如何设置文本框'；s值在MVVM[C#]中将其值传输到gridview时为空

我希望当点击ADD按钮时，文本框的值转移到gridview，文本框的值将被设置为空。如何做到这一点

My View(XAML file)
<Window x:Class="EEEMVVM.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:helper="clr-namespace:EEEMVVM.Helper"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:mo="clr-namespace:EEEMVVM.Model"
    xmlns:vm="clr-namespace:EEEMVVM.View_Model" mc:Ignorable="d"
    Title="MainWindow" Height="387" Width="567">
<Window.Resources>
    <vm:ShowStudentInfo x:Key="ShowStudentInfo"/>
    <vm:NewStudentViewModelBase x:Key="NewStudentViewModelBase"/>
    <mo:Student x:Key="Student"/>

</Window.Resources>

<Grid Height="263" Width="476">
    <Grid.Resources>
        <Style TargetType="TextBox">
            <Style.Triggers>
                <Trigger  Property="Validation.HasError" Value="true">
                    <Setter  Property="ToolTip" Value="{Binding RelativeSource={x:Static RelativeSource.Self}, Path=(Validation.Errors).CurrentItem.ErrorContent}" />

                </Trigger>
            </Style.Triggers>
        </Style>


    </Grid.Resources>
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="Auto" />
        <RowDefinition Height="48*" />
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="Auto"/>
        <ColumnDefinition Width="Auto"/>
        <ColumnDefinition Width="Auto"/>
        <ColumnDefinition Width="Auto"/>
        <ColumnDefinition Width="Auto" />
        <ColumnDefinition Width="18*" />
    </Grid.ColumnDefinitions>

    <Label Height="28" Margin="0,7,0,0" HorizontalAlignment="Left"  Name="label1" VerticalAlignment="Top" Content="Name" />
    <TextBox Grid.Column="1" Grid.Row="0" Height="23" Margin="6,12,0,0" 
             HorizontalAlignment="Left" Name="txtbox_name" VerticalAlignment="Top"
             Width="120" 
             Text="{Binding Source={StaticResource NewStudentViewModelBase}, Path=StudentName,
                            Mode=TwoWay,
                            UpdateSourceTrigger=PropertyChanged, NotifyOnValidationError=True, ValidatesOnDataErrors=True}"  />

    <Label   Grid.Column="2" Height="28" HorizontalAlignment="Left" Name="label2" VerticalAlignment="Top" Content="Roll No" Margin="0,10,0,0" Grid.RowSpan="2" />
    <TextBox Grid.Column="3" Grid.Row="0" Height="23" Margin="6,12,0,0" 
             HorizontalAlignment="Left" Name="txtbox_rollno" VerticalAlignment="Top" 
             Width="120" MaxLength="7" helper:TextBoxHelpers.IsNumeric="True"
             Text="{Binding Source={StaticResource NewStudentViewModelBase}, Path=StudentRollNo,
                            Mode=TwoWay,
                            UpdateSourceTrigger=PropertyChanged, NotifyOnValidationError=True, ValidatesOnDataErrors=True}"  />

    <Label Grid.Row="1" Height="28" Margin="0,7,0,0" HorizontalAlignment="Left" Name="label3" VerticalAlignment="Top" Content="Email" />
    <TextBox Grid.Column="1" Grid.Row="1" Height="23" Margin="6,12,0,0" 
             HorizontalAlignment="Left" Name="txtbox_email" VerticalAlignment="Top" 
             Width="120"
             Text="{Binding Source={StaticResource NewStudentViewModelBase}, Path=StudentEmail,
                            Mode=TwoWay,
                            UpdateSourceTrigger=PropertyChanged,
                            ValidatesOnDataErrors=True}"/>

