protected override bool TryParseValueFromString(string?value, out TEnum result, out string validationErrorMessage)
{
// Let's Blazor convert the value for us 😊
if (BindConverter.TryConvertTo(value, CultureInfo.CurrentCulture, out TEnum parsedValue))
{
result = parsedValue;
validationErrorMessage = "";
return(true);
}
// Map null/empty value to null if the bound object is nullable
if (string.IsNullOrEmpty(value))
{
var nullableType = Nullable.GetUnderlyingType(typeof(TEnum));
if (nullableType != null)
{
result = default;
validationErrorMessage = "";
return(true);
}
}
// The value is invalid => set the error message
result = default;
validationErrorMessage = $"The {FieldIdentifier.FieldName} field is not valid.";
return(false);
}
/// <summary>
/// 将 字符串 Value 属性转化为 泛型 Value 方法
/// </summary>
/// <param name="value"></param>
/// <param name="result"></param>
/// <param name="validationErrorMessage"></param>
/// <returns></returns>
protected override bool TryParseValueFromString(string value, out TItem result, out string?validationErrorMessage)
{
if (typeof(TItem) == typeof(string))
{
result = (TItem)(object)value;
validationErrorMessage = null;
return(true);
}
else if (typeof(TItem).IsEnum)
{
var success = BindConverter.TryConvertTo <TItem>(value, CultureInfo.CurrentCulture, out var parsedValue);
if (success)
{
result = parsedValue;
validationErrorMessage = null;
return(true);
}
else
{
#nullable disable
result = default;
#nullable restore
if (FieldIdentifier != null)
{
validationErrorMessage = $"The {FieldIdentifier.Value.FieldName} field is not valid.";
return(false);
}
else
{
validationErrorMessage = null;
return(true);
}
}
protected void OnInput(ChangeEventArgs args, int index = 0)
{
if (index != 0)
{
throw new ArgumentOutOfRangeException("DatePicker should have only single picker.");
}
if (args == null)
{
return;
}
if (BindConverter.TryConvertTo(args.Value.ToString(), CultureInfo, out TValue changeValue))
{
if (Picker == DatePickerType.Date)
{
if (IsDateStringFullDate(args.Value.ToString()))
{
CurrentValue = changeValue;
}
}
else
{
CurrentValue = changeValue;
}
GetIfNotNull(changeValue, (notNullValue) =>
{
PickerValues[0] = notNullValue;
});
StateHasChanged();
}
UpdateCurrentValueAsString();
}
protected override bool TryParseValueFromString(string value, out string result, out string validationErrorMessage)
{
if (string.IsNullOrWhiteSpace(value))
{
if (DefaultToEmptyString)
{
result = string.Empty;
}
else
{
result = default;
}
validationErrorMessage = null;
return(true);
}
var success = BindConverter.TryConvertTo <string>(
value, CultureInfo.CurrentCulture, out var parsedValue);
if (success)
{
result = parsedValue;
validationErrorMessage = null;
return(true);
}
else
{
result = default;
validationErrorMessage = $"{FieldIdentifier.FieldName} field isn't valid.";
return(false);
}
}
/// <summary>
/// Method is called via EventCallBack if the keyboard key is no longer pressed inside the Input element.
