Angular 使用当前选定的选项创建IF语句

在我的棱角分明的JS页面上有以下下拉列表:

<div class="col-md-4 fieldMargin">
                        <div class="dropdownIcon">
                            <select name="actions" id="actions"
                                    ng-init="Data.formStatus.Action=Data.Actions[0]"
                                    ng-options="option.Value for option in Data.Actions"
                                    ng-focus="ActionsLabel = true" ng-blur="ActionsLabel = false;"
                                    ng-model="Data.formStatus.Action"
                                  
                           ></select>
                            <label for="actions" class="labelColor"
                                   ng-class="{'dropdownLabelFloat' : (ActionsLabel || Data.formStatus.Action != null), 'dropdownLabel' : !ActionsLabel && !Data.formStatus.Action  }">
                                Action
                            </label>
                        </div>
                    </div>

以下是上述下拉列表的选项:

                    Test1
                    Test12
                    Test14
                    Test18
                    Test25
                    
                    and so on

根据用户在上面的操作下拉列表中所做的任何 Select ，我想要更改同一页上另一个控件的ng模型:

这是另一个控件:

<div class="col-md-12 inputEmailSection">
                            <input type="text" name="to" id="to"
                                   ng-focus="ToLabel = true" ng-blur="ToLabel = false;"
                                   ng-model="Data.EmailInput.To" />
                            <label for="to" class="labelColor"
                                   ng-class="{'inputLabelFloat' : (ToLabel || Data.EmailInput.To!= null), 'inputLabel' : !ToLabel && !Data.EmailInput.To}">
                                To
                            </label>
                        </div>
                    

在操作下拉列表中，如果用户 Select "Test1"，则我希望ng-Model为:

Data.EmailInput.To

但是如果用户从Action下拉列表中 Select "Test18"或"Test25"，那么我希望ng模型为:

Data.EmailInput.ToSpecialCase



 <div class="col-md-12 inputEmailSection">
                            <input type="text" name="to" id="to"
                                   ng-focus="ToLabel = true" ng-blur="ToLabel = false;"
                                   ng-model="Data.EmailInput.ToSpecialCase" />
                            <label for="to" class="labelColor"
                                   ng-class="{'inputLabelFloat' : (ToLabel || Data.EmailInput.To!= null), 'inputLabel' : !ToLabel && !Data.EmailInput.To}">
                                To
                            </label>
                        </div>

我可以在angularJs的HTML页面上做一些事情吗？我试过这样做:

<div ng-if={{Data.formStatus.Action}} = "Test1" >
                           
                      <div class="col-md-12 inputEmailSection">
                            <input type="text" name="to" id="to"
                                   ng-focus="ToLabel = true" ng-blur="ToLabel = false;"
                                   ng-model="Data.EmailInput.To" />
                            <label for="to" class="labelColor"
                                   ng-class="{'inputLabelFloat' : (ToLabel || Data.EmailInput.To!= null), 'inputLabel' : !ToLabel && !Data.EmailInput.To}">
                                To
                            </label>
                        </div>
                </div>
                        
                     <div ng-else-if="Test18" or "Test25">
                                  <div class="col-md-12 inputEmailSection">
                            <input type="text" name="to" id="to"
                                   ng-focus="ToLabel = true" ng-blur="ToLabel = false;"
                                   ng-model="Data.EmailInput.ToSpecialCase" />
                            <label for="to" class="labelColor"
                                   ng-class="{'inputLabelFloat' : (ToLabel || Data.EmailInput.To!= null), 'inputLabel' : !ToLabel && !Data.EmailInput.To}">
                                To
                            </label>
                        </div>

                      </div>

因此，如果用户从下拉列表中 Select "Test1"，那么我想显示:

  <div class="col-md-12 inputEmailSection">
                            <input type="text" name="to" id="to"
                                   ng-focus="ToLabel = true" ng-blur="ToLabel = false;"
                                   ng-model="Data.EmailInput.To" />
                            <label for="to" class="labelColor"
                                   ng-class="{'inputLabelFloat' : (ToLabel || Data.EmailInput.To!= null), 'inputLabel' : !ToLabel && !Data.EmailInput.To}">
                                To
                            </label>
                        </div>
                </div>

否则，如果用户 Select "Test18"或"Test25"，我想要显示:

<div>       
      <div class="col-md-12 inputEmailSection">
                        <input type="text" name="to" id="to"
                               ng-focus="ToLabel = true" ng-blur="ToLabel = false;"
                               ng-model="Data.EmailInput.ToSpecialCase" />
                        <label for="to" class="labelColor"
                               ng-class="{'inputLabelFloat' : (ToLabel || Data.EmailInput.To!= null), 'inputLabel' : !ToLabel && !Data.EmailInput.To}">
                            To
                        </label>
                    </div>

我对angularJs还是个新手.在这方面的任何帮助都将不胜感激.