如何重新绑定Silverlight DataGrid [英] how rebind silverlight datagrid
本文介绍了如何重新绑定Silverlight DataGrid的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我只是在Silverlight中做一个简单的示例，该示例从数据库中检索数据，还可以插入，更新和删除
我将子窗口用于插入命令，当我在此ChildWindow上单击确定"按钮时，它将插入数据库中，但未在页面上呈现(Silverlight内容)，因此存在相同的记录，因此数据库中确实会插入信息.仅在再次重新午餐此页面后，它才能正确显示(从服务器检索所有数据)
我会发布我的来源
这是Customer.xaml文件
I am just doing simple example in Silverlight, which retrieves data from database, can also insert, update and delete
I use child window for insert command, when I click "OK" Button at this ChildWindow it insert''s in database but not renders on page(Silverlight content), there is same records therefore in database really inserts information. only after again re-lunch this page, it shows correctly(retrieves all data from server)
I''ll post my source
this is Customers.xaml file
<UserControl x:Class="Store.Customers"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mv="clr-namespace:Store.ViewModel"
xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"
mc:Ignorable="d"
d:DesignHeight="500" d:DesignWidth="1000">
<UserControl.Resources>
<mv:ViewModel x:Key="ViewModel"/>
</UserControl.Resources>
<Grid x:Name="LayoutRoot" Background="White">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="127*" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="130*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="91*" />
<RowDefinition Height="99*" />
<RowDefinition Height="110*" />
</Grid.RowDefinitions>
<Button Name="btnEdit" Content="Edit" HorizontalAlignment="Right" Grid.Column="1" Width="55" Height="30" Margin="0,225,0,0" Click="btnEdit_Click" />
<data:DataGrid Name="dgCustomer"
AutoGenerateColumns="False" VerticalScrollBarVisibility="Visible"
ItemsSource="{Binding Items, Mode=TwoWay, Source={StaticResource ViewModel}}"
Grid.Row="1" Grid.Column="1">
<data:DataGrid.Columns>
<data:DataGridTextColumn Header="ID" Binding="{Binding CustomerID}"/>
<data:DataGridTextColumn Header="CompanyName" Binding="{Binding CompanyName}"/>
<data:DataGridTextColumn Header="ContactName" Binding="{Binding ContactName}"/>
<data:DataGridTextColumn Header="ContactTitle" Binding="{Binding ContactTitle}"/>
<data:DataGridTextColumn Header="Address" Binding="{Binding Address}"/>
<data:DataGridTextColumn Header="City" Binding="{Binding City}"/>
<data:DataGridTextColumn Header="Region" Binding="{Binding Region}"/>
<data:DataGridTextColumn Header="PostalCode" Binding="{Binding PostalCode}"/>
<data:DataGridTextColumn Header="Country" Binding="{Binding Country}"/>
<data:DataGridTextColumn Header="Phone" Binding="{Binding Phone}"/>
<data:DataGridTextColumn Header="Fax" Binding="{Binding Fax}"/>
<data:DataGridCheckBoxColumn Header="IsCitizen" Binding="{Binding IsCitizen}"/>
</data:DataGrid.Columns>
</data:DataGrid>
<data:DataPager HorizontalContentAlignment="Center" x:Name="myPager"
Source="{Binding ItemsSource, ElementName=dgCustomer}"
AutoEllipsis="True"
PageSize="10" Grid.Row="2" Grid.Column="1" VerticalAlignment="Top"/>
</Grid>
</UserControl>
这是子窗口
this is childwindow
<<pre lang="xml">controls:ChildWindow x:Class="Store.AddNewCustomer"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:controls="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls"
xmlns:mv="clr-namespace:Store.ViewModel"
Width="450" Height="350"
Title="AddNewCustomer" >
<controls:ChildWindow.Resources>
<mv:ViewModel x:Key="ViewModel"/>
</controls:ChildWindow.Resources>
<Grid x:Name="LayoutRoot" Margin="2">
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid>
<Grid.RowDefinitions >
<RowDefinition Height="30" />
<RowDefinition Height="30" />
<RowDefinition Height="30" />
<RowDefinition Height="30" />
<RowDefinition Height="30" />
<RowDefinition Height="30" />
<RowDefinition Height="30" />
<RowDefinition Height="30" />
<RowDefinition Height="30" />
<RowDefinition Height="30" />
<RowDefinition Height="30" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions >
<ColumnDefinition Width="30*"></ColumnDefinition>
<ColumnDefinition Width="70*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<TextBlock Grid.Row="1" Grid.Column="0" Text="Customer ID :" VerticalAlignment="Center" Margin="2,0,0,0" />
<TextBox Grid.Row="1" Grid.Column="1" VerticalAlignment="Center" Margin="2,0" x:Name="txtCustomerID"
Text="{Binding CustomerID, Mode=TwoWay, Source={StaticResource ViewModel}}" />
<TextBlock Grid.Row="2" Grid.Column="0" Text="Company Name :" VerticalAlignment="Center" Margin="2,0,0,0" />