/// </summary>
/// <param name="e">Contains the key (combination) which was pressed inside the Input element</param>
protected async Task OnKeyUp(KeyboardEventArgs e)
{
if (e == null)
{
throw new ArgumentNullException(nameof(e));
}
var key = e.Key.ToUpperInvariant();
if (key == "ENTER")
{
if (string.IsNullOrWhiteSpace(_inputStart.Value))
{
ClearValue();
}
else
{
if (BindConverter.TryConvertTo(_inputStart.Value, CultureInfo, out TValue changeValue))
{
Value = changeValue;
}
Close();
}
}
if (key == "ARROWDOWN" && !_dropDown.IsOverlayShow())
{
await _dropDown.Show();
}
if (key == "ARROWUP" && _dropDown.IsOverlayShow())
{
Close();
}
}
/// <summary>
/// 将 字符串 Value 属性转化为 泛型 Value 方法
/// </summary>
/// <param name="value"></param>
/// <param name="result"></param>
/// <param name="validationErrorMessage"></param>
/// <returns></returns>
protected override bool TryParseValueFromString(string?value, [MaybeNullWhen(false)] out TItem result, [NotNullWhen(false)] out string?validationErrorMessage)
{
if (!string.IsNullOrEmpty(value) && typeof(TItem) == typeof(string))
{
result = (TItem)(object)value;
validationErrorMessage = null;
return(true);
}
else if (typeof(TItem).IsEnum)
{
var success = BindConverter.TryConvertTo <TItem>(value, CultureInfo.CurrentCulture, out var parsedValue);
if (success)
{
result = parsedValue !;
validationErrorMessage = null;
return(true);
}
else
{
result = default;
validationErrorMessage = $"The {FieldIdentifier.FieldName} field is not valid.";
return(false);
}
}
else if (typeof(TItem).IsValueType)
{
result = (TItem)Convert.ChangeType(value, typeof(TItem)) !;
validationErrorMessage = null;
return(true);
}
throw new InvalidOperationException($"{GetType()} does not support the type '{typeof(TItem)}'.");
}
public override void ChangeValue(DateTime value, int index = 0)
{
bool result = BindConverter.TryConvertTo <TValue>(
value.ToString(CultureInfo), CultureInfo, out var dateTime);
if (result)
{
Value = dateTime;
}
_pickerStatus[index]._hadSelectValue = true;
UpdateCurrentValueAsString();
if (IsRange && !IsShowTime && Picker != DatePickerType.Time)
{
if (_pickerStatus[0]._hadSelectValue && _pickerStatus[1]._hadSelectValue)
{
Close();
}
}
else if (!IsShowTime && Picker != DatePickerType.Time)
{
Close();
}
if (OnChange.HasDelegate)
{
OnChange.InvokeAsync(new DateTimeChangedEventArgs
{
Date = value,
DateString = GetInputValue(index)
});
}
}
/// <inheritdoc />
/// <summary>
/// Override Method.
/// Handles constraint checking - min/max and decimal places if enabled
/// </summary>
protected override bool TryParseValueFromString(string value, out TValue result, out string validationErrorMessage)
{
if (BindConverter.TryConvertTo <TValue>(value, CultureInfo.InvariantCulture, out result))
{
if (this.ApplyConstraints)
{
validationErrorMessage = null;
if (this.CheckValueAgainstConstraints(result))
{
return(true);
}
else
{
validationErrorMessage = $"The {FieldIdentifier.FieldName} entered value is not within the constraints {this.MinValue} and {this.MaxValue}";
return(false);
}
}
validationErrorMessage = null;
return(true);
}
else
{
validationErrorMessage = string.Format(ParsingErrorMessage, FieldIdentifier.FieldName);
return(false);
}
}
public override void ChangeValue(DateTime value, int index = 0)
{
if (index != 0)
{
throw new ArgumentOutOfRangeException("DatePicker should have only single picker.");
}
UseDefaultPickerValue[0] = false;
bool result = BindConverter.TryConvertTo <TValue>(
value.ToString(CultureInfo), CultureInfo, out var dateTime);
if (result)
{
CurrentValue = dateTime;
}
_pickerStatus[0]._hadSelectValue = true;
if (!IsShowTime && Picker != DatePickerType.Time)
{
Close();
}
if (OnChange.HasDelegate)
{
OnChange.InvokeAsync(new DateTimeChangedEventArgs
{
Date = value,
DateString = GetInputValue(0)
});
}
}
protected override bool TryParseValueFromString(string value, out TEnum result, out string validationErrorMessage)
{
// convert for Blazor component
if (BindConverter.TryConvertTo(value, CultureInfo.CurrentCulture, out TEnum parsedValue))
{
result = parsedValue;
validationErrorMessage = null;
return(true);
}
// nullable mapping
if (string.IsNullOrEmpty(value))
{
var nullableType = Nullable.GetUnderlyingType(typeof(TEnum));
if (nullableType != null)
{
result = default;
validationErrorMessage = null;
return(true);
}
}
// error
result = default;
validationErrorMessage = $"The {FieldIdentifier.FieldName} field is not valid.";
return(false);
}
/// <inheritdoc />
protected override bool TryParseValueFromString(string value, out TValue result, out string validationErrorMessage)
{
if (typeof(TValue) == typeof(string))
{
result = (TValue)(object)value;
validationErrorMessage = null;
return(true);
}
else if (typeof(TValue).IsEnum || (_nullableUnderlyingType != null && _nullableUnderlyingType.IsEnum))
{
var success = BindConverter.TryConvertTo <TValue>(value, CultureInfo.CurrentCulture, out var parsedValue);
if (success)
{
result = parsedValue;
validationErrorMessage = null;
return(true);
}
else
{
result = default;
validationErrorMessage = $"The {FieldIdentifier.FieldName} field is not valid.";
return(false);
}
}
throw new InvalidOperationException($"{GetType()} does not support the type '{typeof(TValue)}'.");
}
protected override bool TryParseValueFromString(string?value, [MaybeNullWhen(false)] out TEnum result, [NotNullWhen(false)] out string?validationErrorMessage)
{
if (BindConverter.TryConvertTo(value, CultureInfo.CurrentCulture, out result))
{
validationErrorMessage = null;
return(true);
}
if (string.IsNullOrEmpty(value))
{
var nullable = Nullable.GetUnderlyingType(typeof(TEnum));
if (nullable is not null)
{
result = default;
validationErrorMessage = null;
#pragma warning disable CS8762 // Parameter must have a non-null value when exiting in some condition.
// Value is nullable in this instance.
return(true);
#pragma warning restore CS8762 // Parameter must have a non-null value when exiting in some condition.
}
}
result = default;
validationErrorMessage = $"Value is not an enum of type {GetValueType().Item1.Name}";
return(false);
}
protected override bool TryParseValueFromString(string value, out T result, out string validationErrorMessage)
{
if (typeof(T) == typeof(string))
{
result = (T)(object)value;
validationErrorMessage = null;
return(true);
}
if (typeof(T).IsEnum || this.NullableUnderlyingType != null && this.NullableUnderlyingType.IsEnum)
{
var success = BindConverter.TryConvertTo <T>(value, CultureInfo.CurrentCulture, out var parsedValue);
if (success)
{
result = parsedValue;
validationErrorMessage = null;
return(true);
}
else
{
throw new InvalidOperationException($"{this.GetType()} does not support the value '{value}'.");
}
}
throw new InvalidOperationException($"{this.GetType()} does not support the type '{typeof(T)}'.");
}
public override void ChangeValue(DateTime value, int index = 0)
{
bool result = BindConverter.TryConvertTo <TValue>(
value.ToString(CultureInfo), CultureInfo, out var dateTime);
if (result)
{
Value[index] = dateTime;
}
_pickerStatus[index]._hadSelectValue = true;
UpdateCurrentValueAsString(index);
if (IsRange && !IsShowTime && Picker != DatePickerType.Time)
{
if (_pickerStatus[0]._hadSelectValue && _pickerStatus[1]._hadSelectValue)
{
Close();
}
}
else if (!IsShowTime && Picker != DatePickerType.Time)
{
Close();
}
}
protected void OnInput(ChangeEventArgs args, int index = 0)
{
if (args == null)
{
return;
}
var array = Value as Array;
