WPF自定義實(shí)現(xiàn)上傳文件顯示進(jìn)度的按鈕控件

更新時(shí)間：2023年06月12日 09:35:32 作者：BruceNeter

自定義控件在WPF開發(fā)中是很常見的，有時(shí)候某些控件需要契合業(yè)務(wù)或者美化統(tǒng)一樣式，這時(shí)候就需要對控件做出一些改造，本文就來自定義實(shí)現(xiàn)一個(gè)上傳文件顯示進(jìn)度的按鈕控件吧

按鈕設(shè)置圓角

因?yàn)榘粹o本身沒有CornerRadius屬性，所以只能重寫B(tài)utton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>

在按鈕的模板中加入一個(gè)Border即可，但是按鈕本身沒有CornerRadius屬性，就沒辦法使用TemplateBinding ，只能寫死在樣式，那肯定不行，所以我們就需要拓展一下Button按鈕。

1.創(chuàng)建一個(gè)類MyProgressButton繼承Button類，由于是新創(chuàng)建的一個(gè)類，所以我們可以直接使用依賴屬性來完成這件事，在MyProgressButton中定義一個(gè)圓角弧度的依賴屬性。

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.創(chuàng)建一個(gè)ProgressButtonStyle.xaml的資源文件，針對MyProgressButton定義一些樣式，包括弧度的綁定和鼠標(biāo)移入移出的陰影效果，讓我們的按鈕立體起來

<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.最后在主界面將MyProgressButton的命名控件加入進(jìn)來,并且用xaml創(chuàng)建一個(gè)MyProgressButton按鈕，自定義一些屬性，并且將ProgressButtonStyle.xaml樣式加入到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="上傳文件" 
                                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:

按鈕上傳文件相關(guān)定義

1.定義按鈕類型MyProgressButton的文件上傳進(jìn)度，是否上傳，以及上傳時(shí)按鈕背景色三個(gè)依賴屬性

/// <summary>
        /// 文件上傳進(jìn)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>
        /// 文件是否上傳
        /// </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>
        /// 上傳時(shí)按鈕背景色
        /// </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.如何實(shí)現(xiàn)按鈕內(nèi)部的進(jìn)度顯示？有幾種辦法，比如使用漸進(jìn)色修改偏移，或者按鈕內(nèi)部套一個(gè)進(jìn)度條，或者按鈕內(nèi)部放兩個(gè)不同顏色的塊控件，動態(tài)修改兩者的長度。我們選擇第一種。

在Progress屬性被修改的時(shí)候，我們動態(tài)修改下按鈕內(nèi)部漸進(jìn)色的偏移。為ProgressProperty添加值變化的回調(diào)。

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) //如果按鈕本身是線性漸變色則直接修改偏移
                {
                    GradientStopCollection collections =
                        brush.GetValue(GradientBrush.GradientStopsProperty) as GradientStopCollection;
                    collections[1].Offset = collections[0].Offset = progress / 100;
                }
                else //如果本身不是線性漸變色則將背景色修改為線性漸變色
                {
                    LinearGradientBrush linearGradientBrush = new LinearGradientBrush();
                    //設(shè)置一個(gè)橫向的線
                    linearGradientBrush.StartPoint = new Point(0, 0.5);
                    linearGradientBrush.EndPoint = new Point(1, 0.5);
                    GradientStop gradientStop = new GradientStop(); //右邊的顏色,即按鈕設(shè)置的上傳時(shí)背景色
                    gradientStop.Color = btn!.UploadingColor;
                    GradientStop gradientStop1 = new GradientStop();//左邊的顏色,即按鈕原本的顏色
                    gradientStop1.Color = (btn!.Background as SolidColorBrush)!.Color;
                    gradientStop.Offset = gradientStop1.Offset = progress / 100;
                    linearGradientBrush.GradientStops.Add(gradientStop1);
                    linearGradientBrush.GradientStops.Add(gradientStop);
                    btn.Background = linearGradientBrush;
                }
            }
        }

在上傳文件的時(shí)候，將按鈕置為禁用，防止重復(fù)點(diǎn)擊。寫一個(gè)IsUploadingProperty屬性的值變化的回調(diào)。

private static void OnIsUploadingChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var btn = d as MyProgressButton;
            if ((bool)e.NewValue)
            {
                btn!.IsEnabled = false;
            }
            else
            {
                btn!.IsEnabled = true;
            }
        }

測試代碼

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("上傳成功");
                };
            }
            finally
            {
                IsUploading = false;
            }
        }

到此這篇關(guān)于WPF自定義實(shí)現(xiàn)上傳文件顯示進(jìn)度的按鈕控件的文章就介紹到這了,更多相關(guān)WPF自定義控件內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！

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