Using AngularJS to modify a record

I am currently developing a web application using C# with angularjs. Within my app, I have multiple records that I need to update. I have set up the necessary web service and included the required JS files for updating these records. My main concern is figuring out how to display the previous values in the textbox and dropdownlist.

<input type="text" ng-model="uvenuename" ng-init="uvenuename='{{updateparam.VenueName}}'" value="{{updateparam.VenueName}}" style="margin-left: 5%;" placeholder="Venue Name" text="" height="30" />

<input type="text" ng-model="uvenueadd" ng-init="uvenueadd='{{updateparam.Venueadd}}'" value="{{updateparam.Venueadd}}" style="margin-left: 5%;" placeholder="Venue Address" text="" height="30" />

I attempted the above setup, but encountered an issue where if I only wanted to change a single textbox (such as the venue name) and update the record, the venue address would display '{{updateparam.Venueadd}}' and the dropdownlist would show blank spaces.

<select ng-model="ulocation">
   <option ng-repeat="k in blocation" value="{{k.jlocation}}">
        {{k.jlocation}}
   </option>
</select>

This is the dropdownlist structure. How can I resolve these issues?

Answer №1

To maintain the binding between your view and variables in AngularJS, it is recommended to use ng-model instead of ng-init and value. Ensure that you are not using a primitive data type for ng-model for effective double binding.

<input type="text" ng-model="data.uvenuename" style="margin-left: 5%;" placeholder="Venue Name" text="" height="30" />

<input type="text" ng-model="data.uvenueadd" style="margin-left: 5%;" placeholder="Venue Address" text="" height="30" />

Apply the same approach to select elements as well:

<select ng-model="data.ulocation">
   <option ng-repeat="k in blocation" value="{{k.jlocation}}">
      {{k.jlocation}}
   </option>
</select>

In the select tag, the variable data.ulocation will be updated with the value specified in the option tag's attribute value.

The data variable structure should resemble the following:

$scope.data = {
    uvenuename: "",
    uvenueadd: "",
    ulocation: ""
}

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