asp.net mvc - MVC - Display messages from the controller -

within mvc application have several situations where, depending on business rules of function, messages should displayed user.

we using jquery "toastr" library display messages user. development follows:

1) configuring message settings (alert message.cshtml)

@helper mostrarmensagensalerta(alerta alerta)  {      if (alerta != null)      {      <script>          $(document).ready(function () {              window.toastr.options.closebutton = '@alerta.mostrarbotaofechar';              window.toastr.options.newestontop = '@alerta.mostrarnotopo';                @foreach (aperam.biblioteca.util.base.entidades.mensagemalerta mensagem in alerta.mensagensalerta)              {                  string tipoalerta = mensagem.tipoalerta.tostring("f").tolower();                                  @: var opcoes = { /* adicione atributos específidos dos alertas toastr aqui */ };                    @:opcoes.closebutton = true;                  @:opcoes.progressbar = true;                  @:opcoes.positionclass = "toast-top-right";                    if (mensagem.manteralerta)                  {                      @:opcoes.timeout = 0;                      @:opcoes.extendedtimeout = 0;                  }                  else                  {                      @:opcoes.timeout = 10000;                      @:opcoes.extendedtimeout = 10000;                  }                    var texto = mensagem.mensagem.replace("\r\n", "<br /> ").replace("\r", "<br /> ").replace("\n", "<br /> ").replace("'", "");                  @:window.toastr['@tipoalerta']('@(new htmlstring(texto))', '@mensagem.titulo', opcoes);              }          });      </script>      }  }

2) partial view added main page (_message.cshtml):

@if (tempdata.containskey("alerta"))  {    alerta alerta = tempdata["alerta"] alerta;    @mensagemalerta.mostrarmensagensalerta(alerta);  }

3) master page, added div related partial view of messages:

<div id="div-mensagens">    @html.partial("_mensagem")  </div>

4) inside controller, have method adds messages tempdata:

public mensagemalerta adicionarmensagemalerta(string mensagem, tipoalerta tipoalerta = tipoalerta.info)  {  	string titulo = string.empty;    	switch (tipoalerta)  	{  		case tipoalerta.error:  			titulo = "erro";  			break;  		case tipoalerta.info:  		case tipoalerta.success:  			titulo = "informação";  			break;  		case tipoalerta.warning:  			titulo = "alerta";  			break;  	}    	alerta alerta = tempdata["alerta"] alerta;  	alerta = alerta ?? new alerta();    	var mensagemalerta = alerta.adicionarmensagemalerta(titulo, mensagem, tipoalerta);  	tempdata["alerta"] = alerta;  	return mensagemalerta;    }

message viewing happens correctly when request post , main page (_layout.cshtml) loaded again. problem when calls made via ajax , partial view loaded or no item returned. in these conditions, if partial view "_message.cshtml" not reloaded, messages not displayed.

another problem standard error handling uses function display messages. way, when error occurs ajax call, message displayed when user reloads entire page.

a palliative solution using is, @ end of every ajax call, make new call server forcing reloading of message div, follows:

$(document).ajaxcomplete(function(event, xhr, options) {          if(options.url.tostring().split('/')[2] != 'mensagens')              exibirmensagens();      });     function exibirmensagens() {          $("#div-mensagens").load('@url.action("mensagens")');   }        public actionresult mensagens()  {      return partialview("~/views/shared/_mensagem.cshtml");  }

i'm not satisfied solution given, i'm forcing new call server unnecessarily.

i share problem find best way handle situation.