/// <summary>
/// Validate the provided value in accordance with the attribute's
/// policy.
/// </summary>
/// <param name="context">Context for validation.</param>
/// <param name="value">The value to validate.</param>
/// <param name="reason">On failure, receives a user-readable string
/// message explaining why the value is not valid.</param>
/// <returns>True if the value passes validation; false otherwise.
/// </returns>
public override bool TryValidate(ArgumentValidationContext context, object value, out string reason)
{
if (!string.IsNullOrEmpty(GetString(value)))
{
reason = null;
return(true);
}
reason = Strings.StringIsEmpty;
return(false);
}
/// <summary>
/// Validate the provided value in accordance with the attribute's
/// policy.
/// </summary>
/// <param name="context">Context for validation.</param>
/// <param name="value">The value to validate.</param>
/// <param name="reason">On failure, receives a user-readable string
/// message explaining why the value is not valid.</param>
/// <returns>True if the value passes validation; false otherwise.
/// </returns>
public override bool TryValidate(ArgumentValidationContext context, object value, out string reason)
{
if (GetArgumentType(value).IsGreaterThanOrEqualTo(value, Target))
{
reason = null;
return(true);
}
reason = string.Format(CultureInfo.CurrentCulture, Strings.ValueIsNotGreaterThanOrEqualTo, Target);
return(false);
}
/// <summary>
/// Validate the provided value in accordance with the attribute's
/// policy.
/// </summary>
/// <param name="context">Context for validation.</param>
/// <param name="value">The value to validate.</param>
/// <param name="reason">On failure, receives a user-readable string
/// message explaining why the value is not valid.</param>
/// <returns>True if the value passes validation; false otherwise.
/// </returns>
public override bool TryValidate(ArgumentValidationContext context, object value, out string reason)
{
if (!Value.Equals(value))
{
reason = null;
return true;
}
reason = string.Format(CultureInfo.CurrentCulture, Strings.ValueMayNotBe, Value);
return false;
}
/// <summary>
/// Validate the provided value in accordance with the attribute's
/// policy.
/// </summary>
/// <param name="context">Context for validation.</param>
/// <param name="value">The value to validate.</param>
/// <param name="reason">On failure, receives a user-readable string
/// message explaining why the value is not valid.</param>
/// <returns>True if the value passes validation; false otherwise.
/// </returns>
/// <exception cref="ArgumentNullException">Thrown when <paramref name="context"/>
/// is null.</exception>
public override bool TryValidate(ArgumentValidationContext context, object value, out string reason)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
var path = (value as FileSystemPath) ?? (string)value;
var exists = false;
if (Exists.HasFlag(PathExists.AsFile))
{
exists = exists || context.FileSystemReader.FileExists(path);
}
if (Exists.HasFlag(PathExists.AsDirectory))
{
exists = exists || context.FileSystemReader.DirectoryExists(path);
}
if (exists)
{
reason = null;
return(true);
}
string reasonMessage;
switch (Exists)
{
case PathExists.AsFile:
reasonMessage = Strings.FileDoesNotExist;
break;
case PathExists.AsDirectory:
reasonMessage = Strings.DirectoryDoesNotExist;
break;
case PathExists.AsFileOrDirectory:
default:
reasonMessage = Strings.PathDoesNotExist;
break;
}
reason = string.Format(CultureInfo.CurrentCulture, reasonMessage);
return(false);
}
/// <summary>
/// Validate the provided value in accordance with the attribute's
/// policy.
/// </summary>
/// <param name="context">Context for validation.</param>
/// <param name="value">The value to validate.</param>
/// <param name="reason">On failure, receives a user-readable string
/// message explaining why the value is not valid.</param>
/// <returns>True if the value passes validation; false otherwise.
/// </returns>
/// <exception cref="ArgumentNullException">Thrown when <paramref name="context"/>
/// is null.</exception>
public override bool TryValidate(ArgumentValidationContext context, object value, out string reason)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
var path = (FileSystemPath)value;
if (!context.FileSystemReader.FileExists(path) && !context.FileSystemReader.DirectoryExists(path))
{
reason = null;
return(true);
}
reason = string.Format(CultureInfo.CurrentCulture, Strings.PathExists);
return(false);
}
/// <summary> /// Validate the provided value in accordance with the attribute's /// policy. /// </summary> /// <param name="context">Context for validation.</param> /// <param name="value">The value to validate.</param> /// <param name="reason">On failure, receives a user-readable string /// message explaining why the value is not valid.</param> /// <returns>True if the value passes validation; false otherwise. /// </returns> public abstract bool TryValidate(ArgumentValidationContext context, object value, out string reason);