InvalidOperationException:该属性是对象的关键信息的一部分,无法修改 [英] InvalidOperationException: The property is part of the object's key information and cannot be modified
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问题描述
这是我如何解决这个问题:
1)我需要将此位列添加到现有表中。
ALTER TABLE BooksDB.dbo .Books
添加编辑位NOT NULL DEFAULT(0),
2)更新了我的EF
3)当我尝试更改实体对象的编辑属性时,我从主题行中得到错误。
为什么这样?
EF对象声明:
///< summary>
///没有元数据文档可用。
///< / summary>
[EdmScalarPropertyAttribute(EntityKeyProperty = true,IsNullable = false)]
[DataMemberAttribute()]
public global :: System.Boolean edited
{
get
{
return _edited;
}
set
{
if(_edited!= value)
{
OneditedChanging(value);
ReportPropertyChanging(editing);
_edited = StructuralObject.SetValidValue(value);
ReportPropertyChanged(editing);
OneditedChanged();
}
}
}
private global :: System.Boolean _edited;
partial void OneditedChanging(global :: System.Boolean value);
partial void OneditedChanged();
解决方案
通过向表中添加PRIMARY KEY可以解决此问题。
I'm getting this error when I try to change column value.
Here is how I got to this problem:
1) I was needed to add this bit column to an Existing table.
ALTER TABLE BooksDB.dbo.Books
ADD edited bit NOT NULL DEFAULT(0),
2) Updated my EF model in project.
3) Now when I try to change 'edited' property of entity object, I'm getting the error from Subject line.
Why is that?
EF object declaration:
/// <summary>
/// No Metadata Documentation available.
/// </summary>
[EdmScalarPropertyAttribute(EntityKeyProperty=true, IsNullable=false)]
[DataMemberAttribute()]
public global::System.Boolean edited
{
get
{
return _edited;
}
set
{
if (_edited != value)
{
OneditedChanging(value);
ReportPropertyChanging("edited");
_edited = StructuralObject.SetValidValue(value);
ReportPropertyChanged("edited");
OneditedChanged();
}
}
}
private global::System.Boolean _edited;
partial void OneditedChanging(global::System.Boolean value);
partial void OneditedChanged();
解决方案
This problem solved by adding PRIMARY KEY to the table.
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