string strFileFullPath=Server.MapPath(System.Configuration.ConfigurationSettings.AppSettings["FileFullPath"]);
string strConn=string.Fromat("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0}",strFileFullPath);
OleDbConnection oleConn=new OleDbConnection(strConn);
oleConn.Open();
OleDbCommand oleCmd=new OleDbCommand("select count(*) from Register where user_ID="+userID+" and user_Pwd="+userPwd,oleConn);
int count=Convert.ToInt32(oleCmd.ExecuteScalar());
if(count>0)1
{
  Response.Write("Successed in Resgister!");
}
else
{
  Response.Write("File in Resgister!");
}调试提示错误是 int count=Convert.ToInt32(oleCmd.ExecuteScalar()); 标准表达式中数据类型不匹配   该怎么改呀?