How can I generate initialPreview and initialPreviewConfig from the server - asp.net-mvc

I am using http://plugins.krajee.com/file-input/demo in ASP .Net MVC 5 project, can you help me how I can generate initialPreview and initialPreviewConfig from server side?
public class ImgSetting
{
public string [] initialPreview { get; set; }
public ConfigSetting initialPreviewConfig { get; set; }
public string append { get; set; }
}
public class ConfigSetting
{
public string caption { get; set; }
public string width { get; set; }
public string url { get; set; }
public string key { get; set; }
public string [] extra { get; set; }
}
and I tried to make a JSON Array object:
ConfigSetting configSetting = new ConfigSetting();
configSetting.caption = file.FileName;
configSetting.width = "120px";
configSetting.url = "/localhost/avatar/delete";
configSetting.key = "100";
configSetting.extra = new string[] {id ="100" };
imgSetting.initialPreview = new string[] {"'<img src='~/Images/"+file.FileName +"' class='file-preview-image' alt='Desert' title='Desert'>'"};
imgSetting.initialPreviewConfig = configSetting;
imgSetting.append = "false";
string json = JsonConvert.SerializeObject(imgSetting);
return Json(json);
But it's still not working?

Related

Null value assigned when response is written to the Model object

public class BClass
{
public class RClass
{
public string stjCd { get; set; }
public string lgnm { get; set; }
public string stj { get; set; }
public string dty { get; set; }
public List<object> adadr { get; set; }
public string cxdt { get; set; }
public string gstin { get; set; }
public List<string> nba { get; set; }
public string lstupdt { get; set; }
public string rgdt { get; set; }
public string ctb { get; set; }
public Pradr pradr { get; set; }
public string tradeNam { get; set; }
public string sts { get; set; }
public string ctjCd { get; set; }
public string ctj { get; set; }
}
public class AClass
{
public string id { get; set; }
public string consent { get; set; }
public string consent_text { get; set; }
public int env { get; set; }
public string response_code { get; set; }
public string response_msg { get; set; }
public int transaction_status { get; set; }
public string request_timestamp { get; set; }
public string response_timestamp { get; set; }
public RClass result { get; set; }
}
}
//COntroller
BClass.AClass btr = new BClass.AClass();
var lst = JsonConvert.DeserializeObject<BClass.AClass>(strresult);
btr.response_code = lst.response_code;
btr.response_msg = lst.response_msg;
btr.result.lgnm = lst.result.lgnm;
The property btr.result.lgnm = lst.result.lgnm; Gives null value error object reference not set to instance of an object. but the lst variable has a value in the response received.Please provide suggesion
You can solve this by adding one line into your code.
btr.result = new BClass.RClass(); //This one. You need to initialize instance before assigning anything to it.
btr.result.lgnm = lst.result.lgnm;
or else, you can also create default constructor for class A.
public AClass()
{
result = new RClass();
}
I would suggest you to please have a look at below web resources for naming conventions widely used for c# language.
Properties naming conventions: https://learn.microsoft.com/en-us/dotnet/standard/design-guidelines/names-of-type-members
class naming conventions: https://learn.microsoft.com/en-us/dotnet/standard/design-guidelines/names-of-classes-structs-and-interfaces
Assigning this way does not give null reference exception
RClass rclass=new RClass();
rclass.lgnm=lst.result.lgnm

