Question

[HttpPost]
public ActionResult Index(SecurityMappingModel objModel)
{

    //edit code

    if (objModel.Id != Guid.Empty)
    {
        if (ModelState.IsValid)
        {
            mappings = (List<SecurityMappingModel>)Session["Mappings"];
            var objRemove = mappings.FirstOrDefault(m => m.Id == objModel.Id);
            if (objRemove != null)
            {
                mappings.Remove(objRemove);
                mappings.Add(objModel);
                ViewBag.Mappings = mappings;
            }
            Session["Mappings"] = mappings;
return RedirectToAction("Index");
}

inside objModel one of the field is having value 0 as it is a textfield i’m putting value into it but inside Controller oject objModel showing that field value is zero 🙁 🙁 why???

Answer 1

Apparently one of your model values is not valid. You should be able to find out which one by looking at the items in ModelState.Values. Each item has an Errors property.
The result of this line should contain at least one item:

var errors = ModelState.Values.Where(value=>value.Errors.Any());