c# - XAML 为转换器类添加命名空间

Question

我一直收到“名称 xxx 在 yyy 中不存在”。我不明白为什么，我想我尝试了所有可能的组合。

我所有的 cs 文件，包括主窗口都在“Web_Media_Seeker_WPF”命名空间中

Converters.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Data;

namespace Web_Media_Seeker_WPF.WPFConverters
{
    public class BoolToValueConverter<T> : IValueConverter
    {
        public T FalseValue { get; set; }
        public T TrueValue { get; set; }

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value == null)
                return FalseValue;
            else
                return (bool)value ? TrueValue : FalseValue;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return value != null ? value.Equals(TrueValue) : false;
        }
    }

    public class BoolToObjectConverter : BoolToValueConverter<Object> { }
    public class BoolToStringConverter : BoolToValueConverter<String> { }
    public class BoolToBrushConverter : BoolToValueConverter<System.Windows.Media.Brush> { }
    public class BoolToVisibilityConverter : BoolToValueConverter<System.Windows.Visibility> { }
    public class BoolToColorConverter : BoolToValueConverter<System.Windows.Media.Color> { }
    public class BoolToImageSourceConverter : BoolToValueConverter<System.Windows.Media.ImageSource> { }
    public class BootToBoolConverter : BoolToValueConverter<bool> { }

        public class AddValueConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            object result = value;
            int Value;

            if (value != null && targetType == typeof(Int32) &&
                int.TryParse((string)parameter,
                System.Globalization.NumberStyles.Integer, culture, out Value))
            {
                result = (int)value + (int)Value;
            }

            return result;
        }

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

MainWindow.xaml

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namesapce:Web_Media_Seeker_WPF.WPFConverters"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d"
        x:Class="Web_Media_Seeker_WPF.MainWindow"
        Title="Web Media Seeker"
        Height="563"
        Width="836">
  <Window.Resources>
    <local:BoolToImageSourceConverter x:Key="BoolToWorkImageSource"
                                      TrueValue="Images/work.png"
                                      FalseValue="Images/idle.png" />
    <local:BootToBoolConverter x:Key="InvertBool"
                               TrueValue="False"
                               FalseValue="True" />
    <local:BoolToStringConverter x:Key="WorkTooltip"
                                 TrueValue="Working..."
                                 FalseValue="Idle" />
  </Window.Resources>
and stuff...

我有错误:

The name "BoolToImageSourceConverter" does not exist in the namespace "clr-namesapce:Web_Media_Seeker_WPF.WPFValuesConverters".

The name "BoolToStringConverter" does not exist in the namespace "clr-namesapce:Web_Media_Seeker_WPF.WPFValuesConverters".

The name "BootToBoolConverter" does not exist in the namespace "clr-namesapce:Web_Media_Seeker_WPF.WPFValuesConverters".

The tag 'BoolToImageSourceConverter' does not exist in XML namespace 'clr-namesapce:Web_Media_Seeker_WPF.WPFValuesConverters'.

The type 'local:BoolToImageSourceConverter' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built.

The type 'local:BoolToStringConverter' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built.

The type 'local:BootToBoolConverter' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built.

Answer 1

您的命名空间声明中存在错误:

xmlns:local="clr-namesapce:Web_Media_Seeker_WPF.WPFConverters"

应该是

xmlns:local="clr-namespace:Web_Media_Seeker_WPF.WPFConverters"

你把 namesapce 而不是 namespace