Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WebForms / System / Web / UI / Design / WebControls / ObjectDesignerDataSourceView.cs / 1 / ObjectDesignerDataSourceView.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.Design.WebControls { using System; using System.Collections; using System.Data; using System.Web.UI.WebControls; ////// ObjectDesignerDataSourceView is the designer view associated with a ObjectDataSourceDesigner. /// [System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand, Flags = System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)] public class ObjectDesignerDataSourceView : DesignerDataSourceView { private ObjectDataSourceDesigner _owner; public ObjectDesignerDataSourceView(ObjectDataSourceDesigner owner, string viewName) : base(owner, viewName) { _owner = owner; } public override bool CanDelete { get { return (_owner.ObjectDataSource.DeleteMethod.Length > 0); } } public override bool CanInsert { get { return (_owner.ObjectDataSource.InsertMethod.Length > 0); } } public override bool CanPage { get { return _owner.ObjectDataSource.EnablePaging; } } public override bool CanRetrieveTotalRowCount { get { return (_owner.ObjectDataSource.SelectCountMethod.Length > 0); } } public override bool CanSort { get { // We can sort if either the business object can do custom sorting, // or the return type of the select method is one of a few known types. if (_owner.ObjectDataSource.SortParameterName.Length > 0) { return true; } Type selectMethodReturnType = _owner.SelectMethodReturnType; return ((selectMethodReturnType != null) && (typeof(DataSet).IsAssignableFrom(selectMethodReturnType) || typeof(DataTable).IsAssignableFrom(selectMethodReturnType) || typeof(DataView).IsAssignableFrom(selectMethodReturnType))); } } public override bool CanUpdate { get { return (_owner.ObjectDataSource.UpdateMethod.Length > 0); } } public override IDataSourceViewSchema Schema { get { // Extract the serialized data from DesignerState DataTable[] schemaTables = _owner.LoadSchema(); if ((schemaTables != null) && (schemaTables.Length > 0)) { if (Name.Length == 0) { return new DataSetViewSchema(schemaTables[0]); } foreach (DataTable dataTable in schemaTables) { if (String.Equals(dataTable.TableName, Name, StringComparison.OrdinalIgnoreCase)) { return new DataSetViewSchema(dataTable); } } } return null; } } public override IEnumerable GetDesignTimeData(int minimumRows, out bool isSampleData) { isSampleData = true; DataTable[] schemaTables = _owner.LoadSchema(); if ((schemaTables != null) && (schemaTables.Length > 0)) { if (Name.Length == 0) { // View name was not specified, just get the first (default) table and create dummy data return DesignTimeData.GetDesignTimeDataSource(DesignTimeData.CreateSampleDataTable(new DataView(schemaTables[0]), true), minimumRows); } // Try to find the requested table by name (case-insensitive) foreach (DataTable dataTable in schemaTables) { if (String.Equals(dataTable.TableName, Name, StringComparison.OrdinalIgnoreCase)) { // Found the table, create some dummy data return DesignTimeData.GetDesignTimeDataSource(DesignTimeData.CreateSampleDataTable(new DataView(dataTable), true), minimumRows); } } } // Couldn't find design-time schema, use base implementation return base.GetDesignTimeData(minimumRows, out isSampleData); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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