質問編集履歴
1
問題発生時のコードを追加
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -39,3 +39,79 @@
|
|
|
39
39
|
|
|
40
40
|
|
|
41
41
|
Visual Studio 2019 / .Net 4.7.2 を利用しています。
|
|
42
|
+
|
|
43
|
+
|
|
44
|
+
|
|
45
|
+
```ここに言語を入力
|
|
46
|
+
|
|
47
|
+
DB2Connection con;
|
|
48
|
+
|
|
49
|
+
DB2DataReader reader = null;
|
|
50
|
+
|
|
51
|
+
private async void ButtonSelectAsync_Click(object sender, EventArgs e)
|
|
52
|
+
|
|
53
|
+
{
|
|
54
|
+
|
|
55
|
+
using (var cmd = con.CreateCommand())
|
|
56
|
+
|
|
57
|
+
{
|
|
58
|
+
|
|
59
|
+
cmd.CommandText = "SELECT文(省略)";
|
|
60
|
+
|
|
61
|
+
try
|
|
62
|
+
|
|
63
|
+
{
|
|
64
|
+
|
|
65
|
+
reader = await DB2ExecuteReaderAsync(cmd);
|
|
66
|
+
|
|
67
|
+
DataReaderを参照し画面に出す処理をここに書く();
|
|
68
|
+
|
|
69
|
+
}
|
|
70
|
+
|
|
71
|
+
catch (Exception ex)
|
|
72
|
+
|
|
73
|
+
{
|
|
74
|
+
|
|
75
|
+
MessageBox.Show(ex.Message);
|
|
76
|
+
|
|
77
|
+
}
|
|
78
|
+
|
|
79
|
+
}
|
|
80
|
+
|
|
81
|
+
}
|
|
82
|
+
|
|
83
|
+
|
|
84
|
+
|
|
85
|
+
private static async Task<DB2DataReader> DB2ExecuteReaderAsync(DB2Command cmd)
|
|
86
|
+
|
|
87
|
+
{
|
|
88
|
+
|
|
89
|
+
try
|
|
90
|
+
|
|
91
|
+
{
|
|
92
|
+
|
|
93
|
+
//非同期でSQLを実行
|
|
94
|
+
|
|
95
|
+
DB2DataReader readerAsync = null;
|
|
96
|
+
|
|
97
|
+
readerAsync = (DB2DataReader)await cmd.ExecuteReaderAsync;
|
|
98
|
+
|
|
99
|
+
return readerAsync;
|
|
100
|
+
|
|
101
|
+
}
|
|
102
|
+
|
|
103
|
+
catch (Exception ex)
|
|
104
|
+
|
|
105
|
+
{
|
|
106
|
+
|
|
107
|
+
MessageBox.Show(ex.Message);
|
|
108
|
+
|
|
109
|
+
return null;
|
|
110
|
+
|
|
111
|
+
}
|
|
112
|
+
|
|
113
|
+
}
|
|
114
|
+
|
|
115
|
+
|
|
116
|
+
|
|
117
|
+
```
|