# System.InvalidOperationException: 属性 'PropertyName' 的值转换器引发了异常。请参阅内部异常了解详细信息。

- **ID:** `dotnet/ef-core-value-conversion-failure`
- **领域:** dotnet
- **类别:** data_error
- **验证级别:** ai_generated
- **修复率:** 88%

## 根因

Entity Framework Core 的值转换器在查询或保存期间失败，因为 CLR 类型和数据库类型之间的转换逻辑不正确或引发了未处理的异常。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| Entity Framework Core 6.0.x | active | — | — |
| Entity Framework Core 7.0.x | active | — | — |
| Entity Framework Core 8.0.x | active | — | — |

## 解决方案

1. ```
   Inspect the inner exception to identify the exact conversion failure (e.g., FormatException, NullReferenceException).
   ```
2. ```
   Implement a robust value converter with null checks and error handling, then register it via HasConversion.
   ```
3. ```
   Use a custom ValueConverter class that logs or handles exceptions gracefully during conversion.
   ```

## 无效尝试

- **** — Removing the value conversion entirely changes data type semantics and may break existing data. (95% 失败率)
- **** — Using a generic ValueConverter without proper null handling causes NullReferenceException. (90% 失败率)
- **** — Changing the database column type without migration leads to data truncation or errors. (85% 失败率)