DataSourceCollection.cs 2.6 KB

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  1. using FastReport.Utils;
  2. using System.Collections;
  3. namespace FastReport.Data
  4. {
  5. /// <summary>
  6. /// Represents the collection of <see cref="DataSourceBase"/> objects.
  7. /// </summary>
  8. public class DataSourceCollection : FRCollectionBase
  9. {
  10. /// <summary>
  11. /// Gets or sets a data source.
  12. /// </summary>
  13. /// <param name="index">The index of a data source in this collection.</param>
  14. /// <returns>The data source with specified index.</returns>
  15. public DataSourceBase this[int index]
  16. {
  17. get { return List[index] as DataSourceBase; }
  18. set { List[index] = value; }
  19. }
  20. /// <summary>
  21. /// Finds a datasource by its name.
  22. /// </summary>
  23. /// <param name="name">The name of a datasource.</param>
  24. /// <returns>The <see cref="DataSourceBase"/> object if found; otherwise <b>null</b>.</returns>
  25. public DataSourceBase FindByName(string name)
  26. {
  27. foreach (DataSourceBase c in this)
  28. {
  29. if (c.Name == name)
  30. return c;
  31. }
  32. return null;
  33. }
  34. /// <summary>
  35. /// Finds a datasource by its alias.
  36. /// </summary>
  37. /// <param name="alias">The alias of a datasource.</param>
  38. /// <returns>The <see cref="DataSourceBase"/> object if found; otherwise <b>null</b>.</returns>
  39. public DataSourceBase FindByAlias(string alias)
  40. {
  41. foreach (DataSourceBase c in this)
  42. {
  43. if (c.Alias == alias)
  44. return c;
  45. }
  46. return null;
  47. }
  48. /// <summary>
  49. /// Sorts data sources by their names.
  50. /// </summary>
  51. public void Sort()
  52. {
  53. InnerList.Sort(new DataSourceComparer());
  54. }
  55. /// <summary>
  56. /// Initializes a new instance of the <see cref="DataSourceCollection"/> class with default settings.
  57. /// </summary>
  58. /// <param name="owner">The owner of this collection.</param>
  59. public DataSourceCollection(Base owner) : base(owner)
  60. {
  61. }
  62. }
  63. /// <summary>
  64. /// Represents the comparer class that used for sorting the collection of data sources.
  65. /// </summary>
  66. public class DataSourceComparer : IComparer
  67. {
  68. /// <inheritdoc/>
  69. public int Compare(object x, object y)
  70. {
  71. string xValue = (x as DataSourceBase).Alias;
  72. string yValue = (y as DataSourceBase).Alias;
  73. return xValue.CompareTo(yValue);
  74. }
  75. }
  76. }