WPF DataGrid title Header Binding fail

Introduction: Due to business needs for WPF in the DataGrid control the number of rows in statistics , but the statistics of the number of rows displayed on the column heading .

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If we use conventional Binding means updating DataGridTextColunm the Header word is no effect , because the WPF visual tree in no DataGridTextColumn element to map it (DataGridTextColumn not control, so it has no parent control) .

Error demonstration:

<DataGridTextColumn Binding="{Binding Test}" Header="{Binding ColName}"/>

Because the visual tree mechanism, we just need column headings as a control can be (Note: Header property will fail, need to initialize the Binding field) :

                <DataGridTextColumn Binding="{Binding Test}"Header="列名">
                    <DataGridTextColumn.HeaderTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding DataContext.ColName,UpdateSourceTrigger=PropertyChanged,Mode=TwoWay,
                       RelativeSource={RelativeSource AncestorType=DataGrid}}"/>
                        </DataTemplate>
                    </DataGridTextColumn.HeaderTemplate>
                </DataGridTextColumn>

I Binding field name is ColName , it replaced into your field name.