c# - 一击将ListView ObservableCollection内的所有项目添加到(WPF Mvvm)

Question

我有一个带有两列Devicename和DeviceAddress的列表 View 。我为listview维护了一个observablecollection。我正在使用MVVM模式。

View :

<ListView Height="100" ItemsSource="{Binding I2CDeviceList}" SelectedItem="{Binding SelectedI2CAddress, Mode=TwoWay}" Name="I2cDeviceList">
                <ListView.View>
                    <GridView>
                        <GridViewColumn Header="I2C Device" Width="190" DisplayMemberBinding="{Binding I2CDevName}" />
                        <GridViewColumn Header="I2C Device Address" Width="203" DisplayMemberBinding="{Binding I2CDeviceAddress}" />
                    </GridView>
                </ListView.View>
</ListView>

I2CDevicename 和 I2CDeviceAddress 都是我的模型类的一部分。

ViewModel:

public ObservableCollection<ModelClass> I2CDeviceList
    {
        get { return _I2CDeviceList; }
        set
        {
            _I2CDeviceList = value;
            NotifyPropertyChanged("I2CDeviceList");
        }
    }

分别在DeviceName和DeviceAddress中添加的项目为:

{ T("Other"), T("0x00")},
{ T("TI Codec(TLV320AIC3104)"), T("0x18")},
{ T("Chip ID GPIO(PCA9500)"),T("0x20")},
{ T("GPIO - power rail control(PCA9555DB)"),T("0x24")},
{ T("Digital Potentiometer(AD5252)"),T("0x2C")},
{ T("Audience chip(eSxxx)"),T("0x3E")},
{ T("Spartan 3A FPGA(XC3SD3400A)"),T("0x40")},.......

现在，在viewmodel类的构造函数中，我可以按以下方式在obs.Coll中添加项目:

public ObservableCollection<ModelClass> _I2CDeviceList = new ObservableCollection<ModelClass>()
        {                
            new ModelClass() {I2CDevName = "Other", I2CDeviceAddress= "0x00"},
            new ModelClass() {I2CDevName = "TI Codec", I2CDeviceAddress = "0x18"},  .........             
        };

但是添加15个项目是一项繁琐的工作，而我最终只有15个项目。我是否可以使用单个循环添加项目以避免很多语句？

Answer 1

因此，您可以为ModelClass构造一个构造函数，从而使创建起来更容易，并同时填写值。

public class ModelClass
{
    public string I2CDevName { get; set; }
    public string I2CDeviceAddress { get; set; }

    public ModelClass(string DeviceName, string DeviceAddress)
    {
        this.I2CDevName = DeviceName;
        this.I2CDeviceAddress = DeviceAddress;
    }
}

这样可以减少一些代码，但是仍然会有一些输入:

public ObservableCollection<ModelClass> _I2CDeviceList = new ObservableCollection<ModelClass>()
{                
    new ModelClass("Other","0x00"),
    new ModelClass("TI Codec", "0x18"), .......
};

或者，您可以在ModelClass中创建一个“factory”(静态)函数，该函数可以接收整个列表并返回整个ObservableCollection

因此，您将必须更改列表中的某些内容，但是如果将其更改为类似的内容(也许有人可以提出更好的想法来更好地使用列表，但是:

List<string[]> list = new List<string[]>() { new string[] {"Other", "0x00"},
                                             new string[] {"Audience chip(eSxxx), "0x3E"}, ... };

然后将静态函数添加到ModelClass中:

public class ModelClass
{
    public string I2CDevName { get; set; }
    public string I2CDeviceAddress { get; set; }

    public ModelClass(string DeviceName, string DeviceAddress)
    {
        this.I2CDevName = DeviceName;
        this.I2CDeviceAddress = DeviceAddress;
    }

    //Collection Factory
    public static ObservableCollection<ModelClass> CreateCollection(List<string[]> models)
    {
        ObservableCollection<ModelClass> tmpColl = new ObservableCollection<ModelClass>();
        foreach (string[] s in models)
        {
            tmpColl.Add(new ModelClass(s[0],s[1]));
        }
        return tmpColl;
    }
}

然后运行:

List<string[]> list = new List<string[]>() { new string[] {"Other",...},
                                                                      ...};
public ObservableCollection<ModelClass> _I2CDeviceList = ModelClass.CreateCollection(list);

多田...