CODEWITHSUNDEEP
c#javascriptjqueryajax
Vignesh Subramanian
Vignesh Subramanian

Reputation: 7289

How do i pass objects to handlers in ajax

I need to create an object in the javascript and pass it to handler

var EducationalInstitute = new Object();
EducationalInstitute.InstituteId = iInstituteId;
EducationalInstitute=Name;

Now i need to pass this in ajax

 $.ajax({
        url: "../Handlers/DeleteEducationalInstitutes.ashx",
        dataType: "json",
        responseType: "json",
        cache: "false",
        data: { EducationalInstitute: JSON.stringify(EducationalInstitute) },
        success: DeleteEISuccess
    });

The problem is I am not aware of how to get this in the handler as object!

var Institute = context.Request.QueryString["EducationalInstitute"];
EducationalInstitute educationalInstitute = (EducationalInstitute)new JavaScriptSerializer().DeserializeObject(Institute);

The value i am getting for Institute is {"InstituteId":"1"}

The class definition is

 public class EducationalInstitute
    {
        [DataMember]
        public int InstituteID { get; set; }
        [DataMember]
        public string InstituteName { get; set; }
        [DataMember]
        public string Zone { get; set; }
    }

I am getting the error 

{"Unable to cast object of type 'System.Collections.Generic.Dictionary`2[System.String,System.Object]' to type 'namespace.BusinessEntities.EducationalInstitute'."}

Upvotes: 0

Views: 1515

Answers (2)

Vignesh Subramanian
Vignesh Subramanian

Reputation: 7289

This is how i did it

var Team = { EducationalInstitute: EducationalInstitute, Location: "Chennai", Mentor: Mentor, TeamDescription: TeamDescription, TeamId: 1, TeamLeader:"",TeamLogo: TeamLogo, TeamName: TeamName };

Ajax call

 $.ajax({
            url: "../Handlers/CreateTeam.ashx",
            dataType: "json",
            responseType: "json",
            data: {Team:JSON.stringify(Team)},
            success: createTeamSuccess,
            error:createTeamError
            });

C# Code

Team team=new Team();
var teamObject = context.Request.QueryString["Team"];
team = (Team)new JavaScriptSerializer().Deserialize(teamObject,typeof(Team));

Upvotes: 0

markpsmith
markpsmith

Reputation: 4918

I think it's the way you're creating the model in the javascript:

var model= {InstituteId: iInstituteId, InstituteName: iName};

where iInstituteId & iName are vars you've created in the client side code

    $.ajax({
            url: "../Handlers/EducationalInstitutes.ashx",
            dataType: "json",
            responseType: "json",
            cache: "false",
            data: {EducationalInstitute:JSON.stringify(model)},

Here's an example: http://geekswithblogs.net/pabothu/archive/2011/05/21/passing-a-complex-json-object-to-ashx-and-reading-it.aspx

Upvotes: 1

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