WPF MVVM DataGrid content DataGridComboBoxColumn bound data source drop-down box?-CodePudding

 & lt; The DataGrid IsReadOnly="False" AutoGenerateColumns="False" Background="white" 
CanUserResizeColumns="False" CanUserResizeRows="False" SelectionMode="Single" 
CanUserReorderColumns="False" AlternationCount="2" RowHeaderWidth="0" CanUserAddRows="False" ItemsSource="{Binding StaffVos, Mode=TwoWay}" SelectedItem="{Binding SelectStaffEntity}" & gt; 
 
TextBinding="{Binding QualityGauge}" SelectedValueBinding="{Binding QualityGauge}"/& gt;

This is the DataGrid xaml I need to put quality as the column drop-down box bound data source;

 & lt; DataGridComboBoxColumn Header="quality" Width="*" ItemsSource="{Binding QualityGauge}" DisplayMemberPath="{Binding QualityGaugeName}" SelectedValuePath="{Binding QualityGaugeID}" 
TextBinding="{Binding QualityGauge}" SelectedValueBinding="{Binding QualityGauge}"/& gt;

Unit where I use the drop-down ComboBox binding items, but I have tried two ways, not bound up,

///& lt; Summary> 
///
///& lt;/summary> 
Private ListPublic List{
The get {return _UnitSheet; } 
Set 
{
If (_UnitSheet!=value) 
{
_UnitSheet=value; 
RaisePropertyChanged (()=& gt; UnitSheet); 
} 
} 
} 

///& lt; Summary> 
///quality 
///& lt;/summary> 
Private ListPublic List{
The get {return _QualityGauge; } 
Set 
{
If (_QualityGauge!=value) 
{
_QualityGauge=value; 
RaisePropertyChanged (()=& gt; QualityGauge); 
} 
} 
}

Here is the association and drop-down box ItemsSource,

//unitPrivate List{
List
Return UnitSheet; 
} 

//quality 
Private List{
ListReturn QualityGauge; 
} 


//bind is where needed directly to a drop-down box ItemsSource assignment data query, 
//a drop-down box on the page is like this but not in the form of binding, I also try to other method eventually fails, 
////
UnitSheet=DanWei (); 

////quality 
QualityGauge=ZhiLiang ();

Here to query the database data as a drop-down,
Is not binding data, my goal is in the form binding drop-down boxes, drop-down box of the data from a database query data,

CodePudding user response:

Your DataContext DataGridComboBoxColumn here with the DataGrid DataContext is different, so you need to specified in DataGridComboBoxColumn DataContext