选择投影中的索引 [英] Index in the Select projection
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问题描述
在执行以下操作时,我希望索引从大于0的数字开始:
I would like my index to start from a number count greater than 0 while doing something like this:
var dataSource = WebConfigurationHelper.GetSupportedDomainsString().Select((domain, index) =>
new { index , Name = domain });
所以我的输出变为:
index=2 domain=zombieland
index=3 domain=mydomain
有可能吗?
推荐答案
您可以在选择"投影中对其进行调整:
You can adjust it in the Select projection:
var dataSource = WebConfigurationHelper.GetSupportedDomainsString()
.Select((domain, index) => new { Index = index + 2, Name = domain });
我最初对new { index + 2, Name = domain }
的建议不起作用的原因是 projection initializer (您只指定一个表达式,然后让编译器推断名称)仅在该表达式为简单名称",成员访问权限"或基本访问权限".
The reason my original suggestion of new { index + 2, Name = domain }
wouldn't work is that a projection initializer (where you specify just an expression, and let the compiler infer the name) only works when the expression is a "simple name", a "member access" or a "base access".
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