MVC How do I create a new object with default value

I have a view that has add/edit, edit is working fine but for add I would like to set default values for type. Is there a way to do this in the view the cshtml file?
add view
#Html.Partial("RegimenReferences", new (ReferencesModel {Type = "defaultType}") )
edit view
#Html.Partial("RegimenReferences", (ReferencesModel)Model)
Model
public class ReferencesModel
{
public ReferencesModel()
{
}
public ReferencesModel(Reference reference)
{
this.Id = reference.Id;
this.Link = reference.Link;
this.Text = reference.Text;
this.Type = reference.Type;
this.Regimens = reference.Regimens;
this.GuidelineId = reference.GuidelineId;
this.SortOrder = reference.SortOrder;
}
public long Id { get; set; }
public string Link { get; set; }
public string Text { get; set; }
public string Type { get; set; }
public int Regimens { get; set; }
public Guid? GuidelineId { get; set; }
public int SortOrder { get; set; }
}
}
Are you wanting to set those types specifically in cshtml?
Could you create a new constructor for your model that takes in any fields you want to set with a default?
public class ReferencesModel
{
public ReferencesModel(string type = null)
{
Type = type;
}
public ReferencesModel(Reference reference)
{
this.Id = reference.Id;
this.Link = reference.Link;
this.Text = reference.Text;
this.Type = reference.Type;
this.Regimens = reference.Regimens;
this.GuidelineId = reference.GuidelineId;
this.SortOrder = reference.SortOrder;
}
public long Id { get; set; }
public string Link { get; set; }
public string Text { get; set; }
public string Type { get; set; }
public int Regimens { get; set; }
public Guid? GuidelineId { get; set; }
public int SortOrder { get; set; }
}
or just set a default value in the constructor/in variable declaration
public ReferencesModel()
{
Type = "default type";
}
public string Type = "default type";

How create view for show cookie's info in asp.net mvc using razor?

I'm developing an online store using asp.net mvc 5 and I used cookie for add goods to cart . I want to have a page to show selected items (in cookie) and I don't know how do it, I just wrote an action result for it named Basket . I should use #model List<BasketVM> in my view but when don't know how ?!
could anyone help me please ?
Thanks
GoodController
[HttpGet]
public ActionResult Basket()
{
GoodDetailsRepositories blGoodDetails = new GoodDetailsRepositories();
List<BasketVM> listBasket = new List<BasketVM>();
List<HttpCookie> lst = new List<HttpCookie>();
for (int i = Request.Cookies.Count - 1; i >= 0; i--)
{
if (lst.Where(p => p.Name == Request.Cookies[i].Name).Any() == false)
lst.Add(Request.Cookies[i]);
}
foreach (var item in lst.Where(p => p.Name.StartsWith("NishtmanCart_")))
{
listBasket.Add(new BasketVM {
GoodDetails = blGoodDetails.Find(Convert.ToInt32(item.Name.Substring(13))), Count =Convert.ToInt32(item.Value) });
}
return View(listBasket);
}
BasketVM.cs
public class BasketVM
{
public NP1.Models.GoodDetail GoodDetails { get; set; }
public int Count { get; set; }
}
GoodDetails.cs
public partial class GoodDetail
{
public GoodDetail()
{
this.FactorItems = new HashSet<FactorItem>();
}
public int DetailsGoodID { get; set; }
public int FKSubGoods { get; set; }
public string NishtmanCode { get; set; }
public string DetailsColor { get; set; }
public string DetailsExist { get; set; }
public long DetailsNowPrice { get; set; }
public Nullable<long> DetailsPrePrice { get; set; }
public string DetailsName { get; set; }
public string DetailsLeatherType { get; set; }
public string DetailsWeight { get; set; }
public string DetailsSize { get; set; }
public string DetailsProducer { get; set; }
public string DetailsExtraInfo { get; set; }
public string DetailsURL { get; set; }
public string DetailsKeyWords { get; set; }
public string DetailsTags { get; set; }
public int DetailsLike { get; set; }
public int DetailsDisLike { get; set; }
public string DetailsImage1 { get; set; }
public string DetailsSmallImage1 { get; set; }
public string DetailsImage2 { get; set; }
public string DetailsSmallImage2 { get; set; }
public string DetailsImage3 { get; set; }
public string DetailsSmallImage3 { get; set; }
public string DetailsImage4 { get; set; }
public string DetailsSmallImage4 { get; set; }
public virtual SubGood SubGood { get; set; }
public virtual ICollection<FactorItem> FactorItems { get; set; }
}
Add to cart code
public ActionResult AddToCart (int Id , int Count)
{
try
{
if (Request.Cookies.AllKeys.Contains("NishtmanCart_" + Id.ToString()))
{
//Edit cookie
var cookie = new HttpCookie("NishtmanCart_" + Id.ToString(), (Convert.ToInt32(Request.Cookies["NishtmanCart_" + Id.ToString()].Value) + 1).ToString());
cookie.Expires = DateTime.Now.AddMonths(1);
cookie.HttpOnly = true;
Response.Cookies.Set(cookie);
}
else
{
//Add new cookie
var cookie = new HttpCookie("NishtmanCart_" + Id.ToString(), Count.ToString());
cookie.Expires = DateTime.Now.AddMonths(1);
cookie.HttpOnly = true;
Response.Cookies.Add(cookie);
}
List<HttpCookie> lst = new List<HttpCookie>();
for (int i = 0; i < Request.Cookies.Count; i++ )
{
lst.Add(Request.Cookies[i]);
}
bool isGet = Request.HttpMethod == "GET";
int CartCount = lst.Where(p => p.Name.StartsWith("NishtmanCart_") && p.HttpOnly != isGet).Count();
return Json(new MyJsonData()
{
Success = true,
Script = MessageBox.Show("Good added successfully", MessageType.Success).Script,
Html = "cart items (" + CartCount.ToString() + ")"
}
);
}
catch(Exception)
{
return Json(new MyJsonData()
{
Success = false,
Script = "alert('Good didn't add');",
Html = ""
}
);
}
}
with what name you are saving the cookies you can retrieve like this let say userid u want to get rest what you have wriiten will work:
if (this.ControllerContext.HttpContext.Request.Cookies.AllKeys.Contains("Userid"))
{
HttpCookie cookie = this.ControllerContext.HttpContext.Request.Cookies["Userid"];
// retrieve cookie data here
}
how to call in view :
Viewbag.userid = #Request.Cookies["Userid"].value
In order to read a cookie client-side it needs to be created with the HttpOnly flag set to false.
Please go thorugh the below already asked question.
MVC Access stored cookie

