ASPXGridListEditor - Group rows show plain text in version 14.2

Ken Grant

created 10 years ago

I am upgrading a XAF application from 13.2 to 14.2.

I have a Grouped column in a listview where the grouped item is an returned as enum item. In 13.2 the attribute Imagename showed the image and dipslayname in the column name next to expand icon.

A line in the Enum:

<XafDisplayName("Not yet processed")> _
<ImageName("State_Validation_Skipped")> _
Unprocessed = 0
The corrected XAFDisplayname works but the image is no longer showing although works in 13.2?

Many thanks for looking into this for me.

Ken

Answers approved by DevExpress Support

Anatol (DevExpress)

created 10 years ago (modified 10 years ago)

Hello Ken,

Enums' images were shown in previous versions by custom group content templates. Starting from version 14.2, we are using data-specific column types instead of custom templates for performance reasons (see UI.Web - Links to referenced objects are not shown in grid columns in version 14.2). So, templates are not used for group rows. To enable the previous behavior, set the ASPxGridListEditor.EnableGroupTemplate property to true and tell XAF to create data item templates for enumeration properties by handling the ASPxGridListEditor.CreateCustomDataItemTemplate event, as shown below:

C#
public class ViewController1 : ViewController<ListView> {  
    ASPxGridListEditor gridListEditor;  
    protected override void OnActivated() {  
        base.OnActivated();  
        gridListEditor = View.Editor as ASPxGridListEditor;  
        if (gridListEditor != null) {  
            gridListEditor.CreateCustomDataItemTemplate += gridListEditor_CreateCustomDataItemTemplate;  
            gridListEditor.EnableGroupTemplate = true;  
        }  
    }  
    void gridListEditor_CreateCustomDataItemTemplate(object sender, CreateCustomDataItemTemplateEventArgs e) {  
        if (e.ModelColumn.ModelMember.Type.IsEnum) {  
            e.CreateDefaultDataItemTemplate = true;  
        }  
    }  
    protected override void OnDeactivated() {  
        base.OnDeactivated();  
        if (gridListEditor != null) {  
            gridListEditor.CreateCustomDataItemTemplate -= gridListEditor_CreateCustomDataItemTemplate;  
            gridListEditor = null;  
        }  
    }  
}

Comments (3)

Anatol (DevExpress) 10 years ago

May I make the ticket public to make it available for other customers?

Ken Grant 10 years ago

Hi Anatol,
Thank you for the swift and correct answer - Another reason I'll be renewing be subscription shortly.
Please go ahead and make this public if you consider it of interest to others. Here is the VB code I used:
Public Class ViewController1
Inherits ViewController(Of ListView)
Private gridListEditor As ASPxGridListEditor
Protected Overrides Sub OnActivated()
MyBase.OnActivated()
gridListEditor = TryCast(View.Editor, ASPxGridListEditor)
If gridListEditor IsNot Nothing Then
AddHandler gridListEditor.CreateCustomDataItemTemplate, AddressOf gridListEditor_CreateCustomDataItemTemplate
gridListEditor.EnableGroupTemplate = True
End If
End Sub
Private Sub gridListEditor_CreateCustomDataItemTemplate(sender As Object, e As CreateCustomDataItemTemplateEventArgs)
If e.ModelColumn.ModelMember.Type.IsEnum Then
e.CreateDefaultDataItemTemplate = True
End If
End Sub
Protected Overrides Sub OnDeactivated()
MyBase.OnDeactivated()
If gridListEditor IsNot Nothing Then
RemoveHandler gridListEditor.CreateCustomDataItemTemplate, AddressOf
gridListEditor_CreateCustomDataItemTemplate
gridListEditor = Nothing
End If
End Sub
End Class
Ken

Anatol (DevExpress) 10 years ago

You are welcome!

ASPXGridListEditor - Group rows show plain text in version 14.2

Answers approved by DevExpress Support

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