问题描述
我能够从AD环境中生成最近一次登录的用户列表,并将其显示在视图中。但是,如果我想使用CsvHelper软件包将其导出到CSV,则会收到“没有给定与HomeController.GetLastLogon(int)的所需形式参数'txt_filterDays”相对应的参数。
如果我注释掉方法“ DownloadCSV()”,则它可以按预期工作,并且可以使用视图中的输入字段来更改日期。
查看摘录
<form action="GetMostRecentLastLogons" method="post" class="form-inline ml-3">
<div class="input-group input-group-sm">
<input class="form-control form-control-navbar" type="text" name="txt_filterDays" placeholder="Days for Last Login">
</div>
</form>
控制器摘录
public ActionResult GetMostRecentLastLogons(int txt_filterDays = 90)
{
List<LastLogons> MostRecentLastLogons = GetLastLogon(txt_filterDays);
return View(MostRecentLastLogons);
}
public static List<LastLogons> GetLastLogon(int txt_filterDays)
{
...
MostRecentLogonList = MostRecentLogonList
.Where(x => x.lastLogon >= CurrentDate.AddDays(-txt_filterDays))
.GroupBy(x => x.SAMAccountName)
.Select(scope => scope.OrderBy(x => x.lastLogonServer).Last()).ToList();
}
public FileStreamResult DownloadCSV()
{
var result = WriteCsvToMemory(GetLastLogon());
var memoryStream = new MemoryStream(result);
return new FileStreamResult(memoryStream,"text/csv") { FileDownloadName = "report.csv" };
}
public byte[] WriteCsvToMemory(List<LastLogons> MostRecentLogonList)
{
using (var memoryStream = new MemoryStream())
using (var streamWriter = new StreamWriter(memoryStream))
using (var csvWriter = new CsvWriter(streamWriter,System.Globalization.CultureInfo.CurrentCulture))
{
csvWriter.Configuration.RegisterClassMap<LastLogonsMap>();
csvWriter.WriteRecords(MostRecentLogonList);
streamWriter.Flush();
return memoryStream.ToArray();
}
}
下面一行中的“ GetLastLogon()”是错误所在。我假设正在发生这种情况,因为在“ GetLastLogon()”方法中没有“ txt_filterDays”参数吗?
var result = WriteCsvToMemory(GetLastLogon());
如果我尝试将“ txt_filterDays”添加到:
var result = WriteCsvToMemory(GetLastLogon(txt_filterDays));
然后错误提示:当前上下文中不存在名称'txt_filterDays'
仅当我在“ public ActionResult GetMostRecentLastLogons(int txt_filterDays = 90)”上取出参数“ int txt_filterDays = 90”时,“ DownloadCSV()”才有效,然后它会毫无问题地转储到CSV中,使更改日期的功能变得毫无用处。
我一直在寻找此错误,并在StackOverflow上多次发现此错误,但是解决方案针对的是与我不同的逻辑,这对我来说很混乱。
请让我知道如何使此工作接受“ var result = WriteCsvToMemory(GetLastLogon());”内的“ txt_filterDays”参数。线。
谢谢
解决方法
函数的定义是:
public static List<LastLogons> GetLastLogon(int txt_filterDays)
因此,要调用它,您需要像定义一样传递一个整数值:
//123 here is just an example,apply any integer value on your argument here:
GetLastLogon(123);
在上面的代码中不这样:
//What is the integer value that you pass here on GetLastLogon?
var result = WriteCsvToMemory(GetLastLogon());
因此,按照我在上面第一行代码中所指定的那样,以GetLastLogon
作为integer
来调用argument
。