fluentvalidation validation of ASP. NET Web API

Recently in the Web API, the use of streaming authentication, simply say this streaming authentication.

First we define a filter, as follows

 public class ValidateResponseFilterAttribute : ActionFilterAttribute     {        public override void  OnActionExecuting (System.web.http.controllers.httpactioncontext actioncontext)          {            if  (! ActionContext.ModelState.IsValid)             {                 // actioncontext.modelstate.keys                 actioncontext.response = actioncontext.request.createerrorresponse ( Httpstatuscode.badrequest, actioncontext.modelstate);             }       &nbsP;}     }

Overrides the action execution method and returns 500error to the client if the request model has an exception.

What do we do next, define a Basecontroller

[validateresponsefilter]    public class basecontroller :  apicontroller    {        protected  Httpresponsemessage createsystemerrorresponse (string errormsg)          {            return  Request.createresponse<object> (                    new                    {                        issuc = false,                         errormsg = errormsg                    });        }         Protected httpresponsemessage createerrorresponse (String responsecode, type type  = null, httpstatuscode statuscode = httpstatuscode.ok)          {            return  Request.createresponse<object> (statuscode,                    new                    {                        issuc =  false,                        errormsg = messagereshelper.getmessage (Type != null ? type. Name : this. GetType (). Name, responsecode)                     });        }         protected httpresponsemessage createsucresponse (String responseCode  =  "")         {             if  (String. IsNullOrEmpty (responsecode))             {                 return  Request.createresponse<object> (NEW&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&Nbsp;            {                         issuc = true                    });             }             return Request.CreateResponse< Object> (                    new                    {                        IsSuc = true,                        errormsg =  Messagereshelper.getmessage (this. GetType (). Name, responsecode)                     });         }}

On Basecontroller We mark the above attribute and verify that it is not intercepted by the request.

Now let's look at the definition of request

public class customervalidaterequest :  ivalidatableobject{    private readonly ivalidator _validator;     public customervalidaterequest ()     {         _validator = new customervalidaterequestvalidator ();    }     public string Email { get; set; }     Public string password { get; set; }    public string  ValidateCode { get; set; }    public IEnumerable< Validationresult> validate (Validationcontext validationcontext)     {         return _validator. Validate (This). Tovalidationresult ();     }} 

After the

Request is defined, we write the method at the bottom to get the result of the validation. Now let's look at our validator

public class customervalidaterequestvalidator : abstractvalidator< Customervalidaterequest>{    public customervalidaterequestvalidator ()      {        rulefor (dto => dto. Email). Notnull (). Notempty ();         rulefor (dto => dto. Password). Notnull (). Notempty ();         rulefor (dto => dto. Validatecode). Notnull (). Notempty (). Length (webappsettings.validatecodelength);         when (dto =>  !string. Isnullorwhitespace (DTO. Email),  ()  =>        {             rulefor (C => c.email). Matches (@ "^ [\w-\.] +) @ ((\[[0-9]{1,3}\. [0-9] {1,3}\. [0-9] {1,3}\.) | ([\w-]+\.) +)) ([a-za-z]{2,4}| [0-9] {1,3}) (\]?) $ ");         });     }} 

Here is the logic that we want to verify, which verifies the most basic non-null, length, and can also validate the regular. The rulefor returned here is the following interface type

Public irulebuilderinitial<t, Tproperty> rulefor<tproperty> (expression<func<t, TProperty>> Expression

The interface inherits the Irulebuilder interface

Public interface Irulebuilderinitial<t, out tproperty>: Ifluentinterface, Irulebuilder<t, Tproperty>, Iconfigurable<propertyrule, Irulebuilderinitial<t, tproperty>>

Irulebuild has many extension methods in the Defaultvalidatorextensions class, as follows

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Let's take a look at the effect with Google DHC

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If nothing is passed, it is validated against the validation rules above.

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If an email is sent, it verifies that the email is correct.

Finally, remember to add the following code to the Globle.asax.cs

Dataannotationsmodelvalidatorprovider.addimplicitrequiredattributeforvaluetypes = false; MODELVALIDATORPROVIDERS.PROVIDERS.ADD (New Fluentvalidationmodelvalidatorprovider (New Attributedvalidatorfactory ( ))); Validatoroptions.cascademode = cascademode.stoponfirstfailure; Fluentvalidationmodelvalidatorprovider.configure ();

All right, here we go today, for more details, please read the following blog post.

https://chsakell.com/2015/01/17/web-api-powerful-custom-model-validation-with-fluentvalidation/

This article is from the "Technology Creation value" blog, please be sure to keep this source http://leelei.blog.51cto.com/856755/1788944

fluentvalidation validation of ASP. NET Web API