方法一：在快速监视中查看db.entry(entity).getvalidationresult() public class newsdal { public static news add(news entity) { using (cmscontext db = new cmscontext()) { news news = new news(); try { news = db.news.add(entity); db.savechanges
方法一：在快速监视中查看db.entry(entity).getvalidationresult()
public class newsdal { public static news add(news entity) { using (cmscontext db = new cmscontext()) { news news = new news(); try { news = db.news.add(entity); db.savechanges(); } catch (exception ex) { throw new exception(ex.message); } return news; } } }
快速监视中查看：db.entry(entity).getvalidationresult()
方法二：直接catch (dbentityvalidationexception ex) 前提先引用：using system.data.entity.validation;
public class newsdal { public static news add(news entity) { using (cmscontext db = new cmscontext()) { news news = new news(); try { news = db.news.add(entity); db.savechanges(); } //catch (exception ex) catch (dbentityvalidationexception ex) { throw new exception(ex.message); } return news; } } }