Tag: C#

Select with optgroup via ajax and mvc controller

~ Warren LaFrance ~ Leave a comment

I had a need to bind a select control to a set of json data delievered via a  $ ajax call…

 

C# method

 public List<SelectListItem> changeHistorySelect { get; private set; }

        [AcceptVerbs(HttpVerbs.Get)]

        public ActionResult GetChangeHistorySelect(Int64 Id)
        {
            var selectListGroup_Info = new SelectListGroup() { Name = "Info"};
            var selectListGroup_Allotments = new SelectListGroup() { Name = "Allotments" };
            var selectListGroup_Financial = new SelectListGroup() { Name = "Financial" };
            var selectListGroup_Daily_Status = new SelectListGroup() { Name = "Daily Status" };
            var selectListGroup_Enrollments = new SelectListGroup() { Name = "Enrollments" };

            #region  Misc Code...

            // Build list
            changeHistorySelect = new List<SelectListItem>
            {
              new  SelectListItem
              {
                  Value = "",
                  Text = "- Select -",
                  Selected = true
                 
              },
                new SelectListItem
                {
                    Value = "student",
                    Text = "Student",
                    Group = selectListGroup_Info
                },
                new SelectListItem
                {
                    Value = "altAddresses",
                    Text = "Alternate Addresses",
                    Group = selectListGroup_Info
                },
                new SelectListItem
                {
                    Value = "enrollment",
                    Text = "Enrollment",
                    Group = selectListGroup_Info
                },
                new SelectListItem
                {
                    Value = "enrollmentType",
                    Text = "Enrollment Type",
                    Group = selectListGroup_Info
                },


                new SelectListItem
                {
                    Value = "allotteeInfo",
                    Text = "Allottee Information",
                    Group = selectListGroup_Allotments
                },

                new SelectListItem
                {
                    Value = "earnings",
                    Text = "Earnings",
                    Group = selectListGroup_Financial
                },
                new SelectListItem
                {
                    Value = "deductions",
                    Text = "Deductions",
                    Group = selectListGroup_Financial
                },
                new SelectListItem
                {
                    Value = "reimbursements",
                    Text = "Reimbursements",
                    Group = selectListGroup_Financial
                },
                new SelectListItem
                {
                    Value = "accruals",
                    Text = "Accruals",
                    Group = selectListGroup_Financial
                },
              
            };

            // Now add enrollments to list

            var enrollments = new StudentChangeHistoryService().GetStudentEnrollment(Id);
            foreach (var er in enrollments)
            {
                if (er.sep_dt.ToString() == "1/1/0001 12:00:00 AM")
                {
                    changeHistorySelect.Add(new SelectListItem
                    {
                        Value = er.enr_dt != null ? er.enr_dt.Value.ToString("MM/dd/yyyy") : String.Empty,
                        Text = "Current Enrollment: " + (er.enr_dt != null ? er.enr_dt.Value.ToString("MM/dd/yyyy") : String.Empty) + " - Current",
                        Group = selectListGroup_Daily_Status
                    });
                }
                else
                {
                    changeHistorySelect.Add(new SelectListItem
                    {
                        Value = er.enr_dt != null ? er.enr_dt.Value.ToString("MM/dd/yyyy") : String.Empty,
                        Text = String.Format("Prior Enrollment: {0} - {1} ", er.enr_dt != null ? er.enr_dt.Value.ToString("MM/dd/yyyy") : String.Empty,(er.sep_dt != null ? er.sep_dt.Value.ToString("MM/dd/yyyy"): String.Empty)), 
                        Group = selectListGroup_Daily_Status
                    });
                }


            }

            var jsonResult = Json(changeHistorySelect);
            #endregion

            return Json(changeHistorySelect,JsonRequestBehavior.AllowGet);
        }

Now I need to have the UI call and build selector in javascript



 function getChangeHistorySelect(studentId) {

            $.getJSON('@Url.Action("GetChangeHistorySelect")', { Id: studentId }).done(function (data) {

                console.log(data);
                var result = data;

                var changeHistorySelect = $('#changeHistorySelect');
                changeHistorySelect.empty();
                var groupName = '';
                var groupPreviousName = '';
                $.each(result,
                    function () {
                        // Need an outloop for the option group
                       // debugger;
                        if (this.Group != null) {
                            // Has the group already been added?
                            var group = this.Group;
                            if (groupName === '') {

                                groupName = group.Name;
                                groupPreviousName = groupName;
                                // First Add...
                                changeHistorySelect.append(
                                    $('<optgroup>',
                                        {
                                            label: groupName,
                                            id: groupName
                                        }));


                            } else {
                                groupName = group.Name;
                                // A group has already been added... does it match?
                                if (groupPreviousName === groupName) {
                                    // They Match skip (added select under this group
                                } else {
                                    // They don' match, add new optGroup and contiue on to add selects under it
                                    groupName = group.Name;
                                    groupPreviousName = groupName;

                                    changeHistorySelect.append(
                                        $('<optgroup>',
                                            {
                                                label: groupName,
                                                id: groupName.replace(/\s/g, "")
                                            }));
                                }
                            }
                            // Add Option Group
                            var custom = $('#' + groupName.replace(/\s/g, ""));
                            var option = $("<option></option>");
                            option.val(this.Value);
                            option.text(this.Text);
                            option.appendTo(custom);


                        } else {
                            changeHistorySelect.append(
                                                           $('<option>',
                                                               {
                                                                   value: this.Value
                                                               }).text(this.Text)
                                                       );
                        }

                    });

            });
        }


.


