Controller said Object Undefined

Emmmanuel FIADUFE

Hello Team,

Am having some chanllegings here, I am trying to pass data from my controller to the database through my modelView,

But keep getting this error, object undefined.

public JsonResult SaveProduct(ProductViewModel productModel)
{
   ASPNETMASTERPOSTEntities db = new ASPNETMASTERPOSTEntities();
    var result = false;
    try
    {
        tblCategory category = new tblCategory();
        if (productModel.tblCategory.CategoryId > 0)
        {
            category = db.tblCategories.Where(x => x.CategoryId == productModel.CategoryId).FirstOrDefault();
        }
        else
        {

            category.CategoryName = productModel.tblCategory.CategoryName;
            if (productModel.tblCategory.CategoryId <= 0)
                db.tblCategories.Add(category);
            db.SaveChanges();
            category.CategoryId = productModel.tblCategory.CategoryId;

        }
        tblProduct product = new tblProduct();
        if (productModel.ProductId > 0)
        {
            product = db.tblProducts.Where(a => a.ProductId == productModel.ProductId).FirstOrDefault();
        }
        product.ProductName = productModel.ProductName;
        product.Status = productModel.Status;
        product.CategoryId = productModel.tblCategory.CategoryId;
        if (productModel.ProductId <= 0)
        {
            db.tblProducts.Add(product);
        }

        db.SaveChanges();
        result = true;
    }
    catch (Exception ex)
    {
        throw ex;
    }
    return Json(result, JsonRequestBehavior.AllowGet);
}

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vishal Joshi3y ago
Accepted answer
Hello,

Please check the API call from javascript sending model data in the correct format. it should be the same as model productModel.

Also, need to change in API code as below.
```
category = db.tblCategories.Where(x => x.CategoryId == productModel.CategoryId).FirstOrDefault();

//Replace with below

category = db.tblCategories.Where(x => x.CategoryId == productModel.tblCategory.CategoryId).FirstOrDefault();
```
Thanks

Vishal Joshi
Emmmanuel FIADUFE3y ago
Thank you team,

Am so much greatful

Amit Mohanty3y ago

public JsonResult SaveProduct(ProductViewModel productModel)
{
    ASPNETMASTERPOSTEntities db = new ASPNETMASTERPOSTEntities();
    var result = false;
    try
    {
        tblCategory category = new tblCategory();
        if (productModel.tblCategory != null && productModel.tblCategory.CategoryId > 0)
        {
            category = db.tblCategories.Where(x => x.CategoryId == productModel.tblCategory.CategoryId).FirstOrDefault();
        }
        else
        {
            category.CategoryName = productModel.tblCategory.CategoryName;
            if (productModel.tblCategory.CategoryId <= 0)
                db.tblCategories.Add(category);
            db.SaveChanges();
            category.CategoryId = productModel.tblCategory.CategoryId;
        }

        tblProduct product = new tblProduct();
        if (productModel.ProductId > 0)
        {
            product = db.tblProducts.Where(a => a.ProductId == productModel.ProductId).FirstOrDefault();
        }
        product.ProductName = productModel.ProductName;
        product.Status = productModel.Status;
        product.CategoryId = category.CategoryId;  // Use category.CategoryId instead of productModel.tblCategory.CategoryId
        if (productModel.ProductId <= 0)
        {
            db.tblProducts.Add(product);
        }

        db.SaveChanges();
        result = true;
    }
    catch (Exception ex)
    {
        throw ex;
    }
    return Json(result, JsonRequestBehavior.AllowGet);
}