Implementation method of loading and assigning initial value to ComboBox in Extjs_extjs

For example:

Copy code The code is as follows:

editCityStore.load({ params: { provinceID: proid });
Ext.getCmp('city-id-name').setValue(cityid);

Since the store is loaded asynchronously, it will assign the value first and then fill in the value To ComboBox, you need to use here:

Assign value after loading is complete:

Copy code Code As follows:

editCityStore.load({

params: { provinceID: proid },

callback: function () {
//Waiting for data to load The value is assigned only after completion, otherwise due to asynchronous operation, the value will be assigned first and then loaded.
Ext.getCmp('city-id-name').setValue(cityid);
},
scope: editCityStore,/ /Indicates the scope
add: false //false means the data is not accumulated
});