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Xceed Toolkit Plus for WPF v5.0 Documentation
Xceed.Wpf.DataGrid Assembly / Xceed.Wpf.DataGrid Namespace / DataGridBindingInfo Class
Members Example


In This Topic
    DataGridBindingInfo Class
    In This Topic
    Class that creates and wraps a binding that is used by a column to retrieve and validate its values.
    Syntax
    'Declaration
 
Public Class DataGridBindingInfo 
    'Usage
 
Dim instance As DataGridBindingInfo
    public class DataGridBindingInfo
    Remarks

    The following table provides a list of the underlying binding's properties and their immutable values.

    Property Value
    Mode Property BindingMode.TwoWay (see ReadOnly property)
    UpdateSourceTrigger Property UpdateSourceTriggerExplicit (see UpdateSourceTrigger property)
    ValidatesOnDataErrors Property true
    ValidatesOnExceptions Property true
    NotifyOnTargetUpdated Property true
    NotifyOnValidationError Property true
    Example

    All examples in this topic assume that the grid is bound to a list of Composer objects, unless stated otherwise.

    The following example demonstrates how to create a custom ValidationRule and apply it to a column's binding to provide binding-level validation.
    <Grid xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid"
     xmlns:local="clr-namespace:Xceed.Wpf.Documentation">
  <Grid.Resources>
     <xcdg:DataGridCollectionViewSource x:Key="cvs_composers"
                                        Source="{Binding Source={x:Static Application.Current}, 
                                                         Path=Composers}"/>
  </Grid.Resources>
 
  <xcdg:DataGridControl ItemsSource="{Binding Source={StaticResource cvs_composers}}"
                        UpdateSourceTrigger="RowEndingEdit">
     <xcdg:DataGridControl.Columns> 
       <xcdg:Column FieldName="BirthYear">
          <xcdg:Column.DisplayMemberBindingInfo>
             <xcdg:DataGridBindingInfo Path="BirthYear">
                <xcdg:DataGridBindingInfo.ValidationRules>
                   <local:YearValidationRule />
                </xcdg:DataGridBindingInfo.ValidationRules>
             </xcdg:DataGridBindingInfo>
          </xcdg:Column.DisplayMemberBindingInfo>
       </xcdg:Column>

       <xcdg:Column FieldName="DeathYear">
          <xcdg:Column.DisplayMemberBindingInfo>
             <xcdg:DataGridBindingInfo Path="DeathYear">
                <xcdg:DataGridBindingInfo.ValidationRules>
                   <local:YearValidationRule />
                </xcdg:DataGridBindingInfo.ValidationRules>
             </xcdg:DataGridBindingInfo>
          </xcdg:Column.DisplayMemberBindingInfo>
       </xcdg:Column>      
    </xcdg:DataGridControl.Columns>
  </xcdg:DataGridControl>
</Grid>
    Implementation of the YearValidationRule validation rule.
    Imports System
Imports System.Windows.Controls
Imports System.Globalization
Namespace Xceed.Wpf.Documentation

  Public Class YearValidationRule
               Inherits ValidationRule

    Public Overrides Function Validate( ByVal value As Object, _
                                        ByVal cultureInfo As CultureInfo ) As ValidationResult
      Dim year As Integer = CInt( value )
      If year > DateTime.Now.Year Then
        Return New ValidationResult( False, "Chosen year cannot be greater than this year." )
      End If
      Return ValidationResult.ValidResult
    End Function
  End Class
End Namespace
    Implementation of the YearValidationRule validation rule.
    using System;
using System.Windows.Controls;
using System.Globalization;
namespace Xceed.Wpf.Documentation
{

 public class YearValidationRule : ValidationRule
 {
   public override ValidationResult Validate( object value, CultureInfo cultureInfo )
   {
     int year = ( int )value;
     if( year > DateTime.Now.Year )
       return new ValidationResult( false, "Chosen year cannot be greater than this year." );
     return ValidationResult.ValidResult;
   }
 }
}
    Inheritance Hierarchy

    System.Object
       Xceed.Wpf.DataGrid.DataGridBindingInfo

    Requirements

    Target Platforms: Windows 11, Windows 10, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

    See Also

    Reference

    DataGridBindingInfo Members
    Xceed.Wpf.DataGrid Namespace

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