C#对System.Data的数据类型及Oracle.DataAccess类型，问题

[kingmax54212008]

报错如下：
Cannot convert type 'System.Data.Common.DbParameter' to 'Oracle.DataAccess.Client.OracleParameter'


对应源码：

/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="SQLStringList">多条SQL语句</param>
public static bool ExecuteSqlTran(string conStr, List<CommandInfo> cmdList)
{
using (OracleConnection conn = new OracleConnection(conStr))
{
conn.Open();
OracleCommand cmd = new OracleCommand();
cmd.Connection = conn;
OracleTransaction tx = conn.BeginTransaction();
cmd.Transaction = tx;
try
{
foreach (CommandInfo c in cmdList)
{
if (!String.IsNullOrEmpty(c.CommandText))
{
PrepareCommand(cmd, conn, tx, CommandType.Text, c.CommandText, (OracleParameter[])c.Parameters); // 此行位置，扔出异常
if (c.EffentNextType == EffentNextType.WhenHaveContine || c.EffentNextType == EffentNextType.WhenNoHaveContine)
{
if (c.CommandText.ToLower().IndexOf("count(") == -1)
{
tx.Rollback();
throw new Exception("Oracle:违背要求" + c.CommandText + "必须符合select count(..的格式");
//return false;
}

object obj = cmd.ExecuteScalar();
bool isHave = false;
if (obj == null && obj == DBNull.Value)
{
isHave = false;
}
isHave = Convert.ToInt32(obj) > 0;

if (c.EffentNextType == EffentNextType.WhenHaveContine && !isHave)
{
tx.Rollback();
throw new Exception("Oracle:违背要求" + c.CommandText + "返回值必须大于0");
//return false;
}
if (c.EffentNextType == EffentNextType.WhenNoHaveContine && isHave)
{
tx.Rollback();
throw new Exception("Oracle:违背要求" + c.CommandText + "返回值必须等于0");
//eturn false;
}
continue;
}
int res = cmd.ExecuteNonQuery();
if (c.EffentNextType == EffentNextType.ExcuteEffectRows && res == 0)
{
tx.Rollback();
throw new Exception("Oracle:违背要求" + c.CommandText + "必须有影像行");
// return false;
}
}
}
tx.Commit();
return true;
}
catch (System.Data.OracleClient.OracleException E)
{
tx.Rollback();
throw E;
}
finally
{
if (conn.State != ConnectionState.Closed)
{
conn.Close();
}
}
}
}

[iqlife]

你这个参数里面是否含有特殊类型？类型转换错误造成的，或者和数据库的表类型不对应造成的