    <Label   Grid.Column="2" Grid.Row="1" Height="28" Margin="0,7,0,0" HorizontalAlignment="Left" Name="label4" VerticalAlignment="Top" Content="Contact No"/>
    <TextBox Grid.Column="3" Grid.Row="1" Height="23" Margin="6,12,0,0" 
             HorizontalAlignment="Left" Name="txtbox_contactno" VerticalAlignment="Top" 
             Width="120" MaxLength="10" helper:TextBoxHelpers.IsNumeric="True"
             Text="{Binding Source={StaticResource NewStudentViewModelBase}, Path=StudentContactNo,
                            Mode=TwoWay,
                            UpdateSourceTrigger=PropertyChanged,
                            ValidatesOnDataErrors=True}"/>
        <ListView ItemsSource="{Binding Source={StaticResource NewStudentViewModelBase}, Path=Students}" Grid.Row="3" Grid.ColumnSpan="6" Width="393" Margin="28,23,55,25" HorizontalAlignment="Center" Background="White" Height="60">
            <ListView.View >
                <GridView>
                <GridViewColumn Header="Name" DisplayMemberBinding="{Binding Source={StaticResource NewStudentViewModelBase}, Path=StudentName}" Width="90"/>
                <GridViewColumn  Header="Roll No" DisplayMemberBinding="{Binding Source={StaticResource NewStudentViewModelBase}, Path=StudentRollNo}" Width="90"/>
                <GridViewColumn  Header="Email" DisplayMemberBinding="{Binding Source={StaticResource NewStudentViewModelBase}, Path=StudentEmail}" Width="90"/>
                <GridViewColumn  Header="Contact No" DisplayMemberBinding="{Binding Source={StaticResource NewStudentViewModelBase}, Path=StudentContactNo}" Width="90"/>
            </GridView>
            </ListView.View>
        </ListView>


    <Button Command="{Binding Source={StaticResource NewStudentViewModelBase}, Path=InsertDataCommand}" IsEnabled="{Binding IsValidSave}" Grid.Column="1" Grid.Row="4" Content="Add" Height="26" Margin="37,30,20,11" Name="button1" Width="75"  />
    <Button Content="Submit" Grid.Column="3" Grid.Row="4" Height="23" HorizontalAlignment="Left" Margin="24,33,0,0" Name="button2" VerticalAlignment="Top" Width="75" />
</Grid>

---

}

您的InsertDataCommand应该是这样的：

private RelayCommand _insertDataCommand;
    public RelayCommand InsertDataCommand
    {
        get
        {
            return _insertDataCommand
                   ?? (_insertDataCommand = new RelayCommand(
                       () =>
                       {
                           Students.Add(new Student
                           {
                               StudentRollNo = this.StudentRollNo,
                               StudentName = this.StudentName,
                               StudentEmail = this.StudentEmail,
                               StudentContactNo = this.StudentContactNo
                           });
                           StudentRollNo = String.Empty;
                           StudentName = String.Empty;
                           StudentEmail = String.Empty;
                           StudentContactNo = String.Empty;

                       }));

        }
    }

---

由于

Students

属性是一个

ObservableCollection

（这意味着实现

INotifyCollectionChanged

，更改后的属性将显示在UI中，无需触发或设置任何其他内容），对于其他四个属性，将其值设置为

String.Empty

将触发

NotifyPropertyChanged

方法，并且更改也将传播到UI

此错误即将出现：委托“System.Action”不接受0参数我正在使用GalaSoft.MvvmLight.Command通过Nugget使用“安装包MvvmLight”并添加“使用GalaSoft.MvvmLight.Command”；“通过将上述内部命令代码放入Save方法中，您可以实现同样的效果！……而且不要忘记实例化ObservableCollection@ManishPant命令的execute函数以一个对象作为参数。您可以将（obj）=>{…}而不是（）=>{…}.@Joseph通过这样做，文本框被清除，但空值存储在gridview中

namespace EEEMVVM.Model
{
class Student:INotifyProperty
{

    public string StudentRollNo
    {
        get; set;
    }
    public string StudentName
    {
        get; set;
    }
    public string StudentEmail
    {
        get; set;
    }
    public string StudentContactNo
    {
        get; set;
    }


    public void Save()
    {

    }
}

private RelayCommand _insertDataCommand;
    public RelayCommand InsertDataCommand
    {
        get
        {
            return _insertDataCommand
                   ?? (_insertDataCommand = new RelayCommand(
                       () =>
                       {
                           Students.Add(new Student
                           {
                               StudentRollNo = this.StudentRollNo,
                               StudentName = this.StudentName,
                               StudentEmail = this.StudentEmail,
                               StudentContactNo = this.StudentContactNo
                           });
                           StudentRollNo = String.Empty;
                           StudentName = String.Empty;
                           StudentEmail = String.Empty;
                           StudentContactNo = String.Empty;

                       }));

        }
    }