MVC model value becomes null on post back

I am getting null value for the model on postback.I am not able to find out where I am going wrong.I have seen similar questions but couldn't find any solution yet.
Here is my code:
Controller:
public ActionResult ContactUpdate(string id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
string[] testsplit = id.Split(',');
List<int> intTest = new List<int>();
foreach (string s in testsplit)
intTest.Add(int.Parse(s));
ObjectParameter ObjParam = new ObjectParameter("ErrorCode", 0);
var cont = db.spErrorContactGet(365, ObjParam);
var ToBeUpdated = (from contacts in cont
where intTest.Contains(contacts.ResponseID)
select contacts);
IEnumerable<spErrorContactGet_Result> Update = ToBeUpdated.ToList();
return View(Update);
}
[HttpPost]
public ActionResult ContactUpdate(List<spErrorContactGet_Result> Res)
{
if (Res == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
//do something
// redirect to another view
}
Here is the model class:
public class spErrorContactGet_Result
{
public int ResponseID { get; set; }
public string ContactAlchemyMessage { get; set; }
public string ContactTeamAlchemyMessage { get; set; }
public string ContactElectronicAddressAlchemyMessage { get; set; }
public string ContactAccountAlchemyMessage { get; set; }
public string CRMContactID { get; set; }
public string InfluenceLevel { get; set; }
public string JobRole { get; set; }
public string Department { get; set; }
public string DepartmentName { get; set; }
public string MobilePhone { get; set; }
public string Email { get; set; }
public string Suffix { get; set; }
public string FaxNumber { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string MiddleName { get; set; }
public string JobTitle { get; set; }
public string HonorablePrefix { get; set; }
public string Prefix { get; set; }
public string ContactAuthPhoneId { get; set; }
public string ContactAuthDmailId { get; set; }
public string ContactAuthEmailId { get; set; }
public string AllowFax { get; set; }
public string PartnerContactAuthPhoneID { get; set; }
public string PartnerContactAuthDmailID { get; set; }
public string PartnerContactAuthEmailID { get; set; }
public string PrivacyStatementReviewed { get; set; }
public string PreferredLanguage { get; set; }
public string IndWorkPhone { get; set; }
public string FullNamePronunciation { get; set; }
public string CRMOwner { get; set; }
public string KeyContact { get; set; }
public string MarketingAudience { get; set; }
public bool IsSelected { get; set; }
}
}
I am unable to post the view in the right format.
It is likely that structure of your view differs from one that is of your model, they must syntactically match. If you would post your view it could help. BTW there is no 'Postback' in MVC

