C# 如何将数据库中的多个数据存储在同一文本框中？C

您好，谢谢查看我的问题！我在从数据库中获取多个数据时遇到了一些问题。我试图在一个文本框中显示多个数据，当然，它不允许我这样做

我的代码：

第一预设；获取它找到的第一个数据，但我需要所有数据。我将如何制作它，以便它将显示多个数据而不是一个？谢谢大家

e、 g.文本框：

您的假期请求+getrecordd.Datefrom+-+getrecordd.Dateto+已发送。正在等待经理授权

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您的假日请求+getrecordd.Datefrom+-+getrecordd.Dateto+已被授权。

您可以获取所有记录，然后使用foreach

或者使用ForEach方法

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您需要将所有值连接到单个字符串，以便在文本框中使用它。你认为结果应该是什么样的？

string authorised = "notReviewed";
    SundownDatabaseEntities5 dbb = new SundownDatabaseEntities5();
    System.Windows.Forms.Form ff = System.Windows.Forms.Application.OpenForms["Login"];
        int idd = Convert.ToInt32(((Login)ff).idTb.Text);
        var getrecordd = dbb.Holidays.Where(a => a.Id == idd).SingleOrDefault();

            if (getrecordd.Authorised == authorised)
            {
            holidaysAuthorisedTb.Text = "Your holiday request (" + getrecordd.Datefrom + " - "+getrecordd.Dateto+") has been sent. Waiting for manager to authorise it...";
            }

var getrecordds = dbb.Holidays.Where(a => a.Id == idd).ToList();
foreach (var getrecordd in getrecordds) 
{
   if (getrecordd.Authorised == authorised)
   {
        holidaysAuthorisedTb.Text += "Your holiday request (" + getrecordd.Datefrom + " - "+getrecordd.Dateto+") has been sent. Waiting for manager to authorise it...";
   } 
   else 
   {
       holidaysAuthorisedTb.Text += "Your holiday request (" + getrecordd.Datefrom + " - "+getrecordd.Dateto+") has been sent. Waiting for manager to authorise it..."
    }

}

dbb.Holidays.Where(a => a.Id == idd).ForEach ( x => 
{
       if (x.Authorised == authorised)
       {
            holidaysAuthorisedTb.Text += "Your holiday request (" + x.Datefrom + " - "+x.Dateto+") has been sent. Waiting for manager to authorise it...";
       } 
       else 
       {
           holidaysAuthorisedTb.Text += "Your holiday request (" + x.Datefrom + " - "+x.Dateto+") has been sent. Waiting for manager to authorise it..."
       }
});