动态执行x++代码

public void countRecords()
{
    XppCompiler             compiler;
    ExecutePermission       perm;
    str                     sqlcmd;
    str                     name;
    str                     condition;
    str                     ret;
    ;

    name        = StringEdit_TableName.text();
    condition   = StringEdit_Condition.text();

    if(name == "")
    {
        StringEdit_Result.text("请输入表名！");
        return;
    }

    sqlcmd =  " str runsql(str parm) ";
    sqlcmd += " { ";
    sqlcmd += name;
    sqlcmd += " t; ";
    sqlcmd += " select count(recid) from t ";
    if(condition)
    {
        sqlcmd += " where " + condition;
    }
    sqlcmd += " ; ";
    sqlcmd += " return int642str(t.recid); ";
    sqlcmd += " }";

    perm = new ExecutePermission();
    if (perm == null)
    {
        return;
    }

    perm.assert();
    compiler = new XppCompiler();

    if (sqlcmd)
    {
        if (compiler.compile(sqlcmd))
        {
            ret = compiler.execute(0);
        }
        else
        {
            ret = compiler.errorText();
        }
    }

    CodeAccessPermission::revertAssert();

    StringEdit_Result.text(ret);
}