mcs/class/referencesource/System.Web.Entity.Design/System/Data/WebControls/Design/EntityDesignerDataSourceView.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="EntityDesignerDataSourceView.cs" company="Microsoft">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 //
   6 // @owner       [....]
   7 // @backupOwner [....]
   8 //------------------------------------------------------------------------------
   9 using System.Collections;
  10 using System.Data;
  11 using System.Web.UI.Design;
  12
  13 namespace System.Web.UI.Design.WebControls
  14 {
  15     public class EntityDesignerDataSourceView : DesignerDataSourceView
  16     {
  17         private EntityDataSourceDesignerHelper _helper;
  18
  19         public EntityDesignerDataSourceView(EntityDataSourceDesigner owner)
  20             : base(owner, EntityDataSourceDesignerHelper.DefaultViewName)
  21         {
  22             _helper = owner.Helper;
  23         }
  24
  25         public override bool CanDelete
  26         {
  27             get
  28             {
  29                 return CanModify && _helper.EnableDelete;
  30             }
  31         }
  32
  33         public override bool CanInsert
  34         {
  35             get
  36             {
  37                 return CanModify && _helper.EnableInsert;
  38             }
  39         }
  40
  41         internal bool CanModify
  42         {
  43             get
  44             {
  45                 return !String.IsNullOrEmpty(_helper.EntitySetName) &&
  46                     String.IsNullOrEmpty(_helper.Select) &&
  47                     String.IsNullOrEmpty(_helper.CommandText) &&
  48                     String.IsNullOrEmpty(_helper.GroupBy);
  49             }
  50         }
  51
  52         public override bool CanPage
  53         {
  54             get
  55             {
  56                 return _helper.CanPage;
  57             }
  58         }
  59
  60         public override bool CanSort
  61         {
  62             get
  63             {
  64                 return _helper.CanSort;
  65             }
  66         }
  67
  68         public override bool CanUpdate
  69         {
  70             get
  71             {
  72                 return CanModify && _helper.EnableUpdate;
  73             }
  74         }
  75
  76         public override IDataSourceViewSchema Schema
  77         {
  78             get
  79             {
  80                 DataTable schemaTable = _helper.LoadSchema();
  81                 if (schemaTable == null)
  82                 {
  83                     return null;
  84                 }
  85                 return new DataSetViewSchema(schemaTable);
  86             }
  87         }
  88
  89         public override IEnumerable GetDesignTimeData(int minimumRows, out bool isSampleData)
  90         {
  91             DataTable schemaTable = _helper.LoadSchema();
  92             if (schemaTable != null)
  93             {
  94                 isSampleData = true;
  95                 return DesignTimeData.GetDesignTimeDataSource(DesignTimeData.CreateSampleDataTable(new DataView(schemaTable), true), minimumRows);
  96             }
  97
  98             // Couldn't find design-time schema, use base implementation
  99             return base.GetDesignTimeData(minimumRows, out isSampleData);
 100         }
 101     }
 102 }