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我有一个设计表,它链接到链接到DesignAnalysisSoftware查找表的交接表。它是1对多关系。我试图找到更新记录,并添加/删除联结表中的任何记录,而无需触摸查找表。我找到了一种从联结表中删除记录的方法,但在更新刚刚插入联结表的父记录时找不到方法。在更新记录时在交接表中添加记录
我使用的代码如下。
public bool UpdateDesign(Design design){
if (!Validate(design)){
return false;
}
var DesignFromDb = _context.Designs.Single(d => d.StructureId == design.StructureId);
if (DesignFromDb != null){
_context.Entry(DesignFromDb).CurrentValues.SetValues(design);
DesignFromDb.ModifiedDate = DateTime.Now;
DesignFromDb.ModifiedByFullName = base.GetUsersFullName();
DesignFromDb.ModifiedBy = base.GetUserLogin();
DesignFromDb.DesignAnalysisSoftwares.Clear();
DesignFromDb.DesignAnalysisSoftwares = design.DesignAnalysisSoftwares; <- this adds to the junction table but also adds to the lookup table
}
}
?请添加该代码 –