我想用"Browse Option"上传一个文件，然后我想用"Worklist No"自动填充表(意思是：选择一个输入应该自动填充REST字段)值和REST列应该是自动填充的。但我收到了一些错误。 基于工作列表否我的其他数据应该填充在闪亮仪表板的不同输入框中。

[![enter image description here][1]][1]library(shiny)
library(shinydashboard)

ui <- dashboardPage(
  dashboardHeader(title = "Basic dashboard"),
  dashboardSidebar(),
  dashboardBody(
    fluidRow(
      fileInput("file_upload","Uplaod Data",buttonLabel = "Browse..",placeholder = "No file Selected")
    ),
    fluidRow(
      column(3,
             uiOutput("p1_ui")
      ),
      column(3,
             uiOutput("p2_ui")
      ),
      column(3,
             uiOutput("p3_ui")
      )
    ),
    fluidRow(
      column(6,
             h3("Uploaded DATA"),
             DTOutput("uploaded_data_table")
      ),
      column(6,
             h3("Selected DATA"),
             DTOutput("selected_data_table")
      )
    )
  )
)

server <- function(input, output,session) {
  values <- reactiveValues(
    upload_state = NULL
  )
  data_upload_fun<-eventReactive(input$file_upload,{
    req(input$file_upload)
    if(values$upload_state=='reset'||is.null(values$upload_state))
    {
      data_in<-read_xlsx(input$file_upload$datapath
                    )
      values$upload_state <- 'uploaded'
      data_in
    }  
  })
  output$uploaded_data_table <- renderDT({
    DT::datatable(data_upload_fun())
  })
  output$p1_ui<-renderUI({
    if(is.null(values$upload_state)|| values$upload_state=='reset')
    {
      selectInput("p1", choices = NULL, label = 'WorklistNo')
   } 
    else
    {
      data_upload_fun()
      selectInput("p1", choices = uploade_data$WorklistNo, label = 'WorklistNo')
    }
  })

  output$p2_ui<-renderUI({
    if(is.null(values$upload_state)|| values$upload_state=='reset')
    {
      selectInput("p2", choices = NULL, label = 'Status')
    }
    else
    {
      data_upload_fun()
      status<-data_in[data_in$WorklistNo==input$p1,2]
      selectInput("p2", choices = as.list(status), label = 'Status')
    }
  })
  output$p3_ui<-renderUI({
    if(is.null(values$upload_state)|| values$upload_state=='reset')
    {
      selectInput("p3", choices = NULL, label = 'Plant')
    }
    else
    {
      data_upload_fun()
      plant<-data_in[data_in$WorklistNo==input$p1 & data_in$Status==input$p2,3]
      selectInput("p3", choices = as.list(plant), label = 'Plant')
    }
  })

  output$selected_data_table<-renderDT({
    if(is.null(values$upload_state)|| values$upload_state=='reset')
    {
      returnValue()
    }
    else
    {
      data_upload_fun()
      data_to_show<-data_in[data_in$WorklistNo==input$p1 & data_in$Status==input$p2 & data_in$Plant== input$p3, ]
      DT::datatable(data_to_show)
    }
  })

}

shinyApp(ui, server) 

推荐答案

从previous question看起来您想要被动地执行此操作。您需要了解闪亮的反应性组件行为的概念。

但是，有几点需要突出显示。

我认为您正在上载静态的Excel文件。因此，您需要根据您的EXCEL修改代码。我的代码是基于我的Excel运行的。因此，要使其正常工作，您需要进行相应的更改。

但是，即使您想要处理数据，也需要提供最小的可重现代码，然后请提供最小的数据集。

使用相同数据集(.xlsx文件)的修订代码

library(shinydashboard)
library(DT)
library(xlsx)

ui <- dashboardPage(
  dashboardHeader(title = "Basic dashboard"),
  dashboardSidebar(),
  dashboardBody(
    fluidRow(
      fileInput("file_upload","Uplaod Data",buttonLabel = "Browse..",placeholder = "No file Selected")
    ),
    fluidRow(
      column(3,
             uiOutput("p1_ui")
      ),
      column(3,
             uiOutput("p2_ui")
      ),
      column(3,
             uiOutput("p3_ui")
      )
    ),
    fluidRow(
      column(6,
             h3("Uploaded DATA"),
             DTOutput("uploaded_data_table")
      ),
      column(6,
             h3("Selected DATA"),
             DTOutput("selected_data_table")
      )
    )
  )
)

server <- function(input, output,session) {
  values <- reactiveValues(
    upload_state = NULL
  )
  data_upload_fun<-eventReactive(input$file_upload,{
    req(input$file_upload)
    if(values$upload_state=='reset'||is.null(values$upload_state))
    {
      data_in<<-read.xlsx(input$file_upload$datapath,1)
      values$upload_state <- 'uploaded'
      data_in
    }  
  })


  output$uploaded_data_table <- renderDT({
    DT::datatable(data_upload_fun())
  })
  output$p1_ui<-renderUI({
    if(is.null(values$upload_state)|| values$upload_state=='reset')
    {
      selectInput("p1", choices = NULL, label = 'WorklistNo')
    } 
    else
    {
      data_upload_fun()
      selectInput("p1", choices = data_in$WLID, label = 'WorklistNo')
    }
  })

  output$p2_ui<-renderUI({
    if(is.null(values$upload_state)|| values$upload_state=='reset')
    {
      selectInput("p2", choices = NULL, label = 'Status')
    }
    else
    {
      data_upload_fun()
      status<-data_in[data_in$WLID==input$p1,3]
      selectInput("p2", choices = as.list(status), label = 'Status')
    }
  })
  output$p3_ui<-renderUI({
    if(is.null(values$upload_state)|| values$upload_state=='reset')
    {
      selectInput("p3", choices = NULL, label = 'Plant')
    }
    else
    {
      data_upload_fun()
      plant<-data_in[data_in$WLID==input$p1 & data_in$STATUS==input$p2,2]
      selectInput("p3", choices = as.list(plant), label = 'Plant')
    }
  })

  output$selected_data_table<-renderDT({
    if(is.null(values$upload_state)|| values$upload_state=='reset')
    {
      returnValue()
    }
    else
    {
      data_upload_fun()
      data_to_show<-data_in[data_in$WLID==input$p1 & data_in$STATUS==input$p2 & data_in$PLANT== input$p3, ]
      DT::datatable(data_to_show)
    }
  })

}

shinyApp(ui, server) 

希望这能有所帮助...