if (BindConverter.TryConvertTo(args.Value.ToString(), CultureInfo, out DateTime changeValue))
{
if (Picker == DatePickerType.Date)
{
if (IsDateStringFullDate(args.Value.ToString()))
{
array.SetValue(changeValue, index);
}
}
else
{
array.SetValue(changeValue, index);
}
ChangePickerValue(changeValue, index);
StateHasChanged();
}
UpdateCurrentValueAsString();
}
public static bool TryParseSelectableValueFromString <[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.All)] TValue>(
this InputBase <TValue> input, string?value,
[MaybeNullWhen(false)] out TValue result,
[NotNullWhen(false)] out string?validationErrorMessage)
{
try
{
if (BindConverter.TryConvertTo <TValue>(value, CultureInfo.CurrentCulture, out var parsedValue))
{
result = parsedValue;
validationErrorMessage = null;
return(true);
}
else
{
result = default;
validationErrorMessage = $"The {input.DisplayName ?? input.FieldIdentifier.FieldName} field is not valid.";
return(false);
}
}
catch (InvalidOperationException ex)
{
throw new InvalidOperationException($"{input.GetType()} does not support the type '{typeof(TValue)}'.", ex);
}
}
public static bool SetRealValue <TValue>(this string str, out TValue value)
{
value = default(TValue);
var otype = typeof(TValue);
var type = Nullable.GetUnderlyingType(otype) ?? otype;
if (string.IsNullOrEmpty(str) && otype != typeof(string))
{
if (otype != type)
{
return(true);
}
else
{
return(false);
}
}
if (type == typeof(bool))
{
if (str.Equals("true", StringComparison.OrdinalIgnoreCase))
{
value = (TValue)(object)true;
return(true);
}
else if (str.Equals("false", StringComparison.OrdinalIgnoreCase))
{
value = (TValue)(object)false;
return(true);
}
else
{
return(false);
}
}
//好奇怪，TryConvertTo<DateTimeOffset> 不行,估计是个bug
if (type == typeof(DateTimeOffset))
{
if (BindConverter.TryConvertToDateTimeOffset(str, CultureInfo.InvariantCulture, out DateTimeOffset val))
{
value = (TValue)(object)val;
return(true);
}
return(false);
}
else
{
if (BindConverter.TryConvertTo <TValue>(str, CultureInfo.InvariantCulture, out TValue val))
{
value = val;
return(true);
}
return(false);
}
}
public void TryConvertTo_NullableGuid_ValidEmptyOrNull(string incomingValue)
{
// Act
var successfullyConverted = BindConverter.TryConvertTo <Guid?>(incomingValue, CultureInfo.CurrentCulture, out var actual);
// Assert
Assert.True(successfullyConverted);
Assert.Null(actual);
}
public void TryConvertTo_Guid_Invalid(string incomingValue)
{
// Act
var successfullyConverted = BindConverter.TryConvertTo <Guid>(incomingValue, CultureInfo.CurrentCulture, out var actual);
// Assert
Assert.False(successfullyConverted);
Assert.Equal(Guid.Empty, actual);
}
public static T ConvertTo <T>(object obj, T defaultValue)
{
if (BindConverter.TryConvertTo <T>(obj, CultureInfo.CurrentCulture, out var convertedValue))
{
return(convertedValue);
}
return(defaultValue);
}
/// <summary>
/// 尝试转换指定值为字符串。
/// </summary>
/// <param name="value">输入控件的值。</param>
/// <param name="result">转换后的值。</param>
/// <param name="validationErrorMessage">转换失败时的错误字符串。</param>
/// <returns>转换成功返回 <c>true</c>；否则返回 <c>false</c>。</returns>
protected override bool TryParseValueFromString(string value, out TValue result, out string validationErrorMessage)
{
if (BindConverter.TryConvertTo(value, CultureInfo.InvariantCulture, out result))
{
validationErrorMessage = null;
return(true);
}
validationErrorMessage = string.Format(ParsingErrorMessage, FieldIdentifier.FieldName);
return(false);
}
/// <summary>
/// 入力値をバインド項目値の型に変換します。
/// </summary>
/// <param name="value">入力値。</param>
/// <param name="result">返却値。</param>
/// <returns>
/// 入力値をバインド項目値の型に変換し、変換に成功した場合は <c>true</c> 。変換に失敗した場合は <c>false</c> を返却します。
/// </returns>