<TextBox Grid.Row="2" Grid.Column="1" VerticalAlignment="Center" Margin="2,0" x:Name="txtCompanyName"
Text="{Binding CompanyName, Mode=TwoWay, Source={StaticResource ViewModel}}"/>
<TextBlock Grid.Row="3" Grid.Column="0" Text="Contact Name :" VerticalAlignment="Center" Margin="2,0,0,0" />
<TextBox Grid.Row="3" Grid.Column="1" VerticalAlignment="Center" Margin="2,0" x:Name="txtContactName" />
<TextBlock Grid.Row="4" Grid.Column="0" Text="Contact Title :" VerticalAlignment="Center" Margin="2,0,0,0" />
<TextBox Grid.Row="4" Grid.Column="1" VerticalAlignment="Center" Margin="2,0" x:Name="txtContactTitle" />
<TextBlock Grid.Row="5" Grid.Column="0" Text="Address :" VerticalAlignment="Center" Margin="2,0,0,0" />
<TextBox Grid.Row="5" Grid.Column="1" VerticalAlignment="Center" Margin="2,0" x:Name="txtAddressTitle" />
<TextBlock Grid.Row="6" Grid.Column="0" Text="City :" VerticalAlignment="Center" Margin="2,0,0,0" />
<TextBox Grid.Row="6" Grid.Column="1" VerticalAlignment="Center" Margin="2,0" x:Name="txtCity" />
<TextBlock Grid.Row="7" Grid.Column="0" Text="Country :" VerticalAlignment="Center" Margin="2,0,0,0" />
<TextBox Grid.Row="7" Grid.Column="1" VerticalAlignment="Center" Margin="2,0" x:Name="txtCountry" />
</Grid>
<Button x:Name="CancelButton" Content="Cancel" Click="CancelButton_Click" Width="75" Height="23" HorizontalAlignment="Right" Margin="0,12,0,0" Grid.Row="1" />
<Button x:Name="OKButton" Content="OK" Width="75" Height="23" HorizontalAlignment="Right" Click="OKButton_Click"
Margin="0,12,79,0" Grid.Row="1" Command="{ Binding AddNewCustomer, Mode=TwoWay, Source={StaticResource ViewModel} }"/>
</Grid>
</controls:ChildWindow
>
这是我的ViewModel
>
this is My ViewModel
public class ViewModel : BaseViewModel
{
#region Fields
public ObservableCollection<Customer> _items;
public PagedCollectionView _view;
public string _customerID;
public string _companyName;
#endregion
#region Constructors
public ViewModel()
{
if (!this.IsDesignTime)
this.LoadCustomer();
}
#endregion
#region Properties
public ICommand AddNewCustomer { get { return new AddNewCustomerInfo(this); } }
public ObservableCollection<Customer> Items
{
get { return this._items; }
set
{
this._items = value;
this.OnPropertyChanged("Items");
}
}
public PagedCollectionView PagedView
{
get { return this._view; }
set
{
this._view = value;
this.OnPropertyChanged("PagedView");
}
}
public string CustomerID
{
get { return this._customerID;}
set
{
this._customerID = value;
this.OnPropertyChanged("CustomerID");
}
}
public string CompanyName
{
get { return this._companyName; }
set
{
this._companyName = value;
this.OnPropertyChanged("CompanyName");
}
}
#endregion
#region Methods
public void LoadCustomer()
{
DataServiceClient webService = new DataServiceClient();
webService.GetCustomersCompleted += new EventHandler<GetCustomersCompletedEventArgs>(webService_GetCustomersCompleted);
webService.GetCustomersAsync();
}
public void webService_GetCustomersCompleted(object sender, GetCustomersCompletedEventArgs e)
{
Items = e.Result;
PagedCollectionView pageView = new PagedCollectionView(Items);
pageView.PageSize = 10;
PagedView = pageView;
}
public void CreateCustomer()
{
DataServiceClient webservice = new DataServiceClient();
Customer cust = new Customer();
cust.CustomerID = this.CustomerID;
cust.CompanyName = this.CompanyName;
webservice.InsertCustomerCompleted += new EventHandler<InsertCustomerCompletedEventArgs>(webservice_InsertCustomerCompleted);
webservice.InsertCustomerAsync(cust);
LoadCustomer();
}
void webservice_InsertCustomerCompleted(object sender, InsertCustomerCompletedEventArgs e)
{
this.CreateResult = e.Result;
}
#endregion
}
public class AddNewCustomerInfo : ICommand
{
#region Fields
public ViewModel ViewModel { get; set; }
#endregion
#region Constructors
public AddNewCustomerInfo(ViewModel viewModel)
{
this.ViewModel = viewModel;
}
#endregion
public bool CanExecute(object parameter)
{
return true;
}
public event EventHandler CanExecuteChanged;
public void Execute(object parameter)
{
this.ViewModel.CreateCustomer();
}
}
网格和子窗口看起来像此
Grid and childwindow looks like this
推荐答案
我检查了您的代码，但看不到您做了_items.Add(cust);之类的事情.
您应该将创建的新客户实例添加到_items集合中.
I went through your code but could not see you do something like_items.Add(cust);.
You should be adding the new customer instance that you create to the _itemscollection.
这篇关于如何重新绑定Silverlight DataGrid的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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