Accessing the Report Preview Model in LightSwitch
In this blog post I will explain another small feature of XtraReports for LightSwitch: the ability to access the ReportPreviewModel from code. For example, I will show how you can provide custom editors for report parameters in a LightSwitch application.
Starting with our next minor release, in addition to the capability of passing parameters from LightSwitch queries to reports, …
… we have also added a new CustomizeReportPreviewModel method, which can be specifically used for accessing the ReportPreviewModel.
The above code is generated automatically in a ReportPreviewScreen's code behind. You should not rename this method or modify its type and visibility scope (public void).
Now, let’s use a ComboBoxEdit (which is part of our DevExpress Editors for Silverlight) as a custom parameter editor.
using System.Collections.Generic;
using DevExpress.Xpf.Editors;
using DevExpress.Xpf.Printing;
// ...
namespace LightSwitchApplication {
public partial class ReportPreviewScreen {
public void CustomizeReportPreviewModel(ReportPreviewModel model) {
model.CustomizeParameterEditors += model_CustomizeParameterEditors;
}
List<object> categories;
void model_CustomizeParameterEditors(object sender, CustomizeParameterEditorsEventArgs e) {
if (e.Parameter.Name == "CategoryName") {
var editor = new ComboBoxEdit();
editor.ItemsSource = categories;
editor.IsTextEditable = false;
e.Editor = editor;
e.BoundDataMember = "EditValue";
}
}
partial void ReportPreviewScreen_Activated() {
this.ReportTypeName = "XtraReport1";
categories = new List<object>();
foreach (Category category in new DataWorkspace().NorthWindData.Categories) {
categories.Add(category.CategoryName);
}
}
}
}
Here is the result!
Please feel free to leave your comments below.
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The DevExpress Team