WPF自定义实现上传文件显示进度的按钮控件
作者：BruceNeter
自定义控件在WPF开发中是很常见的，有时候某些控件需要契合业务或者美化统一样式，这时候就需要对控件做出一些改造，本文就来自定义实现一个上传文件显示进度的按钮控件吧
话不多说直接看效果
默认效果:
上传效果:
按钮设置圆角
因为按钮本身没有CornerRadius属性，所以只能重写Button的控件模板。
<Style TargetType="Button">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Border CornerRadius="5"
Width="{TemplateBinding Width}"
Background="{TemplateBinding Background}"
BorderThickness="1"
Height="{TemplateBinding Height}">
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>在按钮的模板中加入一个Border即可，但是按钮本身没有CornerRadius属性，就没办法使用TemplateBinding ，只能写死在样式，那肯定不行，所以我们就需要拓展一下Button按钮。
1.创建一个类MyProgressButton继承Button类，由于是新创建的一个类，所以我们可以直接使用依赖属性来完成这件事，在MyProgressButton中定义一个圆角弧度的依赖属性。
public CornerRadius CornerRadius
{
get { return (CornerRadius)GetValue(CornerRadiusProperty); }
set { SetValue(CornerRadiusProperty, value); }
}
public static readonly DependencyProperty CornerRadiusProperty =
DependencyProperty.Register(nameof(CornerRadius), typeof(CornerRadius), typeof(MyProgressButton), new PropertyMetadata(default));2.创建一个ProgressButtonStyle.xaml的资源文件，针对MyProgressButton定义一些样式，包括弧度的绑定和鼠标移入移出的阴影效果，让我们的按钮立体起来
<Style TargetType="local:MyProgressButton">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:MyProgressButton">
<Border CornerRadius="{TemplateBinding CornerRadius}"
Width="{TemplateBinding Width}"
Background="{TemplateBinding Background}"
BorderThickness="1"
Height="{TemplateBinding Height}">
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="False">
<Setter Property="Effect">
<Setter.Value>
<DropShadowEffect Color="#cccccc" Direction="270" ShadowDepth="2" Opacity="1" />
</Setter.Value>
</Setter>
</Trigger>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Effect" >
<Setter.Value>
<DropShadowEffect Color="#bbbbbb" Direction="270" ShadowDepth="2" Opacity="1" />
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>3.最后在主界面将MyProgressButton的命名控件加入进来,并且用xaml创建一个MyProgressButton按钮，自定义一些属性，并且将ProgressButtonStyle.xaml样式加入到App.xaml中
<Window x:Class="ProgressButton.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:ProgressButton"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<Grid>
<local:MyProgressButton Content="上传文件"
Foreground="#555555"
Cursor="Hand"
FontSize="14"
CornerRadius="5"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Height="40" Width="135"
Background="Salmon"
x:Name="upload_btn">
</local:MyProgressButton>
</Grid>
</Window><Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/ProgressButton;component/Button/ProgressButtonStyle.xaml"></ResourceDictionary>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>看看效果:
按钮上传文件相关定义
1.定义按钮类型MyProgressButton的文件上传进度，是否上传，以及上传时按钮背景色三个依赖属性
/// <summary>
/// 文件上传进度
/// </summary>
public double Progress
{
get { return (double)GetValue(ProgressProperty); }
set { SetValue(ProgressProperty, value); }
}
public static readonly DependencyProperty ProgressProperty =
DependencyProperty.Register(nameof(Progress), typeof(double), typeof(MyProgressButton), new PropertyMetadata(double.NegativeZero, OnProgressChanged));
/// <summary>
/// 文件是否上传
/// </summary>
public bool IsUploading
{
get { return (bool)GetValue(IsUploadingProperty); }
set { SetValue(IsUploadingProperty, value); }
}
public static readonly DependencyProperty IsUploadingProperty =
DependencyProperty.Register(nameof(IsUploading), typeof(bool), typeof(MyProgressButton), new PropertyMetadata(false, OnIsUploadingChanged));
/// <summary>
/// 上传时按钮背景色
/// </summary>
public Color UploadingColor
{
get { return (Color)GetValue(UploadingColorProperty); }
set { SetValue(UploadingColorProperty, value); }
}
// Using a DependencyProperty as the backing store for UploadingColor. This enables animation, styling, binding, etc...
