Question

是否可以按名称或索引选择列，这些列存储在数组中？

String[] columnsWhichINeed = new String[] { "column1", "column2" };

DataColumn[] aCols = dataTable.Columns.Cast<DataColumn>()
          .Where(c => c.ColumnName.NEEDSOMEMAGICHERE;
          .Select(c => new DataColumn(c.ColumnName, c.DataType))
          .ToArray();

Answer 1

您可以使用{/ 1}}方法，例如

Contains()

Answer 2

我认为您正在寻找的是<body> <iframe style="max-width: 480px" width="100%" height="360" src="http://www.youtube.com/embed?max-results=1&controls=0&showinfo=0&rel=0&listType=user_uploads&list=UCvDJ_vg2dics1kmwUPnTo_A" frameborder="0" allowfullscreen></iframe> </body>：

Contains()

除非你需要进行不区分大小写的字符串匹配，在这种情况下你需要DataColumn[] aCols = dataTable.Columns.Cast<DataColumn>() .Where(c => columnsWhichINeed.Contains(c.ColumnName)) .Select(c => new DataColumn(c.ColumnName, c.DataType)) .ToArray();：

Any()

LINQ C＃按数组中的名称选择多个列

2 个答案: