用DataGrid进行数据验证,一句话:太简单了,为什么?因为它自身已经具备了很完善的数据验证功能。
好,说多无益,最好的办法,来,写个例子试试。
老规矩,先准备点数据来测试,既然要数据验证,就不能全弄字符串的,弄点整型的,日期型的,这样就有利于演示。
public class Employee { public string Name { get; set; } public int Age { get; set; } public DateTime Birthday { get; set; } }
该类声明三个属性,分别是字符串,整型,日期型。
要进行验证只需做好以下工作:
把Binding的ValidatesOnExceptions设为True,NotifyOnValidationError设为true,UpdateSourceTrigger设置为Explicit。
好,看XAML:
<UserControl x:Class="DataValidationSample.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480" xmlns:sdk="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"> <Grid x:Name="LayoutRoot"> <sdk:DataGrid x:Name="Grid" CanUserReorderColumns="True" CanUserSortColumns="True" AutoGenerateColumns="False"> <sdk:DataGrid.Columns> <!--声明列,并进行绑定--> <sdk:DataGridTextColumn Header="姓名" Width="auto"> <sdk:DataGridTextColumn.Binding> <Binding Path="Name" Mode="TwoWay" UpdateSourceTrigger="Explicit" ValidatesOnExceptions="True" NotifyOnValidationError="True"/> </sdk:DataGridTextColumn.Binding> </sdk:DataGridTextColumn> <sdk:DataGridTextColumn Header="年龄" Width="auto"> <sdk:DataGridTextColumn.Binding> <Binding Path="Age" Mode="TwoWay" ValidatesOnExceptions="True" NotifyOnValidationError="True" UpdateSourceTrigger="Explicit"/> </sdk:DataGridTextColumn.Binding> </sdk:DataGridTextColumn> <sdk:DataGridTextColumn Header="生日" Width="auto"> <sdk:DataGridTextColumn.Binding> <Binding Path="Birthday" Mode="TwoWay" ValidatesOnExceptions="True" NotifyOnValidationError="True" UpdateSourceTrigger="Explicit"/> </sdk:DataGridTextColumn.Binding> </sdk:DataGridTextColumn> </sdk:DataGrid.Columns> </sdk:DataGrid> </Grid> </UserControl>
public partial class MainPage : UserControl { ObservableCollection<Employee> Employs = null; public MainPage() { InitializeComponent(); this.Employs = new ObservableCollection<Employee>(); Employs.Add(new Employee { Name = "李小同",Age = 27,Birthday = new DateTime(1988,12,10) }); Employs.Add(new Employee { Name = "南郭先生",Age = 43,Birthday = new DateTime(1976,3,12) }); Employs.Add(new Employee { Name = "汤老头",Age = 36,Birthday = new DateTime(1978,5,1) }); Employs.Add(new Employee { Name = "林大吉",Age = 28,Birthday = new DateTime(1987,6,21) }); //绑定 this.Grid.ItemsSource = Employs; } }
好了,请申出你的手指头,轻轻地按一下F5,把程序Run起来。
我们在年龄上选一条记录,进入编辑状态后,输入字母(应为整数),然后试着确认,看看发生了什么事?
在日期处也试试。
原文链接: http://www.voidcn.com/article/p-hqmgvgwb-bgd.html
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