BindingSource从datagridview更新,但ObjectContext不从绑定源刷新 [英] BindingSource is updated from datagridview but ObjectContext is not refreshed from the binding source

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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 i in 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;

< span style ="font-size:x-small">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IT屋!

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