问题描述
我使用 R 中的 Rhandsontable 包创建了一个闪亮的表。我可以使用下面的代码下载 csv 中的表,但是,我希望以这样一种方式创建一个功能,即输入验证和复选框保留用户也可以在下载的文件中使用。可以在闪亮的情况下做到这一点吗?
library(rhandsontable)
library(shiny)
ui <- fluidPage(
titlePanel("Handsontable"),sidebarLayout(
sidebarPanel(
helpText("Handsontable demo output. Column add/delete does work ","for tables with defined column properties,including type."),radioButtons("useType","Use Data Types",c("TRUE","FALSE"))
),mainPanel(
rHandsontableOutput("hot",width = 350),actionButton("savefile","Save",width = '100%')
)
)
)
server <- function(input,output,session) {
# this caching step is no longer necessary
# it was left as an example
values = reactiveValues()
data = reactive({
if (!is.null(input$hot)) {
DF = hot_to_r(input$hot)
} else {
if (is.null(values[["DF"]]))
DF = data.frame(val = 1:10,bool = TRUE,big = LETTERS[1:10],small = letters[1:10],stringsAsFactors = F)
else
DF = values[["DF"]]
}
values[["DF"]] = DF
DF
})
output$hot <- renderRHandsontable({
DF = data()
if (!is.null(DF))
rhandsontable(DF,useTypes = as.logical(input$useType),stretchH = "all") %>%
hot_col(col = "big",type = "dropdown",source = LETTERS) %>%
hot_col(col = "small",type = "autocomplete",source = letters,strict = FALSE)
})
observeEvent(input$savefile,{
if (!is.null(isolate(input$hot)))
{
#Convert to R object
x <- hot_to_r(isolate(input$hot))
write.csv(x,file = '~/employee_input.csv',row.names=FALSE)
}
}
)
}
shinyApp(ui,server)
Please change the directory in "write.csv" in case the downloaded file is not located.
解决方法
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