我在网上找到了这段代码here

@typeparam T
@inherits InputNumber<T>


 <input @attributes="AdditionalAttributes"
       type="number"
       class="@CssClass"
       value="@stringValue"
       @oninput="OnInput"
       @onblur="OnBlur" />

@code {
    private string stringValue;
    private T lastParsedValue;

     protected override void OnParametersSet()
     {
        // Only overwrite the "stringValue" when the Value is different
        if (!Equals(CurrentValue, lastParsedValue))
        {
            lastParsedValue = CurrentValue;
            stringValue = CurrentValueAsString;
        }
    }

     private void OnInput(ChangeEventArgs e)
     {
        // Update the value
        CurrentValueAsString = stringValue = (string)e.Value;
        lastParsedValue = CurrentValue;
     }
     private void OnBlur(FocusEventArgs e)
     {
      
        // Overwrite the stringValue property with the parsed value.
        // This call Value.ToString(), so the value in the input is well formatted.
        // note: Ensure the string value is valid before updating the content
        if (!EditContext.GetValidationMessages(FieldIdentifier).Any())
        {
            stringValue = CurrentValueAsString;
        }
    }
}

和

@typeparam T
@inherits InputNumber<T>


 <input @attributes="AdditionalAttributes"
       type="number"
       class="@CssClass"
       value="@stringValue"
       @oninput="OnInput"
       @onblur="OnBlur" />

@code {
    private string stringValue;
    private T lastParsedValue;

     protected override void OnParametersSet()
     {
        // Only overwrite the "stringValue" when the Value is different
        if (!Equals(CurrentValue, lastParsedValue))
        {
            lastParsedValue = CurrentValue;
            stringValue = CurrentValueAsString;
        }
    }

     private void OnInput(ChangeEventArgs e)
     {
        // Update the value
        CurrentValueAsString = stringValue = (string)e.Value;
        lastParsedValue = CurrentValue;
     }
     private void OnBlur(FocusEventArgs e)
     {
      
        // Overwrite the stringValue property with the parsed value.
        // This call Value.ToString(), so the value in the input is well formatted.
        // note: Ensure the string value is valid before updating the content
        if (!EditContext.GetValidationMessages(FieldIdentifier).Any())
        {
            stringValue = CurrentValueAsString;
        }
    }
}

它工作得很好，锁定键盘，只允许数字（“e”字符除外）

我要停止'e'字符和

还有，我想添加一个我尝试使用的“千分隔符”（表示货币）

@typeparam T
@inherits InputNumber<T>


 <input @attributes="AdditionalAttributes"
       type="number"
       class="@CssClass"
       value="@stringValue"
       @oninput="OnInput"
       @onblur="OnBlur" />

@code {
    private string stringValue;
    private T lastParsedValue;

     protected override void OnParametersSet()
     {
        // Only overwrite the "stringValue" when the Value is different
        if (!Equals(CurrentValue, lastParsedValue))
        {
            lastParsedValue = CurrentValue;
            stringValue = CurrentValueAsString;
        }
    }

     private void OnInput(ChangeEventArgs e)
     {
        // Update the value
        CurrentValueAsString = stringValue = (string)e.Value;
        lastParsedValue = CurrentValue;
     }
     private void OnBlur(FocusEventArgs e)
     {
      
        // Overwrite the stringValue property with the parsed value.
        // This call Value.ToString(), so the value in the input is well formatted.
        // note: Ensure the string value is valid before updating the content
        if (!EditContext.GetValidationMessages(FieldIdentifier).Any())
        {
            stringValue = CurrentValueAsString;
        }
    }
}

但它不起作用

顺晟科技：

下面的组件直接继承自。是完成主要工作的地方，几乎肯定需要对我尚未考虑的特定情况和输入进行一些修补。

有关组件中的详细信息，请参阅注释。

组件:

@typeparam T
@inherits InputNumber<T>


 <input @attributes="AdditionalAttributes"
       type="number"
       class="@CssClass"
       value="@stringValue"
       @oninput="OnInput"
       @onblur="OnBlur" />

@code {
    private string stringValue;
    private T lastParsedValue;

     protected override void OnParametersSet()
     {
        // Only overwrite the "stringValue" when the Value is different
        if (!Equals(CurrentValue, lastParsedValue))
        {
            lastParsedValue = CurrentValue;
            stringValue = CurrentValueAsString;
        }
    }

     private void OnInput(ChangeEventArgs e)
     {
        // Update the value
        CurrentValueAsString = stringValue = (string)e.Value;
        lastParsedValue = CurrentValue;
     }
     private void OnBlur(FocusEventArgs e)
     {
      
        // Overwrite the stringValue property with the parsed value.
        // This call Value.ToString(), so the value in the input is well formatted.
        // note: Ensure the string value is valid before updating the content
        if (!EditContext.GetValidationMessages(FieldIdentifier).Any())
        {
            stringValue = CurrentValueAsString;
        }
    }
}

测试页:

@typeparam T
@inherits InputNumber<T>


 <input @attributes="AdditionalAttributes"
       type="number"
       class="@CssClass"
       value="@stringValue"
       @oninput="OnInput"
       @onblur="OnBlur" />

@code {
    private string stringValue;
    private T lastParsedValue;

     protected override void OnParametersSet()
     {
        // Only overwrite the "stringValue" when the Value is different
        if (!Equals(CurrentValue, lastParsedValue))
        {
            lastParsedValue = CurrentValue;
            stringValue = CurrentValueAsString;
        }
    }

     private void OnInput(ChangeEventArgs e)
     {
        // Update the value
        CurrentValueAsString = stringValue = (string)e.Value;
        lastParsedValue = CurrentValue;
     }
     private void OnBlur(FocusEventArgs e)
     {
      
        // Overwrite the stringValue property with the parsed value.
        // This call Value.ToString(), so the value in the input is well formatted.
        // note: Ensure the string value is valid before updating the content
        if (!EditContext.GetValidationMessages(FieldIdentifier).Any())
        {
            stringValue = CurrentValueAsString;
        }
    }
}