如何调用将返回到调用控制器但也可以具有 RedirectToAction 的控制器操作

Question

我的 .Net Core 3.1 应用程序中有一个控制器，它调用另一个控制器操作。 在我在被调用的控制器中添加RedirectToAction之前，一切正常。 我现在希望该控制器在适当的情况下重定向到错误页面，否则返回到原始控制器中调用它的位置。

这是我的控制器中的代码：

public ActionResult Edit(IFormCollection collection, string saveClose)
{
    //do stuff
    LoadArrayDataForDB(Id, collection["names"].ToString(), collection["places"].ToString(), collection["countries"].ToString());
    //do more stuff
    
    return View(IVM);
}

//This was the Original LoadArrayDataForDB action
public void LoadArrayDataForDB(string id, string names, string places, string countries)
{
    //add error checking
    _adoSqlService.DeleteAffectedNames(id);
    _adoSqlService.DeleteSelectedPlaces(id);
    _adoSqlService.DeleteCountries(id);
}

//This is how I need to change the LoadArrayDataForDB action
public void LoadArrayDataForDB(string id, string names, string places, string countries)
{ 
    //add error checking
    string done = _adoSqlService.DeleteAffectedNames(id);
    if (done != "Successful")
    {
        return RedirectToAction("Error", "Home", new { errordescription = "Unable to delete names" });
    }

    done = _adoSqlService.DeleteAffectedPlaces(id);
    if (done != "Successful")
    {
        return RedirectToAction("Error", "Home", new { errordescription = "Unable to delete places" });
    }       

    done = _adoSqlService.DeleteAffectedCountries(id);
    if (done != "Successful")
    {
        return RedirectToAction("Error", "Home", new { errordescription = "Unable to delete countries" });
    }       
    //etc....
    //Just return back to next step in the Edit action
}

我该如何做我需要做的事情？

Answer 1

将您的加载功能更改为此

[NonAction]
private string LoadArrayDataForDB( id, string names, string places, string countries)
{ 

    //add error checking

    string done = _adoSqlService.DeleteAffectedNames(id,names); // I guess you 
                                                  // have to use names too
    if (done != "Successful")   return  "Unable to delete names";
   
    done = _adoSqlService.DeleteAffectedPlaces(id,places);
    if (done != "Successful")return  "Unable to delete places";
    
    done = _adoSqlService.DeleteAffectedCountries(id,contries);
    if (done != "Successful") return  "Unable to delete countries";
    
    //etc....
return string.Empty
)


or if you want to try all of them before return you can use this

var errMsg=string.Empty;

 string done = _adoSqlService.DeleteAffectedNames(id,names); // I guess you 
                                                  // have to use names too
    if (done != "Successful")   errMsg=  "Unable to delete names";
   
    done = _adoSqlService.DeleteAffectedPlaces(id,places);
    if (done != "Successful") errMsg+=  " Unable to delete places";
    
    done = _adoSqlService.DeleteAffectedCountries(id,contries);
    if (done != "Successful") errMsg+=  "Unable to delete countries";
if(!string.IsNullOrEmpty(errMsg) return errMsg;

   //etc....
return string.Empty

改变你的行动：

public ActionResult Edit(IFormCollection collection, string saveClose)
{
    //do stuff

var errorDescription=  LoadArrayDataForDB(intid, collection["names"].ToString(), collection["places"].ToString(), collection["countries"].ToString())) 

if (! string.IsNullOrEmpty(errorDescription) )
 return RedirectToAction("Error", "Home", new { errorDescription });

    //do more stuff
    
    return View(IVM);
}