Xceed DataGrid for WPF v7.2 Documentation
DisplayMemberBindingInfo Property
Example 


Xceed.Wpf.DataGrid Assembly > Xceed.Wpf.DataGrid Namespace > Column Class : DisplayMemberBindingInfo Property
Gets or sets the binding information between a column and its corresponding field in the underlying data source.
Syntax
'Declaration
 
Public Property DisplayMemberBindingInfo As DataGridBindingInfo
'Usage
 
Dim instance As Column

Dim value As DataGridBindingInfo

 

instance.DisplayMemberBindingInfo = value

 

value = instance.DisplayMemberBindingInfo
public DataGridBindingInfo DisplayMemberBindingInfo {get; set;}

Property Value

A reference to DataGridBindingInfo that provides information about a column's binding to its corresponding field in the underlying data source.
Remarks
Unless the ValidationRules collection is cleared, it will always contain an ExceptionValidationRule and DataErrorValidationRule. If the DataErrorValidationRule is excluded from the collection of validation rules, validation errors reported by IDataErrorInfo will be ignored.
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.Implementation of the YearValidationRule validation rule.Implementation of the YearValidationRule validation rule.
<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>
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
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;

   }

 }

}
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

Column Class
Column Members