Use as RadGridView editor

As many other RadControls, RadCheckedDropDownList can also be used as editor in RadGridView. This article will show you how to achieve the following result.

Figure 1: RadCheckedDropDownList as an editor in RadGridView

1. Add a RadGridView to a Form and add a regular text box column which will use the new editor. You can bind the grid to a list of sample data and create the data source for RadCheckedDropDownList:

The "MyPart" class contains a singe public property named "CurrentParts" and a constructor that sets this property.

Initialize

BindingList<MyPart> columnData;
BindingList<MyPart> datasource;
public UseAsRadGridViewEditor1()
{
    InitializeComponent();

    columnData = new BindingList<MyPart>();
    datasource = new BindingList<MyPart>();

    for (int i = 0; i < 5; i++)
    {
        datasource.Add(new MyPart("Part " + i + ";Part " + (i + 1) + ";"));
    }
    radGridView1.AutoGenerateColumns = false;
    radGridView1.DataSource = datasource;

    GridViewTextBoxColumn checkedDropDownListColumn = new GridViewTextBoxColumn();
    checkedDropDownListColumn.FieldName = "CurrentParts";
    checkedDropDownListColumn.Width = 200;

    this.radGridView1.Columns.Add(checkedDropDownListColumn);

    for (int i = 0; i < 10; i++)
    {
        columnData.Add(new MyPart("Part " + i));
    }

    this.radGridView1.EditorRequired += radGridView1_EditorRequired;
}

Private columnData As BindingList(Of MyPart)
Private datasource As BindingList(Of MyPart)
Public Sub New()
    InitializeComponent()
    columnData = New BindingList(Of MyPart)()
    datasource = New BindingList(Of MyPart)()
    For i As Integer = 0 To 4
        datasource.Add(New MyPart("Part " & i & ";Part " & (i + 1) & ";"))
    Next i
    radGridView1.AutoGenerateColumns = False
    radGridView1.DataSource = datasource
    Dim checkedDropDownListColumn As New GridViewTextBoxColumn()
    checkedDropDownListColumn.FieldName = "CurrentParts"
    checkedDropDownListColumn.Width = 200
    Me.RadGridView1.Columns.Add(checkedDropDownListColumn)
    For i As Integer = 0 To 9
        columnData.Add(New MyPart("Part " & i))
    Next i
    AddHandler Me.radGridView1.EditorRequired, AddressOf radGridView1_EditorRequired
End Sub

2. The next step is to replace the default editor. This can be achieved by handling the EditorReqired event. This is the place where the data source should be set as well.

Change the editor

void radGridView1_EditorRequired(object sender, EditorRequiredEventArgs e)
{
    if (this.radGridView1.CurrentColumn.Index == 0)
    {
        RadCheckedDropDownListElement editor = new GridViewCheckedDropDownListEditor();
        editor.DataSource = this.columnData;
        editor.DisplayMember = "CurrentParts";
        e.Editor = editor;
    }
}

Private Sub radGridView1_EditorRequired(ByVal sender As Object, ByVal e As EditorRequiredEventArgs)
    If Me.radGridView1.CurrentColumn.Index = 0 Then
        Dim editor As RadCheckedDropDownListElement = New GridViewCheckedDropDownListEditor()
        editor.DataSource = Me.columnData
        editor.DisplayMember = "CurrentParts"
        e.Editor = editor
    End If
End Sub

3. The final step is creating the editor. This can be achieved by creating a descendant of RadCheckedDropDownListElement and overriding its Value property.

Editor

public class GridViewCheckedDropDownListEditor : RadCheckedDropDownListElement
{
    public override object Value
    {
        get
        {
            return this.Text;
        }
        set
        {
            this.Text = value.ToString();
        }
    }
}

Public Class GridViewCheckedDropDownListEditor
    Inherits RadCheckedDropDownListElement
    Public Overrides Property Value() As Object
        Get
            Return Me.Text
        End Get
        Set(ByVal value As Object)
            Me.Text = value.ToString()
        End Set
    End Property
End Class