Question

我有一些代码如下：

if {
  this.showhide.ImageUrl = "../common/images/hide-icon.png";
  this.showhide.AlternateText = "Hide SearchBar";
  this.searchBar.Visible = false;
  Session["showHideImage"] = "hide";
  ScreenProjectSearch ProjSearch = CurrentProjectSearch;
  lblTypeOfSearch.Text = "Search results are based on";
  string typeOfSearch = string.Empty;

  if (CurrentProjectSearch != null)
  {
    //lblTypeOfSearch.Text = "Search results are based on";

    if (CurrentProjectSearch.IsFileName)
      typeOfSearch += " Filename " + ProjSearch.TextSearch.Trim();
    if (CurrentProjectSearch.IsDescription)
      typeOfSearch += " Description " + ProjSearch.TextSearch.Trim();
    if (CurrentProjectSearch.IsPartNumber)
      typeOfSearch += " PartNumber " + ProjSearch.TextSearch.Trim();
    if (CurrentProjectSearch.IsState)
    {
      if (CurrentProjectSearch.IsDevelopment)
        typeOfSearch += " Development State ";
      if (CurrentProjectSearch.IsValidation)
        typeOfSearch += " Validation State ";
      if (CurrentProjectSearch.IsValidationPendingApproval)
        typeOfSearch += " ValidationPendingApproval State ";
      if (CurrentProjectSearch.IsPilot)
        typeOfSearch += " Pilot State ";
      if (CurrentProjectSearch.IsFactory)
        typeOfSearch += " Factory State ";
      if (CurrentProjectSearch.IsCancel)
        typeOfSearch += " Cancel State ";
    }
    if (CurrentProjectSearch.IsDate)
      typeOfSearch += " Created Date From: " + ProjSearch.FromDate + " To: " + ProjSearch.ToDate;
    if (CurrentProjectSearch.IsPromoteDate)
      typeOfSearch += " Promoted Date From: " + ProjSearch.FromPromoteDate + " To: " + ProjSearch.ToPromoteDate;
    if (CurrentProjectSearch.IsCreatedBy)
      typeOfSearch += " Created By: " + ProjSearch.CreatedBy.ToString();
    if (CurrentProjectSearch.IsProjectIDs)
      typeOfSearch += " PrjoectIds: " + ProjSearch.ProjectIDs;
    if (CurrentProjectSearch.IsWorkFlow)
    {
      if (CurrentProjectSearch.IsMdiagsNormal)
        typeOfSearch += " WorkFlow: " + "Mdiags Normal";
      if (CurrentProjectSearch.IsMdiagsTestEngineer)
        typeOfSearch += " WorkFlow: " + "Mdiags TestEngineer";
    }
    if (!string.IsNullOrEmpty(typeOfSearch))
    {
      lblTypeOfSearch.Text += typeOfSearch;
      lblTypeOfSearch.Visible = true;
    }
  }
}

如果在lblTypeOfSearch不为空时附加了一些文字，我想在Page_Load中显示此typeOfSearch。如果我检查lblTypeOfSearch中的值Page_Load，它在那里显示为null。如何在那里使用这个变量来显示？

Answer 1

正如我所看到的，您的代码必须正常工作，可能会看到缓存结果，在这种情况下，您可以按ctrl + F5键查看新代码结果。如果你想在按钮点击和表单加载中访问你的文本，你可以将你的字符串变量声明为全局（在这些方法中）。

Answer 2

每次用户点击某些内容并且未在客户端处理时，都会向服务器发送请求，并返回一个新页面及其新实例化的代码隐藏。因此，如果你想在回发期间保留数据，返回到页面等，你需要先将它存储在某个地方（session，db，等等......）然后你可以在Page_Load中访问它。

请记住，网站是无国籍的。

.cs页面中标签的可见性/不可见性

2 个答案: