Add errors to the Partial View before rendering

Question

I have some code that renders Partial View based on some model to html.

And after this I send this html to the page.

In case of the errors I would like to use

  @Html.ValidationSummary(true, "", new { @class = "text-danger" })

in order to display them.

So my question is following: Is it posible to add some errors to model right before the rendering?

#region Regenerate Partial View in case of error
var moduleLocation = new ModuleLocation(); // Some custom class

string renderedPartialView = RenderPartialViewToString("_CreateLocationModalPartial", moduleLocation);
#endregion



#region Method to render Partial View
public string RenderPartialViewToString(string viewName, object model)
{
            if (string.IsNullOrEmpty(viewName))
                viewName = ControllerContext.RouteData.GetRequiredString("action");

            ViewData.Model = model;

            using (StringWriter sw = new StringWriter())
            {
                ViewEngineResult viewResult = ViewEngines.Engines.FindPartialView(ControllerContext, viewName);
                ViewContext viewContext = new ViewContext(ControllerContext, viewResult.View, ViewData, TempData, sw);
                viewResult.View.Render(viewContext, sw);

                return sw.GetStringBuilder().ToString();
            }
}
#endregion

have you tried with ViewData.ModelState.AddModelError("", "error") ? — Cristi Pufu
– Cristi Pufu, Commented Oct 7, 2016 at 15:30

Cristi Pufu · Accepted Answer · 2016-10-07 15:50:10Z

2

Yes it is, by adding the errors to the ModelState:

ViewData.ModelState.AddModelError("key", "error")

edited Oct 7, 2016 at 15:50

answered Oct 7, 2016 at 15:42

Cristi Pufu

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