MaterialDesign Or ComboBox 联动查询
<ComboBox Width="200" Height="30" x:Name="ComboxName" Text="{Binding CboxText,Mode=TwoWay}" ItemsSource="{Binding TenantsModel}" SelectedItem="{Binding Model}" DisplayMemberPath="name" IsEditable="True" materialDesign:HintAssist.Hint="{Binding QueryNmae}" > <i:Interaction.Triggers> <i:EventTrigger EventName="SelectionChanged"> <i:InvokeCommandAction Command="{Binding QueryTenantsCommand}" CommandParameter="{Binding ElementName=ComboxName}"/> </i:EventTrigger> </i:Interaction.Triggers> </ComboBox>
后台代码
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
public class GetTenants { public string tenancyName { get; set; } public string name { get; set; } public string editionDisplayName { get; set; } public string connectionString { get; set; } public string isActive { get; set; } public string creationTime { get; set; } public string subscriptionEndDateUtc { get; set; } public string editionId { get; set; } public string isInTrialPeriod { get; set; } public string id { get; set; } } public class MainViewModel : ViewModelBase { private ObservableCollection<GetTenants> _TenantsModel; public ObservableCollection<GetTenants> TenantsModel { get { return _TenantsModel; } set { _TenantsModel = value;RaisePropertyChanged(); } } private string userName = string.Empty; private string passWord = string.Empty; public static string Token = string.Empty; public string Password { get { return passWord; } set { passWord = value; RaisePropertyChanged(); } } public string UserName { get { return userName; } set { userName = value; RaisePropertyChanged(); } } private GetTenants _Model; public GetTenants Model { get { return _Model; } set { _Model = value;RaisePropertyChanged(); } } private string _CboxText; public string CboxText { get { return _CboxText; } set { _CboxText = value;RaisePropertyChanged(); QueryTenantsList(value); } } private string _QueryNmae; public string QueryNmae { get { return _QueryNmae; } set { _QueryNmae = value; RaisePropertyChanged(); } } public RelayCommand<object> QueryTenantsCommand { get; set; } public RelayCommand Close { get; set; } public RelayCommand Logasync { get; private set; } public MainViewModel() { QueryTenantsCommand = new RelayCommand<object>((o) => SelectModel(o)); TenantsModel = new ObservableCollection<GetTenants>(); Close = new RelayCommand(()=> ApplicationShutdown()); Logasync = new RelayCommand(()=>LogCommand()); } private async void LogCommand() { if (string.IsNullOrEmpty(UserName) && string.IsNullOrEmpty(Password)) return; JObject jObjects = new JObject(); jObjects["userNameOrEmailAddress"] = UserName; jObjects["password"] = Password; var LoginTask = QueryOrUpdateHttp.LoginAsync("http://47.106.71.73:5000/api/TokenAuth/Authenticate", jObjects); var timeouttask = Task.Delay(3000); var completedTask = await Task.WhenAny(LoginTask, timeouttask); if (completedTask == timeouttask) return; var jObject = JObject.Parse(LoginTask.Result.ToString()); if (string.IsNullOrEmpty(jObject.ToString()) || !string.IsNullOrEmpty(jObject["error"].ToString())) return; Token = jObject["result"]["accessToken"].ToString(); if (string.IsNullOrEmpty(Token)) return; } public void ApplicationShutdown() { Messenger.Default.Send("", "ApplicationShutdown"); } private void SelectModel(object o) { GetTenants combo = (o as ComboBox).SelectedItem as GetTenants; if (combo == null) return; QueryNmae = combo.name.Trim(); } public static ObservableCollection<T> DeserializeJsonToList<T>(string json) where T : class { JsonSerializer serializer = new JsonSerializer(); using (StringReader sr = new StringReader(json)) { object o = serializer.Deserialize(new JsonTextReader(sr), typeof(ObservableCollection<T>)); ObservableCollection<T> list = o as ObservableCollection<T>; return list; } } private async void QueryTenantsList(string value) { if (string.IsNullOrEmpty(value)) return; GetTenants loadValue = new GetTenants() { id="1", name="正在加载...."}; TenantsModel.Add( loadValue); string result = await QueryOrUpdateHttp.GetTenantId("/api/services/app/Tenant/GetTenants?Filter=" + CboxText); var JResult = JObject.Parse(result); if (bool.Parse(JResult["success"].ToString())) { var results = JResult["result"]["items"].ToString(); TenantsModel.Clear(); TenantsModel = DeserializeJsonToList<GetTenants>(results); } else { MessageBox.Show("没有改公司名称"); } } }