C＃到VB.net-2维数组的语法问题

debugcn 发表于 Dev

拉达斯达

您能告诉我以下代码有什么问题吗，我正在 Value of type '2-dimensional array of String' cannot be converted to 'System.Collections.Generic.Dictionary(Of String, String)'

VB.net代码：

MyBase.SetConfig(New EndpointHostConfig() With {
              .GlobalResponseHeaders = {
             {"Access-Control-Allow-Origin", "*"},
             {"Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS"},
             {"Access-Control-Allow-Headers", "Content-Type"}
              }
            })

这是我用作起点的C＃代码：

base.SetConfig(new EndpointHostConfig
    {
        GlobalResponseHeaders = {
            { "Access-Control-Allow-Origin", "*" },
            { "Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS" },
            { "Access-Control-Allow-Headers", "Content-Type" },
        },
    });

任何建议，不胜感激

以下工作正常：

Dim CorsHeaders As New Dictionary(Of String, String)
            CorsHeaders.Add("Access-Control-Allow-Origin", "*")
            CorsHeaders.Add("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
            CorsHeaders.Add("Access-Control-Allow-Headers", "Content-Type")

            MyBase.SetConfig(New EndpointHostConfig() With {
               .GlobalResponseHeaders = CorsHeaders
            })

基思

您需要使用From关键字调用Dictionary构造函数：

MyBase.SetConfig(New EndpointHostConfig() With {
   .GlobalResponseHeaders = New Dictionary(Of String, String) From {
      {"Access-Control-Allow-Origin", "*"},
      {"Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS"},
      {"Access-Control-Allow-Headers", "Content-Type"}
   }
})

请参见Collection Initializers（Visual Basic）。

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