如何将一个图片的网络地址保存为本地图片

寂寞豆腐 2012-07-12 10:48:36

rt
还有就是如何将提供一个服务器文件路径，把文件下载到本地，并删除服务器文件

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jv9 2012-07-14

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[Quote=引用 5 楼的回复:]
引用 3 楼的回复:
可以利用WebClient下载网络图片，例如：

XML code

<UserControl x:Class="SilverlightApplication1.WebClientDownload"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http……
[/Quote]

private void btnDownload_Click(object sender, RoutedEventArgs e)
{
//檔案放在ClientBin的上層
wc.OpenReadAsync(new Uri("../YY.jpg", UriKind.Relative));
}

寂寞豆腐 2012-07-13

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[Quote=引用 3 楼的回复:]
可以利用WebClient下载网络图片，例如：

XML code

<UserControl x:Class="SilverlightApplication1.WebClientDownload"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://s……
[/Quote]

我是想要把它保存到本地的盘符。如保存为jpg格式。这样的。不是显示在页面上。

寂寞豆腐 2012-07-13

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jv9 2012-07-13

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可以利用WebClient下载网络图片，例如：



<UserControl x:Class="SilverlightApplication1.WebClientDownload"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 

    Width="400" Height="300" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc=

"http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d">

    <Grid x:Name="LayoutRoot" Background="White">

      <Grid.RowDefinitions>

        <RowDefinition Height="0.09*"/>

        <RowDefinition Height="0.17*"/>

        <RowDefinition Height="0.74*"/>

      </Grid.RowDefinitions>

        <Canvas Canvas.Top="70" Grid.RowSpan="3">

            <Rectangle x:Name="progressRectangle" Canvas.Left="96" Height="10" Width="0" Fill="Maroon" Canvas.Top="42" />

            <Rectangle Canvas.Top ="42" Canvas.Left="96" Height="10" Width="200" StrokeThickness="1" Stroke="Black" />

            <TextBlock x:Name="progressText" Canvas.Top="36.545" Canvas.Left="302" Text="0%" FontSize="12" />

        </Canvas>

        <Button HorizontalAlignment="Left" Margin="23,8,0,16" Width="67" Grid.Row="1" Content="Download" 

x:Name="btnDownload" Click="btnDownload_Click"/>

        <Image Margin="8.5,8.5,8,8" Grid.Row="2" x:Name="img"/>

    </Grid>

</UserControl>



using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;

using System.Windows.Media.Imaging;

using System.Windows.Resources;



namespace SilverlightApplication1

{

    public partial class WebClientDownload : UserControl

    {

        WebClient wc = null;



        public WebClientDownload()

        {

            InitializeComponent();



            wc = new WebClient();



            wc.DownloadProgressChanged += new DownloadProgressChangedEventHandler(wc_DownloadProgressChanged);

            wc.OpenReadCompleted += new OpenReadCompletedEventHandler(wc_OpenReadCompleted);

        }



        //進度

        void wc_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)

        {

            progressText.Text = e.ProgressPercentage.ToString();

            progressRectangle.Width = (double)e.ProgressPercentage*2;

        }



        //下載完成,載入圖片

        void wc_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)

        {

            if (e.Error != null) { return; }

            BitmapImage bi = new BitmapImage();

            bi.SetSource(e.Result);

            img.Source = bi;



        }



        private void btnDownload_Click(object sender, RoutedEventArgs e)

        {

            //檔案放在ClientBin的上層

            wc.OpenReadAsync(new Uri("../YY.jpg", UriKind.Relative));

        }

    }

}