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DataGridColumn with Header '*' already exists in the Columns collection of a DataGrid

由 余生颓废 提交于 2021-02-20 05:48:28
问题 I have a WPF application with MVVM pattern. In one of my view, I have to bind an ObservableCollection to view. In that view, I have one ListBox and one DataGrid both bind to the same ObservableCollection but doing different things like events, style etc.. I need only one of these controls displayed at a time and what I did is created two user controls, one for DataGrid and other for ListBox . And I switched between them by placing a ContentControl on the main view(something similar to this

SQL Error: ORA-00913: too many values

由 只谈情不闲聊 提交于 2021-02-20 05:48:05
问题 Two tables are identical in terms of table name, column names, datatype and size. These tables are located in separate databases, but I am use to current Log in in hr user. insert into abc.employees select * from employees where employee_id=100; I can not give use original query from corporate office. Error starting at line 1 in command: insert into abc.employees select * from employees where employee_id=100; Error at Command Line:1 Column:25 Error report: SQL Error: ORA-00913: too many

How to specify language of website? (HTML?)

由 房东的猫 提交于 2021-02-20 05:47:47
问题 How do I specify that a page is in a certain language so search engines can understand? Is it a meta tag I put at the top? If it is, do you know if most of the search engines use this to determine language? I have converted 1 page of content in english to several different languages, and would like to include that information in the html/let the search engines know which language they are dealing with. 回答1: Quick google search gave me this: HTTP and meta for language. tl;dr <html lang="en">

Dependency Injection in .NET Core 3.0 for WPF

由 梦想的初衷 提交于 2021-02-20 05:45:22
问题 I’m quite familiar with ASP.NET Core and the support for dependency injection out of the box. Controllers can require dependencies by adding a parameter in their constructor. How can dependencies be achieved in WPF UserControls? I tried adding a parameter to the constructor, but that didn’t work. I love the IOC concept and would prefer to bring this forward to WPF. 回答1: I have recently come across this requirement to my project and I solved it this way. For Dependency Injection in .NET Core 3

Dependency Injection in .NET Core 3.0 for WPF

由 怎甘沉沦 提交于 2021-02-20 05:45:10
问题 I’m quite familiar with ASP.NET Core and the support for dependency injection out of the box. Controllers can require dependencies by adding a parameter in their constructor. How can dependencies be achieved in WPF UserControls? I tried adding a parameter to the constructor, but that didn’t work. I love the IOC concept and would prefer to bring this forward to WPF. 回答1: I have recently come across this requirement to my project and I solved it this way. For Dependency Injection in .NET Core 3

Can't change activations in existing Keras model

由 梦想与她 提交于 2021-02-20 05:44:10
问题 I have a normal VGG16 model with relu activations, i.e. def VGG_16(weights_path=None): model = Sequential() model.add(ZeroPadding2D((1, 1),input_shape=(3, 224, 224))) model.add(Convolution2D(64, 3, 3, activation='relu')) model.add(ZeroPadding2D((1, 1))) model.add(Convolution2D(64, 3, 3, activation='relu')) model.add(MaxPooling2D((2, 2), strides=(2, 2))) [...] model.add(Flatten()) model.add(Dense(4096, activation='relu')) model.add(Dropout(0.5)) model.add(Dense(4096, activation='relu')) model

How to import external library and cast it to <any> in Typescript?

由 情到浓时终转凉″ 提交于 2021-02-20 05:41:26
问题 TypeScript was giving me a compile error that I didn't know how to fix when trying to use a React component I defined: import App = require('./components/views/app/app'); That error went away when I used the import module as <any> : import App = require('./components/views/app/app'); const App2 = App as any; Is there any way to do this in one line, like so? import App = require('./components/views/app/app') as <any>; It would be a great way to import JavaScript files too, without having to do

Get superclass name in ES6

由 耗尽温柔 提交于 2021-02-20 05:40:28
问题 I have a class, and another class that extends that class. class Shape { constructor() { return this; } } class Circle extends Shape { constructor() { super(); return this; } } let foo = new Circle(); I can get foo's class with let className = foo.constructor.name // returns string 'Circle' Is it possible to get the name of foo's superclass ('Shape') in a similar manner? 回答1: Object.getPrototypeOf(Object.getPrototypeOf(foo)).constructor.name; 回答2: Got it: let superClassName = foo.__proto__._

Updated firebase dependency and got duplicated protobuf classes error

由 送分小仙女□ 提交于 2021-02-20 05:39:29
问题 I'm getting this error after updating one of my firebase SDKs FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':app:checkDebugDuplicateClasses'. > 1 exception was raised by workers: java.lang.RuntimeException: Duplicate class com.google.protobuf.AbstractMessageLite found in modules jetified-protobuf-javalite-3.11.0.jar (com.google.protobuf:protobuf-javalite:3.11.0) and jetified-protobuf-lite-3.0.1.jar (com.google.protobuf:protobuf-lite:3.0.1) Duplicate

Is EntityState.Modified required for an update?

由 前提是你 提交于 2021-02-20 05:39:29
问题 I've seen a lot of people when updating a record use: ... ms.Status = status; db.Entry(ms).State = EntityState.Modified; db.SaveChanges(); Is this line required? I was able to do an update without it. db.Entry(ms).State = EntityState.Modified; I was wondering what this statement is actually used for if the context already knows it should update that record without you specifying it explicitly then why bother specifying it explicitly? 回答1: It is required if your changes in the entity was done