/// <summary>
/// 执行查询,返回查询结果的第一行第一列
/// </summary>
/// <typeparam name="T">返回值类型</typeparam>
/// <param name="sql">SQL查询语句</param>
/// <param name="parameters">参数集合</param>
/// <returns>查询结果的第一行第一列</returns>
public override T ExecuteScalar <T>(string sql, KdtParameterCollection parameters)
{
try
{
T value = default(T);
// 执行SQL命令
using (AseCommand cmd = new AseCommand(ReplaceSqlText(ReplaceSqlText(sql, parameters), parameters), _sybaseCn))
{
InitCommand(cmd); // 初始化
// 赋值参数
var hasConvertParams = ConvertToSqlParameter(parameters);
foreach (var item in hasConvertParams)
{
cmd.Parameters.Add(item.Value);
}
value = cmd.ExecuteScalar().Convert <T>();
cmd.Cancel();
cmd.Dispose();
}
return(value);
}
catch (Exception ex)
{
KdtLoger.Instance.Error(ex);
throw new DataException(string.Format("执行查询,返回查询结果的第一行第一列错误,原因为:{0}", ex.Message));
}
}
/// <summary>
/// 执行非查询SQL语句
/// </summary>
/// <param name="sql">SQL语句</param>
/// <param name="parameters">参数集合</param>
/// <returns>受影响的记录数</returns>
public override int ExecuteNoQuery(string sql, KdtParameterCollection parameters)
{
try
{
int effected = 0;
// 执行SQL命令
using (AseCommand cmd = new AseCommand(ReplaceSqlText(sql, parameters), _sybaseCn))
{
InitCommand(cmd); // 初始化
// 赋值参数
var hasConvertParams = ConvertToSqlParameter(parameters);
foreach (var item in hasConvertParams)
{
cmd.Parameters.Add(item.Value);
}
effected = cmd.ExecuteNonQuery();
cmd.Cancel();
cmd.Dispose();
}
return(effected);
}
catch (Exception ex)
{
KdtLoger.Instance.Error(ex);
throw new DataException(string.Format("执行非查询SQL语句错误,原因为:{0}", ex.Message));
}
}
/// <summary>
/// 读取KEY VALUE值
/// </summary>
/// <param name="sql"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public override KeyValueCollection ExecuteKVCollection(string sql, KdtParameterCollection parameters)
{
try
{
KeyValueCollection entity = new KeyValueCollection();
// 执行SQL命令
using (AseCommand cmd = new AseCommand(ReplaceSqlText(sql, parameters), _sybaseCn))
{
InitCommand(cmd); // 初始化
// 赋值参数
var hasConvertParams = ConvertToSqlParameter(parameters);
foreach (var item in hasConvertParams)
{
cmd.Parameters.Add(item.Value);
}
// 执行填充数据
using (AseDataReader reader = cmd.ExecuteReader())
{
entity = GetEntity(reader);
// 反射参数值
ReflectParamValue(parameters, hasConvertParams);
reader.Close();
reader.Dispose();
}
cmd.Cancel();
cmd.Dispose();
}
return(entity);
}
catch (AseException me)
{
KdtLoger.Instance.Error(me);
throw new DataException(me.Message);
}
catch (Exception ex)
{
KdtLoger.Instance.Error(ex);
throw new DataException(string.Format("执行SQL查询,返回数据集合错误,原因为:{0}", ex.Message));
}
}