.Field)
, table
, item.Predicate[0].Where
, pModel.EndId
, pModel.StarId);
}
else
{
sb.AppendFormat(@"select * from {3}
where rowid in(select rid from
(select rownum rn,rid from
(select rowid rid from {3})
where rownum<={0}) where rn>{1}) and {4}"
, pModel.EndId
, (pModel.StarId - 1)
, string.Join(",", item.Field)
, table
, item.Predicate[0].Where);
}
#endregion
}
else if (item.Config.DbType == DataDbType.MySql)
{
#region MySql
sb.AppendFormat("select {2} from {3} where {4} limit {0}, {1}"
, pModel.StarId
, pModel.PageSize
, string.Join(",", item.Field)
, table
, item.Predicate[0].Where);
#endregion
}
else if (item.Config.DbType == DataDbType.DB2)
{
#region DB2
var orderByLenght = item.Predicate[0].Where.IndexOf("order by");
sb.AppendFormat("select * from (select row_number() over ({5}) as row_number,{2} from {3} where {4}) a where a.row_number>{0} and row_number<{1} "
, pModel.StarId
, pModel.EndId
, string.Join(",", item.Field)
, table
, item.Predicate[0].Where == "" ? "" : item.Predicate[0].Where
, orderByLenght == -1 ? "" : item.Predicate[0].Where.Substring(orderByLenght, item.Predicate[0].Where.Length - orderByLenght));
#endregion
}
else if (item.Config.DbType == DataDbType.SQLite)
{
#region sqlite
sb.AppendFormat("select {2} from {3} where {4} limit {1} offset {0}"
, pModel.StarId
, pModel.PageSize
, string.Join(",", item.Field)
, table
, item.Predicate[0].Where);
#endregion
}
else if (item.Config.DbType == DataDbType.PostgreSql)
{
#region PostgreSql
sb.AppendFormat("select {2} from {3} where {4} limit {1} offset {0}"
, pModel.StarId
, pModel.PageSize
, string.Join(",", item.Field)
, table
, item.Predicate[0].Where);
#endregion
}
if (param.Count != 0)
{
cmd.Parameters.AddRange(param.ToArray());
}
if (item.IsFilter)
{
BaseFilter.Filter(param, type, item.TableName, item.Config, sb);
}
cmd.CommandText = sb.ToString();
sql = string.Format("count:{0},page:{1}", sql, ParameterToSql.ObjectParamToSql(param, sb.ToString(), item.Config));
return(cmd.ExecuteReader());
}
catch (Exception ex)
{
if (string.Compare(item.Config.SqlErrorType, SqlErrorType.Db, true) == 0)
{
DbLogTable.LogException(item.Config, ex, "ToPageDataReader", "");
}
else
{
DbLog.LogException(true, item.Config.DbType, ex, "ToPageDataReader", "");
}
return(null);
}
}
/// <summary>
/// 返回分页DataReader sql
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="dbType"></param>
/// <param name="cmd"></param>
/// <param name="pModel"></param>
/// <param name="where"></param>
/// <returns></returns>
public static DbDataReader ToPageDataReaderSql(DbParameter[] param, DbCommand cmd, PageModel pModel, string sql, ConfigModel config, ref string tempSql, FilterType type, string tableName)
{
try
{
var table = new List <string>();
if (tableName != null)
{
table.Add(tableName);
}
if (config.DbType == DataDbType.Oracle)
{
sql = string.Format("select * from(select field.*,ROWNUM RN from({0}) field where rownum<={1}) where rn>={2}"
, sql, pModel.EndId, pModel.StarId);
}
if (config.DbType == DataDbType.SqlServer)
{
sql = string.Format(@"select top {1} * from (select row_number()over(order by tempcolumn)temprownumber,*
from(select tempcolumn = 0, * from ({0})t)tt)ttt where temprownumber >= {2}"
, sql, pModel.PageSize, pModel.StarId - 1);
}
if (config.DbType == DataDbType.MySql)
{
sql = string.Format("{0} limit {1},{2}", sql, pModel.StarId, pModel.PageSize);
}
if (config.DbType == DataDbType.DB2)
{
sql = string.Format("select * from(select field.*,ROWNUM RN from({0}) field where rownum<={1}) where rn>={2}"
, sql, pModel.EndId, pModel.StarId);
}
if (config.DbType == DataDbType.PostgreSql)
{
sql = string.Format("{0} limit {1} offset {2}", sql, pModel.PageSize, pModel.StarId);
}
if (config.DbType == DataDbType.SQLite)
{
sql = string.Format("{0} limit {1} offset {2}", sql, pModel.PageSize, pModel.StarId);
}
if (param != null)
{
cmd.Parameters.AddRange(param.ToArray());
}
if (tableName != null)
{
BaseFilter.Filter(param, type, table, config, ref sql);
}
tempSql = ParameterToSql.ObjectParamToSql(param?.ToList(), sql, config);
cmd.CommandText = sql;
return(cmd.ExecuteReader());
}
catch (Exception ex)
{
if (string.Compare(config.SqlErrorType, SqlErrorType.Db, true) == 0)
{
DbLogTable.LogException(config, ex, "ToPageDataReaderSql", "");
}
else
{
DbLog.LogException(config.IsOutError, config.DbType, ex, "ToPageDataReaderSql", "");
}
return(null);
}
}