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[Solved] DisplayColumnAttribute and RadGridView

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GridView

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Kakone asked on 10 May 2010, 05:09 PM

Hello,

I have an entity with a Type property like this (a foreign key) :

                    public sealed partial class Project : Entity         
            {         
                [Display(Name="Type")]         
                public ProjectType Type         
                {         
                    get { ... }         
                    set { ... }         
                }         
            }         

My ProjectType class has a DisplayColumn attribute :

                    [DisplayColumn("Label")]          
            public sealed partial class ProjectType : Entity          
            {         
                ...         
                public string Label         
                {         
                    get { ... }         
                    set { ... }         
                }         
                ...          
            }         

I want to autogenerate my columns in a RadGridView, but I didn't succeed for the Type property of my Project class. The value into this column is "ProjectType : PrimaryKey value", not my label.

Is there another way to display a foreign key column or must I forget to autogenerate columns ?

Cordially,
Stephane.

1 Answer, 1 is accepted

answered on 11 May 2010, 08:48 AM

I found a workaround to this problem. I share my idea (if someone is interested): I overrided the OnAutoGeneratingColumn method of the RadGridView :

                    protected override void OnAutoGeneratingColumn(GridViewAutoGeneratingColumnEventArgs e)         
            {         
                if (!e.Cancel)         
                {         
                    GridViewBoundColumnBase column = e.Column as GridViewBoundColumnBase;         
                    if (column != null)         
                    {         
                        Type type = column.DataType;         
                        if (type != null)         
                        {         
                            foreach (DisplayColumnAttribute attribute in type.GetCustomAttributes(typeof(DisplayColumnAttribute), true))         
                            {         
                                if (!String.IsNullOrEmpty(column.DataMemberBinding.Path.Path))         
                                {         
                                    column.DataMemberBinding = new Binding()         
                                    {         
                                        Path = new PropertyPath(column.DataMemberBinding.Path.Path + "." + attribute.DisplayColumn)         
                                    };
            			column.DataType = typeof(string);         
                                }         
                                break;         
                            }                               
                        }         
                    }         
                }         
                base.OnAutoGeneratingColumn(e);         
            }         

And it works !!!

Cordially,
Stephane.