如何检查一般方法中单击的按钮？

Question

我在下面尝试过

public partial class PaymentSearch : System.Web.UI.Page
{
   private bool button1WasClicked = false;


   protected void linkToday_Click(object sender, EventArgs e)
   {
      button1WasClicked = true;
    }

  protected void ddlRecordPayment_SelectedIndexChanged(object sender, EventArgs e)
  {
  gridAllPaymentBind(1);
  }
   public void gridAllPaymentBind(int pageIndex)
   {
   if (button1WasClicked == true)
  {
   result = 3;
    command.Parameters.AddWithValue("@result", result);
   }

 }

但是在'gridAllPaymentBind'方法中，'button1WasClicked'得到了错误的值，在下拉列表更改事件触发前，我一直单击链接按钮。

Answer 1

ASP.NET本质上是无状态的，因此变量值将不会在回发之间持久存在。 因此，要使其持久化，可以使用Session或ViewState 。

public partial class PaymentSearch : System.Web.UI.Page
{
   private bool button1WasClicked
   {
       get { return (bool)Session["button1WasClicked"]; }
       set { Session["button1WasClicked"] = value; }
   }

   protected void linkToday_Click(object sender, EventArgs e)
   {
       button1WasClicked = true;
   }

  protected void ddlRecordPayment_SelectedIndexChanged(object sender, EventArgs e)
  {
      gridAllPaymentBind(1);
  }

  public void gridAllPaymentBind(int pageIndex)
  {
      if (button1WasClicked == true)
      {
         result = 3;
        command.Parameters.AddWithValue("@result", result);
      }
  }
}

Answer 2

尝试如下...

protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack == true)
            {
                Session["button1WasClicked "] = false;
}
}


   protected void linkToday_Click(object sender, EventArgs e)
   {
       Session["button1WasClicked "] = true;
    }

  protected void ddlRecordPayment_SelectedIndexChanged(object sender, EventArgs e)
  {
  gridAllPaymentBind(1);
  }
   public void gridAllPaymentBind(int pageIndex)
   {
bool button1WasClicked = (bool)Session["button1WasClicked "];
   if (button1WasClicked == true)
  {
   result = 3;
    command.Parameters.AddWithValue("@result", result);
   }

 }

希望这对您有帮助。