编码= ASCII;和Encoding = UNICODE;在Npgsql 3连接字符串中不起作用 [英] Encoding=ASCII; and Encoding=UNICODE; do not work in an Npgsql 3 connection string

问题描述

我使用Big SQL安装程序重新安装了PostgreSQL（9.6.1），并使用.msi安装程序重新安装了Npgsql（3.2.0），但是似乎不支持非ASCII字符。 / p>

我的连接字符串为：

 < add name = Northwind  connectionString = Database = Northwind; Server = localhost; Port = 5432; User Id = postgres; Password = 123; Encoding = ASCII; providerName = Npgsql /> 
  

当回读非ASCII字符数据时，我得到如下异常消息：

  System.Text.DecoderFallbackException：无法将索引22处的字节[C3]从指定的代码页转换为Unicode。 
  

我尝试使用 Encoding = UNICODE;

解决方案

您可能使用了旧的Npgsql连接字符串。使用当前（3.2.0）Npgsql访问当前的（）时 Encoding = ASCII 或 Encoding = UNICODE 将不再起作用9.6.1）PostgreSQL。

解决方案：只需完全删除 Encoding = xxx ，一切正常！

您无需修复您的Postgres编码和语言环境，无需尝试查找有效的编码在连接字符串中使用的值； Ngpsql 3只能在没有 Encoding 设置的情况下使用，而与Windows上的默认Postgres安装设置（ Encoding = UTF8 | Collat​​e = English_United Kingdom.1252 | Ctype = English_United Kingdom.1252 ）（适用于英国，但我认为， English_United States.1252 适用于美国及其他地区）。

（请参阅： https：// github .com / npgsql / npgsql / issues / 1396 ）

I have a new install of PostgreSQL (9.6.1) using the Big SQL installer, and a new install of Npgsql (3.2.0) using the .msi installer, but non-ASCII character support seems to be broken.

My connection string is:

<add name="Northwind" connectionString="Database=Northwind;Server=localhost;Port=5432;User Id=postgres;Password=123;Encoding=ASCII;" providerName="Npgsql"/>

I get exception messages like this, when reading back non-ASCII character data:

System.Text.DecoderFallbackException : Unable to translate bytes [C3] at index 22 from specified code page to Unicode.

I have tried using Encoding=UNICODE; instead, but neither works.

解决方案

You probably have an old Npgsql connection string. Encoding=ASCII or Encoding=UNICODE will no longer work when using current (3.2.0) Npgsql to access current (9.6.1) PostgreSQL.

Solution: just remove Encoding=xxx completely and everything works!

You don't need to 'fix' your Postgres encodings and locales, you don't need to try to find a working Encoding value to use in the connection string; Ngpsql 3 just works with no Encoding setting, against the default Postgres install settings on Windows (Encoding=UTF8 | Collate=English_United Kingdom.1252 | Ctype=English_United Kingdom.1252) (for UK, but I believe the same thing applies for English_United States.1252 for US, and other locales).

(See: https://github.com/npgsql/npgsql/issues/1396)

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