C# 如何在LINQ中将数据塑造为分组项

我从数据库中得到以下结构：

[
    {
        "databaseId": 1,
        "databaseName": "Database1",
        "schemaName": "someschema",
        "schemaOwner": "dbo"
    },
    {
        "databaseId": 1,
        "databaseName": "Database1",
        "schemaName": "dbo",
        "schemaOwner": "dbo"
    },
    {
        "databaseId": 2,
        "databaseName": "Database2",
        "schemaName": "dbo",
        "schemaOwner": "dbo"
    }
]

我想把它们塑造成以下几个方面：

[
    {
        "databaseName": "Database1",
        "databaseId" 1,
        "schemas": [
            {
                "schemaName": "someschema",
                "schemaOwner": "dbo"
            },
            {
                "schemaName": "dbo",
                "schemaOwner": "dbo"
            }
        ]
    },
    {
        "databaseName": "Database2",
        "databaseId" 2,
        "schemas": [
            {
                "schemaName": "dbo",
                "schemaOwner": "dbo"
            }
        ]
    }
]

      var schemasGrouped = schemas.GroupBy(s => s.DatabaseName)
      .Select(g => new {DatabaseName = g.Key, Schemas = g.ToList()})
      .ToList();

到目前为止，我已经尝试了以下方法：

[
    {
        "databaseName": "Database1",
        "databaseId" 1,
        "schemas": [
            {
                "schemaName": "someschema",
                "schemaOwner": "dbo"
            },
            {
                "schemaName": "dbo",
                "schemaOwner": "dbo"
            }
        ]
    },
    {
        "databaseName": "Database2",
        "databaseId" 2,
        "schemas": [
            {
                "schemaName": "dbo",
                "schemaOwner": "dbo"
            }
        ]
    }
]

      var schemasGrouped = schemas.GroupBy(s => s.DatabaseName)
      .Select(g => new {DatabaseName = g.Key, Schemas = g.ToList()})
      .ToList();

---

但这并不能满足我的要求，因为它没有在父文档中列出数据库Id，它还列出了子文档中的所有属性，即使我只需要SchemaName和SchemaOwner。

您可以尝试添加元素选择器

Func

以重载，并在组键中使用两个字段

var schemasGrouped=schemas
.GroupBy（s=>s.DatabaseName，s.DatabaseId}，s=>new{s.schemaName，s.schemaOwner}）
.Select（g=>new{DatabaseName=g.Key.DatabaseName，DatabaseId=g.Key.DatabaseId，Schemas=g.ToList（）}）
.ToList（）；

您可以尝试将元素选择器

Func

添加到重载中，也可以使用组键中的两个字段

var schemasGrouped=schemas
.GroupBy（s=>s.DatabaseName，s.DatabaseId}，s=>new{s.schemaName，s.schemaOwner}）
.Select（g=>new{DatabaseName=g.Key.DatabaseName，DatabaseId=g.Key.DatabaseId，Schemas=g.ToList（）}）
.ToList（）；