//值改變後觸發
Console.WriteLine(((DataGridColumn)sender).Width);
}//妳可以使用綁定,下面的例子就是,當拉動第壹列的寬度的時候,動態顯示在文本上
<DataGrid?x:Name="dataGridDemo"?Grid.Row="1"?MaxHeight="600"?MaxWidth="800"?CanUserAddRows="False"?AutoGenerateColumns="False"?RowHeaderWidth="0"?>
<DataGrid.Columns>
<DataGridTextColumn?Binding="{Binding?Name}"?Header="姓名"?Width="200"></DataGridTextColumn>
<DataGridTextColumn?Binding="{Binding?Name}"?Header="姓名"?Width="200"></DataGridTextColumn>
<DataGridTextColumn?Binding="{Binding?Name}"?Header="姓名"?Width="200"></DataGridTextColumn>
<DataGridTextColumn?Binding="{Binding?Age}"?Header="年齡"?Width="200"></DataGridTextColumn>
<DataGridTextColumn?Binding="{Binding?Age}"?Header="年齡"?Width="200"></DataGridTextColumn>
</DataGrid.Columns>
</DataGrid>
<TextBlock?Grid.Row="0"?Text="{Binding?ElementName=dataGridDemo,Path=Columns[0].Width}"></TextBlock>
//如果妳想要值改變,但未還尚未生效,妳就要重寫元數據了