原文:

1. binding 后面的stringFormat的写法----连接字符串

     <TextBlock Text="{Binding Path=Qty, StringFormat=Quantity: \{0\}}" />

 

2.

[ValueConversion(typeof(decimal), typeof(string))]    public class PriceConverter : IValueConverter    {        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)        {            decimal price = (decimal)value;            return price.ToString("c", culture);        }        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)        {            string price = value.ToString();                        decimal result;            if (Decimal.TryParse(price, System.Globalization.NumberStyles.Any, culture, out result))            {                return result;            }            return value;        }    }

用法  你懂的

 

 

3.条件式的值转换器

public class PriceToBackgroundConverter : IValueConverter    {        public decimal MinimumPriceToHighlight        {            get;            set;        }        public Brush HighlightBrush        {            get;            set;        }        public Brush DefaultBrush        {            get;            set;        }        public object Convert(object value, Type targetType, object parameter,          System.Globalization.CultureInfo culture)        {            decimal price = (decimal)value;            if (price >= MinimumPriceToHighlight)                return HighlightBrush;            else                return DefaultBrush;        }        public object ConvertBack(object value, Type targetType, object parameter,          System.Globalization.CultureInfo culture)        {            throw new NotSupportedException();        }    }

用法

先引入命名空间

然后在需要转换器的窗体中定义资源

用资源

 

例如 这是一个图片地址转成图片资源的一个转换器

public class ImagePathConverter : IValueConverter    {        private string imageDirectory = Directory.GetCurrentDirectory();        public string ImageDirectory        {            get { return imageDirectory; }            set { imageDirectory = value; }        }        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)        {            string imagePath = Path.Combine(ImageDirectory, (string)value);            return new BitmapImage(new Uri(imagePath));         }        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)        {            throw new NotSupportedException("The method or operation is not implemented.");        }    }

引入命名空间 ，定义资源

用资源

 

4. 多值转换器

public class ValueInStockConverter : IMultiValueConverter    {        public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)        {            // Return the total value of all the items in stock.            decimal unitCost = (decimal)values[0];            int unitsInStock = (int)values[1];            return unitCost * unitsInStock;        }        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)        {            throw new NotSupportedException();        }    }

5.含参数的转换器，前台页面上的一个例子的写法

                                  
                                       
                                            
                                                 
              
               m
                                              
                                         
                                    
                               
          

本例sys是先引入    命名空间的

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

 

6.其他stringFormat

 例如

  <TextBlock Text="{Binding Date,StringFormat={}{0:MM/dd/yyyy}}" />

  还有很多简单的 字母直接表示的

     <TextBlock Text="{Binding UnitCost,StringFormat=The Value is {0：C}." />   内置的转换货币的转换器  例如：还有 E，P，F？等

    还有1些时间的内置转换器，太多了，不想写了

   有 d,D,f,F,s,M,G

 

分类: ,

+加关注

1

0

上一篇：

下一篇：