@Url.Action only works first time[Answered] RSS

• • Reply
  masterdineen

  Member

  35 Points

  375 Posts

  @Url.Action only works first time

  Jan 30, 2020 08:30 AM|masterdineen|LINK

  Hello there.

  In my view i have 3 images with URL.Action, each one passes a different parameter to a HttpGet ActionResult httpGet in a controller.

  First time a click on any of the images runs great, but when i click on a different on, the HttpGet ActionResult the ReportName param is null.

  See view below.

  @model FormsAuthenticationMVC.Models.Report_Security
  
  
  @{
  
      
  }
  
  
  
  <form method="get" action="Reports">
  
  
  
      <table style="width:100%;">
  
          <tr style="text-align:center; margin-bottom:5000px">
  
              <td>
  
                  <h2>O2 Dashboard</h2>
  
              </td>
  
  
          </tr>
  
          <tr style="text-align: center">
  
  
              <td style="padding:20px">
  
  
                  <input type="image" src="~/Images/O2 Dashboard.png" style="width:200px; width:200px"
                         onclick="location.href='@Url.Action("Reports", "Home")?ReportName=PO Tracker'" />
  
                  <input type="image" src="~/Images/O2 Dashboard.png" style="width:200px; width:200px"
                         onclick="location.href='@Url.Action("Reports", "Home")?ReportName=Where am I spending my money'" />
  
                  <input type="image" src="~/Images/O2 Dashboard.png" style="width:200px; width:200px"
                         onclick="location.href='@Url.Action("Reports", "Home")?ReportName=Data Table'" />
  
  
  
              </td>
  
  
          </tr>
  
  
  
      </table>
  
  
  
  
   @Html.Raw(Session["EmbedCode"])
  
  
  
  
  </form>

  See Controller below

  using System;
  using System.Collections.Generic;
  using System.Configuration;
  using System.Linq;
  using System.Web;
  using System.Web.Mvc;
  using FormsAuthenticationMVC.Models;
  using System.Runtime.Caching;
  using System.Data.SqlClient;
  
  
  
  namespace FormsAuthenticationMVC.Controllers
  {
  
      //[Authorize]
      public class HomeController : Controller
      {
  
  
  
          public ActionResult Index()
          {
              return View();
          }
  
  
          [HttpGet]
          public ActionResult Reports(string ReportName)
          {
              TempData["ReportName"] = ReportName;
              ViewBag.Message = "O2 Dashboard";
  
              ASP_AuthEntities ReportTable = new ASP_AuthEntities();
              
  
              {
  
           
  
                  
                  if(ReportName != null)
  
                  { 
  
                      Session.Remove("EmbedCode");
                              
                   
  
  
                      string EmbedCode = ReportTable.Database.SqlQuery<string>("SELECT [EmbedCode] FROM asp.Report_Security WHERE [ReportName] = @param1", new SqlParameter("@param1", ReportName)).FirstOrDefault();
  
  
                      HttpContext.Session["EmbedCode"] = EmbedCode;
  
  
                  }
  
  
              }
  
                  return View();
  
          }
  
          [HttpPost]
          [ValidateInput(false)]
          public ActionResult Reports(Report_Security model, string ReportName)
          {
  
  
  
  
              return View();
          }
  
  
  
      }
  
  }

  So yeah first time around works just as i want it to, but second time.  If i click on a different image that will have a different param value,  The value is not passed through to the httpGet parameter

  Can someone suggest anything i a missing please

• • Reply
  mgebhard

  All-Star

  53001 Points

  23596 Posts

  Re: @Url.Action only works first time

  Jan 30, 2020 12:38 PM|mgebhard|LINK

  Learn the input type=image" if you are interested in learning how to use the HTML 5 tag to submit a form.  It does not make sense to design a form then override the form with the onclick event.  Pick one design direction.

  https://www.w3schools.com/tags/att_input_type_image.asp

  I think the design works once because there's an Index View and a Report View.  The Index View works while the Report View has the type="image" attribute inputs which submits x and y parameters in the URL.

  I recommend using standard HTML and MVC helpers.  Also, I don't see any reason to use JavaScript (or a form) when you can use a link. 

  @{
      ViewBag.Title = "Reports";
  }
  
  <h2>@TempData["ReportName"]</h2>
  
      <table style="width:100%;">
          <tr style="text-align:center; margin-bottom:5000px">
              <td>
                  <h2>O2 Dashboard</h2>
              </td>
          </tr>
          <tr style="text-align: center">
              <td style="padding:20px">
                  <a href="@Url.Action("Reports", "Home", new {ReportName = "PO Tracker" })">
                      <img src="~/Images/O2 Dashboard.png" />
                  </a>
                  <a href="@Url.Action("Reports", "Home", new {ReportName = "Where am I spending my money" })">
                      <img src="~/Images/O2 Dashboard.png" />
                  </a>
                  <a href="@Url.Action("Reports", "Home", new {ReportName = "ReportName=Data Table" })">
                      <img src="~/Images/O2 Dashboard.png" />
                  </a>
              </td>
          </tr>
      </table>

          [HttpGet]
          public ActionResult Reports(string ReportName)
          {
              TempData["ReportName"] = ReportName;
              return View();
          }

• • Reply
  masterdineen

  Member

  35 Points

  375 Posts

  Re: @Url.Action only works first time

  Jan 30, 2020 01:03 PM|masterdineen|LINK

  Excellent

  Thank you Mgebhard

  i am learning i promise LOL