小编gti*_*ilx的帖子

我试图导入.sql文件,并在创建表时失败.

这是失败的查询:

CREATE TABLE `data` (
`id` int(10) unsigned NOT NULL,
`name` varchar(100) NOT NULL,
`value` varchar(15) NOT NULL,
UNIQUE KEY `id` (`id`,`name`),
CONSTRAINT `data_ibfk_1` FOREIGN KEY (`id`) REFERENCES `keywords` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=latin1;    

我从同一个数据库导出.sql,我删除了所有的表,现在我试图导入它,为什么它失败了？

MySQL:无法创建表'./dbname/data.frm'(错误号:150)

我正在开发一个firefox扩展,我想知道一个页面何时启动xhr请求,我看到了一些代码,但它们非常大,是否有任何简单的示例来实现这一点？

我正在测试这段代码:

function TracingListener() {
    //this.receivedData = [];
}

TracingListener.prototype =
{
    originalListener: null,
    receivedData: null,   // array for incoming data.

    onDataAvailable: function(request, context, inputStream, offset, count)
    {
        var binaryInputStream = CCIN("@mozilla.org/binaryinputstream;1", "nsIBinaryInputStream");
        var storageStream = CCIN("@mozilla.org/storagestream;1", "nsIStorageStream");
        binaryInputStream.setInputStream(inputStream);
        storageStream.init(8192, count, null);

        var binaryOutputStream = CCIN("@mozilla.org/binaryoutputstream;1",
                "nsIBinaryOutputStream");

        binaryOutputStream.setOutputStream(storageStream.getOutputStream(0));

        // Copy received data as they come.
        var data = binaryInputStream.readBytes(count);
        //var data = inputStream.readBytes(count);
        this.receivedData.push(data);

        binaryOutputStream.writeBytes(data, count);
        this.originalListener.onDataAvailable(request, context,storageStream.newInputStream(0), offset, count);
    },

    onStartRequest: function(request, context) {
        this.receivedData = [];
        this.originalListener.onStartRequest(request, context); …

有人有关于如何使用 c++ 将带有 upnp 的端口转发条目添加到路由器的简单示例吗？

有没有办法让HTML textarea元素只允许一行？

我想这样做是因为我将有一个按钮来展开它,但是如果在textarea未展开(仅1行)时允许用户输入多行,它看起来不太好,如果我使用文本框不是扩展状态,当我用textarea替换它并用动画扩展它时看起来很奇怪.