我以前遇到过这个问题.此错误意味着您正在尝试将值显式分配给数据库自动分配的列.

I have run into this before. This error means you are trying to assign a value explicitly to a column where the database automatically assigns it.

建议:更新您的 edmx 文件以反映您可能在数据库中所做的任何更改.如果数据库自动分配值，您应该在设计器文件中的该属性下看到IsDbGenerated=true"属性.如果没有，您可以手动添加.

Suggestion: Update your edmx file to reflect any changes you may have made in the database. If the database automatically assigns the value, you should see the "IsDbGenerated=true" attribute in your designer file under that property. If it's not there, you can add it manually.