forms

问题 I use template driven and am trying to initialize my form using patchValue and it is not working. I can make it work if I use two-way binding to set values [(fooBar)] or even setTimeout but I was just wondering, is there a way to make it work with just patchValue? https://stackblitz.com/edit/angular-fft2c5 Thank you. 回答1: It doesn't work because at the time of calling patchValue method there are no any controls registered in your form yet . Why? That's because Template-driven forms are

问题 I ran into some peculiar behavior while using VBA Forms in Excel. I have a module which invokes a Modeless form, which serves as a hub to call other forms. The other forms are invoked as Modal. The problem is, as soon as the the child form is hidden or unloaded, the parent Modeless form gets closed as well. I tried to find an answer to this, but even though there are questions that exist along these lines, none of them provided an answer that works. After a bit of testing, I determined any

问题 I have models for Project and Ethic in my Rails 4 app. The ethics view has a nested fields form (using simple form simple fields for) contained in it. The ethic form fields are nested in the projects form. The ethic form fields has 2 select menus. The first menu offers a set of options for a category. The 2nd select option is a list of subcategories. I'm trying to figure out how to populate the 2nd select menu with the right options, based on the choice made in the 1st select menu. In my

问题 I have models for Project and Ethic in my Rails 4 app. The ethics view has a nested fields form (using simple form simple fields for) contained in it. The ethic form fields are nested in the projects form. The ethic form fields has 2 select menus. The first menu offers a set of options for a category. The 2nd select option is a list of subcategories. I'm trying to figure out how to populate the 2nd select menu with the right options, based on the choice made in the 1st select menu. In my

问题 I have a simple form for creating an article: Title,image,category,body , etc.. My problem is with the image input. Selecting a new one and submitting everything works fine: the image is being uploaded to the server the title of the image is being saved to db and i can print it in the article. By editing the whole form, filling all fields but leaving the image field as it is, and finally submitting, the image field value in db is changing to nothing. How can i configure the php file, so every

问题 I have a very simple Class Based View: In views.py: class IncidentEdit(UpdateView): model=Incident fields = visible_field_list sucess_url = '/status' works fine as-is. I have associated CreateView , DeleteView , etc. I can create edit and delete records. Now to fine-tune the project, I need to add field validation. My question : Where do I put basic validation code when I have based the view on the 'model=' rather than 'form=' ? I could change everything to use form based views, but the whole

问题 It's posible to validate request with rules for additional fields, or remove that fields from request? Simple example, I have FormRequest object with rules: public function rules() { return [ 'id' => 'required|integer', 'company_name' => 'required|max:255', ]; } And when I get post request with any other fields I want to get error/exception in controller or I want to get only id and company_name fields, with no any others. It's exist any feature in laravel with that, or I must make it in my

问题 I wrote a component that is supposed to list out a bunch of checkboxes with corresponding textfields. When you click on the checkboxes, or type in the fields it's meant to update state. The textbox is working ok, but when I type in the fields, it updates state ok, but I lose focus whenever I tap the keyboard. I realized this is probably due to not having keys set, so I added keys to everything but it still is losing focus. At one point I tried adding in stopPropegation on my events because I

问题 I wrote a component that is supposed to list out a bunch of checkboxes with corresponding textfields. When you click on the checkboxes, or type in the fields it's meant to update state. The textbox is working ok, but when I type in the fields, it updates state ok, but I lose focus whenever I tap the keyboard. I realized this is probably due to not having keys set, so I added keys to everything but it still is losing focus. At one point I tried adding in stopPropegation on my events because I

问题 The Windows Forms have Size and ClientSize Properties. Windows Forms also have a MinimumSize property that lets you set the smallest allowed size of the form. I am looking for a way to set the minimum ClientSize of a form. I'm new to c# and I am unsure of the best way to do this. It occurred to me that I could use the Form.SizeChanged event to check and restrict the form size but this seemed messy and I am looking for another way of doing it. Note: If the form border size is changed I want