protected override bool TryParseValueFromString(string value, out TValue result)
{
if (BindConverter.TryConvertTo <TValue>(value, CultureInfo.InvariantCulture, out result) == true)
{
}
else
{
result = default;
}
return(true);
}
protected override void OnParametersSet()
{
if (FormatValueAsString(ComputedValue) != currentValueAsString)
//if (!ComputedValue.Equals(currentValue))
{
if (BindConverter.TryConvertTo <TValue>(FormatValueAsString(ComputedValue), CultureInfo.CurrentCulture, out var result))
{
currentValue = result;
ValueChanged.InvokeAsync(result);
}
}
}
public void TryConvertTo_NullableGuid__Invalid()
{
// Arrange
var value = "invalidguid";
// Act
var successfullyConverted = BindConverter.TryConvertTo <Guid?>(value, CultureInfo.CurrentCulture, out var actual);
// Assert
Assert.False(successfullyConverted);
Assert.Null(actual);
}
/// <inheritdoc />
protected override bool TryParseValueFromString(string?value, [MaybeNullWhen(false)] out TValue result, [NotNullWhen(false)] out string?validationErrorMessage)
{
if (BindConverter.TryConvertTo <TValue>(value, CultureInfo.InvariantCulture, out result))
{
validationErrorMessage = null;
return(true);
}
else
{
validationErrorMessage = string.Format(CultureInfo.InvariantCulture, ParsingErrorMessage, DisplayName ?? FieldIdentifier.FieldName);
return(false);
}
}
protected override bool TryParseValueFromString(string value, out TEnum result, out string validationErrorMessage)
{
if (BindConverter.TryConvertTo(value, CultureInfo.CurrentCulture, out TEnum parsedValue))
{
result = parsedValue;
validationErrorMessage = null;
return(true);
}
result = default;
validationErrorMessage = $"The {FieldIdentifier.FieldName} field is not valid.";
return(false);
}
public void TryConvertTo_NullableGuid_Valid()
{
// Arrange
var expected = Guid.NewGuid();
var incomingValue = expected.ToString();
// Act
var successfullyConverted = BindConverter.TryConvertTo <Guid?>(incomingValue, CultureInfo.CurrentCulture, out var actual);
// Assert
Assert.True(successfullyConverted);
Assert.Equal(expected, actual.Value);
}
protected override bool TryParseValueFromString(string value, [System.Diagnostics.CodeAnalysis.MaybeNullWhen(false)] out TItem result, [System.Diagnostics.CodeAnalysis.NotNullWhen(false)] out string validationErrorMessage)
{
Console.WriteLine($"TryParseValueFromString {value}");
// Let's Blazor convert the value for us
if (BindConverter.TryConvertTo(value, System.Globalization.CultureInfo.CurrentCulture, out TItem parsedValue))
{
result = parsedValue;
validationErrorMessage = null;
return(true);
}
result = default;
validationErrorMessage = $"The {FieldIdentifier.FieldName} field is not valid.";
return(false);
}
/// <summary>
///
/// </summary>
/// <param name="value"></param>
/// <param name="result"></param>
/// <param name="validationErrorMessage"></param>
/// <returns></returns>
protected override bool TryParseValueFromString(string?value, [MaybeNullWhen(false)] out TValue result, [NotNullWhen(false)] out string?validationErrorMessage)
{
var ret = false;
validationErrorMessage = null;
if (BindConverter.TryConvertTo <TValue>(value, CultureInfo.InvariantCulture, out result))
{
ret = true;
}
else
{
validationErrorMessage = string.Format(CultureInfo.InvariantCulture, ParsingErrorMessage !, DisplayText);
}
return(ret);
}
/// <inheritdoc/>
protected override bool TryParseValueFromString(string value, out T result, out string validationErrorMessage)
{
var success = BindConverter.TryConvertTo <T>(value, CultureInfo.CurrentCulture, out var parsedValue);
if (success)
{
result = parsedValue;
validationErrorMessage = null;
return(true);
}
else
{
result = default;
validationErrorMessage = $"{this.FieldIdentifier.FieldName} field isn't valid.";
return(false);
}
}