Asp.net mvc 删除重复项

在我的Ng网格单元中，我应用了此单元模板。我正在获取数据，但具有重复的regionName

<select ng-cell-input
    ng-options="l.RegionID as l.RegionName for l in regionActivities"
    ng-class="'colt' + $index" ng-model="COL_FIELD" ng-input='COL_FIELD' ng-change="activityRegionChange(row)" ng-show='!isRoomRequestInProgress'></select>

{{COL_FIELD}}

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有什么方法可以防止重复吗？

您需要做的是构建或重用

<select ng-cell-input
ng-options="l.RegionID as l.RegionName for l in regionActivities | unique:'RegionName'"
ng-class="'colt' + $index" ng-model="COL_FIELD" ng-input='COL_FIELD' ng-change="activityRegionChange(row)" ng-show='!isRoomRequestInProgress'></select>