public static readonly DependencyProperty UploadingColorProperty =
DependencyProperty.Register(nameof(UploadingColor), typeof(Color), typeof(MyProgressButton), new PropertyMetadata(Colors.White));2.如何实现按钮内部的进度显示？有几种办法，比如使用渐进色修改偏移，或者按钮内部套一个进度条，或者按钮内部放两个不同颜色的块控件，动态修改两者的长度。我们选择第一种。
在Progress属性被修改的时候，我们动态修改下按钮内部渐进色的偏移。为ProgressProperty添加值变化的回调。
private static void OnProgressChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var btn = d as MyProgressButton;
var progress = (double)e.NewValue;
if (progress != double.NegativeZero)
{
Brush brush = null;
if ((brush = btn.Background as LinearGradientBrush) != null) //如果按钮本身是线性渐变色则直接修改偏移
{
GradientStopCollection collections =
brush.GetValue(GradientBrush.GradientStopsProperty) as GradientStopCollection;
collections[1].Offset = collections[0].Offset = progress / 100;
}
else //如果本身不是线性渐变色则将背景色修改为线性渐变色
{
LinearGradientBrush linearGradientBrush = new LinearGradientBrush();
//设置一个横向的线
linearGradientBrush.StartPoint = new Point(0, 0.5);
linearGradientBrush.EndPoint = new Point(1, 0.5);
GradientStop gradientStop = new GradientStop(); //右边的颜色,即按钮设置的上传时背景色
gradientStop.Color = btn!.UploadingColor;
GradientStop gradientStop1 = new GradientStop();//左边的颜色,即按钮原本的颜色
gradientStop1.Color = (btn!.Background as SolidColorBrush)!.Color;
gradientStop.Offset = gradientStop1.Offset = progress / 100;
linearGradientBrush.GradientStops.Add(gradientStop1);
linearGradientBrush.GradientStops.Add(gradientStop);
btn.Background = linearGradientBrush;
}
}
}在上传文件的时候，将按钮置为禁用，防止重复点击。写一个IsUploadingProperty属性的值变化的回调。
private static void OnIsUploadingChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var btn = d as MyProgressButton;
if ((bool)e.NewValue)
{
btn!.IsEnabled = false;
}
else
{
btn!.IsEnabled = true;
}
}测试代码
Binding binding = new Binding();
binding.Source = this;
binding.Path = new PropertyPath("Progress");
binding.Mode = BindingMode.OneWay;
upload_btn.SetBinding(MyProgressButton.ProgressProperty, binding);
Binding binding1 = new Binding();
binding1.Source = this;
binding1.Path = new PropertyPath("IsUploading");
binding1.Mode = BindingMode.OneWay;
upload_btn.SetBinding(MyProgressButton.IsUploadingProperty, binding1);private async void upload_btn_Click(object sender, RoutedEventArgs e)
{
IsUploading = true;
try
{
using (FileStream fread = new FileStream("d://d3dcompiler_47.dll", FileMode.Open, FileAccess.Read))
using (FileStream fwrite = new FileStream("d://d3dcompiler_47_copy.dll", FileMode.OpenOrCreate, FileAccess.Write))
{
var allLength = new FileInfo("d://d3dcompiler_47.dll").Length;
long copyedBytes = 0;
while (true)
{
var buffer = ArrayPool<byte>.Shared.Rent(1024 * 10);
try
{
var len = await fread.ReadAsync(buffer, 0, buffer.Length);
if (len > 0)
{
await fwrite.WriteAsync(buffer[..len]);
copyedBytes += len;
Progress = copyedBytes * 100 / allLength;
await Task.Delay(20);
}
else
{
break;
}
}
catch { break; }
finally
{
ArrayPool<byte>.Shared.Return(buffer);
}
}
MessageBox.Show("上传成功");
};
}
finally
{
IsUploading = false;
}
}到此这篇关于WPF自定义实现上传文件显示进度的按钮控件的文章就介绍到这了,更多相关WPF自定义控件内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！