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关于WPF使用MultiConverter控制Button状态的详细介绍
需求描述1.按钮的状态需要根据多个数据源的内容作出不同的组合判断2.每个数据源的判断规则可定制注：以下功能感觉只是简单粗暴的实现，如果您了解更优雅的解决方案，烦请告诉我下，感谢先！
按钮XAML复制代码 代码如下: MultiConverter判断复制代码 代码如下:public class InvalidMultiValidationRuleToBooleanMultiConverter : IMultiValueConverter { #region IMultiValueConverter Members
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture) { string[] paramlist = ((string)parameter).Split('|'); if (paramlist == null || paramlist.Length <= 0) { throw new ArgumentNullException("parameter"); } int length = paramlist.Length;
IList boollist = new List();
for (int i = 0; i < paramlist.Length; i++) { switch (paramlist[i].ToLowerInvariant()) { case "checknameexisted": boollist.Add(ValidationRuleHelper.Validate(values[i])); break; case "directoryandfileexist": boollist.Add(ValidationRuleHelper.Validate(values[i])); break; case "greaterthanzerointeger": boollist.Add(ValidationRuleHelper.Validate(values[i])); break; case "numericnull": boollist.Add(ValidationRuleHelper.Validate(values[i])); break; case "stringlength": boollist.Add(ValidationRuleHelper.Validate(values[i])); break; case "stringnullorempty": boollist.Add(ValidationRuleHelper.Validate(values[i])); break; case "ipaddress": boollist.Add(ValidationRuleHelper.Validate(values[i])); break; case "objectnull": default: boollist.Add(ValidationRuleHelper.Validate(values[i])); break; } }
bool result = boollist[0]; for (int i = 1; i < boollist.Count; i++) { result = result & boollist[i]; }
return result; }
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture) { return null; }
#endregion }