Question

我使用QProcess运行xmllint，代码如下：

QString program = "xmllint";
    QStringList arguments;
    arguments << "--xpath";
    arguments << "\"//table_data[@name='" + tableToSearch + "']./row[./field[@name='rowuuid' and . = '" + UUIDToSearch + "']]\"";
    arguments << dataFile;
QProcess *myProcess = new QProcess();
    myProcess->start(program, arguments);
    myProcess->waitForFinished(-1);
    QString serror = myProcess->readAllStandardOutput();
    QString serror2 = myProcess->readAllStandardError();

如果我在终端中运行相同的命令，我会得到：

<row>
                <field name="surveyid">782be47c-2f05-430c-adb9-29fd0631417d</field>
                <field name="originid">FORMHUB-JSON</field>
                <field name="meta_devid">865770021186061</field>
                <field name="start_time">2017-06-06 11:23:36</field>
                <field name="survey_date">2017-06-06 00:00:00</field>
                <field name="date_yyyymmdd">20170606</field>
                <field name="subscriber_id">640021068988925</field>
                <field name="phone_number" xsi:nil="true"/>
                <field name="end_time">2017-06-06 12:54:58</field>
                <field name="onfarm_country">T</field>
                <field name="onfarm_subnatarea">CS</field>
                <field name="onfarm_village">105</field>
                <field name="onfarm_enum">105</field>
                <field name="householdid">TCS1500</field>
                <field name="householdid_key">TCS1500_20170606</field>
                <field name="bent_general">0</field>
                <field name="bext_general">1</field>
                <field name="rowuuid">b93c6113-7508-42aa-8549-267f0956b935</field>
        </row>

但myProcess-＆gt; readAllStandardOutput（）返回：

//table_data[@name='birdentext_maintable']./row[./field[@name='rowuuid' and . = 'b93c6113-7508-42aa-8549-267f0956b935']]

我修改了代码以使用readyReadStandardError信号，以防以后发送更多数据，但我得到相同的信息。

知道这里发生了什么吗？

从QProcess调用xmllint会返回错误的StandardOutput

0 个答案: