Question

我是WT新手，我正在尝试上传文件示例。当我单击发送按钮文件进度条运行到100％时，代码工作正常，但我不知道它在哪里上传？我们可以定义上传某个路径..

class HelloApplication: public WApplication {
public:
    HelloApplication(const WEnvironment& env);

private:

    WPushButton *uploadButton;
    Wt::WFileUpload *fu;

    void greet();
};

HelloApplication::HelloApplication(const WEnvironment& env) :
        WApplication(env) {
    root()->addStyleClass("container");
    setTitle("Hello world");       // application title

    fu = new Wt::WFileUpload(root());
    fu->setFileTextSize(50); // Set the maximum file size to 50 kB.
    fu->setProgressBar(new Wt::WProgressBar());
    fu->setMargin(10, Wt::Right);

    // Provide a button to start uploading.
    uploadButton = new Wt::WPushButton("Send", root());
    uploadButton->setMargin(10, Wt::Left | Wt::Right);

    // Upload when the button is clicked.

    uploadButton->clicked().connect(this, &HelloApplication::greet);
}

void HelloApplication::greet() {
    fu->upload();
    uploadButton->disable();

}

WApplication *createApplication(const WEnvironment& env) {

    return new HelloApplication(env);
}

int main(int argc, char **argv) {
    return WRun(argc, argv, &createApplication);
}

Answer 1

WFileUpload将在文件完成时触发信号（uploaded（））。然后查看spoolFileName（）以获取本地磁盘上文件的文件名。同时监听fileTooLarge（），因为它会通知您上传失败。

WFileUpload手册附带了大量信息和代码示例： http://www.webtoolkit.eu/wt/doc/reference/html/classWt_1_1WFileUpload.html

Answer 2

我意识到这是一个老帖子，但我也有问题，问题没有得到很好的回答（特别是读取文件内容所需的 uploadedFiles 功能）

在你的构造函数（即HelloApplication :: HelloApplication函数）中添加它以响应fileUploaded信号：

uploadButton->uploaded().connect(this, &HelloApplication::fileUploaded);

然后添加这样的函数来读取文件的内容：

void HelloApplication::fileUploaded() {
    //The uploaded filename
    std::string mFilename = fu->spoolFileName(); 

    //The file contents
    std::vector<Wt::Http::UploadedFile> mFileContents = fu->uploadedFiles();

    //The file is temporarily stored in a file with location here
    std::string mContents;
    mContents=mFileContents.data()->spoolFileName();

    //Do something with the contents here
    //Either read in the file or copy it to use it

    //return
    return;
}

我希望这可以帮助其他重定向的人。

使用wt上传文件

2 个答案: