需要从CodeBehind中的DataTemplate内部访问具名的DataGridTextColumn

问题描述

我有一个DataGrid，其中包含一组使用x:Name命名的DataGridTextColumns.一旦将该DataGrid包裹在Dataemplate中，就无法再在后面的代码中访问这些DataGridTextColumns了.我需要再次访问它们，因为我需要以编程方式设置每列的可见性".有什么办法可以访问它们?这是XAML的当前结构.

我确实尝试过与设置Header相似的方法-指向父类中的属性，但这也不起作用...

I have a DataGrid that contains a group of DataGridTextColumns named using x:Name. Once I wrapped that DataGrid inside a Dataemplate, I can no longer access these DataGridTextColumns in the Code-behind. I need to gain access to them again, as I need to programmatically set each column''s Visibility. Is there any way to access them? Here''s the current structure of the XAML.

I did try something similar to how I set the Header - pointing to a property in the parent class, but that isn''t working either...

<StackPanel Visibility="{Binding Path=ML300LogFileVisibility}">
    <ItemsControl ItemsSource="{Binding Path=ParentController.Logs}">
        <ItemsControl.ItemTemplate>
            <DataTemplate x:Name="dataTemplateML300" DataType="{x:Type src:LogFile}">
                <Expander Style="{StaticResource StatusGroupExpander}" Header="{Binding Path=MethodName}">
                    <DataGrid x:Name="dataGidML300" Visibility="Visible" CanUserReorderColumns="True" Margin="0,10,0,0"

                            IsReadOnly="True" HeadersVisibility="Column" CanUserSortColumns="False"

                            AutoGenerateColumns="False" ItemsSource="{Binding Path=LogStepDetails}">
                        <DataGrid.Columns>
                                            
                            <DataGridTextColumn x:Name="ColTitleML300Step" HeaderStyle="{StaticResource GridHeader}" Binding="{Binding Path=StepNumber}"

                                    Header="{Binding RelativeSource={x:Static RelativeSource.Self}, Converter={StaticResource ResourceKey=StringConverter}, ConverterParameter=step}">
                            </DataGridTextColumn>
                                            
                            <DataGridTextColumn x:Name="ColTitleML300StartTime" HeaderStyle="{StaticResource GridHeader}" Binding="{Binding Path=ParentTask.StartTime}"

                                    Header="{Binding RelativeSource={x:Static RelativeSource.Self}, Converter={StaticResource ResourceKey=StringConverter}, ConverterParameter=txtStartTime}">
                            </DataGridTextColumn>

                            <DataGridTextColumn x:Name="ColTitleML300Duration" HeaderStyle="{StaticResource GridHeader}" Binding="{Binding Path=ParentTask.Duration}"

                                    Header="{Binding RelativeSource={x:Static RelativeSource.Self}, Converter={StaticResource ResourceKey=StringConverter}, ConverterParameter=Duration}">
                            </DataGridTextColumn>
                        </DataGrid.Columns>
                    </DataGrid>
                </Expander>
            </DataTemplate>
        </ItemsControl.ItemTemplate>
    </ItemsControl>
</StackPanel>

Suggestions?

推荐答案

private void dataGidML300_Initialized( object sender, EventArgs e )
{
    try
    {
        DataGrid dg = sender as DataGrid;
        foreach( DataGridTextColumn col in dg.Columns )
        {
            string strColName = col.Header.ToString( );

            // Shared Column Headers
            if( strColName == mStrings.GetStringWithThreadCulture( "txtStep" ) )
                col.Visibility = this.GridStep;
            else if( strColName == mStrings.GetStringWithThreadCulture( "txtStartTime" ) )
                col.Visibility = this.GridStartTime;
            else if( strColName == mStrings.GetStringWithThreadCulture( "txtDuration" ) )
                col.Visibility = this.GridDuration;

            // New Log Type Column Headers
            else if( strColName == mStrings.GetStringWithThreadCulture( "txtStepType" ) )
                col.Visibility = this.GridStepType;
            else if( strColName == mStrings.GetStringWithThreadCulture( "txtFluidVol" ) )
                col.Visibility = this.GridFluidVolume;
            else if( strColName == mStrings.GetStringWithThreadCulture( "txtFlowRate" ) )
                col.Visibility = this.GridFlowRate;
            else if( strColName == mStrings.GetStringWithThreadCulture( "txtValvePos" ) )
                col.Visibility = this.GridValvePosition;
            else if( strColName == mStrings.GetStringWithThreadCulture( "txtTipSize" ) )
                col.Visibility = this.GridTipSize;
            else if( strColName == mStrings.GetStringWithThreadCulture( "txtLiquidClass" ) )
                col.Visibility = this.GridLiquidClass;
        }
    }
    catch( Exception ex )
    {
        Errors.ErrorMessage( ex, new StackFrame( ), true );
        mLog.Error( ex.Message, ex );
    }
}

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