WPF实现简单的进度条怎么做？(2)-木庄网络博客

1、因为ProgressbBar的Foreground显示不得不一样，所以，要有一个参数去给控件进行设置，因此定义了一个参数值ForegroundColor

public int ForegroundColor
{get{return _foregroundColor;
    }set{
        _foregroundColor = value;
        LinearGradientBrush lgb = dictionary["ForegroundColor" + value] as LinearGradientBrush;if (lgb != null)
            proBar.Foreground = txt.Foreground = percent.Foreground = lgb;
    }
}

代码里有这么一句话“LinearGradientBrush lgb = dictionary["ForegroundColor" + value] as LinearGradientBrush;”是为了方便通过这是这个参数去样式文件里取样式的。

<LinearGradientBrush x:Key="ForegroundColor1" EndPoint="1,0.5" StartPoint="0,0.5"><GradientStop Color="#FFBBF586" Offset="0.5"/><GradientStop Color="#FFD4F9C3" Offset="1"/></LinearGradientBrush><LinearGradientBrush x:Key="ForegroundColor2" EndPoint="1,0.5" StartPoint="0,0.5"><GradientStop Color="#FF5BE26E" Offset="0.5"/><GradientStop Color="#FF8DEC9C" Offset="1"/></LinearGradientBrush><LinearGradientBrush x:Key="ForegroundColor3" EndPoint="1,0.5" StartPoint="0,0.5"><GradientStop Color="#FFB656F2" Offset="0.5"/><GradientStop Color="#FFAE8DFE" Offset="1"/></LinearGradientBrush><LinearGradientBrush x:Key="ForegroundColor4" EndPoint="1,0.5" StartPoint="0,0.5"><GradientStop Color="#FF3AE9E9" Offset="0.5"/><GradientStop Color="#FF8DFDFE" Offset="1"/></LinearGradientBrush>

2、既然是ProgressBar就要有一个进度值，这个值，我们用TextBlock来进行显示，一定要实现通知接口，这样，才能保证实时的通知到页面上。

public string ValueText
{get{return _valueText;
    }set{
        _valueText = value;if (this.PropertyChanged != null)
        {this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs("ValueText"));
        }
    }
}

3、启用一个后台线程，来不断的更新进度效果

private void Bgw_DoWork(object sender, DoWorkEventArgs e)
{for (int i = 0; i < BarValue; i++)
    {
        System.Threading.Thread.Sleep(50);
        proBar.Dispatcher.Invoke(new Action(                                     delegate{if (proBar.Value <= BarValue)
            {
                proBar.Value++;
            }
        }));
        ValueText = i + "";
    }
    ValueText = BarValue + "";
}