mvc checkboxes selection

Help Needed

10y2.9k

I am working with checkboxes in MVC.I have a table with one clolumn as "bit" type.The following code giving me error

 [HttpPost]

 public string Index(IEnumerable cities)

if (cities.Count(x => x.Chosen) == 0)

 return "You did not select any city";

Chosen is a bit type here. and when i am trying to build it says "

Cannot implicitly convert type 'bool?' to 'bool'. An explicit conversion exists (are you missing a cast?)

3 Replies

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Vinay Singh10y ago
Hi
A checkbox needs to have a value (After all it can only be in one of two states, checked or unchecked true or false). Why can't you just make isActive a bool since it's just the view model. In your model you can keep isActive as a nullable. When you create the view model just check to see if the model's isActive is null and if so set the view model's isActive to false.
Another alternative is to not use the strongly typed helper which expects a bool, and just use Html.CheckBox like so
Try the below code
@Html.CheckBox("IsActive", Model.IsActive.HasValue? Model.IsActive : false)
Manas Mohapatra10y ago
Follow below link:
http://forums.asp.net/t/1794010.aspx?convert+type+bool+to+bool+for+a+Html+CheckBoxFor
Ajay Malik10y ago
consider this code
model
publicclassMerchantModel
{
publicintAppId{get;set;}
publicstringName{get;set;}
publicboolIsSelected{get;set;}
}
publicclassMerchantViewModel
{
publicListMerchants{get;set;}
}
controller
//GET:Default
publicActionResultIndex()
{
varmerchant1=newMerchantModel
{
AppId=1,
Name="Bob"
};
varmerchant2=newMerchantModel
{
AppId=2,
Name="Ted"
};
varmerchant3=newMerchantModel
{
AppId=3,
Name="Alice"
};
Listlist=newList();
list.Add(merchant1);
list.Add(merchant2);
list.Add(merchant3);
varmodel=newMerchantViewModel
{
Merchants=list
};
returnView(model);
}
[HttpPost]
publicActionResultIndex(MerchantViewModelmodel)
{
returnView(model);
}
}
view
"viewport"content="width=device-width"/>
Index
"/default/index"method="post">
@for(inti=0;i
{
}
@Html.CheckBoxFor(x=>x.Merchants[i].IsSelected)
@Html.HiddenFor(x=>x.Merchants[i].AppId)
@Model.Merchants[i].AppId
@Html.HiddenFor(x=>x.Merchants[i].Name)
@Model.Merchants[i].Name
"submit">Submit