74 lines
2.3 KiB
C#
74 lines
2.3 KiB
C#
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using UIShare.UIViewModel;
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using System;
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using System.Globalization;
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using System.Linq;
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using System.Windows.Data;
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namespace UIShare.Converters
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{
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public class FilteredParametersConverter : IMultiValueConverter
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{
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public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
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{
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if (values.Length < 2 || values[0] == null || values[1] == null)
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return null;
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Type currentParamType = values[0] as Type;
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var allParameters = values[1] as System.Collections.IEnumerable;
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if (currentParamType == null || allParameters == null)
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return allParameters;
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// 过滤出类型匹配的参数
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return allParameters.Cast<ParameterVM>()
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.Where(p => IsTypeMatch(currentParamType, p.Type))
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.ToList();
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}
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private bool IsTypeMatch(Type currentType, Type candidateType)
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{
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if (candidateType == null) return false;
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// 如果候选参数类型是 object，则匹配所有类型
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if (candidateType == typeof(object)) return true;
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// 如果类型完全相同，则匹配
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if (candidateType == currentType) return true;
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// 处理数值类型的兼容性
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if (IsNumericType(currentType) && IsNumericType(candidateType))
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return true;
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return false;
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}
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private bool IsNumericType(Type type)
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{
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if (type == null) return false;
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switch (Type.GetTypeCode(type))
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{
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case TypeCode.Byte:
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case TypeCode.SByte:
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case TypeCode.UInt16:
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case TypeCode.UInt32:
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case TypeCode.UInt64:
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case TypeCode.Int16:
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case TypeCode.Int32:
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case TypeCode.Int64:
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case TypeCode.Decimal:
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case TypeCode.Double:
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case TypeCode.Single:
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return true;
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default:
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return false;
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}
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}
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public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
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{
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throw new NotImplementedException();
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}
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}
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} |