Im creating an app that shows a rss that has several types of messages (alert, warning1, warning2). All of the types has a png (same as the message). They are all placed in the Images folder in my project.
So in my application I bind to a list of newsobjects. The newsobject has the string Type
(alert, warning1, warning2).
But how can I bind the source of a image to the correct image based on this Type property?
在这个newsObject类的构造函数中添加switch(Type)
块,并根据Type
值应用不同的图像(我假设在这个类中你有image或path_to_image属性)
You have to use IValueConverter:
For Instance:
public class ImageConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var imagePath = (string) value;
switch (imagePath)
{
case "warning":
return "/Images/warning.png";
case "error":
return "/Images/error.png";
default:
throw new InvalidOperationException();
}
}
}
then in xaml:
<UserControl.Resources>
<converters:ImageConverter x:Key="imageConverter"/>
....
and finaly:
<Image Source="{Binding DataItem.Type,Converter={StaticResource imageConverter}}" />
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