dotnet data_error ai_generated true

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。

System.InvalidOperationException: The value converter for property 'PropertyName' threw an exception. See inner exception for details.

ID: dotnet/ef-core-value-conversion-failure

其他格式: JSON · Markdown 中文 · English
88%修复率
84%置信度
1证据数
2023-11-01首次发现

版本兼容性

版本状态引入弃用备注
Entity Framework Core 6.0.x active — — —
Entity Framework Core 7.0.x active — — —
Entity Framework Core 8.0.x active — — —

根因分析

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。

English

Entity Framework Core's value converter fails during query or save because the conversion logic between CLR type and database type is incorrect or throws an unhandled exception.

generic

官方文档

https://learn.microsoft.com/en-us/ef/core/modeling/value-conversions?view=efcore-8.0

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

常见但无效的做法:

  1. 95% 失败

    Removing the value conversion entirely changes data type semantics and may break existing data.

  2. 90% 失败

    Using a generic ValueConverter without proper null handling causes NullReferenceException.

  3. 85% 失败

    Changing the database column type without migration leads to data truncation or errors.