Lektion 19: lösningsförslag

  1. // 1
  2. class ConsoleInput
  3. {
  4. public static int ReadInt()
  5. {
  6. do
  7. {
  8. Console.Write("Mata in ett heltal: ");
  9. string s = Console.ReadLine();
  10. try
  11. {
  12. int value = int.Parse(s);
  13. return value;
  14. }
  15. catch
  16. {
  17. Console.WriteLine(s + " är inte ett giltigt heltal");
  18. }
  19. } while (true);
  20. }
  22. public static double ReadDouble()
  23. {
  24. do
  25. {
  26. Console.Write("Mata in ett decimaltal: ");
  27. string s = Console.ReadLine();
  28. try
  29. {
  30. double value = double.Parse(s);
  31. return value;
  32. }
  33. catch
  34. {
  35. Console.WriteLine(s + " är inte ett giltigt decimaltal");
  36. }
  37. } while (true);
  38. }
  40. public static bool ReadBool()
  41. {
  42. do
  43. {
  44. Console.Write("Mata in ett booleskt värde: ");
  45. string s = Console.ReadLine();
  46. try
  47. {
  48. bool value = bool.Parse(s);
  49. return value;
  50. }
  51. catch
  52. {
  53. Console.WriteLine(s + " är inte ett giltigt booleskt värde");
  54. }
  55. } while (true);
  56. }
  58. public static string ReadString()
  59. {
  60. Console.Write("Mata in en sträng: ");
  61. string s = Console.ReadLine();
  62. return s;
  63. }
  64. }
  66. // 2
  67. // We use overloads to distinguish between flags with/without outer crosses; the second overload is below this one. Other variants are also possible.
  68. private TableLayoutPanel CreateNordicFlag(Color colorBackground, Color colorCross)
  69. {
  70. TableLayoutPanel flag = new TableLayoutPanel
  71. {
  72. RowCount = 3,
  73. ColumnCount = 3,
  74. Dock = DockStyle.Fill
  75. };
  76. Controls.Add(flag);
  78. flag.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 30));
  79. flag.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 10));
  80. flag.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 60));
  82. flag.RowStyles.Add(new RowStyle(SizeType.Percent, 45));
  83. flag.RowStyles.Add(new RowStyle(SizeType.Percent, 10));
  84. flag.RowStyles.Add(new RowStyle(SizeType.Percent, 45));
  86. flag.Controls.Add(CreatePanel(colorBackground));
  87. flag.Controls.Add(CreatePanel(colorCross));
  88. flag.Controls.Add(CreatePanel(colorBackground));
  89. flag.Controls.Add(CreatePanel(colorCross));
  90. flag.Controls.Add(CreatePanel(colorCross));
  91. flag.Controls.Add(CreatePanel(colorCross));
  92. flag.Controls.Add(CreatePanel(colorBackground));
  93. flag.Controls.Add(CreatePanel(colorCross));
  94. flag.Controls.Add(CreatePanel(colorBackground));
  96. return flag;
  97. }
  99. private TableLayoutPanel CreateNordicFlag(Color colorBackground, Color colorCrossOuter, Color
    100. colorCrossInner)
  100. {
  101. TableLayoutPanel flag = new TableLayoutPanel
  102. {
  103. RowCount = 5,
  104. ColumnCount = 5,
  105. Dock = DockStyle.Fill
  106. };
  107. Controls.Add(flag);
  109. flag.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 30));
  110. flag.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 5));
  111. flag.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 10));
  112. flag.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 5));
  113. flag.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 50));
  115. flag.RowStyles.Add(new RowStyle(SizeType.Percent, 40));
  116. flag.RowStyles.Add(new RowStyle(SizeType.Percent, 5));
  117. flag.RowStyles.Add(new RowStyle(SizeType.Percent, 10));
  118. flag.RowStyles.Add(new RowStyle(SizeType.Percent, 5));
  119. flag.RowStyles.Add(new RowStyle(SizeType.Percent, 40));
  121. flag.Controls.Add(CreatePanel(colorBackground));
  122. flag.Controls.Add(CreatePanel(colorCrossOuter));
  123. flag.Controls.Add(CreatePanel(colorCrossInner));
  124. flag.Controls.Add(CreatePanel(colorCrossOuter));
  125. flag.Controls.Add(CreatePanel(colorBackground));
  127. flag.Controls.Add(CreatePanel(colorCrossOuter));
  128. flag.Controls.Add(CreatePanel(colorCrossOuter));
  129. flag.Controls.Add(CreatePanel(colorCrossInner));
  130. flag.Controls.Add(CreatePanel(colorCrossOuter));
  131. flag.Controls.Add(CreatePanel(colorCrossOuter));
  133. flag.Controls.Add(CreatePanel(colorCrossInner));
  134. flag.Controls.Add(CreatePanel(colorCrossInner));
  135. flag.Controls.Add(CreatePanel(colorCrossInner));
  136. flag.Controls.Add(CreatePanel(colorCrossInner));
  137. flag.Controls.Add(CreatePanel(colorCrossInner));
  139. flag.Controls.Add(CreatePanel(colorCrossOuter));
  140. flag.Controls.Add(CreatePanel(colorCrossOuter));
  141. flag.Controls.Add(CreatePanel(colorCrossInner));
  142. flag.Controls.Add(CreatePanel(colorCrossOuter));
  143. flag.Controls.Add(CreatePanel(colorCrossOuter));
  145. flag.Controls.Add(CreatePanel(colorBackground));
  146. flag.Controls.Add(CreatePanel(colorCrossOuter));
  147. flag.Controls.Add(CreatePanel(colorCrossInner));
  148. flag.Controls.Add(CreatePanel(colorCrossOuter));
  149. flag.Controls.Add(CreatePanel(colorBackground));
  151. return flag;
  152. }
  154. // A helper method to make the code in the other methods more concise.
  155. private Panel CreatePanel(Color color) {
  156. return new Panel
  157. {
  158. BackColor = color,
  159. Dock = DockStyle.Fill,
  160. Margin = new Padding(0)
  161. };
  162. }
  164. // 3
  165. private TableLayoutPanel CreateTextBoxForm(string[] labels)
  166. {
  167. TableLayoutPanel panel = new TableLayoutPanel
  168. {
  169. ColumnCount = 2,
  170. RowCount = labels.Length,
  171. Dock = DockStyle.Fill
  172. };
  174. foreach (string label in labels)
  175. {
  176. panel.Controls.Add(new Label { Text = label });
  177. panel.Controls.Add(new TextBox());
  178. }
  180. return panel;
  181. }