# RequestFormat `Get|Let {WebFormat}` 设置用于将响应`Body`转换为字符串和`Content-Type`标头的格式 >[danger]如果使用`WebFormat.Custom`，则必须设置[`CustomRequestFormat`](CustomRequestFormat.md) ~~~ Dim Request As New WebRequest Request.Body = Array("A", "B", "C") Request.RequestFormat = WebFormat.Json '// -> Content-Type: application/json '// -> Convert Body to JSON string Request.Body '// = "["A","B","C"]" ~~~