 


 


 


 


 


 

			

	


				
					


				
					


				
					


	

		
IdentityServer3 Custom Views for login
	

			

			
		

				

			 ~ Warren LaFrance			 ~ Leave a comment					

				

		
So in my endeavors to support Facebook, Google, Outlook and etc login providers the middle ware IdentityServer3 on git has proven worth its weight in gold.


If you need to customize the views for a client, let us suppose a customer wants the login page to be branded for their company logo….What??… the nerve of them.. lol… Seriously, it is extremely easy… See this link: [ branding ]  Perhaps they want to use a bootstrap theme, different layout or various validation rules… See that link…


UP NEXT:


My next post will be about using this with an Angular2 application. Much easier than I even thought!

			

	


				
					


	

		
IdentityServer3 Login Form + Anonymous Auth on IIS
	

			

			
		

				

			 ~ Warren LaFrance			 ~ Leave a comment					

				

		
When you deploy to IIS be sure to edit the web sites Authentication settings


Anonymous Authentication: Enabled


Basic Authentication: Disabled


Windows Authentication: Disabled


Digest Authentication: Disabled


Forms Authentication: Disabled


ASP.NET Authentication: Disabled


With this setup, you will not automatically be logged in via your Domain Account, but instead prompted to login via the Middleware Login Page.


If you want your users to use their windows login, you can enable Windows Authentication.


 

			

	


				
					


	

		
IdentityServer3 + MVC Login Infinite loop
	

			

			
		

				

			 ~ Warren LaFrance			 ~ Leave a comment					

				

		
I upgraded an existing MVC3 Project that once used Web Form login and Active Directory as a means to authenticate a user,  to now  use a login process similar to sites that let you use OAUTH2 but pick either facebook, google or other identity service provider.


When I finished the upgrade process I was getting the login form via the IdentityServer3 middle-ware, but when it tried to redirect to the original site (client) it was just loop and loop… and … well you get the point by now….


To fix the issue: (found numerous solutions here…)


The short is that I needed to either add the session_onstart in global aspx or add a CallbackPath.


GLOBAL.ASAX file fix:


 protected void Session_Start(object sender, EventArgs e)
 {
 /// When using cookie-based session state, ASP.NET does not allocate storage for session data until the Session object is used. 
 /// As a result, a new session ID is generated for each page request until the session object is accessed. 
 /// If your application requires a static session ID for the entire session, 
 /// you can either implement the Session_Start method in the application's Global.asax file and store data in the Session object to fix the session ID, 
 /// or you can use code in another part of your application to explicitly store data in the Session object.
 base.Session["init"] = 0;
 }


The  CallBackPath solution goes in your code where you are configuring your owin process app.UseOpenIdConnectAuthentication  — do this in the client application.


 app.UseOpenIdConnectAuthentication(new OpenIdConnectAuthenticationOptions
 {
 ClientId = "app_jcrl",
 Authority = Constants.BaseAddress,
 RedirectUri = "https://jcrl3g.jcdev.org/home/",
 PostLogoutRedirectUri = "https://jcrl3g.jcdev.org/",
 ResponseType = "code id_token",
 Scope = "openid profile read write offline_access",
 CallbackPath = new PathString("/home/index/"), // Critical to prevent infinite loop 
 TokenValidationParameters = new TokenValidationParameters
 {
 NameClaimType = "name",
 RoleClaimType = "role"
 },

			

	


				
					


	

		
&, | , &&, || what…?
	

				

			 ~ Warren LaFrance			 ~ Leave a comment					

				

		
A friend of mine was wondering the advantage over the various operators.  I used the wording short circuits and thus does not eval the portion of the op to the right.


I sent her to this documentation site…


&& and || Operators


    

  • To avoid exceptions and increase performance by skipping unnecessary comparisons, use && instead of & and || instead of | when you perform comparisons, as shown in the following example.

    

    

    C#
    

    

    

    

    

    

                Console.Write("Enter a dividend: ");
            var dividend = Convert.ToInt32(Console.ReadLine());

            Console.Write("Enter a divisor: ");
            var divisor = Convert.ToInt32(Console.ReadLine());

            // If the divisor is 0, the second clause in the following condition
            // causes a run-time error. The && operator short circuits when the
            // first expression is false. That is, it does not evaluate the
            // second expression. The & operator evaluates both, and causes 
            // a run-time error when divisor is 0.
            if ((divisor != 0) && (dividend / divisor > 0))
            {
                Console.WriteLine("Quotient: {0}", dividend / divisor);
            }
            else
            {
                Console.WriteLine("Attempted division by 0 ends up here.");
            }

    

    

    

    

    

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