在WPF中，如果DataGrid里使用了模板列，当拖动滚动条时，往往会出现列表内容显示混乱的情况。解决方法就是在Binding的时候给UpdateSourceTrigger赋值。
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="25"></RowDefinition>
<RowDefinition></RowDefinition>
</Grid.RowDefinitions>
<Button Height="23" Click="Button_Click" Content="Click" Grid.Row="0"></Button>
<DataGrid Name="dgStudent" AutoGenerateColumns="False" IsEnabled="True" Grid.Row="1"
EnableColumnVirtualization="True" EnableRowVirtualization="True">
<DataGrid.Columns>
<DataGridTextColumn Header="Name" Binding="{Binding Name}" Width="80"></DataGridTextColumn>
<DataGridTemplateColumn Header="Age" Width="70">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBox Margin="5" Text="{Binding Age, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"></TextBox>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
<DataGridTemplateColumn Header="Course" Width="100">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<ComboBox Margin="5" ItemsSource="{Binding CourseSource}" Text="{Binding Course, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"></ComboBox>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
</Grid>
后台代码如下：
public class Student
{
public string Name { get; set; }
public string Age { get; set; }
public List<string> CourseSource { get; set; } = new List<string>() { "C", "C++", "C#" };
public string Course { get; set; }
}
private void Button_Click(object sender, RoutedEventArgs e)
{
var students = new List<Student>();
for (int i = 1; i <= 50; i++)
{
var student = new Student()
{
Name = $"student{i}"
};
students.Add(student);
}
this.dgStudent.ItemsSource = null;
this.dgStudent.ItemsSource = students;
}
