回答編集履歴
2
FastMemberの説明を追記
answer
CHANGED
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@@ -5,6 +5,7 @@
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5
5
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// 今回はリフレクションにFastMemberを使います。
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6
6
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// リフレクションは遅いため、何等かの方法でキャッシュしておくことが望ましいです
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7
7
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// とりあえず既成の外部クラスを使います。nuget からFastMemberを探して使ってみてください。
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8
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// FastMemberはクラスのアクセサ/ゲッタを生成してキャッシュしてくれるライブラリです。
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8
9
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IEnumerable<string> AsEnumerable()
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10
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{
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11
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var accessor = TypeAccessor.Create(typeof(/*型*/));
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1
オマケを追加
answer
CHANGED
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@@ -72,4 +72,127 @@
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72
72
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}
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}
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}
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75
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```
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76
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77
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78
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79
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---
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80
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追記
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81
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オマケ。コピペで使える全文です。
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82
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+
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83
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リフレクション
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84
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```C#
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85
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using FastMember;
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86
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using System;
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87
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using System.Collections.Generic;
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88
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89
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class Program
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90
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{
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91
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static void Main(string[] args)
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92
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{
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93
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var sample = new ReflectionSample();
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94
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foreach (var str in sample.AsEnumerable())
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95
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{
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96
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Console.WriteLine(str);
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97
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}
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98
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99
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Console.ReadKey();
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100
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}
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101
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}
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102
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103
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public class ReflectionSample
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104
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{
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105
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public string a1 = "AAA";
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106
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public string a2 = "BBB";
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107
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public string a3 = "CCC";
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108
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}
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109
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+
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110
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public static class ReflectionSampleExtension
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111
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{
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112
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public static IEnumerable<string> AsEnumerable(this ReflectionSample obj)
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113
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{
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114
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var accessor = TypeAccessor.Create(typeof(ReflectionSample));
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115
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for (int i = 1; i < 3; ++i)
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116
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{
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117
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yield return (string)accessor[obj, $"a{i}"];
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118
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}
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119
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}
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120
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}
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121
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```
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122
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123
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直書き
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124
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```C#
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125
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using System;
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126
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using System.Collections.Generic;
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127
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128
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class Program
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129
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{
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130
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static void Main(string[] args)
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131
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{
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132
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var sample = new Sample();
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133
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foreach (var str in sample.AsEnumerable愚直1())
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134
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{
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135
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Console.WriteLine(str);
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136
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}
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137
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foreach (var str in sample.AsEnumerable愚直2())
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138
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{
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139
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Console.WriteLine(str);
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140
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}
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141
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142
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Console.ReadKey();
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143
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}
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144
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}
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145
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+
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146
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public class Sample
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147
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{
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148
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public string a1 = "AAA";
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149
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public string a2 = "BBB";
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150
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public string a3 = "CCC";
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151
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152
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// 愚直1
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153
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public IEnumerable<string> AsEnumerable愚直1()
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154
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{
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155
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yield return a1;
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156
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yield return a2;
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157
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yield return a3;
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158
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}
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159
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160
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public string this[int index]
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161
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{
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162
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get
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163
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{
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164
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switch (index)
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165
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{
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166
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case 0: return a1;
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167
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case 1: return a2;
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168
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case 2: return a3;
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169
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// ....
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170
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// case 98: return a99;
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171
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default:
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172
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throw new IndexOutOfRangeException();
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173
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}
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174
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}
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175
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set
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176
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{
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177
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+
switch (index)
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178
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{
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179
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case 0: a1 = value; break;
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180
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case 1: a2 = value; break;
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181
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+
case 2: a3 = value; break;
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182
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+
// ....
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183
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+
// case 98: a99 = value; break;
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184
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default:
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185
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throw new IndexOutOfRangeException();
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186
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+
}
|
|
187
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+
}
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188
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+
}
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189
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+
|
|
190
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+
public IEnumerable<string> AsEnumerable愚直2()
|
|
191
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+
{
|
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192
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+
for (int i = 0; i < 3; ++i)
|
|
193
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+
{
|
|
194
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+
yield return this[i];
|
|
195
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+
}
|
|
196
|
+
}
|
|
197
|
+
}
|
|
75
198
|
```
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