如何更新Linq到SQL dbml文件?

我如何更新一个Linq到SQL .dbml文件?

当前回答

要更新你的.dbml-diagram中的表，例如，添加列，这样做:

更新SQL Server资源管理器窗口。将表的“新”版本拖到.dbml-diagram(下图中的report1)中。

在新版本的表中标记添加的列，按Ctrl+C复制添加的列。

单击表的“旧”版本，并按Ctrl+V将添加的列粘贴到已经存在的表版本中。

从步骤2中删除拖拽的表并保存.dbml文件。

2015-09-02 15:16:17

其他回答

下面是对我有效的完整的分步方法，用于更新LINQ to SQL dbml和相关文件，以包括我添加到一个数据库表中的新列。

您需要对您的设计表面进行上述其他建议的更改;但是，您需要执行一些额外的步骤。以下是完整的步骤:

Drag your updated table from Server Explorer onto the design surface Copy the new column from this "new" table to the "old" table (see M463 answer for details on this step) Delete the "new" table that you just dragged over Click and highlight the stored procedure, then delete it Drag the new stored procedure and drop into place. Delete the .designer.vb file in the code-behind of the .dbml (if you do not delete this, your code-behind containing the schema will not update even if you rebuild and the new table field will not be included) Clean and Rebuild the solution (this will rebuild the .designer.vb file to include all the new changes!).

2020-04-28 07:42:05

We use a custom written T4 template that dynamically queries the information_schema model for each table in all of our .DBML files, and then overwrites parts of the .DBML file with fresh schema info from the database. I highly recommend implementing a solution like this - it has saved me oodles of time, and unlike deleting and re-adding your tables to your model you get to keep your associations. With this solution, you'll get compile-time errors when your schema changes. You want to make sure that you're using a version control system though, because diffing is really handy. This is a great solution that works well if you're developing with a DB schema first approach. Of course, I can't share my company's code so you're on your own for writing this yourself. But if you know some Linq-to-XML and can go to school on this project, you can get to where you want to be.

2011-01-28 13:35:36

更新表和更新DBML之间有细微差别…如果对现有表进行了更改，外键关系并不总是立即引入。解决方法是构建项目，然后重新添加表。我向微软报告了这个问题，在VS2010中得到了修复。

DBML显示不显示新的外键约束

请注意，主答案中给出的说明并不清楚。更新表