//public static void CheckStringPara(string SQL,string tableName, IDataParameter[] paras,string parameterChar)
//{
// for (int index = 0; index < paras.Length; index++)
// {
// //为字符串类型的参数指定长度 edit at 2012.4.23
// if (paras[index].Value != null && paras[index].Value.GetType() == typeof(string))
// {
// string field = FindFieldNameInSql(SQL, paras[index].ParameterName, parameterChar);
// ((IDbDataParameter)paras[index]).Size = EntityBase.GetStringFieldSize(tableName, field);
// }
// }
//}
/// <summary>
/// 使用SQL查询命令信息 执行数据阅读器查询。注意，查询单行数据不支持存储过程。
/// </summary>
/// <param name="si">SQL查询命令信息</param>
/// <param name="db">数据访问对象</param>
/// <param name="single">是否仅查询单行数据</param>
/// <returns>数据阅读器</returns>
public static IDataReader ExecuteDataReader(SqlInfo si, AdoHelper db, bool single)
{
IDataReader reader = null;
if (si.Parameters != null && si.Parameters.Count > 0)
{
IDataParameter[] paras = GetParameters(si.Parameters, db);
if (single)
{
reader = db.ExecuteDataReaderWithSingleRow(si.SQL, paras);
}
else
{
reader = db.ExecuteDataReader(si.SQL, si.CommandType, paras);
}
}
else
{
if (single)
{
reader = db.ExecuteDataReaderWithSingleRow(si.SQL);
}
else
{
reader = db.ExecuteDataReader(si.SQL, si.CommandType, null);
}
}
return(reader);
}
/// <summary>
/// 根据OQL查询数据获得DataReader。如果指定single=真，将执行优化的查询以获取单条记录
/// </summary>
/// <param name="oql">OQL表达式</param>
/// <param name="db">当前数据库访问对象</param>
/// <param name="factEntityType">实体类类型</param>
/// <param name="single">是否只查询一条记录</param>
/// <returns>DataReader</returns>
public static IDataReader ExecuteDataReader(OQL oql, AdoHelper db, Type factEntityType, bool single)
{
string sql = "";
Dictionary <string, object> Parameters = null;
//处理用户查询映射的实体类
if (oql.EntityMap == PWMIS.Common.EntityMapType.SqlMap)
{
if (CommonUtil.CacheEntityMapSql == null)
{
CommonUtil.CacheEntityMapSql = new Dictionary <string, string>();
}
if (!CommonUtil.CacheEntityMapSql.ContainsKey(oql.sql_table))
{
string tempView = GetMapSql(factEntityType);
CommonUtil.CacheEntityMapSql.Add(oql.sql_table, tempView);
}
sql = oql.GetMapSQL(CommonUtil.CacheEntityMapSql[oql.sql_table]);
//如果用户本身没有初始化参数对象，则这里声明一个 edit at 2012.11.16
Parameters = oql.InitParameters ?? new Dictionary <string, object>();
if (oql.Parameters != null && oql.Parameters.Count > 0)
{
foreach (string name in oql.Parameters.Keys)
{
Parameters.Add(name, oql.Parameters[name]);
}
}
}
else if (oql.EntityMap == PWMIS.Common.EntityMapType.StoredProcedure)
{
string script = "";
if (CommonUtil.CacheEntityMapSql == null)
{
CommonUtil.CacheEntityMapSql = new Dictionary <string, string>();
}
//获取SQL-MAP脚本
if (CommonUtil.CacheEntityMapSql.ContainsKey(oql.sql_table))
{
script = CommonUtil.CacheEntityMapSql[oql.sql_table];
}
else
{
script = GetMapSql(factEntityType);
CommonUtil.CacheEntityMapSql.Add(oql.sql_table, script);
}
//对SQL-MAP格式的参数进行解析
SqlMap.SqlMapper mapper = new PWMIS.DataMap.SqlMap.SqlMapper();
mapper.DataBase = db;
//解析存储过程名称
sql = mapper.FindWords(mapper.GetScriptInfo(script), 0, 255); //由于是存储过程，需要特殊处理，调用 FindWords方法
//解析参数
IDataParameter[] paras = mapper.GetParameters(script);
if (oql.InitParameters != null && oql.InitParameters.Count > 0)
