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;
}
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dy("nrwz");
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