ObjectDataSourceValidationService Class

Default service that validates the ObjectDataSource data sources before using them in the document.

Namespace: DevExpress.XtraSpreadsheet.Services

Assembly: DevExpress.XtraSpreadsheet.v20.1.dll

Declaration

public class ObjectDataSourceValidationService :
    IObjectDataSourceValidationService
Public Class ObjectDataSourceValidationService
    Implements IObjectDataSourceValidationService

Remarks

The ObjectDataSource can cause an undesired behavior when retrieving its data. This may be unacceptable in certain situations. You can use the SpreadsheetControlOptions.DataSourceOptions option to specify whether to prohibit the ObjectDataSource data retrieval, prompt the user or silently load the data. To prompt the user, the WinForms SpreadsheetControl calls the ObjectDataSourceValidationService.Validate method of the default service. However, you can implement your own IObjectDataSourceValidationService service and replace the default service. A custom service can be also registered for the non-visual Workbook instance, which has no default service.

Examples

using DevExpress.DataAccess.ObjectBinding;
using DevExpress.XtraSpreadsheet.Services;
            if (barCheckCustomValidationService.Checked) {
                spreadsheetControl1.ReplaceService<IObjectDataSourceValidationService>(new MyObjectDataSourceValidationService());
            }
            else {
                spreadsheetControl1.ReplaceService<IObjectDataSourceValidationService>(new ObjectDataSourceValidationService(spreadsheetControl1));
            }
    public class MyObjectDataSourceValidationService : IObjectDataSourceValidationService {
        public void Validate(IEnumerable<ObjectDataSource> dataSources) {
            // Do nothing to allow loading.
            // Clear the DataSource and DataMember properties to prohibit loading.
            foreach (ObjectDataSource ds in dataSources) {
                ds.DataSource = null;
                ds.DataMember = null;
            };
        }
    }

Inheritance

Object
ObjectDataSourceValidationService
See Also