{
try
{
foreach (IDataParameter para in paras)
{
string key = para.ParameterName.TrimStart(db.GetParameterChar.ToCharArray());
para.Value = oql.InitParameters[key];
}
}
catch (KeyNotFoundException exKey)
{
throw new KeyNotFoundException("'存储过程实体类'的初始化参数中没有找到指定的参数名，请检查参数定义和设置。", exKey);
}
catch (Exception ex)
{
throw ex;
}
}
else
{
if (paras.Length > 0)
{
throw new Exception("当前'存储过程实体类'需要提供初始化参数，请设置OQL对象的InitParameters属性");
}
}
return(db.ExecuteDataReader(sql, CommandType.StoredProcedure, paras));
}
else
{
//edit at 2013-2-25 处理非SQLSERVER的参数名前缀问题
if (db is SqlServer)
{
sql = oql.ToString();
}
else
{
sql = oql.ToString().Replace("@", db.GetParameterChar);
}
Parameters = oql.Parameters;
}
//处理实体类分页 2010.6.20
if (oql.PageEnable && !single)
{
switch (db.CurrentDBMSType)
{
case PWMIS.Common.DBMSType.Access:
case PWMIS.Common.DBMSType.SqlServer:
case PWMIS.Common.DBMSType.SqlServerCe:
//如果含有Order By 子句，则不能使用主键分页
if (oql.HaveJoinOpt || sql.IndexOf("order by", StringComparison.OrdinalIgnoreCase) > 0)
{
sql = PWMIS.Common.SQLPage.MakeSQLStringByPage(PWMIS.Common.DBMSType.SqlServer, sql, "", oql.PageSize, oql.PageNumber, oql.PageWithAllRecordCount);
}
else
{
if (oql.PageOrderDesc)
{
sql = PWMIS.Common.SQLPage.GetDescPageSQLbyPrimaryKey(oql.PageNumber, oql.PageSize, oql.sql_fields, oql.sql_table, oql.PageField, oql.sql_condition);
}
else
{
sql = PWMIS.Common.SQLPage.GetAscPageSQLbyPrimaryKey(oql.PageNumber, oql.PageSize, oql.sql_fields, oql.sql_table, oql.PageField, oql.sql_condition);
}
}
break;
//case PWMIS.Common.DBMSType.Oracle:
// sql = PWMIS.Common.SQLPage.MakeSQLStringByPage(PWMIS.Common.DBMSType.Oracle, sql, "", oql.PageSize, oql.PageNumber, oql.PageWithAllRecordCount);
// break ;
//case PWMIS.Common.DBMSType.MySql:
//case PWMIS.Common.DBMSType.SQLite:
// sql = PWMIS.Common.SQLPage.MakeSQLStringByPage(PWMIS.Common.DBMSType.MySql, sql, "", oql.PageSize, oql.PageNumber, oql.PageWithAllRecordCount);
// break;
//case PWMIS.Common.DBMSType.PostgreSQL:
// sql = PWMIS.Common.SQLPage.MakeSQLStringByPage(PWMIS.Common.DBMSType.PostgreSQL, sql, "", oql.PageSize, oql.PageNumber, oql.PageWithAllRecordCount);
// break;
default:
sql = PWMIS.Common.SQLPage.MakeSQLStringByPage(db.CurrentDBMSType, sql, "", oql.PageSize, oql.PageNumber, oql.PageWithAllRecordCount);
break;
}
}
IDataReader reader = null;
if (Parameters != null && Parameters.Count > 0)
{
int fieldCount = Parameters.Count;
IDataParameter[] paras = new IDataParameter[fieldCount];
int index = 0;
foreach (string name in Parameters.Keys)
{
paras[index] = db.GetParameter(name, Parameters[name]);
//为字符串类型的参数指定长度 edit at 2012.4.23
if (paras[index].Value != null && paras[index].Value.GetType() == typeof(string))
{
string field = FindFieldNameInSql(sql, name, db.GetParameterChar);
((IDbDataParameter)paras[index]).Size = EntityBase.GetStringFieldSize(oql.sql_table, field);
}
index++;
}
if (single)
{
reader = db.ExecuteDataReaderWithSingleRow(sql, paras);
}
else
{
reader = db.ExecuteDataReader(sql, CommandType.Text, paras);
}
}
else
{
if (single)
{
reader = db.ExecuteDataReaderWithSingleRow(sql);
}
else
{
reader = db.ExecuteDataReader(sql);
}
}
return(reader);
}