How to Bind Save Button's enable state to dataSource ?

Question

User-1965265390 posted

I am trying to figure out how to Bind Save button's enable Property to upshot's dataSource, so that whenever there isa change in dataSource

button(entityState!='unmodified') is enabled  and disabled otherwise.

Answer 1

User-661350001 posted

@if(entityState=='unmodified')

{

button1.Enabled=false;

}

Answer 2

User-661350001 posted

or  

create a Proeprty which will return boolean for example

public bool isUnmodified

{

return entityState=='unmodified';

}

then

bind  isUnmodified  to Enabled property

Answer 3

User-1965265390 posted

I should have been more clear on this.

I am looking to subscribe to EntityState property of DataSource so that whenever there is change in Datasource, i can enable or disbale my button.

Answer 4

User1364817430 posted

Hi,

I think the way to do this is by defining a boolean propertie in your viewmodel of the entity. For example

function ViewModel(data){
   self.hasChanges = data.isChanged;
}

When you done this, you can simply bind this property to the enable attribute of the save button in your form

<input type="submit" data-bind="enable: hasChanges()" value="save" />

Hope this will help.

Greetings Kristof