WPF DataGrid ComboBoxColumn 不更新绑定数据
WPF DataGrid ComboBoxColumn Not Updating Bound Data
我的数据网格中有一个下拉列,组合框的选项存储在 tmfCNCComponentStatus_threed table 中。我的主 table 有一个名为 [Status] 的列,它对应于 table.
中的关键列
正确的状态 [Description] 显示在我的数据网格中每一行的组合框中,但是当用户更改选择时,数据库没有更新,即使一切看起来都在正常工作。我已将 "UpdateSourceTrigger" 设置为 PropertyChanged,如许多类似帖子中所示,但仍然没有骰子。任何见解将不胜感激!
<CollectionViewSource x:Key="StatusItems"/>
<DataGridTemplateColumn x:Name="StatusColumn" Header="Status" Width="*" IsReadOnly="False">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock x:Name="cboStatus" Text="{Binding Path=Description}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<ComboBox x:Name="StatusCombo" SelectedValuePath="CNCComponentStatusKey" DisplayMemberPath="Description" SelectedValue="{Binding Status, UpdateSourceTrigger=PropertyChanged}" ItemsSource="{Binding Source={StaticResource StatusItems}}" IsEditable="True" IsSynchronizedWithCurrentItem="True"/>
</DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
</DataGridTemplateColumn>
后面的代码:
Dim com As String = "SELECT tmfCNCComponent_threed.[CNCComponentKey]
,tmfCNCComponent_threed.[CompanyID]
,tmfCNCComponent_threed.[JobNumber]
,tmfCNCComponent_threed.[LogNumber]
,tmfCNCComponent_threed.[Customer]
,tmfCNCComponent_threed.[DueDate]
,tmfCNCComponent_threed.[JobLeader]
,tmfCNCComponent_threed.[CADProgrammer]
,tmfCNCComponent_threed.[Salesperson]
,tmfCNCComponent_threed.[CNCProgrammer]
,tmfCNCComponent_threed.[ComponentDescription]
,tmfCNCComponent_threed.[ComponentFilePath]
,tmfCNCComponent_threed.[Material]
,tmfCNCComponent_threed.[ComponentSizeX]
,tmfCNCComponent_threed.[ComponentSizeY]
,tmfCNCComponent_threed.[ComponentSizeZ]
,tmfCNCComponent_threed.[QuantityShown]
,tmfCNCComponent_threed.[QuantityMirror]
,tmfCNCComponent_threed.[UpdateTime]
,tmfCNCComponent_threed.[Status]
,tmfCNCComponent_threed.[ProgStarted]
,tmfCNCComponentStatus_threed.[Description]
FROM [test_3DimensionalDB].[dbo].[tmfCNCComponent_threed]
INNER JOIN tmfCNCComponentStatus_threed
ON tmfCNCComponent_threed.Status = tmfCNCComponentStatus_threed.CNCComponentStatusKey
WHERE [ComponentDescription] " & component & " 'trode%' AND [CompanyID]='" & company & "' AND [Status]" & status & "ORDER BY [UpdateTime] DESC"
Dim Adpt As New SqlDataAdapter(com, con)
con.Open()
Dim ds As New DataSet()
Adpt.Fill(ds, "dbo.tmfCNCComponent_threed")
dataGrid1.ItemsSource = ds.Tables("dbo.tmfCNCComponent_threed").DefaultView
con.Close()
con.Open()
Dim statusCVS As CollectionViewSource = FindResource("StatusItems")
Dim com2 As String = "SELECT * FROM tmfCNCComponentStatus_threed"
Dim AdptStatus As New SqlDataAdapter(com2, con)
AdptStatus.Fill(ds, "dbo.tmfCNCComponentStatus_threed")
Dim statusRows = ds.Tables("dbo.tmfCNCComponentStatus_threed").Rows
Dim statuses As New List(Of Object)
For Each row As DataRow In statusRows
statuses.Add(New With {
.Status = CInt(row("CNCComponentStatusKey")),
.Description = CStr(row("Description"))
})
Next
statusCVS.Source = statuses
con.Close()
RowCount()
searchBox.Clear()
感谢您的宝贵时间。
数据库:
状态内容table:
数据网格:
这是昨天提出的这个问题的第一部分,目的是让我了解这一点:
根据另一个问题的评论中的信息,您可能需要将 SelectedValuePath="Status"
更改为 SelectedValuePath="CNCComponentStatusKey"
。组合框中的列名称或项目属性对于回答此问题至关重要,而您尚未提供。
当单元格离开编辑模式时,网格将更新 DataRowView 列值。
Mode=TwoWay
上的绑定是不必要的。这是 ComboBox.SelectedValue
.
上绑定的默认模式
您可以从 TextBlock.Text
上的绑定中删除所有这些装饰:它根本无法更新源,当您考虑它时,因此无需弄乱您的 XAML详细说明它应该如何以及何时做它无论如何也做不到的事情。
完整的工作示例
这是我用来测试上述答案的代码。它更新主 table 中的行。它不会将 table 保存到数据库中。那是另外一回事。
我不知道你的专栏是不是你想的那样叫,还是什么。
MainWindow.xaml.cs
public MainWindow()
{
InitializeComponent();
LoadData();
}
#region Lists
private static List<String> _status = new List<String>
{
"Ready",
"Not Ready",
"Weary",
"Disordered",
};
private static List<String> _words = new List<String>
{
"Ewwrigowasaus",
"Skubreuph",
"Creecroicr",
"Eunthaudrawtr",
"Ootwoww",
"Meuleetroithr",
"Rewshr",
"Scoysl",
"Scewziexul",
"Kawxayzeec",
};
#endregion Lists
protected void LoadData()
{
DataTable dtMain = new DataTable();
dtMain.Columns.Add("Status", typeof(int));
dtMain.Columns.Add("Programmer", typeof(String));
_words.ForEach(w =>
{
var row = dtMain.NewRow();
row[0] = ((int)w[0] % 2) + 1;
row[1] = w;
dtMain.Rows.Add(row);
});
DataTable dtStatus = new DataTable();
dtStatus.Columns.Add("CNCComponentStatusKey", typeof(int));
dtStatus.Columns.Add("Description", typeof(String));
_status.ForEach(s =>
{
var row = dtStatus.NewRow();
row[0] = dtStatus.Rows.Count + 1;
row[1] = s;
dtStatus.Rows.Add(row);
});
DataGrid.ItemsSource = dtMain.DefaultView;
var cvs = (FindResource("StatusItems") as CollectionViewSource);
cvs.Source = dtStatus.DefaultView;
}
MainWindow.xaml
<Window.Resources>
<CollectionViewSource x:Key="StatusItems" />
</Window.Resources>
<Grid>
<DataGrid x:Name="DataGrid" AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Programmer}" Header="Programmer" />
<DataGridTemplateColumn Header="Status">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding Status}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<ComboBox
ItemsSource="{Binding Source={StaticResource StatusItems}}"
SelectedValue="{Binding Status, UpdateSourceTrigger=PropertyChanged}"
DisplayMemberPath="Description"
SelectedValuePath="CNCComponentStatusKey"
x:Name="Combo"
/>
<!-- Selected value in combo -->
<Label Content="{Binding SelectedValue, ElementName=Combo}" />
<!-- Value of Status column in row -->
<Label Content="{Binding Status}" />
</StackPanel>
</DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
</Grid>
我的数据网格中有一个下拉列,组合框的选项存储在 tmfCNCComponentStatus_threed table 中。我的主 table 有一个名为 [Status] 的列,它对应于 table.
中的关键列正确的状态 [Description] 显示在我的数据网格中每一行的组合框中,但是当用户更改选择时,数据库没有更新,即使一切看起来都在正常工作。我已将 "UpdateSourceTrigger" 设置为 PropertyChanged,如许多类似帖子中所示,但仍然没有骰子。任何见解将不胜感激!
<CollectionViewSource x:Key="StatusItems"/>
<DataGridTemplateColumn x:Name="StatusColumn" Header="Status" Width="*" IsReadOnly="False">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock x:Name="cboStatus" Text="{Binding Path=Description}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<ComboBox x:Name="StatusCombo" SelectedValuePath="CNCComponentStatusKey" DisplayMemberPath="Description" SelectedValue="{Binding Status, UpdateSourceTrigger=PropertyChanged}" ItemsSource="{Binding Source={StaticResource StatusItems}}" IsEditable="True" IsSynchronizedWithCurrentItem="True"/>
</DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
</DataGridTemplateColumn>
后面的代码:
Dim com As String = "SELECT tmfCNCComponent_threed.[CNCComponentKey]
,tmfCNCComponent_threed.[CompanyID]
,tmfCNCComponent_threed.[JobNumber]
,tmfCNCComponent_threed.[LogNumber]
,tmfCNCComponent_threed.[Customer]
,tmfCNCComponent_threed.[DueDate]
,tmfCNCComponent_threed.[JobLeader]
,tmfCNCComponent_threed.[CADProgrammer]
,tmfCNCComponent_threed.[Salesperson]
,tmfCNCComponent_threed.[CNCProgrammer]
,tmfCNCComponent_threed.[ComponentDescription]
,tmfCNCComponent_threed.[ComponentFilePath]
,tmfCNCComponent_threed.[Material]
,tmfCNCComponent_threed.[ComponentSizeX]
,tmfCNCComponent_threed.[ComponentSizeY]
,tmfCNCComponent_threed.[ComponentSizeZ]
,tmfCNCComponent_threed.[QuantityShown]
,tmfCNCComponent_threed.[QuantityMirror]
,tmfCNCComponent_threed.[UpdateTime]
,tmfCNCComponent_threed.[Status]
,tmfCNCComponent_threed.[ProgStarted]
,tmfCNCComponentStatus_threed.[Description]
FROM [test_3DimensionalDB].[dbo].[tmfCNCComponent_threed]
INNER JOIN tmfCNCComponentStatus_threed
ON tmfCNCComponent_threed.Status = tmfCNCComponentStatus_threed.CNCComponentStatusKey
WHERE [ComponentDescription] " & component & " 'trode%' AND [CompanyID]='" & company & "' AND [Status]" & status & "ORDER BY [UpdateTime] DESC"
Dim Adpt As New SqlDataAdapter(com, con)
con.Open()
Dim ds As New DataSet()
Adpt.Fill(ds, "dbo.tmfCNCComponent_threed")
dataGrid1.ItemsSource = ds.Tables("dbo.tmfCNCComponent_threed").DefaultView
con.Close()
con.Open()
Dim statusCVS As CollectionViewSource = FindResource("StatusItems")
Dim com2 As String = "SELECT * FROM tmfCNCComponentStatus_threed"
Dim AdptStatus As New SqlDataAdapter(com2, con)
AdptStatus.Fill(ds, "dbo.tmfCNCComponentStatus_threed")
Dim statusRows = ds.Tables("dbo.tmfCNCComponentStatus_threed").Rows
Dim statuses As New List(Of Object)
For Each row As DataRow In statusRows
statuses.Add(New With {
.Status = CInt(row("CNCComponentStatusKey")),
.Description = CStr(row("Description"))
})
Next
statusCVS.Source = statuses
con.Close()
RowCount()
searchBox.Clear()
感谢您的宝贵时间。
数据库:
状态内容table:
数据网格:
这是昨天提出的这个问题的第一部分,目的是让我了解这一点:
根据另一个问题的评论中的信息,您可能需要将 SelectedValuePath="Status"
更改为 SelectedValuePath="CNCComponentStatusKey"
。组合框中的列名称或项目属性对于回答此问题至关重要,而您尚未提供。
当单元格离开编辑模式时,网格将更新 DataRowView 列值。
Mode=TwoWay
上的绑定是不必要的。这是 ComboBox.SelectedValue
.
您可以从 TextBlock.Text
上的绑定中删除所有这些装饰:它根本无法更新源,当您考虑它时,因此无需弄乱您的 XAML详细说明它应该如何以及何时做它无论如何也做不到的事情。
完整的工作示例
这是我用来测试上述答案的代码。它更新主 table 中的行。它不会将 table 保存到数据库中。那是另外一回事。
我不知道你的专栏是不是你想的那样叫,还是什么。
MainWindow.xaml.cs
public MainWindow()
{
InitializeComponent();
LoadData();
}
#region Lists
private static List<String> _status = new List<String>
{
"Ready",
"Not Ready",
"Weary",
"Disordered",
};
private static List<String> _words = new List<String>
{
"Ewwrigowasaus",
"Skubreuph",
"Creecroicr",
"Eunthaudrawtr",
"Ootwoww",
"Meuleetroithr",
"Rewshr",
"Scoysl",
"Scewziexul",
"Kawxayzeec",
};
#endregion Lists
protected void LoadData()
{
DataTable dtMain = new DataTable();
dtMain.Columns.Add("Status", typeof(int));
dtMain.Columns.Add("Programmer", typeof(String));
_words.ForEach(w =>
{
var row = dtMain.NewRow();
row[0] = ((int)w[0] % 2) + 1;
row[1] = w;
dtMain.Rows.Add(row);
});
DataTable dtStatus = new DataTable();
dtStatus.Columns.Add("CNCComponentStatusKey", typeof(int));
dtStatus.Columns.Add("Description", typeof(String));
_status.ForEach(s =>
{
var row = dtStatus.NewRow();
row[0] = dtStatus.Rows.Count + 1;
row[1] = s;
dtStatus.Rows.Add(row);
});
DataGrid.ItemsSource = dtMain.DefaultView;
var cvs = (FindResource("StatusItems") as CollectionViewSource);
cvs.Source = dtStatus.DefaultView;
}
MainWindow.xaml
<Window.Resources>
<CollectionViewSource x:Key="StatusItems" />
</Window.Resources>
<Grid>
<DataGrid x:Name="DataGrid" AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Programmer}" Header="Programmer" />
<DataGridTemplateColumn Header="Status">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding Status}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<ComboBox
ItemsSource="{Binding Source={StaticResource StatusItems}}"
SelectedValue="{Binding Status, UpdateSourceTrigger=PropertyChanged}"
DisplayMemberPath="Description"
SelectedValuePath="CNCComponentStatusKey"
x:Name="Combo"
/>
<!-- Selected value in combo -->
<Label Content="{Binding SelectedValue, ElementName=Combo}" />
<!-- Value of Status column in row -->
<Label Content="{Binding Status}" />
</StackPanel>
</DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
</Grid>