C# 错误 ;1和x9;无法创建抽象接口-C的实例#
好的,我知道它的意思,但我不知道如何解决它 这是我的界面C# 错误 ;1和x9;无法创建抽象接口-C的实例#,c#,.net,class,interface,mozilla,C#,.net,Class,Interface,Mozilla,好的,我知道它的意思,但我不知道如何解决它 这是我的界面 public interface nsIDownloadProgressListener { nsIDOMDocument getDocument(); void setDocument(nsIDOMDocument doc); void OnDownloadStateChange(short state, nsIDownload
public interface nsIDownloadProgressListener
{
nsIDOMDocument getDocument();
void setDocument(nsIDOMDocument doc);
void OnDownloadStateChange(short state, nsIDownload aDownload);
void OnStateChange(nsIWebProgress aWebProgress, nsIRequest aRequest, uint
aStateFlags, object aStatus, nsIDownload aDownload);
void OnProgressChange(nsIWebProgress WbProgress, nsIRequest aReq, int
curSelfProgress, int maxSelfProgress, int curTotalProgress, int
maxTotalProgress, nsIDownload aDownload);
void OnSecurityChange(nsIWebProgress wbProgress, nsIRequest aReq, uint
aState, nsIDownload aDownload);
}
下面是我用来继承接口的类
public class DownloadProgressListenerClass : nsIDownloadProgressListener
{
#region nsIDownloadProgressListener Members
nsIDOMDocument Nothingreturned;
public nsIDOMDocument getDocument()
{
return Nothingreturned;
}
public void setDocument(nsIDOMDocument doc)
{
}
public void OnDownloadStateChange(short state, nsIDownload aDownload)
{
MessageBox.Show(aDownload.getId().ToString());
OnDownloadStateChange(state, aDownload);
}
public void OnStateChange(nsIWebProgress aWebProgress, nsIRequest aRequest, uint aStateFlags, object aStatus, nsIDownload aDownload)
{
MessageBox.Show(aDownload.getId().ToString());
}
public void OnProgressChange(nsIWebProgress WbProgress, nsIRequest aReq, int curSelfProgress, int maxSelfProgress, int curTotalProgress, int maxTotalProgress, nsIDownload aDownload)
{
MessageBox.Show(aDownload.getId().ToString());
}
public void OnSecurityChange(nsIWebProgress wbProgress, nsIRequest aReq, uint aState, nsIDownload aDownload)
{
MessageBox.Show(aDownload.getId().ToString());
}
#endregion nsIDownloadProgressListener Members
}
然后我尝试将侦听器添加到DLManager,它应该可以工作并报告进度
DownloadProgressListenerClass DLListener = new DownloadProgressListenerClass();
DLManager = Xpcom.GetService<nsIDownloadManager>("@mozilla.org/download-manager;1");
DLManager.addListner(DLListener);
DownloadProgressListenerClass DLListener=new DownloadProgressListenerClass();
DLManager=Xpcom.GetService(@mozilla.org/download-manager;1);
DLManager.addListner(DLListener);
它有什么问题吗?因为它编译正确,但当我尝试下载文件时,它不会触发任何事件,也不会按预期显示messagebox。我怀疑您的addListener方法在代码行中预期的接口类型是
nsildownloadProgressListener
:DLManager.addListener(DLListener);
如果是这样,请将您的
DownloadProgressListenerClass DLListener=new DownloadProgressListenerClass();
更改为
nsDownloadProgressListener DLListener=new DownloadProgressListenerClass();
如果您需要解释,请告诉我。为什么您的问题标题所指的内容不在您的问题正文中?