使用 Firebird 2.5 进行 EF Core 编码 [英] EF Core encoding with Firebird 2.5

问题描述

我正在将用 Delphi + FireDac 制作的遗留系统迁移到 C# + EF.由于是遗留系统，已经有很多记录的数据库(Many records without encoding information).

I am migrating a legacy system made in Delphi + FireDac to C# + EF. As it is a legacy system, there is already a database with many records (Many records without encoding information).

当我使用 C# + EF 获取包含特殊字符的记录时，字符显示不正确.

When I get records that contain special characters using C# + EF, the characters are not displayed correctly.

我该如何解决这个问题?

How can I fix this problem?

C#

德尔福

MainWindow.xaml.cs - ButtonClick

private void Button_Click(object sender, RoutedEventArgs e)
{
    string appPath = AppContext.BaseDirectory;
    string connectionString = $"database=localhost/3050:{appPath}\database\test.fdb;user=sysdba;password=masterkey";          
    using (AppDbContext con = new AppDbContext(connectionString))
    {
        Product p = con.Products.First();
        lblText.Text = p.Name;                
    }
}

AppDbContext.cs

public class AppDbContext : DbContext
{
    private readonly string _connectionString;
    public DbSet<Product> Products { get; set; }

    public AppDbContext(string connectionString)
    {
        _connectionString = connectionString;
    }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        base.OnConfiguring(optionsBuilder);

        optionsBuilder.UseFirebird(_connectionString);
    }
}

Product.cs

[Table("PRODUCTS")]
public class Product
{
    [Column("ID")]
    public int Id { get; set; }
    [Column("NAME")]
    public string Name { get; set; }
}

完整的C#项目代码

推荐答案

对于 firebird，大多数情况下，可以使用 CharSet UTF-8 处理特殊字符问题.在 connectionString 中，您可能需要包含 charset=utf8.

For firebird, most of the times, issues with special characters can be handled with the use of CharSet UTF-8. Within connectionString, you may need to include charset=utf8.

添加更新:

感谢@Felipe Godinho 的反馈，似乎 charset=win1252 被发现是 CharSet 的另一个有价值的选项，在处理在 Firebird 上运行的旧数据库系统时值得尝试.

Thanks to @Felipe Godinho for the feedback, it seems charset=win1252 has been found to be another valuable option of CharSet that is worth to try when handling legacy database system that is running on Firebird.

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