WPF MVVM双击打开文件
本项目是WPF 使用Mvvm设计模式，进行开发的桌面软件工程
需求中需要还软件中双击打开软件内的的文件。
v 为一个页面中item的子项。双击该子项打开子项中的文件
- 使用触发器进行操作，通过触发双击命令打开，但由于打开的相关命令需要传多参数。触发器传值存在问题（使用触发器进行传值，可指定相关对象）
如果不需要多参数传值，可使用该方法，通过为当前的控件添加触发，添加双击触发执行对应的命令。 - vm中使用统计功能，对点击次数进行判断，如当前软件的文件被点击的次数大于或等于两次执行打开打操作
点击的是不是当前的对象，点击了多少次
int clickNub = 0;//定义一个计数，统计点击次数
double timespan = 0;//定义时间戳
private void OpenOffice(object[] objArr)
{
clickNub++;//每点击一次加一
var fileInfo = objArr[0] as IssuesData;//提取内容
if (clickNub%2==0)
{
if (Toolkit.Utilities.Common.GetTimeStamp() - timespan > 1200||fileid!= fileInfo.id.ToString())//当前时间内点击的对象
{
clickNub = 1;//置1
}
}
fileid = fileInfo.id.ToString();
timespan = Toolkit.Utilities.Common.GetTimeStamp();
if ((objArr[1]?.ToString().ToLower() == "false"))
{
clickNub = 2;
}
if (clickNub % 2 == 0)
{
clickNub = 0;
Progress = 0;
IsLoading = true;
if (fileInfo.fileType == 0)
{
//文件夹
GetMeetingDatabyfloider(fileInfo.id);
_SendBackPath(fileInfo.id, fileInfo.fileName, true);
}
if (fileInfo.fileSuffix.ToUpper().Contains("PDF"))
{
OfficeMinimizeWindow info = new OfficeMinimizeWindow();
info.id = fileInfo.id;
if (_IsSaveintheOfficeinimizeList == null)
{
PdfName = fileInfo.fileName;
Pdfid = fileInfo.id;
DownPdfImage(objArr);
//var result=
}
else
{
if (!_IsSaveintheOfficeinimizeList(info))//判断是否已经存在用于最小化防止多次打开
{
IsLoading = false;
//PdfName = fileInfo.fileName;
//Pdfid = fileInfo.id;
//DownPdfImage(objArr);
}
else
{
PdfName = fileInfo.fileName;
Pdfid = fileInfo.id;
DownPdfImage(objArr);
}
}
}
else
{
var update = new Action<double>(p =>
{
DispatcherHelper.CheckBeginInvokeOnUI(() =>
{
Progress = p;
});
});
Task.Factory.StartNew(() =>
{
try
{
if (fileInfo.fileType != 0)
{
IsLoading = true;
string savePathFlag = Global.MeetingFilesPath + Global.MeetingId + "\\" + fileInfo.meetingIssuesId;
string path = HttpRequester.DownloadData(fileInfo.filePath, savePathFlag, fileInfo.fileName, update);
if (!string.IsNullOrWhiteSpace(path))
{
IsLoading = false;
DispatcherHelper.CheckBeginInvokeOnUI(() =>
{
try
{
remark = new ReMarkWindow();
remark.Hide();
}
catch (Exception) { remark.Close(); }
if (Global.document.Contains(fileInfo.fileSuffix.ToLower()))
{
if (bool.Parse(objArr[1].ToString()))
{
string destPath = $"{System.IO.Path.GetDirectoryName(path)}\\只读{System.IO.Path.GetFileName(path)}";
if (!System.IO.File.Exists(destPath))
{
System.IO.File.Copy(path, destPath);
System.IO.File.SetAttributes(destPath, System.IO.FileAttributes.ReadOnly);
}
OfficeMinimizeWindow officeMinimize = new OfficeMinimizeWindow();
officeMinimize.id = fileInfo.id;
if (_IsSaveintheOfficeinimizeList == null)
{
if (remark != null && remark.OpenReadOnly(destPath))
{
remark.Show();
//将office文档的名称传入到RemarkWindow
_SendDataName(fileInfo.fileName, fileInfo.id, openType);
}
else
{
System.Diagnostics.Process.Start(destPath);
}
}
else
{
if (!_IsSaveintheOfficeinimizeList(officeMinimize))
{
IsLoading = false;
remark.Close();
}
else
{
//remark.Show();
////将office文档的名称传入到RemarkWindow
//_SendDataName(fileInfo.fileName, fileInfo.id);
if (remark != null && remark.OpenReadOnly(destPath))
{
remark.Show();
//将office文档的名称传入到RemarkWindow
_SendDataName(fileInfo.fileName, fileInfo.id, openType);
}
else
{
System.Diagnostics.Process.Start(destPath);
}
}
}
}
else
{
//string destPath = $"{Global.NoteFileFilesPath}\\{System.IO.Path.GetFileNameWithoutExtension(path)}_{Global.UserName}批注_{Toolkit.Utilities.Common.GetDateNow()}{System.IO.Path.GetExtension(path)}";
string destPath = $"{Global.NoteFileFilesPath}\\{System.IO.Path.GetFileNameWithoutExtension(path)}_{Global.UserName}批注_{DateTime.Now.ToString("yyyyMMddHHmmss")}{System.IO.Path.GetExtension(path)}";
if (remark != null && remark.OpenReMark(path, destPath))
{
remark.Show();
//将office文档的名称传入到RemarkWindow
_SendDataName(fileInfo.fileName, fileInfo.id, openType);
}
else
{
_saveWatcher.Start();
_saveWatcher.Open(path, destPath);
//System.Diagnostics.Process.Start(destPath);
}
//_saveWatcher.Open(path, destPath);
}
}
else
if (fileInfo.fileSuffix.Equals("png") || fileInfo.fileSuffix.Equals("jpg") || fileInfo.fileSuffix.Equals("JPG") || fileInfo.fileSuffix.Equals("PNG"))
{
WindowSingleton.Show<PictureUC>();
List<string> _picpath = new List<string>();
for (int i = 0; i < PictureData.Count; i++)
{
string PicPath = HttpRequester.DownloadData(PictureData[i].filePath, savePathFlag, PictureData[i].fileName, update);
_picpath.Add(PicPath);
}
_Picpath(path, _picpath);
_piclist(_picpath);
}
else if (fileInfo.fileType == 3)
{
WindowSingleton.Show<VideoUC>();
_VedioUrlList(fileInfo.filePath, VedioData, savePathFlag);
IsLoading = false;
}
else
{
System.Diagnostics.Process.Start(path);
}
});
}
}
else if (fileInfo.fileType == 0)
{
IsLoading = false;
}
}
catch (Exception ex)
{
DispatcherHelper.CheckBeginInvokeOnUI(() =>
{
IsLoading = false;
MessageBox.Show(ex);
});
}
});
}
}
}
总结：上面的俩方法都能实现双击打开的操作，相对于第二个方法。第一个方法更为简单，但通过触发器传参，多个值的时候很麻烦。
使用第二个方法时，需考虑各种情况。
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