WPF 数据绑定 ProgressBar 未显示进度
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原文地址: http://stackoverflow.com/questions/19776786/
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WPF Data bound ProgressBar not showing progress
提问by bas
I am having troubles with getting the ProgressBar working.
我在让 ProgressBar 工作时遇到了麻烦。
XAML:
XAML：
<ProgressBar x:Name="ProgressBar" Value="{Binding Progress, UpdateSourceTrigger=PropertyChanged}" HorizontalAlignment="Left" Height="37" Margin="10,35,0,0" VerticalAlignment="Top" Width="590"/>
Code behind:
后面的代码：
ProgressBar.DataContext = progressModel;
IProgressModel:
IProgressModel：
public interface IProgressModel
{
double Minimum { get; set; }
double Maximum { get; set; }
double Progress { get; }
}
Implementation:
执行：
private void WorkerOnDoWork(object sender, DoWorkEventArgs doWorkEventArgs)
{
Minimum = 0;
Maximum = RenamableFiles.Count;
var i = 0;
foreach (var renamableFile in RenamableFiles)
{
var oldFilename = ReCreateOldFileName(renamableFile);
var renameProposalFilename = CreateNewFileName(renamableFile);
if (oldFilename != null && renameProposalFilename != null && !oldFilename.Equals(renameProposalFilename))
{
// File.Move(oldFilename, renameProposalFilename);
Thread.Sleep(100);
Progress = i++;
}
}
}
And the pretty straight forward PropertyChanged mechanism:
还有非常直接的 PropertyChanged 机制：
private double _progress;
public double Progress
{
get { return _progress; }
set
{
_progress = value;
OnPropertyChanged();
}
}
public event PropertyChangedEventHandler PropertyChanged;
[NotifyPropertyChangedInvocator]
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
var handler = PropertyChanged;
if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
}
The ProgressBar starts "full" and remains that way throughout the process. I have read all related threads on SO, but no luck.
ProgressBar 开始“满”并在整个过程中保持这种状态。我已阅读有关 SO 的所有相关主题，但没有运气。
What am I doing wrong?
我究竟做错了什么？
Thx in advance.
提前谢谢。
回答by Reed Copsey
You need to bind your maximum, too:
您还需要绑定最大值：
<ProgressBar x:Name="ProgressBar"
Value="{Binding Progress}"
Maximum="{Binding Maximum}"
Minimum="{Binding Minimum}"
HorizontalAlignment="Left" Height="37" Margin="10,35,0,0"
VerticalAlignment="Top" Width="590"/>
