class ValidationBindableBase : BindableBase, IDataErrorInfo
{
public string this[string columnName]
{
get
{
if (_errorMap.ContainsKey(columnName))
{
var error = _errorMap[columnName];
_errorMap.Remove(columnName);
return error;
}
return null;
}
}
public string Error => string.Join("\n",_errorMap.Values);
private readonly Dictionary<string, string> _errorMap = new Dictionary<string, string>();
protected override bool SetProperty<T>(ref T storage, T value, [CallerMemberName]string propertyName = null)
{
var result = base.SetProperty(ref storage, value, propertyName);
var type = this.GetType();
foreach (var methodInfo in type.GetMethods())
{
if (methodInfo.Name == propertyName + "Validation"&& methodInfo.ReturnType == typeof(string) && methodInfo.GetParameters().Length == 0)
{
_errorMap.Add(propertyName,(string)methodInfo.Invoke(this, null));
}
}
return result;
}
}
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