MVC Code- or Model First

Most of the tutorials for MVC with Entity Framework are centered around Code-First, where you write classes for generating the model. This gives the advantage of control and Migrations, but I think it lack overview. I would therefore prefer to create the model using the graphical designer, but I cannot see how or if data migrations work in this context. It seems, that when I change the model (with data in the database), all the data is deleted in all tables.
Is there a way around this?
How can I do validation when using Model-First? Partial classes?
you may use the global validation beside mvc validation
example :
public class ValidationCriteria
{
public ValidType Type { get; set; }
public ValidRange Range { get; set; }
public ValidFormat Format { get; set; }
public ValidIsNull IsNull { get; set; }
public ValidCompare Compare { get; set; }
public ValidDB DB { get; set; }
public string Trigger { get; set; }
public Dictionary<string, ValidationCriteria> Before { get; set; }
public string After { get; set; }
public class ValidDB
{
public string functionName { get; set; }
public object[] param { get; set; }
public object functionClass { get; set; }
public string msg { get; set; }
public bool check = false;
}
public class ValidCompare
{
public string first { get; set; }
public string second { get; set; }
public string compareOperator { get; set; }
public string compareValue { get; set; }
public string msg { get; set; }
public bool check = false;
}
public ValidationCriteria()
{
this.Range = new ValidRange();
this.Format = new ValidFormat();
this.IsNull = new ValidIsNull();
this.Type = new ValidType();
this.Compare = new ValidCompare();
this.DB = new ValidDB();
this.Trigger = "blur";
this.Before = new Dictionary<string, ValidationCriteria>();
this.After = "";
}
public class ValidType
{
// checking element is integer.
public bool isInt { get; set; }
// checking element is decimal.
public bool isDecimal { get; set; }
public string msg { get; set; }
public bool check = false;
}
public class ValidRange
{
public long min { get; set; }
public long max { get; set; }
public string msg { get; set; }
public bool check = false;
}
public class ValidFormat
{
public bool isEmail { get; set; }
public string regex { get; set; }
public string msg { get; set; }
public bool check = false;
}
public class ValidIsNull
{
public string nullDefaultVal { get; set; }
public string msg { get; set; }
public bool check = false;
}
}
Meanwhile you may use validation part in your controller
Example :
private bool validateMaintainanceManagement(MaintainanceCRUD.Maintainance model, bool edit = false, bool ServerValidation = true)
{
bool ValidModel = false;
Dictionary<string, ValidationCriteria> validCriteria = new Dictionary<string, ValidationCriteria>();
#region maintainTitle Criteria
ValidationCriteria maintainTitle = new ValidationCriteria();
maintainTitle.IsNull.msg = Resources.Home.ErrmaintainTitle;
maintainTitle.IsNull.check = true;
maintainTitle.IsNull.nullDefaultVal = "-1";
//maintainTitle.Trigger = "change"; // this may trigger if you are using dropdown
validCriteria.Add("maintainTitle", maintainTitle);
#endregion

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