Question

在Win7机器上使用C＃我需要在实现EF之前动态更改Entity Framework 6.2 edmx xml文件中的模式类型。我可以为表的“Schema”属性过滤edmx Xml，但不能过滤视图。表使用非前缀属性“Schema”，而Views因某些奇怪的原因使用前缀属性“store：Schema”。

不幸的是，如果我为明显的“store：Schema”过滤属性，我会得到一个XmlException，说“''''字符，十六进制值0x3A，不能包含在名称中。”我已经尝试了各种方法来过滤这个所需的属性，以便我可以将属性更改为我的自定义模式名称，以便我以后可以让EF运行来自另一个模式的视图而不是“dbo”。我的XML代码如下。如何过滤前缀属性的存储后代？

        // How can I specify the schema prefix for an EF edmx <EntitySet> view type?
        // Table <EntitySet> has a non prefixed attribute call "Schema"
        // EF view <EntitySet> has a prefixed attribute called "store:Schema" that I cannot seem to filter for
        // Filtering with "store:Schema" throws an XmlException
        //  - "The ':' character, hexadecimal value 0x3A, cannot be included in a name."
        //
        // Change the schema for all the tables and views from the dbo (or whatever) EF specified schema (if any)
        // to the desired schema.
        foreach (var entitySet in storageXml.Descendants(storageNS + "EntitySet"))
        {
            // this works fine for tables but views have prefixed attribute "store:Schema" so are not found
            var schemaAttribute = entitySet.Attributes("Schema").FirstOrDefault();
            if (schemaAttribute != null)
            {
                schemaAttribute.SetValue(schema);
            }

            // EF storage xml species a prefix on view Schema attribute as "store:Schema" so are not found
            // here we try various ways to get any "store:Scehma" attributes so far unsuccessfully
            // the most obvious incantaion throws an XmlException as mentioned above
            schemaAttribute = entitySet.Attributes("store:Schema").FirstOrDefault();
            // the next three run fine but do not filter out the needed attribute
            //schemaAttribute = entitySet.Attributes(XName.Get("store", "Schema")).FirstOrDefault();
            //schemaAttribute = entitySet.Attributes(XName.Get("Schema", "store")).FirstOrDefault();
            //XNamespace ns = "store";
            //schemaAttribute = entitySet.Attributes(ns + "Schema").FirstOrDefault();
            if (schemaAttribute != null)
            {
                // I never hit this though can see the desired XElement w/ a "store:Schema" attribute
                // I need to reset this schema // does it need to be set as store: prefixed?
                schemaAttribute.SetValue(schema);
            }
        }

Answer 1

更改代码以使用像这样的NameSpace前缀。

            XNamespace store = "http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator";
            schemaAttribute = entitySet.Attributes(store + "Schema").FirstOrDefault();
            if (schemaAttribute != null)
            {
                schemaAttribute.SetValue(schema);
            }

如何为EF edmx <entityset>视图类型？</entityset>指定XElement属性前缀

1 个答案: