WPF base64（WPF Image 控件調用Base64字符串圖片）

此圖片為Base64字符串，如何做到的呢？以下內容將介紹實現步驟；

1、創建Base64字符串轉換器：

public class Base64ToImage : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var base64String = (String)value;
        if (string.IsNullOrEmpty(base64String))
            return null;
        byte[] bytes = System.Convert.FromBase64String(base64String);

        System.IO.MemoryStream ms = new System.IO.MemoryStream(bytes);
        ImageSourceConverter imageSourceConverter = new ImageSourceConverter();
        ImageSource source = null;
        source = (ImageSource)imageSourceConverter.ConvertFrom(ms);

        return source;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

2、XML導入引用：

xmlns:System="clr-namespace:System;assembly=mscorlib"

3、創建資源

<Window.Resources>
    <System:String x:Key="Base64String">圖片Base64</System:String>
    <local:Base64ToImage x:Key="Base64ToImage"/>
</Window.Resources>

 4、創建控件

<Image Height="64" Width="64" Source="{Binding Source={StaticResource Base64String},Converter={StaticResource Base64ToImage}}"/>

 WPF調用Base64圖片到此結束，以下為圖片與字符串轉換輔助內容；

字符串與 Base64 轉換

1、將圖片數據轉換為Base64字符串

/// <summary>
/// 將圖片數據轉換為Base64字符串
/// </summary>
public static string ToBase64(Image img)
{
    BinaryFormatter binFormatter = new BinaryFormatter();
    MemoryStream memStream = new MemoryStream();
    binFormatter.Serialize(memStream, img);
    byte[] bytes = memStream.GetBuffer();
    return Convert.ToBase64String(bytes);
}

2、將Base64字符串轉換為圖片

/// <summary>
/// 將Base64字符串轉換為圖片
/// </summary>
public static Image ToImage(string base64)
{
    byte[] bytes = Convert.FromBase64String(base64);
    MemoryStream memStream = new MemoryStream(bytes);
    BinaryFormatter binFormatter = new BinaryFormatter();
    return (Image)binFormatter.Deserialize(memStream);
}