本文介绍了BindingSource从datagridview更新,但ObjectContext不从绑定源刷新的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 有人可以帮我解决这个问题吗。Can someone please help me with this issue.我的BindingSource是通过 填充的((IList  bindingsource是根据用户在datagridview中所做的更改而更新的)不会从绑定源刷新/更新ObjectContext。因此,对BindContext.SaveChanges()的调用会对数据库执行无效。My BindingSource is populated via ((IList the bindingsource is updated from changes made by the user in the datagridview but the ObjectContext is not refreshed/updated from the binding source.  So a call to BindContext.SaveChanges() does nothing to the DB. aspnetAppThemeUserSettingBindingSourceRegisteredApps.DataSource =((aspnetAppThemeUserSettingBindingSourceRegisteredApps.DataSource = (( IListSource )results).GetList(); 此"结果"是 IQueryable IQueryable  < AspnetAppThemeUserSetting > GetMyRegisteredApplicationsList()   //列表< AspnetAppThemeUserSetting>结果; BindContext = BindContext = new ASP_OWNEREntities ( GlobalSettings 。GET_ASPUDS_EntityConnectionString ()); var   results = 来自 i in BindContext.AspnetAppThemeUserSettings.Include( " AspnetApplicationThemeGroup" ) results = from iin BindContext.AspnetAppThemeUserSettings.Include("AspnetApplicationThemeGroup") .Include(  " AspnetApplicationTheme" ) "AspnetApplicationTheme")。包括(  " AspnetApplication" ) "AspnetApplication")。包括(  " AspnetUser" ) "AspnetUser")    其中 i.AspnetUser.UserName == " 3001497" where i.AspnetUser.UserName =="3001497"    where i.AspnetApplication.AspnetMemberships.Where(oo => oo.IsApproved == 1 && oo.IsLockedOut == 0).Count()> 0 where i.AspnetApplication.AspnetMemberships.Where(oo => oo.IsApproved == 1 && oo.IsLockedOut == 0).Count() > 0     //执行(System.Data.Objects.MergeOption.AppendOnly); // Objects.Mer.Merge // orderby i.AspnetApplication.ApplicationName   选择 i; select i;    返回 结果; 当bindingsource从我的BindContext对象获取其数据时,该对象没有using语句,并且BindContext被声明为form wide。  datagridview将呈现所有行详细信息然后,我对datagrid进行更改,这些更改很好地反映在我的bindingsource中,但是当我调用BindContext.SaveChanges()时,BindContext不会对数据库进行更新。当我看到调试中的BindContext我可以看到旧值仍然没有对绑定上下文进行任何更改。 请帮忙。 {  推荐答案 您是否看到引发的任何异常?Do you see any exception raised?检查上下文的ObjectStateManager以查看新实例是否已存在。Check the context's ObjectStateManager to see if a new instance does not already exist.希望这会有所帮助。 这篇关于BindingSource从datagridview更新,但ObjectContext不从绑定源刷新的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!
10-20 02:58